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

/* --- Theme Variables (matching desktop GUI) --- */
[data-theme="dark"] {
  --bg: #1c1814;
  --bg-secondary: #241f1a;
  --bg-card: #2c2520;
  --text: #e8e2da;
  --text-muted: #8a7e75;
  --text-light: #6b6058;
  --accent: #d4943e;
  --accent-hover: #e8a84e;
  --success: #4eca8a;
  --danger: #dc4a4a;
  --border: #3a332c;
  --border-light: #322b25;
  --input-bg: #241f1a;
  --modal-bg: rgba(0,0,0,0.6);
  --hover-bg: rgba(255,255,255,0.04);
  --badge-bg: #d4943e;
  --push-in: #4eca8a;
  --push-in-bg: rgba(78,202,138,0.15);
  --pull-out: #e07a5c;
  --pull-out-bg: rgba(224,122,92,0.15);
  --math: #7b8adf;
  --math-bg: rgba(123,138,223,0.15);
  --sla: #d4943e;
  --sla-bg: rgba(212,148,62,0.15);
  --sel: #ab8bd0;
  --sel-bg: rgba(171,139,208,0.15);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
}

[data-theme="light"] {
  --bg: #f6f3ee;
  --bg-secondary: #faf8f5;
  --bg-card: #ffffff;
  --text: #2c2520;
  --text-muted: #8a7e75;
  --text-light: #b5aa9e;
  --accent: #c4793e;
  --accent-hover: #b06830;
  --success: #3d7a5f;
  --danger: #b94040;
  --border: #e8e2da;
  --border-light: #f0ebe5;
  --input-bg: #faf8f5;
  --modal-bg: rgba(44,37,32,0.3);
  --hover-bg: rgba(44,37,32,0.03);
  --badge-bg: #c4793e;
  --push-in: #3d7a5f;
  --push-in-bg: #e8f4ee;
  --pull-out: #b45a3c;
  --pull-out-bg: #fbeee8;
  --math: #5b6abf;
  --math-bg: #eceef8;
  --sla: #c4793e;
  --sla-bg: #faf0e6;
  --sel: #8b6bb0;
  --sel-bg: #f0eaf6;
  --shadow-sm: 0 1px 3px rgba(44,37,32,0.06);
  --shadow-md: 0 4px 12px rgba(44,37,32,0.08);
}

/* --- Subject Color Aliases --- */
:root {
  --subject-math: var(--math);
  --subject-math-bg: var(--math-bg);
  --subject-sla: var(--sla);
  --subject-sla-bg: var(--sla-bg);
  --subject-sel: var(--sel);
  --subject-sel-bg: var(--sel-bg);
  --subject-ela: var(--accent);
  --subject-ela-bg: rgba(212,148,62,0.10);
}

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

/* --- Login Screen --- */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 20px;
  background: var(--bg);
}

.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--bg-card);
  border-radius: 16px;
  padding: 32px 24px;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.login-logo {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: var(--accent);
  color: white;
  font-size: 24px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.login-card h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.login-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.login-field {
  text-align: left;
  margin-bottom: 16px;
}

.login-field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.login-field input {
  width: 100%;
  padding: 12px 14px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}

.login-field input:focus {
  border-color: var(--accent);
}

.login-field input::placeholder {
  color: var(--text-light);
}

.login-error {
  background: rgba(220,74,74,0.1);
  color: var(--danger);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
  margin-bottom: 16px;
  text-align: left;
}

.login-btn {
  width: 100%;
  padding: 14px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s;
}

.login-btn:hover {
  background: var(--accent-hover);
}

.login-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --- App Shell --- */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
}

/* --- Header --- */
#header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  padding-top: calc(10px + env(safe-area-inset-top, 0px));
}

#header h1 {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.icon-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s;
}

.icon-btn:hover {
  background: var(--hover-bg);
}

/* --- Tab Content --- */
#tab-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px));
}

.tab-pane {
  display: none;
  padding: 16px;
  min-height: 100%;
}

.tab-pane.active {
  display: block;
}

/* --- Bottom Tab Bar --- */
#tab-bar {
  display: flex;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  z-index: 100;
  height: calc(56px + env(safe-area-inset-bottom, 0px));
}

.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px 2px;
  min-width: 0;
  position: relative;
  transition: color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.tab-btn.active {
  color: var(--accent);
}

.tab-btn .tab-icon {
  font-size: 18px;
  line-height: 1;
}

.tab-btn .tab-label {
  font-size: 9px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.tab-btn .tab-badge {
  position: absolute;
  top: 2px;
  right: 50%;
  transform: translateX(12px);
  background: var(--danger);
  color: white;
  font-size: 9px;
  font-weight: 700;
  min-width: 16px;
  height: 16px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

.tab-btn .tab-badge.warning {
  background: #D97706;
}

/* --- Floating Action Button --- */
#fab {
  position: fixed;
  bottom: calc(68px + env(safe-area-inset-bottom, 0px));
  right: 16px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-size: 28px;
  font-weight: 300;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 90;
  transition: transform 0.15s, background 0.15s;
  -webkit-tap-highlight-color: transparent;
}

#fab:active {
  transform: scale(0.92);
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--modal-bg);
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.modal {
  background: var(--bg-card);
  width: 100%;
  max-width: 500px;
  border-radius: 16px 16px 0 0;
  padding: 20px 16px;
  padding-bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  max-height: 85vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

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

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- Forms --- */
.form-group {
  margin-bottom: 14px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 60px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-light);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.btn-primary {
  flex: 1;
  padding: 12px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  flex: 1;
  padding: 12px;
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  cursor: pointer;
}

/* --- Common Components --- */
.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
  font-size: 14px;
}

.loading-state {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
  font-size: 14px;
}

.loading-state::after {
  content: '';
  display: block;
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 12px auto 0;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.card {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 10px;
  box-shadow: var(--shadow-sm);
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
  background: var(--hover-bg);
  color: var(--text-muted);
  margin-right: 4px;
}

.section-count {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 400;
}

/* --- Filter Bar --- */
.filter-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 4px;
}

.filter-btn {
  padding: 7px 14px;
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.15s;
}

.filter-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

/* ============================================================
   LESSON PLANNER SPECIFIC STYLES
   ============================================================ */

/* --- Unit Card --- */
.unit-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s;
}

.unit-card:active {
  border-color: var(--accent);
}

.unit-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.unit-card .unit-meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.unit-card .unit-dates {
  font-size: 12px;
  color: var(--text-muted);
}

/* --- Lesson Card --- */
.lesson-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  border-left: 4px solid var(--accent);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s;
}

.lesson-card.subject-math { border-left-color: var(--subject-math); }
.lesson-card.subject-sla { border-left-color: var(--subject-sla); }
.lesson-card.subject-sel { border-left-color: var(--subject-sel); }
.lesson-card.subject-ela { border-left-color: var(--subject-ela); }

.lesson-card:active {
  border-color: var(--accent);
}

.lesson-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.lesson-card .lesson-meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.lesson-card .lesson-date {
  font-size: 12px;
  color: var(--text-muted);
}

.lesson-card .lesson-duration {
  font-size: 12px;
  color: var(--text-muted);
}

/* --- Step Card (Differentiation Workflow) --- */
.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.15s, opacity 0.15s;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.15s;
}

.step-header:active {
  background: var(--hover-bg);
}

.step-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--border);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-title {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.step-status {
  font-size: 14px;
  flex-shrink: 0;
}

.step-body {
  display: none;
  padding: 0 16px 16px;
  border-top: 1px solid var(--border-light);
}

/* Active step */
.step-card.active {
  border-color: var(--accent);
}

.step-card.active .step-number {
  background: var(--accent);
  color: white;
}

.step-card.active .step-body {
  display: block;
}

/* Completed step */
.step-card.completed .step-header {
  opacity: 0.7;
}

.step-card.completed .step-number {
  background: var(--success);
  color: white;
}

.step-card.completed .step-title {
  color: var(--text-muted);
}

.step-card.completed .step-status {
  color: var(--success);
}

/* Locked step */
.step-card.locked {
  opacity: 0.5;
}

.step-card.locked .step-header {
  cursor: default;
}

/* --- Checklist Item --- */
.checklist-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--input-bg);
  border-radius: 8px;
  margin-bottom: 6px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.1s;
}

.checklist-item:active {
  background: var(--border);
}

.checklist-item.checked {
  opacity: 0.6;
}

.checklist-item.checked .checklist-label {
  text-decoration: line-through;
  color: var(--text-muted);
}

.checklist-check {
  font-size: 16px;
  flex-shrink: 0;
}

.checklist-label {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
}

/* --- Progress Ring --- */
.progress-ring {
  display: inline-block;
}

.progress-ring svg {
  transform: rotate(-90deg);
}

.progress-ring-bg {
  fill: none;
  stroke: var(--border);
}

.progress-ring-fill {
  fill: none;
  stroke: var(--accent);
  stroke-linecap: round;
  transition: stroke-dashoffset 0.4s ease;
}

/* --- Week Grid --- */
.week-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 4px;
}

.week-day {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  min-width: 140px;
}

.week-day.today {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.week-day-header {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-light);
}

.week-day.today .week-day-header {
  color: var(--accent);
}

.week-slot {
  padding: 6px 8px;
  border-radius: 6px;
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.3;
  border-left: 3px solid transparent;
  cursor: pointer;
  transition: background 0.1s;
}

.week-slot:active {
  background: var(--hover-bg);
}

.week-slot.subject-math { border-left-color: var(--subject-math); background: var(--subject-math-bg); }
.week-slot.subject-sla { border-left-color: var(--subject-sla); background: var(--subject-sla-bg); }
.week-slot.subject-sel { border-left-color: var(--subject-sel); background: var(--subject-sel-bg); }
.week-slot.subject-ela { border-left-color: var(--subject-ela); background: var(--subject-ela-bg); }

.week-slot .slot-time {
  font-size: 10px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.week-slot .slot-title {
  font-weight: 600;
}

.week-slot-empty {
  padding: 8px;
  text-align: center;
  font-size: 11px;
  color: var(--text-light);
  font-style: italic;
}

/* --- Goal Match Badge --- */
.goal-match {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
  background: var(--hover-bg);
  color: var(--text-muted);
  margin: 2px 2px 2px 0;
}

.goal-match.auto {
  background: rgba(78,202,138,0.15);
  color: var(--success);
  border: 1px solid rgba(78,202,138,0.3);
}

.goal-match .goal-match-icon {
  font-size: 10px;
}

/* --- Engagement Chip --- */
.engagement-chip {
  display: inline-block;
  padding: 6px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  font-family: inherit;
  color: var(--text);
  cursor: pointer;
  margin: 3px;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.engagement-chip:active {
  transform: scale(0.96);
}

.engagement-chip.selected {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

/* --- Student Needs Card --- */
.student-needs-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 8px;
  box-shadow: var(--shadow-sm);
}

.student-needs-card h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.student-needs-card .needs-goals {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.student-needs-card .needs-level {
  font-size: 12px;
  color: var(--text-muted);
}

.student-needs-card .needs-notes {
  font-size: 12px;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 4px;
}

/* --- Differentiation Group --- */
.diff-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 10px;
}

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

.diff-group-header h4 {
  font-size: 14px;
  font-weight: 600;
}

.diff-group-count {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--hover-bg);
  padding: 2px 8px;
  border-radius: 10px;
}

.diff-group-students {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.diff-group-student {
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
  background: var(--input-bg);
  color: var(--text);
}

.diff-group-plan {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  padding: 8px 10px;
  background: var(--input-bg);
  border-radius: 8px;
}

/* --- Status Tag --- */
.status-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.status-tag.planned {
  background: rgba(59,130,246,0.15);
  color: #3B82F6;
}

.status-tag.ready {
  background: rgba(78,202,138,0.15);
  color: var(--success);
}

.status-tag.taught {
  background: var(--sla-bg);
  color: var(--sla);
}

.status-tag.reflected {
  background: var(--sel-bg);
  color: var(--sel);
}

/* --- Responsive --- */
@media (max-width: 600px) {
  .week-grid {
    grid-template-columns: 1fr;
  }

  .week-day {
    min-width: unset;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

@media (min-width: 500px) {
  .modal {
    border-radius: 16px;
    margin: auto;
    max-height: 90vh;
  }

  .modal-overlay {
    align-items: center;
    padding: 20px;
  }
}

@media (min-width: 768px) {
  .week-grid {
    grid-template-columns: repeat(5, 1fr);
    overflow-x: visible;
  }
}

/* --- File Upload --- */
.file-upload-area {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.file-upload-btn {
  font-size: 13px;
  padding: 8px 14px;
  white-space: nowrap;
}

.file-upload-name {
  font-size: 13px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
}

.file-upload-status {
  width: 100%;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 6px;
  margin-top: 4px;
}

.file-upload-status.loading {
  background: rgba(212, 148, 62, 0.15);
  color: var(--accent);
}

.file-upload-status.success {
  background: rgba(78, 202, 138, 0.15);
  color: var(--success);
}

.file-upload-status.error {
  background: rgba(220, 74, 74, 0.15);
  color: var(--danger);
}

/* --- Print Styles --- */
@media print {
  #header, #tab-bar, #fab, .modal-overlay,
  .filter-bar { display: none !important; }

  #tab-content { padding-bottom: 0; overflow: visible; }
  .tab-pane { padding: 0; }
  body { background: white; color: black; }

  .step-card { break-inside: avoid; }
  .lesson-card { break-inside: avoid; }
  .unit-card { break-inside: avoid; }
}