@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css');
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
  --bg-base: #07080d;
  --bg-elevated: #0f111a;
  --bg-card: rgba(20, 23, 36, 0.78);
  --bg-card-hover: rgba(28, 32, 50, 0.92);
  --bg-glass: rgba(15, 17, 26, 0.72);
  --bg-input: rgba(255, 255, 255, 0.045);
  --border-subtle: rgba(255, 255, 255, 0.075);
  --border-strong: rgba(255, 255, 255, 0.14);
  --border-accent: rgba(99, 102, 241, 0.45);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-primary: #6366f1;
  --accent-secondary: #818cf8;
  --accent-cyan: #38bdf8;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-violet: #a855f7;
  --gradient-brand: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #38bdf8 100%);
  --gradient-emerald: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-amber: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --shadow-glow: 0 8px 32px -4px rgba(99, 102, 241, 0.28);
  --shadow-card: 0 12px 32px -8px rgba(0, 0, 0, 0.45);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --font-sans: 'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: 'Plus Jakarta Sans', 'Pretendard Variable', sans-serif;
}

[data-theme="light"] {
  --bg-base: #f4f6fb;
  --bg-elevated: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: rgba(255, 255, 255, 1);
  --bg-glass: rgba(255, 255, 255, 0.82);
  --bg-input: rgba(15, 23, 42, 0.045);
  --border-subtle: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.15);
  --border-accent: rgba(99, 102, 241, 0.45);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --shadow-glow: 0 8px 28px -4px rgba(99, 102, 241, 0.22);
  --shadow-card: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  min-height: 100%;
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: -0.015em;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
}

body::before {
  content: '';
  position: fixed;
  top: -25vh;
  left: -15vw;
  width: 70vw;
  height: 70vh;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.14) 0%, rgba(56, 189, 248, 0.05) 45%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  bottom: -25vh;
  right: -15vw;
  width: 65vw;
  height: 65vh;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.11) 0%, rgba(16, 185, 129, 0.04) 45%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* App Shell */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 16px 104px;
  min-height: 100vh;
}

/* Header */
.top-header {
  position: sticky;
  top: 12px;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 16px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  margin-bottom: 18px;
}

.header-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
}

.header-bottom-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  flex: 1;
}

.brand-text-wrap {
  min-width: 0;
  flex: 1;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
  flex-shrink: 0;
}

.brand-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: nowrap;
  white-space: nowrap;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 1px;
}

.role-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}

.role-pill.admin {
  background: rgba(168, 85, 247, 0.16);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.35);
}

.role-pill.teacher {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.35);
}

[data-theme="light"] .role-pill.admin {
  background: rgba(147, 51, 234, 0.12);
  color: #7e22ce;
}

[data-theme="light"] .role-pill.teacher {
  background: rgba(2, 132, 199, 0.12);
  color: #0369a1;
}

.header-quick-icons {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.sync-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.sync-indicator:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.sync-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.sync-dot.online {
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-dot 2s infinite;
}

.sync-dot.connecting {
  background: var(--accent-amber);
  box-shadow: 0 0 10px var(--accent-amber);
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.28); opacity: 0.7; }
}

.icon-btn {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-input);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s ease;
  flex-shrink: 0;
}

.icon-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
}

/* Bento Grid & Cards */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.bento-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, border-color 0.2s ease;
  position: relative;
  overflow: hidden;
}

.bento-card:hover {
  border-color: var(--border-strong);
}

.bento-card.accent-glow {
  border-color: var(--border-accent);
  background: linear-gradient(160deg, rgba(99, 102, 241, 0.14) 0%, var(--bg-card) 65%);
}

.metric-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.metric-value {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.metric-sub {
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Toolbar & Date Bar */
.control-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin-bottom: 18px;
}

.date-selector {
  display: flex;
  align-items: center;
  gap: 8px;
}

.date-input {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  padding: 8px 13px;
  border-radius: var(--radius-sm);
  outline: none;
  cursor: pointer;
}

.date-input:focus {
  border-color: var(--accent-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #ffffff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.06);
}

.btn-secondary {
  background: var(--bg-input);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover {
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
}

.btn-emerald {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.35);
  color: #34d399;
}

[data-theme="light"] .btn-emerald {
  color: #059669;
}

.btn-emerald:hover {
  background: rgba(16, 185, 129, 0.25);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.12);
  border-color: rgba(244, 63, 94, 0.3);
  color: #fb7185;
}

.btn-sm {
  padding: 6px 11px;
  font-size: 12px;
  border-radius: 8px;
}

/* Student Check Matrix Cards */
.student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 14px;
}

.student-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.2s ease;
  position: relative;
}

.student-card.checked-in {
  border-color: rgba(16, 185, 129, 0.38);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.06) 0%, var(--bg-card) 45%);
}

.student-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.student-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  color: #fff;
  flex-shrink: 0;
  background: linear-gradient(135deg, #6366f1, #38bdf8);
}

.student-name {
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

.student-meta {
  font-size: 12px;
  color: var(--text-secondary);
}

.talent-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 11px;
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.14);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #fbbf24;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
}

[data-theme="light"] .talent-badge {
  color: #b45309;
  background: rgba(245, 158, 11, 0.12);
}

/* 4-Chip Check Matrix */
.check-matrix {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.check-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  user-select: none;
  transition: all 0.16s cubic-bezier(0.22, 1, 0.36, 1);
}

.check-chip:hover {
  border-color: var(--border-strong);
}

.check-chip:active {
  transform: scale(0.97);
}

.check-chip .chip-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.check-chip .chip-pts {
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
}

.check-chip.active.attendance {
  background: rgba(16, 185, 129, 0.16);
  border-color: rgba(16, 185, 129, 0.5);
}
.check-chip.active.attendance .chip-label { color: #34d399; }
.check-chip.active.attendance .chip-pts { background: rgba(16, 185, 129, 0.25); color: #ecfdf5; }

.check-chip.active.sermon {
  background: rgba(99, 102, 241, 0.18);
  border-color: rgba(99, 102, 241, 0.55);
}
.check-chip.active.sermon .chip-label { color: #818cf8; }
.check-chip.active.sermon .chip-pts { background: rgba(99, 102, 241, 0.3); color: #eef2ff; }

.check-chip.active.quiz {
  background: rgba(56, 189, 248, 0.16);
  border-color: rgba(56, 189, 248, 0.5);
}
.check-chip.active.quiz .chip-label { color: #38bdf8; }
.check-chip.active.quiz .chip-pts { background: rgba(56, 189, 248, 0.28); color: #f0f9ff; }

.check-chip.active.recitation {
  background: rgba(168, 85, 247, 0.17);
  border-color: rgba(168, 85, 247, 0.5);
}
.check-chip.active.recitation .chip-label { color: #c084fc; }
.check-chip.active.recitation .chip-pts { background: rgba(168, 85, 247, 0.28); color: #faf5ff; }

.check-chip.active.evangelism {
  background: rgba(244, 63, 94, 0.17);
  border-color: rgba(244, 63, 94, 0.52);
}
.check-chip.active.evangelism .chip-label { color: #fb7185; }
.check-chip.active.evangelism .chip-pts { background: rgba(244, 63, 94, 0.28); color: #fff1f2; }

.check-chip.active.climbing {
  background: rgba(245, 158, 11, 0.17);
  border-color: rgba(245, 158, 11, 0.52);
}
.check-chip.active.climbing .chip-label { color: #fbbf24; }
.check-chip.active.climbing .chip-pts { background: rgba(245, 158, 11, 0.28); color: #fffbeb; }

[data-theme="light"] .check-chip.active.attendance .chip-label { color: #047857; }
[data-theme="light"] .check-chip.active.sermon .chip-label { color: #4338ca; }
[data-theme="light"] .check-chip.active.quiz .chip-label { color: #0369a1; }
[data-theme="light"] .check-chip.active.recitation .chip-label { color: #7e22ce; }
[data-theme="light"] .check-chip.active.evangelism .chip-label { color: #be123c; }
[data-theme="light"] .check-chip.active.climbing .chip-label { color: #b45309; }

.student-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
}

.bonus-control {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}

.bonus-btn {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-input);
  color: var(--text-primary);
  font-weight: 700;
  cursor: pointer;
}

.bonus-btn:hover {
  border-color: var(--accent-amber);
  color: var(--accent-amber);
}

/* Visitation Feed & Cards */
.feed-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.visit-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  transition: all 0.2s ease;
}

.visit-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.visit-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.tag.urgent {
  background: rgba(244, 63, 94, 0.15);
  border-color: rgba(244, 63, 94, 0.4);
  color: #fb7185;
}

.tag.class-tag {
  background: rgba(99, 102, 241, 0.14);
  border-color: rgba(99, 102, 241, 0.35);
  color: var(--accent-secondary);
}

.visit-body {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-primary);
  white-space: pre-wrap;
  margin-bottom: 12px;
}

.visit-prayer {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(56, 189, 248, 0.07);
  border-left: 3px solid var(--accent-cyan);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

/* Admin Comments Thread */
.comments-box {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.comment-item {
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(168, 85, 247, 0.09);
  border: 1px solid rgba(168, 85, 247, 0.25);
  font-size: 13px;
}

.comment-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  font-weight: 700;
  color: #c084fc;
  margin-bottom: 4px;
}

[data-theme="light"] .comment-header {
  color: #7e22ce;
}

.comment-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.comment-input-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.comment-placeholder-marquee {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 12px;
  right: 12px;
  display: flex;
  align-items: center;
  overflow: hidden;
  pointer-events: none;
  mask-image: linear-gradient(to right, transparent 0%, #000 5%, #000 95%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 5%, #000 95%, transparent 100%);
  transition: opacity 0.15s ease;
}

.comment-placeholder-track {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  color: var(--text-muted);
  font-size: 13px;
  animation: comment-marquee-rtl 11s linear infinite;
}

.comment-placeholder-track span {
  padding-right: 48px;
}

@keyframes comment-marquee-rtl {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

.comment-input-field:focus + .comment-placeholder-marquee,
.comment-input-field:not(:placeholder-shown) + .comment-placeholder-marquee {
  opacity: 0;
  visibility: hidden;
}

/* Inputs & Forms */
.input, .select, .textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 13px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.input:focus, .select:focus, .textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

.textarea {
  min-height: 92px;
  resize: vertical;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.form-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Bottom Navigation Dock */
.bottom-dock {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 45;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  background: var(--bg-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  box-shadow: 0 16px 40px -8px rgba(0, 0, 0, 0.55);
  max-width: calc(100vw - 24px);
  overflow-x: auto;
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  border-radius: 999px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav-tab:hover {
  color: var(--text-primary);
}

.nav-tab.active {
  background: var(--gradient-brand);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

/* Onboarding / Auth Gate */
.auth-wrapper {
  min-height: calc(100vh - 40px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 12px;
}

.auth-card {
  width: 100%;
  max-width: 500px;
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
}

.security-banner {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  font-size: 12.5px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(4, 6, 12, 0.72);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-card {
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.65);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.modal-title {
  font-size: 18px;
  font-weight: 800;
}

/* Toast */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-accent);
  color: var(--text-primary);
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slide-in 0.22s ease;
}

@keyframes slide-in {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Class Overview Cards for Admin */
.class-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 14px;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: var(--bg-input);
  border-radius: 999px;
  overflow: hidden;
  margin: 10px 0;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-brand);
  border-radius: 999px;
  transition: width 0.35s ease;
}

.code-box {
  font-family: monospace;
  font-size: 12px;
  word-break: break-all;
  padding: 12px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  color: var(--accent-cyan);
  user-select: all;
}

[data-theme="light"] .code-box {
  background: rgba(15, 23, 42, 0.06);
  color: #0369a1;
}

@media (max-width: 640px) {
  .top-header {
    padding: 12px 13px;
    gap: 9px;
  }
  .header-bottom-row {
    padding-top: 9px;
    gap: 6px;
    flex-wrap: nowrap;
  }
  .sync-indicator {
    padding: 6px 9px;
    font-size: 11px;
    gap: 5px;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .sync-indicator #sync-text-el {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .header-actions {
    gap: 5px;
  }
  .header-action-btn {
    padding: 6px 9px;
    font-size: 11px;
    border-radius: 999px;
    white-space: nowrap;
  }
  .brand-title {
    font-size: 16px;
  }
  .student-grid {
    grid-template-columns: 1fr;
  }
  .nav-tab span.nav-label {
    font-size: 12px;
  }
  .nav-tab {
    padding: 9px 12px;
  }
}