:root {
  --purple-deep: #2d2b55;
  --purple: #7c3aed;
  --purple-mid: #8b5cf6;
  --purple-light: #c4b5fd;
  --purple-bg: #ede9fe;
  --lavender: #ddd6fe;
  --cream: #fef9ef;
  --blue-light: #dbeafe;
  --pink: #ede9fe;
  --bg: #eae5f5;
  --text: #1e1b4b;
  --text-light: #4c4878;
  --text-muted: #9ca3af;
  --white: #ffffff;
  --border: #e0daf0;
  --danger: #ef4444;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 2px 12px rgba(45,43,85,0.06);
  --shadow-lg: 0 8px 32px rgba(45,43,85,0.12);
  --accent: var(--purple);
  --accent-light: var(--purple-light);
  --accent-dark: #6d28d9;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.screen { display: none; }
.screen.active { display: block; }
.view { display: none; }
.view.active { display: block; }

/* Login */
.login-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #c4b5fd 0%, #ede9fe 40%, #dbeafe 100%);
  padding: 20px;
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo i {
  font-size: 48px;
  color: var(--purple);
  margin-bottom: 12px;
}

.login-logo h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}

.login-logo p {
  color: var(--text-light);
  font-size: 14px;
  margin-top: 4px;
}

#login-form {
  background: var(--white);
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 380px;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light);
  margin-bottom: 6px;
}

.form-group input, .form-group select, .form-group textarea, .invite-create input {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--white);
  transition: border-color 0.2s;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus, .invite-create input:focus {
  outline: none;
  border-color: var(--purple);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
}

.form-row {
  display: flex;
  gap: 12px;
  align-items: flex-end;
}

.form-row .form-group { flex: 1; }

.error-text {
  color: var(--danger);
  font-size: 13px;
  margin-top: 8px;
  min-height: 18px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--purple);
  color: var(--white);
}
.btn-primary:hover { background: var(--accent-dark); }

.btn-outline {
  background: transparent;
  color: var(--purple);
  border: 1.5px solid var(--purple);
}
.btn-outline:hover { background: var(--purple); color: var(--white); }

.btn-ghost {
  background: transparent;
  color: var(--text-light);
}
.btn-ghost:hover { background: rgba(124,58,237,0.06); }

.btn-danger {
  background: var(--danger);
  color: var(--white);
}
.btn-danger:hover { opacity: 0.9; }

.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-full { width: 100%; justify-content: center; }

.btn-round {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--purple-bg);
  color: var(--purple);
  border: none;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.2s;
}
.btn-round:hover { background: var(--purple); color: var(--white); }

/* Nav */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(224,218,240,0.5);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo { font-size: 22px; color: var(--purple); }
.nav-title { font-weight: 700; font-size: 18px; color: var(--text); }

.nav-search {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: 28px;
  padding: 8px 18px;
  width: 320px;
  transition: border-color 0.2s;
}

.nav-search i { color: var(--text-muted); font-size: 14px; }

.nav-search input {
  border: none;
  outline: none;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: transparent;
  width: 100%;
}

.nav-search:focus-within { border-color: var(--purple-light); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--purple-bg);
  color: var(--text-light);
  cursor: pointer;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.nav-icon-btn:hover { background: var(--purple-light); color: var(--text); }

.user-name {
  font-size: 13px;
  color: var(--text-light);
  font-weight: 500;
}

.user-avatar-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--purple-light);
  background: var(--purple-bg);
  color: var(--purple);
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.user-avatar-btn:hover { background: var(--purple-light); }

/* ===== BENTO HOME GRID ===== */
.home-bento {
  padding: 28px;
}

.bento-grid {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1fr;
  grid-auto-rows: minmax(160px, auto);
  gap: 16px;
}

.bento-card {
  border-radius: 20px;
  padding: 24px;
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.bento-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(45,43,85,0.15);
}

.bento-card h3 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 6px;
}

.bento-card p {
  font-size: 14px;
  line-height: 1.4;
  opacity: 0.8;
  max-width: 200px;
}

/* Hero card (My Notes) */
.bento-hero {
  grid-row: span 2;
  background: linear-gradient(145deg, #2d2b55 0%, #3b3880 60%, #4f46e5 100%);
  color: var(--white);
}

.bento-hero::after {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(139,92,246,0.25);
}

.bento-hero::before {
  content: '';
  position: absolute;
  bottom: 30px;
  right: 60px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(99,102,241,0.2);
}

.bento-hero h3 {
  font-size: 32px;
  font-weight: 800;
}

.bento-hero p {
  font-size: 15px;
  opacity: 0.75;
  max-width: 220px;
}

.bento-hero .bento-icon {
  background: rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.9);
}

.bento-hero .bento-arrow {
  background: rgba(255,255,255,0.2);
  color: var(--white);
}

.bento-hero .bento-arrow:hover {
  background: rgba(255,255,255,0.35);
}

/* Bento grid — main layout */
.bento-grid-main {
  grid-template-columns: 1.5fr 1.5fr 1fr;
}

/* Past Mistakes bento card */
.bento-mistake {
  background: linear-gradient(145deg, #3b1440 0%, #5b2d6e 60%, #7c3aed 100%);
  color: var(--white);
}

.bento-mistake::after {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(239,68,68,0.15);
}

.bento-mistake::before {
  content: '';
  position: absolute;
  bottom: 20px;
  right: 40px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(239,68,68,0.1);
}

.bento-mistake h3 { font-size: 28px; font-weight: 800; }
.bento-mistake p { font-size: 14px; opacity: 0.75; }
.bento-mistake .bento-arrow { background: rgba(255,255,255,0.2); color: var(--white); }
.bento-mistake .bento-arrow:hover { background: rgba(255,255,255,0.35); }

.bento-mistake-count {
  font-size: 13px;
  font-weight: 600;
  margin-top: 8px;
  opacity: 0.7;
}

.bento-mistake-count.has-count {
  opacity: 1;
  color: #fca5a5;
}

/* Card color variants */
.bento-cream { background: #fef9ef; color: var(--text); }
.bento-blue { background: #dbeafe; color: #1e3a5f; }
.bento-lavender { background: #e8d5f5; color: #3b1f6e; }
.bento-light { background: #f1eef9; color: var(--text); }

/* Bento icon circle */
.bento-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(124,58,237,0.12);
  color: var(--purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 14px;
}

/* Bento arrow button */
.bento-arrow {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(124,58,237,0.1);
  color: var(--purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  margin-top: 12px;
  transition: all 0.2s;
  align-self: flex-start;
}

.bento-arrow:hover {
  background: var(--purple);
  color: var(--white);
}

.bento-blue .bento-icon { background: rgba(59,130,246,0.15); color: #3b82f6; }
.bento-blue .bento-arrow { background: rgba(59,130,246,0.12); color: #3b82f6; }
.bento-blue .bento-arrow:hover { background: #3b82f6; color: var(--white); }

.bento-lavender .bento-icon { background: rgba(139,92,246,0.15); color: #7c3aed; }
.bento-lavender .bento-arrow { background: rgba(139,92,246,0.12); color: #7c3aed; }
.bento-lavender .bento-arrow:hover { background: #7c3aed; color: var(--white); }

.bento-cream .bento-icon { background: rgba(124,58,237,0.1); color: #7c3aed; }
.bento-cream .bento-arrow { background: rgba(124,58,237,0.08); color: #7c3aed; }
.bento-cream .bento-arrow:hover { background: #7c3aed; color: var(--white); }

/* ===== BROWSE VIEW ===== */
.browse-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 24px;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
}

.browse-header h2 {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.browse-filters {
  display: flex;
  gap: 8px;
}

.browse-filters select {
  padding: 7px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
  color: var(--text);
  background: var(--white);
  cursor: pointer;
}

.browse-filters select:focus {
  outline: none;
  border-color: var(--purple);
}

/* Content Grid */
.content-area {
  padding: 24px;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.content-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: all 0.2s;
  border: 1.5px solid transparent;
  position: relative;
}

.card-delete-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: none;
  border: none;
  color: #ccc;
  cursor: pointer;
  font-size: 14px;
  padding: 4px 6px;
  border-radius: 6px;
  transition: all 0.2s;
  opacity: 0;
  z-index: 2;
}

.content-card:hover .card-delete-btn { opacity: 1; }
.card-delete-btn:hover { color: #e74c3c; background: rgba(231,76,60,0.08); }

.content-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--purple-light);
}

.card-type {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.card-type.slide { background: var(--purple-bg); color: var(--purple); }
.card-type.quiz { background: #dbeafe; color: #3b82f6; }

.card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.3;
}

.card-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}

.card-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.card-tags {
  display: flex;
  gap: 6px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.tag {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 20px;
  background: var(--purple-bg);
  color: var(--text-light);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
}

.empty-state i { font-size: 48px; margin-bottom: 16px; }
.empty-state p { font-size: 16px; }

/* Viewer Header */
.viewer-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.viewer-header h2 {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
}

.viewer-actions { display: flex; gap: 8px; }

/* Learn View */
.learn-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 57px);
}

.learn-progress-bar {
  display: flex;
  gap: 4px;
  padding: 16px 0 12px;
}

.learn-seg {
  flex: 1;
  height: 5px;
  border-radius: 3px;
  background: var(--border);
  transition: background 0.3s;
}

.learn-seg.done { background: var(--purple); }
.learn-seg.active { background: var(--purple-light); }

.learn-step-count {
  font-size: 13px;
  color: var(--text-muted);
  text-align: right;
  margin-bottom: 12px;
}

.learn-card {
  background: var(--white);
  border-radius: 20px;
  padding: 28px;
  box-shadow: 0 2px 20px rgba(45,43,85,0.06);
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-bottom: 16px;
}

.learn-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 4px 12px;
  border-radius: 6px;
  margin-bottom: 16px;
  width: fit-content;
}

.learn-badge.read { background: var(--purple-bg); color: var(--purple); }
.learn-badge.question { background: #fce7f3; color: #be185d; }

.learn-card h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  line-height: 1.2;
}

.learn-card-body {
  display: flex;
  gap: 24px;
  flex: 1;
  align-items: flex-start;
}

.learn-card-body.learn-text-only {
  flex-direction: column;
}

.learn-card-visual {
  flex-shrink: 0;
  max-width: 40%;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fafafa;
}

.learn-text-only .learn-card-text {
  width: 100%;
}

.learn-card-visual img,
.learn-card-visual canvas {
  display: block;
  width: 100%;
  height: auto;
  max-height: 360px;
  object-fit: contain;
}

.learn-card-text {
  flex: 1;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.learn-card-text > ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.learn-card-text > ul > li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 12px;
}

.learn-card-text > ul > li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--purple-light);
}

.learn-card-text ul ul {
  list-style: none;
  padding: 0 0 0 20px;
  margin-top: 6px;
}

.learn-card-text ul ul li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 6px;
  color: var(--text-light);
  font-size: 14px;
}

.learn-card-text ul ul li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1.5px solid var(--purple-light);
  background: transparent;
}

.learn-term {
  font-weight: 600;
  background: rgba(196,181,253,0.3);
  padding: 2px 8px;
  border-radius: 5px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.learn-bold { font-weight: 700; color: var(--text); }

.learn-card-text p { margin-bottom: 12px; }

.learn-card-full {
  font-size: 15px;
  line-height: 1.8;
  flex: 1;
}

/* Learn question card */
.learn-q-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.learn-q-opt {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border: 2px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  font-size: 15px;
  transition: all 0.15s;
  background: var(--white);
}

.learn-q-opt:hover { border-color: var(--purple-light); background: var(--purple-bg); }
.learn-q-opt.selected { border-color: var(--purple); background: rgba(124,58,237,0.06); }
.learn-q-opt.correct { border-color: #22c55e; background: rgba(34,197,94,0.08); }
.learn-q-opt.wrong { border-color: var(--danger); background: rgba(239,68,68,0.06); }
.learn-q-opt.reveal { border-color: #22c55e; }
.learn-q-opt.disabled { pointer-events: none; opacity: 0.7; }

.learn-q-mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
  transition: all 0.15s;
}

.learn-q-opt.selected .learn-q-mark,
.learn-q-opt.correct .learn-q-mark {
  background: var(--purple);
  border-color: var(--purple);
  color: var(--white);
}
.learn-q-opt.wrong .learn-q-mark {
  background: var(--danger);
  border-color: var(--danger);
  color: var(--white);
}

.learn-q-feedback {
  padding: 14px 18px;
  border-radius: 12px;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.5;
  display: none;
}
.learn-q-feedback.show { display: block; }
.learn-q-feedback.correct { background: rgba(34,197,94,0.1); color: #166534; }
.learn-q-feedback.wrong { background: rgba(239,68,68,0.08); color: #991b1b; }

/* Learn nav */
.learn-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0 24px;
}

.learn-nav-hint {
  font-size: 13px;
  color: var(--text-muted);
}

.learn-btn-back {
  padding: 10px 24px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--white);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  color: var(--text-light);
  transition: all 0.15s;
}
.learn-btn-back:hover { border-color: var(--purple-light); }

.learn-btn-next {
  padding: 12px 32px;
  border: none;
  border-radius: 10px;
  background: var(--purple);
  color: var(--white);
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}
.learn-btn-next:hover { background: var(--accent-dark); }
.learn-btn-next:disabled { opacity: 0.5; cursor: not-allowed; }

/* Curated content body */
.curated-body { font-size: 15px; line-height: 1.75; }
.curated-body p { margin-bottom: 12px; }
.curated-body ul { padding-left: 20px; margin-bottom: 12px; }
.curated-body ul li { margin-bottom: 6px; }
.curated-body b { font-weight: 700; color: var(--text); }
.curated-body .k {
  font-weight: 600;
  background: rgba(196,181,253,0.3);
  padding: 2px 8px;
  border-radius: 5px;
}
.curated-body .mem {
  background: rgba(237,233,254,0.5);
  border-left: 3px solid var(--purple-light);
  padding: 10px 14px;
  border-radius: 0 8px 8px 0;
  margin: 14px 0;
  font-size: 14px;
  line-height: 1.6;
}
.curated-body .tscroll { overflow-x: auto; margin: 12px 0; }
.curated-body table.t {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.curated-body table.t th {
  background: var(--purple-bg);
  color: var(--purple);
  font-weight: 600;
  text-align: left;
  padding: 10px 14px;
}
.curated-body table.t td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.6;
}
.curated-body table.t tr:last-child td { border-bottom: none; }
.curated-body table.t tr:nth-child(even) td { background: rgba(196,181,253,0.06); }

/* Learn image caption */
.learn-img-cap {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  padding: 6px 10px;
  font-style: italic;
}

/* Multiple images */
.learn-card-visuals {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.learn-card-visuals .learn-card-visual {
  flex: 1;
  min-width: 140px;
  max-width: 48%;
}

/* Curated lesson nav */
.curated-lesson-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0 4px;
}
.curated-lesson-select {
  flex: 1;
  padding: 8px 12px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  background: var(--white);
  color: var(--text);
  cursor: pointer;
}
.curated-lesson-select:focus { border-color: var(--purple); outline: none; }
.curated-lesson-count {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

/* Numeric input */
.learn-num-input {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  align-items: center;
}
.learn-num-field {
  flex: 1;
  max-width: 240px;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 16px;
  font-family: inherit;
  background: var(--white);
}
.learn-num-field:focus { border-color: var(--purple); outline: none; }
.learn-num-field.correct { border-color: #22c55e; background: rgba(34,197,94,0.06); }
.learn-num-field.wrong { border-color: var(--danger); background: rgba(239,68,68,0.04); }
.learn-btn-check {
  padding: 12px 24px;
  border: none;
  border-radius: 10px;
  background: var(--purple);
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
}
.learn-btn-check:hover { background: var(--accent-dark); }
.learn-btn-check:disabled { opacity: 0.5; cursor: not-allowed; }

/* FRQ */
.learn-frq-parts { margin-top: 16px; }
.learn-frq-part {
  margin-bottom: 20px;
  border-left: 3px solid var(--purple-light);
  padding-left: 16px;
}
.learn-frq-prompt {
  font-size: 15px;
  margin-bottom: 8px;
  line-height: 1.5;
}
.learn-frq-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  resize: vertical;
  line-height: 1.5;
}
.learn-frq-textarea:focus { border-color: var(--purple); outline: none; }
.learn-frq-reveal {
  margin-top: 6px;
  padding: 6px 14px;
  border: 1px solid var(--purple-light);
  border-radius: 6px;
  background: transparent;
  color: var(--purple);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}
.learn-frq-reveal:hover { background: var(--purple-bg); }
.learn-frq-model {
  margin-top: 8px;
  padding: 10px 14px;
  background: rgba(124,58,237,0.06);
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.5;
}
.frq-img { margin-bottom: 16px; max-width: 100%; }
.frq-img img { border-radius: 10px; }

@media (max-width: 600px) {
  .learn-card { padding: 18px; }
  .learn-card h2 { font-size: 20px; }
  .learn-card-body { flex-direction: column; }
  .learn-card-visual { max-width: 100%; }
  .learn-card-visual img,
  .learn-card-visual canvas { max-height: 280px; }
  .learn-card-visuals .learn-card-visual { max-width: 100%; }
  .learn-num-input { flex-direction: column; align-items: stretch; }
  .learn-num-field { max-width: 100%; }
  .curated-lesson-nav { flex-direction: column; align-items: stretch; }
}

/* Slide Viewer */
.slide-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

.slide-content {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  min-height: 400px;
  padding: 40px;
  margin-bottom: 20px;
}

.slide-page h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--purple);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--purple-light);
}

.slide-page .slide-body {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}
.slide-page .slide-body p {
  margin-bottom: 6px;
}

.slide-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 20px;
}

#slide-counter {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  min-width: 60px;
  text-align: center;
}

.slide-thumbnails {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 8px 0;
}

.slide-thumb {
  min-width: 100px;
  padding: 8px 12px;
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.slide-thumb:hover { border-color: var(--purple); }
.slide-thumb.active { border-color: var(--purple); background: var(--purple-bg); }

/* PDF Viewer */
.pdf-viewer-frame {
  width: 100%;
  min-height: 500px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--white);
}

/* Quiz */
.quiz-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px;
}

.quiz-topics {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.topic-btn {
  padding: 6px 14px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  background: var(--white);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}
.topic-btn:hover { border-color: var(--purple); }
.topic-btn.active { background: var(--purple); color: var(--white); border-color: var(--purple); }

.quiz-question {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.question-number {
  font-size: 12px;
  font-weight: 600;
  color: var(--purple);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.question-text {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 16px;
  line-height: 1.5;
}

.question-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.option-label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
}

.option-label:hover { border-color: var(--purple-light); background: var(--purple-bg); }

.option-label input { display: none; }

.option-label input:checked + .option-mark {
  background: var(--purple);
  border-color: var(--purple);
  color: var(--white);
}

.option-label input:checked ~ .option-text { font-weight: 500; }

.option-label:has(input:checked) {
  border-color: var(--purple);
  background: rgba(124,58,237,0.06);
}

.option-mark {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
  transition: all 0.2s;
}

.quiz-submit {
  text-align: center;
  margin-top: 24px;
}

/* Results */
.results-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px;
}

.results-score {
  text-align: center;
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.score-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--purple-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 32px;
  font-weight: 700;
  color: var(--purple);
}

.score-label {
  font-size: 14px;
  color: var(--text-light);
}

.result-question {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--border);
}

.result-question.correct { border-left-color: #22c55e; }
.result-question.incorrect { border-left-color: var(--danger); }

.result-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 8px;
}

.result-badge.correct { background: rgba(34,197,94,0.12); color: #166534; }
.result-badge.incorrect { background: rgba(239,68,68,0.1); color: var(--danger); }

.result-explanation {
  margin-top: 10px;
  padding: 10px 14px;
  background: var(--purple-bg);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-light);
}

/* Admin */
.admin-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 24px;
}

.admin-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.admin-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--purple);
}

.users-list { display: flex; flex-direction: column; gap: 8px; }

.user-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.user-info { display: flex; flex-direction: column; gap: 2px; }
.user-info strong { font-size: 14px; }
.user-info span { font-size: 12px; color: var(--text-muted); }

.user-actions { display: flex; gap: 6px; }

/* Modal */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(30,27,75,0.35);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.active { display: flex; }

.modal-content {
  background: var(--white);
  border-radius: 20px;
  padding: 28px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-sm { max-width: 400px; }
.modal-lg { max-width: 800px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-header h3 { font-size: 18px; font-weight: 600; }

.modal-footer {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* File Upload */
.file-drop {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}

.file-drop:hover { border-color: var(--purple); background: rgba(124,58,237,0.04); }
.file-drop.dragover { border-color: var(--purple); background: rgba(124,58,237,0.08); }

.file-drop i { font-size: 32px; color: var(--purple-light); margin-bottom: 8px; }
.file-drop p { font-size: 13px; color: var(--text-muted); }

.file-drop input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.file-name { font-size: 13px; color: var(--purple); margin-top: 6px; word-break: break-all; line-height: 1.5; }

/* Share */
.share-content { text-align: center; }

.share-code-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 16px 0;
  padding: 14px 20px;
  background: var(--purple-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.share-code-display span {
  font-size: 20px;
  font-weight: 600;
  font-family: 'Courier New', monospace;
  letter-spacing: 2px;
  color: var(--purple);
}

.share-hint {
  font-size: 12px;
  color: var(--text-muted);
}

/* Question Editor */
.question-editor { max-height: 60vh; overflow-y: auto; }

.editor-question {
  background: var(--purple-bg);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 12px;
}

.editor-question .form-group { margin-bottom: 10px; }

.editor-question textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
  resize: vertical;
  min-height: 60px;
}

.editor-options {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.editor-option-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.editor-option-row input[type="text"] {
  flex: 1;
  padding: 6px 10px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
}

.editor-option-row input[type="radio"] { flex-shrink: 0; }

.editor-question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.editor-question-header strong { font-size: 13px; color: var(--purple); }

/* Responsive */
@media (max-width: 900px) {
  .bento-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
  }
  .bento-grid-main { grid-template-columns: 1fr 1fr; }
  .bento-hero {
    grid-column: span 2;
    grid-row: span 1;
  }
  .bento-mistake { grid-column: span 2; }
  .bento-mocktest { grid-column: span 2; }
  .bento-hero h3 { font-size: 26px; }
  .bento-mistake h3 { font-size: 24px; }
  .nav-search { width: 200px; }
}

@media (max-width: 768px) {
  .browse-filters { display: none; }
  .content-grid { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }
  .slide-content { padding: 20px; }
  .nav-search { display: none; }
}

@media (max-width: 600px) {
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .bento-hero {
    grid-column: span 1;
    grid-row: span 1;
  }
  .bento-mistake { grid-column: span 1; }
  .bento-mocktest { grid-column: span 1; }
  .bento-hero h3 { font-size: 24px; }
  .bento-mistake h3 { font-size: 22px; }
  .home-bento { padding: 16px; }
  .bento-grid { gap: 12px; }
}

@media (max-width: 480px) {
  .top-nav { padding: 10px 14px; }
  .nav-title { display: none; }
  .content-area { padding: 12px; }
}

/* Lesson Viewer */
.lesson-container {
  height: calc(100vh - 57px);
  width: 100%;
}

.lesson-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: #fff;
}

/* Card type: lesson */
.card-type.lesson { background: var(--purple-bg); color: var(--purple); }

/* Progress View */
.progress-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

.progress-user-group {
  margin-bottom: 28px;
}

.progress-user-group h3 {
  color: var(--purple);
  margin-bottom: 12px;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.progress-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.progress-item {
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.progress-item:hover {
  border-color: var(--purple-light);
}

.progress-item-title {
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.progress-item-meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.progress-item-meta i {
  margin-right: 4px;
}

/* Knowt-style Lesson List */
.lesson-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 700px;
  margin: 0 auto;
}

.lesson-row {
  background: var(--white);
  border-radius: 14px;
  box-shadow: 0 1px 4px rgba(45,43,85,0.06);
  overflow: hidden;
}

.lesson-row-main {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  cursor: pointer;
  transition: background 0.15s;
}

.lesson-row-main:hover {
  background: rgba(124,58,237,0.03);
}

.lesson-ring {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
}

.lesson-row-info {
  flex: 1;
  min-width: 0;
}

.lesson-row-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lesson-row-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 3px;
}

.lesson-row-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.btn-icon-sm {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.btn-icon-sm:hover {
  border-color: var(--purple-light);
  color: var(--purple);
}

.chevron-btn i {
  transition: transform 0.2s;
}

/* Expanded detail */
.lesson-detail {
  border-top: 1px solid var(--border);
  padding: 4px 20px 12px 80px;
}

.lesson-detail-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
  font-size: 14px;
}

.lesson-detail-item:hover {
  background: var(--purple-bg);
}

.lesson-detail-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--purple-bg);
  color: var(--purple);
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.lesson-detail-title {
  flex: 1;
  color: var(--text);
}

.lesson-detail-steps {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

.lesson-detail-meta {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

.ldi-chip {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
}

.ldi-chip.new { background: var(--border); color: var(--text-muted); }
.ldi-chip.done { background: rgba(34,197,94,0.12); color: #166534; }
.ldi-chip.part { background: rgba(124,58,237,0.1); color: var(--purple); }

/* Lesson Index View */
.lessons-index-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 24px;
}

.li-summary {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.li-summary-bar {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.li-summary-fill {
  height: 100%;
  background: #22c55e;
  border-radius: 4px;
  transition: width 0.3s;
}

.li-summary-text {
  font-size: 14px;
  color: var(--text-muted);
  white-space: nowrap;
}

.li-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.15s;
}

.li-row:hover { background: rgba(124,58,237,0.03); }
.li-row:first-child { border-top: 1px solid var(--border); }

.li-num {
  font-size: 14px;
  font-weight: 600;
  color: var(--purple);
  min-width: 32px;
}

.li-info { flex: 1; min-width: 0; }

.li-title {
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
  margin-bottom: 2px;
}

.li-meta { font-size: 13px; color: var(--text-muted); }

.li-chip {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  white-space: nowrap;
  flex-shrink: 0;
}

.li-chip.new { background: var(--border); color: var(--text-muted); }
.li-chip.done { background: rgba(34,197,94,0.12); color: #166534; }
.li-chip.part { background: rgba(124,58,237,0.1); color: var(--purple); }

/* Study Header */
.study-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.study-header h2 {
  flex: 1;
  font-size: 16px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.study-counter {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}

/* Card row (mistakes + mixed quiz) */
.li-cards-row {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.li-cards-row > div { flex: 1; }

@media (max-width: 500px) {
  .li-cards-row { flex-direction: column; }
}

/* Mistakes */
.mistakes-card {
  background: var(--white);
  border-radius: 14px;
  padding: 20px 24px;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(45,43,85,0.06);
  transition: all 0.15s;
}

.mistakes-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-1px); }
.mistakes-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.mistakes-card p { font-size: 14px; color: var(--text-muted); }
.mistakes-card.has-mistakes { border-left: 4px solid var(--danger); cursor: pointer; }
.mistakes-card.has-mistakes h3 { color: var(--danger); }

/* Mixed Quiz */
.mixed-quiz-card {
  background: var(--white);
  border-radius: 14px;
  padding: 20px 24px;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(45,43,85,0.06);
  transition: all 0.15s;
  border-left: 4px solid var(--purple);
}

.mixed-quiz-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-1px); }
.mixed-quiz-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 4px; color: var(--purple); }
.mixed-quiz-card p { font-size: 14px; color: var(--text-muted); }

/* Quiz result */
.quiz-result-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
  flex: 1;
}

.quiz-result-score {
  font-size: 64px;
  font-weight: 800;
  color: var(--purple);
  line-height: 1;
  margin-bottom: 8px;
}

.quiz-result-label {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 16px;
}

.quiz-result-msg {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.mistakes-context {
  font-size: 13px;
  color: var(--purple);
  font-weight: 500;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.learn-seg.wrong { background: var(--danger); }

/* Past Mistakes Section */
.pm-section {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 2px solid var(--border);
}

.pm-heading {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pm-heading i { color: var(--danger); font-size: 15px; }

.pm-group {
  background: var(--white);
  border-radius: 14px;
  box-shadow: 0 1px 4px rgba(45,43,85,0.06);
  margin-bottom: 12px;
  overflow: hidden;
  border-left: 3px solid var(--danger);
}

.pm-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  cursor: pointer;
  transition: background 0.15s;
}

.pm-group-header:hover { background: rgba(239,68,68,0.03); }

.pm-group-info { flex: 1; }

.pm-group-title {
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
}

.pm-group-count {
  font-size: 13px;
  color: var(--danger);
  margin-top: 2px;
}

.pm-question {
  padding: 10px 20px 10px 24px;
  font-size: 14px;
  color: var(--text-light);
  border-top: 1px solid rgba(224,218,240,0.5);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}

.pm-question i {
  color: var(--danger);
  font-size: 12px;
  margin-top: 4px;
  flex-shrink: 0;
  opacity: 0.6;
}

/* Past Mistakes View (dashboard-level) */
.pm-view-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 24px;
}

.pm-view-summary {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 20px;
  padding: 14px 20px;
  background: rgba(239,68,68,0.06);
  border-radius: 12px;
  border-left: 4px solid var(--danger);
}

.pm-view-topic {
  background: var(--white);
  border-radius: 14px;
  box-shadow: 0 1px 4px rgba(45,43,85,0.06);
  margin-bottom: 16px;
  overflow: hidden;
}

.pm-view-topic-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  cursor: pointer;
  transition: background 0.15s;
}

.pm-view-topic-header:hover { background: rgba(124,58,237,0.03); }

.pm-view-topic-info { flex: 1; }

.pm-view-topic-title {
  font-weight: 600;
  font-size: 16px;
  color: var(--text);
}

.pm-view-topic-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 3px;
}

.pm-view-lesson {
  border-top: 1px solid var(--border);
  padding: 8px 0;
}

.pm-view-lesson-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--purple);
  padding: 8px 20px 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.pm-view-lesson-title i { font-size: 11px; }

/* Mock Test bento card */
.bento-mock {
  background: linear-gradient(145deg, #134e4a 0%, #0d9488 60%, #2dd4bf 100%);
  color: var(--white);
}

.bento-mock::after {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
}

.bento-mock h3 { font-size: 24px; font-weight: 800; }
.bento-mock p { font-size: 14px; opacity: 0.8; }
.bento-mock .bento-arrow { background: rgba(255,255,255,0.2); color: var(--white); }
.bento-mock .bento-arrow:hover { background: rgba(255,255,255,0.35); }
.bento-mock-count { font-size: 13px; margin-top: 6px; opacity: 0.7; }

/* Mock Test (PDF-based) bento card */
.bento-mocktest {
  background: linear-gradient(145deg, #312e81 0%, #4338ca 50%, #6366f1 100%);
  color: var(--white);
  grid-column: span 2;
}

.bento-mocktest::after {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
}

.bento-mocktest h3 { font-size: 24px; font-weight: 800; }
.bento-mocktest p { font-size: 14px; opacity: 0.8; }
.bento-mocktest .bento-arrow { background: rgba(255,255,255,0.2); color: var(--white); }
.bento-mocktest .bento-arrow:hover { background: rgba(255,255,255,0.35); }
.bento-mocktest-count { font-size: 13px; margin-top: 6px; opacity: 0.7; }

/* Mock Test (PDF-based) View */
.mocktest-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 24px;
}

/* Mock Test Upload UI */
.mocktest-upload-area { margin-bottom: 24px; }

.mocktest-upload-box {
  border: 2px dashed var(--border);
  border-radius: 16px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--white);
}
.mocktest-upload-box:hover,
.mocktest-upload-box.dragover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.04);
}

.mocktest-uploading,
.mocktest-upload-success,
.mocktest-upload-error {
  padding: 12px 16px;
  border-radius: 10px;
  margin-top: 12px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.mocktest-uploading { background: #eff6ff; color: #3b82f6; }
.mocktest-upload-success { background: #f0fdf4; color: #16a34a; }
.mocktest-upload-error { background: #fef2f2; color: #dc2626; }

.mocktest-list-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.mocktest-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--border);
  margin-bottom: 8px;
}

.mocktest-item-title { font-weight: 600; font-size: 15px; }
.mocktest-item-meta { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

.mocktest-badge-pending {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 20px;
  background: #fef3c7;
  color: #92400e;
  font-weight: 500;
}

/* Mock Test Picker */
.mock-picker-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 24px;
}

.mock-picker-intro {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 20px;
}

.mock-picker-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--white);
  border-radius: 14px;
  padding: 18px 20px;
  margin-bottom: 12px;
  box-shadow: 0 1px 4px rgba(45,43,85,0.06);
  cursor: pointer;
  transition: all 0.15s;
  border-left: 4px solid #0d9488;
}

.mock-picker-item:hover { box-shadow: var(--shadow-lg); transform: translateY(-1px); }

.mock-picker-info { flex: 1; }

.mock-picker-title {
  font-weight: 600;
  font-size: 16px;
  color: var(--text);
  margin-bottom: 3px;
}

.mock-picker-meta {
  font-size: 13px;
  color: var(--text-muted);
}

/* Mock Test Review */
.mock-review-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 24px;
}

.mock-result-summary {
  text-align: center;
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.mock-review-heading {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}

.mock-review-item {
  background: var(--white);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 10px;
  box-shadow: 0 1px 4px rgba(45,43,85,0.04);
  border-left: 4px solid var(--border);
}

.mock-review-item.correct { border-left-color: #22c55e; }
.mock-review-item.wrong { border-left-color: var(--danger); }

.mock-review-q {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 8px;
}

.mock-review-num {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 24px;
}

.mock-review-badge {
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.mock-review-badge.correct { color: #22c55e; }
.mock-review-badge.wrong { color: var(--danger); }

.mock-review-options {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
  padding-left: 32px;
}

.mock-review-opt {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  background: rgba(224,218,240,0.2);
}

.mock-review-opt.correct { background: rgba(34,197,94,0.1); font-weight: 500; }
.mock-review-opt.wrong { background: rgba(239,68,68,0.08); text-decoration: line-through; opacity: 0.7; }

.mock-review-mark {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
}

.mock-review-opt.correct .mock-review-mark { background: #22c55e; color: var(--white); }

.mock-review-detail {
  font-size: 14px;
  color: var(--text-light);
  padding-left: 32px;
}

.mock-review-why {
  font-size: 13px;
  color: var(--text-muted);
  padding: 8px 12px;
  margin-top: 6px;
  margin-left: 32px;
  background: var(--purple-bg);
  border-radius: 8px;
}

/* Mock test stimulus (context, tables, figures) */
.mt-stim {
  background: #f8f7fc;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 16px;
  font-size: 14px;
  line-height: 1.5;
}
.mt-stim p { margin: 0 0 10px; color: var(--text); }
.mt-stim p:last-child { margin-bottom: 0; }
.mt-table-wrap { overflow-x: auto; margin: 6px 0; }
.mt-table { border-collapse: collapse; width: 100%; font-size: 13px; background: var(--white); }
.mt-table th, .mt-table td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.mt-table th { background: #eeebf8; font-weight: 600; }
.mt-fig { display: block; max-width: 100%; max-height: 360px; margin: 8px auto 0; border-radius: 8px; background: #fff; }

/* ===== Home: subjects first ===== */
.home-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 4px 0 14px;
}
.home-section-head h2 { font-size: 20px; font-weight: 800; color: var(--text); }
.home-section-head + .home-section-head,
.subject-grid + .home-section-head { margin-top: 30px; }

.subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.subject-card {
  border-radius: 20px;
  padding: 22px 24px;
  color: var(--white);
  cursor: pointer;
  min-height: 150px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 10px;
  position: relative;
  overflow: hidden;
  transition: all 0.25s ease;
}
.subject-card::after {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 150px; height: 150px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
}
.subject-card:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(45,43,85,0.2); }
.subject-card-top { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; position: relative; }
.subject-card h3 { font-size: 24px; font-weight: 800; line-height: 1.15; }
.subject-card-pct { font-size: 22px; font-weight: 800; opacity: 0.9; }
.subject-card-bar { height: 6px; border-radius: 6px; background: rgba(255,255,255,0.25); overflow: hidden; position: relative; }
.subject-card-bar > div { height: 100%; background: var(--white); border-radius: 6px; }
.subject-card-meta { font-size: 13px; opacity: 0.85; position: relative; }
.subject-card-miss { color: #fecaca; font-weight: 600; }
.subject-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
  background: var(--white);
  border-radius: 16px;
}
.subject-empty i { font-size: 32px; margin-bottom: 10px; display: block; }

/* compact tool cards */
.bento-grid-tools {
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  grid-auto-rows: minmax(120px, auto);
}
.bento-grid-tools .bento-card { padding: 18px 20px; border-radius: 16px; }
.bento-grid-tools .bento-card h3 { font-size: 17px; margin-bottom: 2px; }
.bento-grid-tools .bento-icon { width: 36px; height: 36px; font-size: 15px; margin-bottom: 8px; }
.bento-grid-tools .bento-arrow { width: 32px; height: 32px; font-size: 12px; margin-top: 10px; }
.bento-grid-tools .bento-mistake::before { display: none; }
.bento-grid-tools .bento-mocktest { grid-column: auto; }

/* Subject page */
.subject-container { max-width: 760px; margin: 0 auto; padding: 24px; }
.subject-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}
.subject-stat {
  background: var(--white);
  border-radius: 14px;
  padding: 14px 12px;
  text-align: center;
  border: 1px solid var(--border);
}
.subject-stat b { display: block; font-size: 22px; font-weight: 800; color: var(--text); }
.subject-stat span { font-size: 12px; color: var(--text-muted); }
.subject-stat.warn b { color: #dc2626; }

.subject-actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 26px;
}
.subject-action {
  border: none;
  border-radius: 14px;
  padding: 14px 14px 12px;
  text-align: left;
  cursor: pointer;
  color: var(--white);
  font-family: inherit;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.subject-action:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(45,43,85,0.18); }
.subject-action:disabled { opacity: 0.45; cursor: default; }
.subject-action i { font-size: 16px; margin-bottom: 6px; opacity: 0.9; }
.subject-action span { font-size: 15px; font-weight: 700; }
.subject-action small { font-size: 12px; opacity: 0.8; }
.sa-mistake { background: linear-gradient(145deg, #5b2d6e, #7c3aed); }
.sa-quiz { background: linear-gradient(145deg, #0d9488, #2dd4bf); }
.sa-mock { background: linear-gradient(145deg, #4338ca, #6366f1); }
.subject-section-title { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 12px; }

.mocktest-subject-row { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.mocktest-subject-row label { font-size: 13px; font-weight: 600; color: var(--text-light); }
.mocktest-subject-row input {
  flex: 1; padding: 9px 12px; border: 1.5px solid var(--border); border-radius: 10px;
  font: inherit; font-size: 14px; background: var(--white);
}
.mocktest-subject-row input:focus { outline: none; border-color: var(--purple); }

@media (max-width: 600px) {
  .subject-stats { grid-template-columns: repeat(2, 1fr); }
  .subject-actions { grid-template-columns: 1fr; }
}

/* =====================================================================
   SCRAPBOOK THEME — cream paper, burgundy & brown ink, powder-blue stripes
   ===================================================================== */
:root {
  --purple-deep: #4a2a1a;
  --purple: #8e1b2f;
  --purple-mid: #a8344a;
  --purple-light: #d9a7af;
  --purple-bg: #f4e7e3;
  --lavender: #e9dccb;
  --cream: #fbf6ee;
  --pink: #f4e7e3;
  --bg: #f7f1e6;
  --text: #3b2216;
  --text-light: #6b4a3a;
  --text-muted: #a08c7d;
  --white: #fffdf8;
  --border: #e4d6c3;
  --accent-dark: #6e1323;
  --brown: #4a2a1a;
  --blue: #bcd3ee;
  --blue-deep: #6f93c4;
  --butter: #f6eec0;
  --serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
}

body {
  background-color: var(--bg);
  background-image: radial-gradient(rgba(74,42,26,0.035) 1px, transparent 1px);
  background-size: 4px 4px;
}

/* headings in serif */
h1, h2, h3,
.nav-title, .home-section-head h2, .subject-card h3, .bento-card h3,
.learn-card h2, .subject-section-title, .mocktest-list-title,
.quiz-result-score, .subject-stat b, .viewer-header h2, .study-header h2 {
  font-family: var(--serif);
  font-weight: 400 !important;
  letter-spacing: 0.1px;
}

/* nav: striped awning strip under a cream bar */
.top-nav {
  background: var(--blue);
  border-bottom: 1px solid #9fb8d8;
}
.nav-title { font-size: 26px; font-style: italic; color: var(--brown); }
.nav-logo { color: var(--purple) !important; }
.nav-search input { background: var(--white); border-color: #9fb8d8; }
.nav-icon-btn { background: rgba(255,253,248,0.7); color: var(--brown); }
.nav-icon-btn:hover { background: var(--white); }

/* login */
.login-container {
  background:
    repeating-linear-gradient(90deg, var(--blue) 0 22px, #dce8f6 22px 44px);
}
#login-form, .login-logo {
  background: var(--white);
  border-radius: 4px;
  box-shadow: 0 10px 30px rgba(74,42,26,0.18);
}
.login-logo { padding: 28px 40px 18px; margin-bottom: 0; transform: rotate(-1.5deg); }
.login-logo h1 { font-family: var(--serif); font-style: italic; font-size: 40px; font-weight: 400; color: var(--brown); }
.login-logo i { color: var(--purple); }
#login-form { padding: 28px; width: 100%; max-width: 360px; margin-top: -6px; }

/* buttons: pill shaped, burgundy / brown */
.btn, .learn-btn-next, .learn-btn-back, .learn-btn-check { border-radius: 999px !important; }
.btn-primary, .learn-btn-next, .learn-btn-check { background: var(--purple); color: #fffdf8; }
.btn-primary:hover, .learn-btn-next:hover { background: var(--accent-dark); }
.btn-outline { color: var(--brown); border-color: var(--brown); }
.btn-outline:hover { background: var(--brown); }
.btn-ghost { color: var(--brown); }

/* headers */
.viewer-header, .study-header, .browse-header {
  background: rgba(255,253,248,0.85);
  border-bottom: 1px dashed #cdb89c;
}
.viewer-header h2, .study-header h2 { font-size: 26px; color: var(--brown); }

/* ---------- Home ---------- */
.home-bento { max-width: 1100px; margin: 0 auto; }
.home-section-head h2 { font-size: 38px; color: var(--brown); }
.home-section-head h2::after {
  content: ' ✦';
  font-size: 18px;
  color: var(--purple);
  vertical-align: middle;
}

/* subject folders */
.subject-grid { gap: 34px 22px; padding-top: 18px; }
.subject-card {
  background: var(--folder, #e9dccb) !important;
  color: var(--ink, #4a2a1a);
  border-radius: 0 10px 10px 10px;
  overflow: visible;
  box-shadow: 0 6px 0 rgba(74,42,26,0.08), 0 10px 24px rgba(74,42,26,0.10);
  min-height: 160px;
  padding-top: 30px;
}
.subject-card::before {
  content: '';
  position: absolute;
  top: -16px; left: 0;
  width: 42%; height: 18px;
  background: var(--folder, #e9dccb);
  border-radius: 10px 14px 0 0;
}
.subject-card::after {
  content: '';
  top: -26px; right: 22px; left: auto;
  width: 46%; height: 42px;
  border-radius: 3px;
  background: var(--white);
  box-shadow: 0 2px 6px rgba(74,42,26,0.12);
  transform: rotate(3deg);
  z-index: -1;
}
.subject-card:hover { transform: translateY(-4px) rotate(-0.6deg); }
.subject-card-tab {
  position: absolute; top: -12px; left: 14px;
  font-size: 10px; letter-spacing: 1px; text-transform: uppercase; opacity: 0.7;
}
.subject-card-doodle {
  position: absolute; right: 26px; top: 26px;
  font-size: 30px; opacity: 0.55; transform: rotate(-18deg);
}
.subject-card h3 { font-size: 32px; }
.subject-card-pct { font-family: var(--serif); font-style: italic; font-size: 26px; font-weight: 400; }
.subject-card-bar { background: rgba(74,42,26,0.15); }
.subject-card-bar > div { background: var(--ink, #4a2a1a); }
.subject-card-miss { color: var(--purple); }
.subject-empty { background: var(--white); border: 1px dashed #cdb89c; border-radius: 4px; }

/* tool cards = sticky notes */
.bento-grid-tools { gap: 18px; }
.bento-grid-tools .bento-card {
  border-radius: 2px !important;
  box-shadow: 0 8px 18px rgba(74,42,26,0.14);
  background: var(--white) !important;
  color: var(--brown) !important;
}
.bento-grid-tools .bento-card::after,
.bento-grid-tools .bento-card::before { display: none; }
.bento-grid-tools .bento-card:nth-child(6n+1) { background: #efe3e0 !important; transform: rotate(-1.4deg); }
.bento-grid-tools .bento-card:nth-child(6n+2) { background: var(--blue) !important; transform: rotate(1deg); }
.bento-grid-tools .bento-card:nth-child(6n+3) { background: var(--butter) !important; transform: rotate(-0.6deg); }
.bento-grid-tools .bento-card:nth-child(6n+4) { background: #d8c3a5 !important; transform: rotate(1.3deg); }
.bento-grid-tools .bento-card:nth-child(6n+5) { background: var(--white) !important; transform: rotate(-1deg); }
.bento-grid-tools .bento-card:hover { transform: rotate(0) translateY(-3px); }
.bento-grid-tools .bento-card h3 { font-size: 24px; font-style: italic; }
.bento-grid-tools .bento-card p,
.bento-grid-tools .bento-mistake-count,
.bento-grid-tools .bento-mock-count,
.bento-grid-tools .bento-mocktest-count { color: var(--text-light) !important; opacity: 1; }
.bento-grid-tools .bento-mistake-count.has-count { color: var(--purple) !important; }
.bento-grid-tools .bento-icon { background: rgba(74,42,26,0.08) !important; color: var(--brown) !important; }
.bento-grid-tools .bento-arrow { background: var(--brown) !important; color: #fffdf8 !important; }

/* ---------- Subject page ---------- */
.subject-stat {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 2px;
  box-shadow: 0 3px 8px rgba(74,42,26,0.06);
}
.subject-stat b { font-size: 34px; color: var(--brown); }
.subject-stat.warn b { color: var(--purple); }
.subject-stat:nth-child(odd) { transform: rotate(-0.8deg); }
.subject-stat:nth-child(even) { transform: rotate(0.8deg); }
.subject-action {
  border-radius: 0 10px 10px 10px;
  position: relative;
  margin-top: 10px;
  color: var(--brown);
}
.subject-action::before {
  content: '';
  position: absolute; top: -10px; left: 0;
  width: 45%; height: 12px;
  background: inherit;
  border-radius: 8px 10px 0 0;
}
.subject-action span { font-family: var(--serif); font-size: 22px; font-weight: 400; }
.sa-mistake { background: #efe3e0; }
.sa-quiz { background: var(--blue); }
.sa-mock { background: #d8c3a5; }
.subject-section-title { font-size: 28px; color: var(--brown); }

/* lesson rows = index cards */
.lesson-row {
  border-radius: 2px;
  border: 1px solid var(--border);
  background:
    linear-gradient(var(--white) 0 0) padding-box;
  box-shadow: 0 3px 8px rgba(74,42,26,0.06);
  border-left: 4px solid var(--purple);
}
.lesson-row-title { font-family: var(--serif); font-size: 21px; font-weight: 400; color: var(--brown); }
.lesson-row-main:hover { background: #fbf3e8; }
.lesson-ring circle[stroke="#22c55e"] { stroke: var(--purple); }
.lesson-ring circle[stroke="#e0daf0"] { stroke: #eadfcd; }
.btn-icon-sm { border-color: var(--border); color: var(--text-light); }

/* ---------- Study / quiz cards ---------- */
.learn-card {
  background: var(--white);
  border-radius: 3px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 30px rgba(74,42,26,0.10);
}
.learn-card h2 { font-size: 30px; color: var(--brown); line-height: 1.2; }
.learn-badge.read { background: var(--blue); color: #2f3f5c; }
.learn-badge.question { background: var(--butter); color: #5a4410; }
.learn-seg { background: #eadfcd; }
.learn-seg.done { background: var(--purple); }
.learn-seg.active { background: var(--blue-deep); }
.learn-q-opt { border-radius: 999px; border-color: var(--border); background: #fffaf2; }
.learn-q-opt:hover { border-color: var(--blue-deep); background: #eef4fb; }
.learn-q-opt.selected { border-color: var(--purple); background: #f8e9ea; }
.learn-q-opt.selected .learn-q-mark { background: var(--purple); border-color: var(--purple); color: #fffdf8; }
.mistakes-context { color: var(--purple) !important; }
.mt-stim { background: #fbf3e8; border-color: var(--border); border-radius: 3px; }
.mt-table th { background: var(--blue); color: #2f3f5c; }

/* results: postage-stamp edge */
.mock-result-summary, .quiz-result-card {
  background: var(--white);
  border-radius: 0 !important;
  -webkit-mask: radial-gradient(circle 7px at 7px 7px, transparent 98%, #000) -7px -7px / 18px 18px;
          mask: radial-gradient(circle 7px at 7px 7px, transparent 98%, #000) -7px -7px / 18px 18px;
  padding: 34px 24px !important;
}
.quiz-result-score { color: var(--purple) !important; font-size: 72px !important; font-style: italic; }
.mock-review-item { border-radius: 3px; background: var(--white); }

/* misc surfaces */
.mocktest-upload-box { border-radius: 4px; border-color: #cdb89c; background: #fffaf2; }
.mocktest-upload-box:hover, .mocktest-upload-box.dragover { border-color: var(--purple); background: #f8e9ea; }
.mocktest-item, .mock-picker-item, .pm-view-topic, .progress-item, .admin-card {
  border-radius: 3px !important;
  background: var(--white);
}
.modal-content { border-radius: 4px; background: var(--white); }
input, select, textarea { accent-color: var(--purple); }

/* Choose-subjects picker */
.home-section-actions { display: flex; gap: 8px; align-items: center; }
.subject-picker-hint { font-size: 13px; color: var(--text-light); margin: 0 0 14px; line-height: 1.5; }
.subject-picker-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; max-height: 50vh; overflow-y: auto; }
.subject-picker-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  background: #fffaf2;
  cursor: pointer;
  font-size: 15px;
}
.subject-picker-item:has(input:checked) { border-color: var(--purple); background: #f8e9ea; }
.subject-picker-item input { width: 18px; height: 18px; accent-color: var(--purple); }
.subject-picker-item span { font-family: var(--serif); font-size: 20px; color: var(--brown); }

/* All Subjects: postage stamps */
.browse-filters { display: none; }
.browse-tiles-hint { max-width: 900px; margin: 0 auto 18px; color: var(--text-light); font-size: 14px; }
.browse-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 30px 26px;
  max-width: 900px;
  margin: 0 auto 40px;
  padding: 10px 6px;
}
.browse-tile {
  position: relative;
  cursor: pointer;
  transform: rotate(var(--tilt, 0deg));
  filter: drop-shadow(0 6px 10px rgba(74,42,26,0.18));
  transition: transform 0.2s, filter 0.2s;
}
.browse-tile:hover { transform: rotate(0deg) translateY(-4px); filter: drop-shadow(0 10px 16px rgba(74,42,26,0.24)); }
.stamp-paper {
  background: #fffdf8;
  padding: 12px;
  aspect-ratio: 4 / 5;
  /* perforated edge */
  -webkit-mask:
    radial-gradient(circle 6px at 50% 50%, transparent 98%, #000) 0 0 / 16px 16px round,
    linear-gradient(#000 0 0) 8px 8px / calc(100% - 16px) calc(100% - 16px) no-repeat;
          mask:
    radial-gradient(circle 6px at 50% 50%, transparent 98%, #000) 0 0 / 16px 16px round,
    linear-gradient(#000 0 0) 8px 8px / calc(100% - 16px) calc(100% - 16px) no-repeat;
}
.stamp-art {
  position: relative;
  height: 100%;
  background: var(--folder);
  color: var(--ink);
  border: 1.5px solid rgba(74,42,26,0.25);
  outline: 4px solid #fffdf8;
  outline-offset: -8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 6px;
  padding: 18px 10px;
  overflow: hidden;
  transition: filter 0.2s;
}
.browse-tile:not(.on) .stamp-art { filter: grayscale(0.7) opacity(0.75); }
.stamp-no {
  position: absolute; top: 12px; right: 14px;
  font-family: var(--serif); font-style: italic; font-size: 15px; opacity: 0.75;
}
.stamp-icon { font-size: 34px; opacity: 0.55; transform: rotate(-14deg); margin-bottom: 4px; }
.stamp-art h3 { font-family: var(--serif); font-weight: 400; font-size: 28px; line-height: 1.05; }
.stamp-meta { font-size: 12px; letter-spacing: 0.5px; text-transform: uppercase; opacity: 0.75; }

/* postmark toggle */
.browse-tile-check {
  position: absolute; top: -14px; left: -16px;
  width: 74px; height: 74px;
  border-radius: 50%;
  border: 2px dashed rgba(74,42,26,0.35);
  background: rgba(255,253,248,0.85);
  color: rgba(74,42,26,0.35);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transform: rotate(-12deg);
  transition: all 0.2s;
  font-size: 18px;
  padding: 0;
}
.postmark-ring {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  opacity: 0;
  pointer-events: none;
}
.postmark-ring text { font-size: 11.5px; font-weight: 700; letter-spacing: 1.6px; fill: currentColor; }
.browse-tile-check:hover { border-color: var(--purple); color: var(--purple); }
.browse-tile.on .browse-tile-check {
  background: transparent;
  border: 3px double rgba(142,27,47,0.85);
  color: rgba(142,27,47,0.9);
  transform: rotate(-14deg) scale(1.02);
  box-shadow: inset 0 0 0 6px transparent;
}
.browse-tile.on .browse-tile-check .postmark-ring { opacity: 0.9; color: rgba(142,27,47,0.9); }
.browse-tile.on .browse-tile-check i { font-size: 24px; }
.browse-tile.on .browse-tile-check::after {
  /* cancellation wave lines */
  content: '';
  position: absolute; left: 60px; top: 30px;
  width: 90px; height: 16px;
  background: repeating-linear-gradient(180deg, rgba(142,27,47,0.6) 0 2px, transparent 2px 6px);
  -webkit-mask: radial-gradient(10px 6px at 50% 0, transparent 70%, #000 72%) 0 0 / 20px 16px;
          mask: radial-gradient(10px 6px at 50% 0, transparent 70%, #000 72%) 0 0 / 20px 16px;
  pointer-events: none;
}
.browse-units-title { max-width: 700px; margin: 0 auto 12px; }

/* ===== invite signup ===== */
#signup-form {
  background: var(--white); border-radius: 4px; box-shadow: 0 10px 30px rgba(74,42,26,0.18);
  padding: 28px; width: 100%; max-width: 360px; margin-top: -6px;
}
.auth-switch { margin-top: 14px; text-align: center; font-size: 13px; color: var(--text-muted); }
.auth-switch a { color: var(--purple); font-weight: 600; }
.label-optional { font-weight: 400; color: var(--text-muted); font-size: 12px; }
#signup-code { letter-spacing: 2px; font-family: ui-monospace, monospace; }

.invite-hint { font-size: 13px; color: var(--text-muted); margin: -6px 0 14px; }
.invite-create { display: flex; gap: 10px; margin-bottom: 16px; }
.invite-create input { flex: 1; }
.invite-code { font-family: ui-monospace, monospace; letter-spacing: 2px; font-size: 15px !important; }
.invite-row .user-actions { align-items: center; }
.invite-row.used { opacity: 0.6; }
.invite-badge {
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px;
  padding: 3px 10px; border-radius: 999px; background: var(--butter); color: var(--brown);
}
.invite-badge.used { background: #e6e0d8; color: var(--text-muted); }
.invite-empty { font-size: 13px; color: var(--text-muted); }
@media (max-width: 640px) { .invite-create { flex-direction: column; } }