/* ==========================================================================
   Wabi-Sabi (侘寂) Design System — Modern Oriental Light Mode
   Pre A1 Starters — Teacher Dashboard & Class Hub
   
   Philosophy:
   - Wabi-Sabi (侘寂): The beauty of natural simplicity, warmth and unpretentious craft.
   - Ma (間): Generous, intentional space that lets content breathe.
   - Shibui (渋い): Understated, quiet elegance that calms the mind.
   
   Palette: Warm Washi Paper, Sumi Ink, Matcha/Moss, Terracotta Clay, Indigo.
   Typography: Shippori Mincho, Cormorant Garamond, Plus Jakarta Sans.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,500;0,600;0,700;1,500;1,600&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=Shippori+Mincho:wght@400;500;600;700;800&display=swap');

:root {
  /* ------------------------------------------------------------------------
     1. Natural Japanese Material Palette (Washi & Organic Earth)
     ------------------------------------------------------------------------ */
  --wabi-canvas: #F8F6F0;          /* Warm unbleached Washi paper base */
  --wabi-canvas-subtle: #F2EFE8;   /* Slightly deeper natural linen tone */
  --wabi-surface: #FFFFFF;         /* Pure clean card paper */
  --wabi-surface-warm: #FCFAF6;    /* Soft ambient paper card */
  --wabi-surface-alt: #F1ECE2;     /* Inactive/recessed block */
  
  /* Subtle Ink Borders (delicate fiber strokes) */
  --wabi-border: #E8E3D8;
  --wabi-border-light: rgba(60, 50, 40, 0.07);
  --wabi-border-hover: #D5CEBF;

  /* ------------------------------------------------------------------------
     2. Sumi Ink & Botanical Pigments
     ------------------------------------------------------------------------ */
  --wabi-sumi-ink: #232220;        /* Deep charcoal sumi ink for headings */
  --wabi-sumi-body: #3D3B37;       /* Soft readable charcoal for body */
  --wabi-stone: #78746C;           /* Weathered river stone for secondary info */
  --wabi-ash: #9E9A91;             /* Ash grey for subtle hints and borders */
  
  /* Botanical Accents */
  --wabi-moss: #4A6342;            /* Herbal Matcha / Moss green (Growth & Completion) */
  --wabi-moss-bg: #EDF3EB;         /* Pale moss wash */
  --wabi-moss-border: #BCD0B7;

  --wabi-clay: #B35E38;            /* Bizen Terracotta / Warm Clay (Dates & Emphasis) */
  --wabi-clay-bg: #FAEDE7;         /* Pale terracotta wash */
  --wabi-clay-border: #E5C3B3;

  --wabi-indigo: #395263;          /* Traditional Japanese Indigo (Focus & Buttons) */
  --wabi-indigo-hover: #293E4C;
  --wabi-indigo-bg: #EAF0F4;       /* Pale indigo wash */

  --wabi-bamboo: #C29538;          /* Honeyed Bamboo / Aged Gold (Timers) */
  --wabi-bamboo-bg: #FBF4E6;

  --wabi-persimmon: #A84B3F;       /* Ripe Persimmon / Red Clay (Alerts & Caution) */
  --wabi-persimmon-bg: #FAECEB;
  --wabi-persimmon-border: #E8C1BD;

  /* ------------------------------------------------------------------------
     3. Legacy Variable Compatibility
     ------------------------------------------------------------------------ */
  --primary: var(--wabi-moss);
  --primary-hover: #3D5337;
  --accent: var(--wabi-clay);
  --accent-purple: var(--wabi-indigo);
  --accent-green: var(--wabi-moss);
  --accent-red: var(--wabi-persimmon);
  --panel-bg: var(--wabi-surface);
  --panel-border: var(--wabi-border);
  --card-bg: var(--wabi-surface-warm);
  --text-main: var(--wabi-sumi-ink);
  --text-muted: var(--wabi-stone);
  --label-primary: var(--wabi-sumi-ink);
  --label-secondary: var(--wabi-stone);

  /* ------------------------------------------------------------------------
     4. Typography Stack (Shippori Mincho + Cormorant + Plus Jakarta Sans)
     ------------------------------------------------------------------------ */
  --font-serif: 'Shippori Mincho', 'Cormorant Garamond', Georgia, serif;
  --font-display: 'Shippori Mincho', 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, system-ui, sans-serif;
  --font-latin-serif: 'Cormorant Garamond', Georgia, serif;

  /* ------------------------------------------------------------------------
     5. Organic Radii & Natural Sunlight Shadows
     ------------------------------------------------------------------------ */
  --radius-xl: 16px;
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 5px;
  --radius-pill: 9999px;

  --spring-ease: cubic-bezier(0.25, 1, 0.5, 1);
  --spring-duration: 0.28s;

  /* Soft Ambient Sunlight Shadows */
  --shadow-paper: 0 2px 12px rgba(60, 50, 40, 0.035), 0 1px 3px rgba(60, 50, 40, 0.025);
  --shadow-paper-elevated: 0 8px 28px rgba(60, 50, 40, 0.06), 0 2px 6px rgba(60, 50, 40, 0.03);
  --shadow-subtle: 0 1px 2px rgba(60, 50, 40, 0.04);
}

/* ==========================================================================
   Base Reset & Wabi-Sabi Paper Atmosphere
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Organic Text Selection */
::selection {
  background: #DFE8DD;
  color: var(--wabi-sumi-ink);
}

/* Minimalist Natural Scrollbar */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: var(--wabi-canvas);
}
::-webkit-scrollbar-thumb {
  background: var(--wabi-border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--wabi-stone);
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--wabi-canvas);
  /* Organic Washi Paper Gradient & Delicate Texture */
  background-image: 
    radial-gradient(ellipse 1200px 700px at 50% 0%, #FAF8F3 0%, var(--wabi-canvas) 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.5) 0%, rgba(248, 246, 240, 0) 100%);
  color: var(--wabi-sumi-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.62;
  letter-spacing: -0.005em;
}

/* ==========================================================================
   Header & Serene Paper Navigation (Ma 間)
   ========================================================================== */
header {
  background: rgba(248, 246, 240, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--wabi-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.95rem 2.25rem;
  transition: all var(--spring-duration) var(--spring-ease);
}

.header-container {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
}

/* Brand Identity: Hanko Signature Seal Feel */
.logo-area {
  display: flex;
  align-items: center;
  gap: 0.95rem;
}

.logo-badge {
  background: var(--wabi-moss);
  color: #FFFFFF;
  font-family: var(--font-latin-serif);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  box-shadow: 0 2px 6px rgba(74, 99, 66, 0.2);
}

.logo-badge i {
  width: 14px;
  height: 14px;
  stroke-width: 1.75;
}

.logo-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--wabi-sumi-ink);
}

/* Language Meta-Category Switcher in Header */
.header-lang-switch {
  display: inline-flex;
  align-items: center;
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  padding: 3px;
  border-radius: var(--radius-md);
  margin-left: 0.65rem;
  box-shadow: 0 1px 3px rgba(35, 34, 32, 0.04);
}

.header-lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.32rem 0.75rem;
  border-radius: calc(var(--radius-md) - 2px);
  border: none;
  background: transparent;
  color: var(--wabi-stone);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.header-lang-btn:hover {
  color: var(--wabi-sumi-ink);
  background: var(--wabi-canvas-subtle);
}

.header-lang-btn.active {
  background: var(--wabi-canvas);
  color: var(--wabi-sumi-ink);
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(35, 34, 32, 0.08), 0 0 0 1px var(--wabi-border);
}

.header-lang-btn .lang-flag {
  font-size: 1rem;
  line-height: 1;
}

.header-lang-btn.active[data-lang="chinese"] {
  color: #c92a2a;
}

.header-lang-btn.active[data-lang="english"] {
  color: var(--wabi-indigo);
}

.logo-badge.chinese-mode {
  background: #c92a2a;
  box-shadow: 0 2px 6px rgba(201, 42, 42, 0.28);
}

.academic-filter-lang-group .academic-select {
  border-color: rgba(57, 82, 99, 0.3);
  font-weight: 700;
}

/* Serene Segmented Ribbon Navigation */
nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--wabi-canvas-subtle);
  padding: 0.3rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--wabi-border);
  overflow-x: auto;
  max-width: 100%;
}

.nav-btn {
  background: transparent;
  border: none;
  color: var(--wabi-stone);
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.86rem;
  letter-spacing: -0.005em;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  user-select: none;
  transition: all var(--spring-duration) var(--spring-ease);
}

.nav-btn i {
  width: 16px;
  height: 16px;
  stroke-width: 1.75;
  color: var(--wabi-ash);
  transition: color var(--spring-duration) var(--spring-ease);
}

.nav-btn:hover {
  color: var(--wabi-sumi-ink);
  background: rgba(255, 255, 255, 0.6);
}

.nav-btn:hover i {
  color: var(--wabi-moss);
}

.nav-btn:active {
  transform: scale(0.98);
}

.nav-btn.active {
  color: var(--wabi-sumi-ink);
  background: #FFFFFF;
  font-weight: 700;
  border: 1px solid var(--wabi-border);
  box-shadow: var(--shadow-subtle);
}

.nav-btn.active i {
  color: var(--wabi-moss);
}

/* ==========================================================================
   Main Application Layout (Ma 間: Generous Negative Space)
   ========================================================================== */
main {
  flex: 1;
  max-width: 1320px;
  width: 100%;
  margin: 0 auto;
  padding: 2.75rem 2.25rem;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: wabiFade 0.35s var(--spring-ease);
}

@keyframes wabiFade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   Wabi-Sabi Status Strip & Metrics Cards
   ========================================================================== */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.75rem;
}

.stat-card {
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-paper);
  transition: transform var(--spring-duration) var(--spring-ease), box-shadow var(--spring-duration) var(--spring-ease), border-color var(--spring-duration) var(--spring-ease);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-paper-elevated);
  border-color: var(--wabi-border-hover);
}

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.15rem;
}

.stat-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--wabi-stone);
  font-weight: 600;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.stat-icon-wrapper {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--wabi-canvas);
  border: 1px solid var(--wabi-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--wabi-moss);
}

.stat-icon-wrapper i {
  width: 18px;
  height: 18px;
  stroke-width: 1.75;
}

.stat-value {
  font-family: var(--font-latin-serif);
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--wabi-sumi-ink);
  margin-bottom: 0.45rem;
  line-height: 1.1;
}

.progress-bar-bg {
  background: var(--wabi-canvas-subtle);
  height: 6px;
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-top: 0.85rem;
}

.progress-bar-fill {
  height: 100%;
  background: var(--wabi-moss);
  border-radius: var(--radius-pill);
  width: 0%;
  transition: width 0.7s var(--spring-ease);
}

/* ==========================================================================
   Section Headers & Controls
   ========================================================================== */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--wabi-border-light);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--wabi-sumi-ink);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-title i {
  width: 22px;
  height: 22px;
  stroke-width: 1.75;
  color: var(--wabi-moss);
}

/* Serene Month Filter Pills */
.filter-month-row {
  display: flex;
  gap: 0.4rem;
  background: var(--wabi-surface);
  padding: 0.3rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--wabi-border);
  box-shadow: var(--shadow-subtle);
  flex-wrap: wrap;
}

.filter-month-btn {
  background: transparent;
  border: none;
  color: var(--wabi-stone);
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--spring-duration) var(--spring-ease);
}

.filter-month-btn:hover {
  color: var(--wabi-sumi-ink);
  background: var(--wabi-canvas);
}

.filter-month-btn:active {
  transform: scale(0.98);
}

.filter-month-btn.active {
  color: #FFFFFF;
  background: var(--wabi-moss);
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(74, 99, 66, 0.25);
}

/* ==========================================================================
   Classes Grid & River Pebble Cards
   ========================================================================== */
.classes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1.5rem;
}

.class-card {
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-paper);
  transition: transform var(--spring-duration) var(--spring-ease), box-shadow var(--spring-duration) var(--spring-ease), border-color var(--spring-duration) var(--spring-ease);
}

.class-card:hover {
  transform: translateY(-3px);
  border-color: var(--wabi-border-hover);
  box-shadow: var(--shadow-paper-elevated);
}

.class-card.completed {
  border-color: var(--wabi-moss-border);
  background: var(--wabi-surface-warm);
}

.class-card.completed::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background: var(--wabi-moss);
  border-radius: var(--radius-xl) 0 0 var(--radius-xl);
}

.class-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.95rem;
}

.class-tag {
  background: var(--wabi-canvas-subtle);
  border: 1px solid var(--wabi-border);
  font-family: var(--font-latin-serif);
  font-size: 0.85rem;
  font-style: italic;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  color: var(--wabi-stone);
  font-weight: 600;
}

.class-card-top-actions {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.print-icon-btn {
  background: var(--wabi-canvas);
  border: 1px solid var(--wabi-border);
  color: var(--wabi-stone);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--spring-duration) var(--spring-ease);
}

.print-icon-btn i {
  width: 15px;
  height: 15px;
  stroke-width: 1.75;
}

.print-icon-btn:hover {
  background: var(--wabi-clay-bg);
  color: var(--wabi-clay);
  border-color: var(--wabi-clay-border);
}

.print-icon-btn:active {
  transform: scale(0.94);
}

.check-label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--wabi-stone);
  user-select: none;
}

.check-label:hover {
  color: var(--wabi-sumi-ink);
}

.check-input {
  width: 18px;
  height: 18px;
  accent-color: var(--wabi-moss);
  cursor: pointer;
}

.class-card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 0.55rem;
  color: var(--wabi-sumi-ink);
  line-height: 1.35;
}

.class-card-desc {
  font-size: 0.88rem;
  color: var(--wabi-sumi-body);
  margin-bottom: 1.35rem;
  line-height: 1.55;
}

.class-card-desc strong {
  color: var(--wabi-sumi-ink);
  font-weight: 600;
}

.btn-action {
  background: var(--wabi-canvas);
  color: var(--wabi-sumi-ink);
  border: 1px solid var(--wabi-border);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.84rem;
  cursor: pointer;
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  transition: all var(--spring-duration) var(--spring-ease);
  text-decoration: none;
  box-sizing: border-box;
}

.btn-action i {
  width: 15px;
  height: 15px;
  stroke-width: 1.75;
  color: var(--wabi-stone);
}

.btn-action:hover {
  background: var(--wabi-indigo);
  color: #FFFFFF;
  border-color: var(--wabi-indigo);
}

.btn-action:hover i {
  color: #FFFFFF;
}

.btn-action:active {
  transform: scale(0.98);
}

.class-card-footer-actions {
  display: flex;
  gap: 0.45rem;
  margin-top: 0.85rem;
  align-items: stretch;
}

.class-card-footer-actions .btn-action {
  flex: 1;
}

.btn-action-worksheet {
  background: var(--wabi-moss-bg);
  color: var(--wabi-moss);
  border-color: var(--wabi-moss-border);
}

.btn-action-worksheet i {
  color: var(--wabi-moss);
}

.btn-action-worksheet:hover {
  background: var(--wabi-moss);
  color: #FFFFFF;
  border-color: var(--wabi-moss);
}

.btn-action-worksheet:hover i {
  color: #FFFFFF;
}

.modal-print-btn-icon.modal-ws-btn {
  background: var(--wabi-moss-bg);
  color: var(--wabi-moss);
  border-color: var(--wabi-moss-border);
  text-decoration: none;
}

.modal-print-btn-icon.modal-ws-btn i {
  color: var(--wabi-moss);
}

.modal-print-btn-icon.modal-ws-btn:hover {
  background: var(--wabi-moss);
  color: #FFFFFF;
  border-color: var(--wabi-moss);
}

.modal-print-btn-icon.modal-ws-btn:hover i {
  color: #FFFFFF;
}

/* ==========================================================================
   Wabi-Sabi Search & Cambridge Word Tracker
   ========================================================================== */
.word-search-wrapper {
  position: relative;
  margin-bottom: 1.75rem;
}

.word-search-wrapper i {
  position: absolute;
  left: 1.15rem;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--wabi-ash);
}

.word-search-bar {
  width: 100%;
  padding: 0.95rem 1.25rem 0.95rem 2.85rem;
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-lg);
  color: var(--wabi-sumi-ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  box-shadow: var(--shadow-paper);
  transition: all var(--spring-duration) var(--spring-ease);
}

.word-search-bar:focus {
  border-color: var(--wabi-indigo);
  box-shadow: 0 0 0 3px var(--wabi-indigo-bg);
}

.word-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.word-card {
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.15rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-subtle);
  transition: all var(--spring-duration) var(--spring-ease);
}

.word-card:hover {
  border-color: var(--wabi-border-hover);
  background: var(--wabi-surface-warm);
}

.word-card.learned {
  border-color: var(--wabi-moss-border);
  background: var(--wabi-moss-bg);
}

.word-text {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--wabi-sumi-ink);
}

.word-sub {
  font-size: 0.78rem;
  color: var(--wabi-stone);
  margin-top: 0.15rem;
}

.badge-learned {
  background: var(--wabi-moss);
  color: #FFFFFF;
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.badge-learned i {
  width: 12px;
  height: 12px;
  stroke-width: 2;
}

/* ==========================================================================
   Toolboxes & Zen Classroom Experience
   ========================================================================== */
.tool-box {
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-paper);
}

.timer-display {
  font-family: var(--font-latin-serif);
  font-size: 4.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-align: center;
  color: var(--wabi-sumi-ink);
  margin: 1.25rem 0;
}

.btn-group {
  display: flex;
  gap: 0.85rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--wabi-indigo);
  color: #FFFFFF;
  border: none;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 2px 8px rgba(57, 82, 99, 0.2);
  transition: all var(--spring-duration) var(--spring-ease);
}

.btn-primary i {
  width: 16px;
  height: 16px;
  stroke-width: 1.75;
}

.btn-primary:hover {
  background: var(--wabi-indigo-hover);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: var(--wabi-canvas);
  color: var(--wabi-sumi-ink);
  border: 1px solid var(--wabi-border);
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--spring-duration) var(--spring-ease);
}

.btn-secondary i {
  width: 16px;
  height: 16px;
  stroke-width: 1.75;
  color: var(--wabi-stone);
}

.btn-secondary:hover {
  background: var(--wabi-canvas-subtle);
  border-color: var(--wabi-border-hover);
}

.btn-secondary:active {
  transform: scale(0.98);
}

.tpr-card {
  background: var(--wabi-surface-warm);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  margin-top: 1.5rem;
}

.tpr-command {
  font-family: var(--font-serif);
  font-size: 1.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--wabi-sumi-ink);
  margin: 1.25rem 0;
  line-height: 1.35;
}

/* ==========================================================================
   Resource Cards (Worksheets Cambridge)
   ========================================================================== */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}

.resource-card {
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-lg);
  padding: 1.35rem;
  text-decoration: none;
  display: flex;
  align-items: flex-start;
  gap: 1.15rem;
  box-shadow: var(--shadow-paper);
  transition: all var(--spring-duration) var(--spring-ease);
}

.resource-card:hover {
  transform: translateY(-2px);
  border-color: var(--wabi-indigo);
  box-shadow: var(--shadow-paper-elevated);
}

.resource-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--wabi-canvas);
  border: 1px solid var(--wabi-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--wabi-moss);
}

.resource-icon-badge.amber { color: var(--wabi-bamboo); background: var(--wabi-bamboo-bg); border-color: rgba(194, 149, 56, 0.3); }
.resource-icon-badge.purple { color: var(--wabi-indigo); background: var(--wabi-indigo-bg); border-color: rgba(57, 82, 99, 0.3); }
.resource-icon-badge.blue { color: var(--wabi-indigo); background: var(--wabi-indigo-bg); border-color: rgba(57, 82, 99, 0.3); }
.resource-icon-badge.emerald { color: var(--wabi-moss); background: var(--wabi-moss-bg); border-color: var(--wabi-moss-border); }

.resource-icon-badge i {
  width: 20px;
  height: 20px;
  stroke-width: 1.75;
}

.resource-content {
  flex: 1;
}

.resource-tag {
  font-family: var(--font-latin-serif);
  font-style: italic;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--wabi-stone);
  display: block;
  margin-bottom: 0.25rem;
}

.resource-title {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--wabi-sumi-ink);
  line-height: 1.35;
  margin-bottom: 0.35rem;
}

.resource-desc {
  font-size: 0.84rem;
  color: var(--wabi-sumi-body);
  line-height: 1.5;
}

/* ==========================================================================
   Wabi-Sabi Semáforo & Guidelines Cards (Calm & Reflective)
   ========================================================================== */
.status-banner {
  border-radius: var(--radius-md);
  padding: 1.15rem 1.35rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.status-banner.green {
  background: var(--wabi-moss-bg);
  border-color: var(--wabi-moss-border);
}

.status-banner.yellow {
  background: var(--wabi-bamboo-bg);
  border-color: rgba(194, 149, 56, 0.3);
}

.status-banner.red {
  background: var(--wabi-persimmon-bg);
  border-color: var(--wabi-persimmon-border);
}

.status-badge-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.8);
}

.status-banner.green .status-badge-icon { color: var(--wabi-moss); }
.status-banner.yellow .status-badge-icon { color: var(--wabi-bamboo); }
.status-banner.red .status-badge-icon { color: var(--wabi-persimmon); }

.status-badge-icon i {
  width: 16px;
  height: 16px;
  stroke-width: 1.75;
}

/* ==========================================================================
   Wabi-Sabi Modal Overlay (Handmade Paper Sheet)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(35, 34, 32, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
}

.modal-overlay.open {
  display: flex;
  animation: modalPaperOpen 0.28s var(--spring-ease);
}

@keyframes modalPaperOpen {
  from {
    opacity: 0;
    transform: scale(0.97) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-container {
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-xl);
  max-width: 880px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  padding: 2.5rem;
  box-shadow: var(--shadow-paper-elevated);
  position: relative;
}

.modal-actions-corner {
  position: absolute;
  top: 1.75rem;
  right: 1.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.modal-print-btn-icon {
  background: var(--wabi-canvas);
  border: 1px solid var(--wabi-border);
  color: var(--wabi-stone);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--spring-duration) var(--spring-ease);
}

.modal-print-btn-icon i {
  width: 18px;
  height: 18px;
  stroke-width: 1.75;
}

.modal-print-btn-icon:hover {
  background: var(--wabi-clay-bg);
  color: var(--wabi-clay);
  border-color: var(--wabi-clay-border);
}

.modal-close {
  background: var(--wabi-canvas);
  border: 1px solid var(--wabi-border);
  color: var(--wabi-stone);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--spring-duration) var(--spring-ease);
}

.modal-close i {
  width: 18px;
  height: 18px;
  stroke-width: 1.75;
}

.modal-close:hover {
  background: var(--wabi-persimmon-bg);
  color: var(--wabi-persimmon);
  border-color: var(--wabi-persimmon-border);
}

/* Activity Card inside Modal */
.activity-card {
  background: var(--wabi-surface-warm);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.activity-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--wabi-border);
}

.time-badge {
  background: var(--wabi-canvas);
  color: var(--wabi-moss);
  border: 1px solid var(--wabi-border);
  font-family: var(--font-latin-serif);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.time-badge i {
  width: 13px;
  height: 13px;
  stroke-width: 1.75;
}

.sense-pills-row {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.sense-pill {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
  background: var(--wabi-canvas);
  border: 1px solid var(--wabi-border);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.sense-pill i {
  width: 12px;
  height: 12px;
  stroke-width: 1.75;
}

.sense-pill.visual { color: #2B6CB0; background: #EBF8FF; border-color: #BEE3F8; }
.sense-pill.auditory { color: var(--wabi-indigo); background: var(--wabi-indigo-bg); border-color: #CBD5E0; }
.sense-pill.tactile { color: var(--wabi-moss); background: var(--wabi-moss-bg); border-color: var(--wabi-moss-border); }
.sense-pill.oral { color: var(--wabi-clay); background: var(--wabi-clay-bg); border-color: var(--wabi-clay-border); }

/* Responsive adjustments */
@media (max-width: 768px) {
  header {
    padding: 0.85rem 1.25rem;
  }
  .header-container {
    flex-direction: column;
    align-items: flex-start;
  }
  nav {
    width: 100%;
  }
  .stat-value {
    font-size: 2.25rem;
  }
  .timer-display {
    font-size: 3rem;
  }
}

/* ==========================================================================
   Lesson Plan Prominent Top Card & Tabler Icons System
   ========================================================================== */
.lesson-top-card {
  background: var(--wabi-surface-warm);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

.lesson-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px dashed var(--wabi-border);
}

.schedule-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #EBF8FF;
  color: #1E40AF;
  border: 1px solid #BFDBFE;
  padding: 0.4rem 0.95rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.92rem;
  box-shadow: 0 1px 3px rgba(30, 64, 175, 0.06);
}

.schedule-badge-pill i.ti {
  font-size: 1.15rem;
  color: #2563EB;
}

.date-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--wabi-moss-bg);
  color: var(--wabi-moss);
  border: 1px solid var(--wabi-moss-border);
  padding: 0.4rem 0.95rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.88rem;
}

.date-badge-pill i.ti {
  font-size: 1.1rem;
}

.vocab-section-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.vocab-block {
  background: #FFFFFF;
  border: 1px solid var(--wabi-border-light);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.1rem;
  display: flex;
  flex-direction: column;
}

.vocab-block-title {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.55rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.vocab-block-title.new {
  color: #B45309;
}

.vocab-block-title.recycled {
  color: #1D4ED8;
}

.vocab-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.vocab-chip {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  line-height: 1.35;
}

.vocab-chip.new {
  background: #FEF3C7;
  color: #92400E;
  border: 1px solid #FDE68A;
}

.vocab-chip.recycled {
  background: #EFF6FF;
  color: #1E40AF;
  border: 1px solid #DBEAFE;
}

/* Roles Grid & Boxes (No Emojis) */
.roles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.85rem;
  margin-top: 0.65rem;
}

.role-box {
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  line-height: 1.58;
  border: 1px solid var(--wabi-border);
}

.role-box.teacher {
  background: #F8FAFC;
  border-left: 4px solid var(--wabi-indigo);
}

.role-box.student {
  background: #FDFBF7;
  border-left: 4px solid var(--wabi-clay);
}

.role-header {
  font-weight: 800;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.role-box.teacher .role-header {
  color: var(--wabi-indigo);
}

.role-box.student .role-header {
  color: var(--wabi-clay);
}

.ti {
  vertical-align: middle;
}

/* ==========================================================================
   PRINT STYLES: Single/Multi-Page A4 Printing (Preserved & Enhanced)
   ========================================================================== */
@media print {
  @page {
    size: A4 portrait;
    margin: 10mm 10mm;
  }

  body * {
    visibility: hidden;
  }

  #printable-area, #printable-area * {
    visibility: visible;
  }

  #printable-area {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    color: #232220 !important;
    background: #FFFFFF !important;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 11px;
    line-height: 1.45;
  }

  .print-page-wrapper {
    padding: 0;
    width: 100%;
  }

  .print-header-bar {
    border-bottom: 2px solid #232220;
    padding-bottom: 6px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
  }

  .print-class-title {
    font-size: 17px;
    font-weight: 800;
    color: #232220;
    margin: 0 0 3px 0;
  }

  .print-subtitle {
    font-size: 11px;
    font-weight: 600;
    color: #444444;
  }

  .print-meta-pill {
    font-size: 10px;
    font-weight: 800;
    background: #232220;
    color: #ffffff;
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-block;
  }

  .print-top-card {
    border: 1px solid #232220;
    background: #faf8f5;
    padding: 8px 10px;
    border-radius: 4px;
    margin-bottom: 10px;
  }

  .print-schedule-line {
    font-size: 11px;
    font-weight: 800;
    color: #232220;
    margin-bottom: 5px;
    display: flex;
    justify-content: space-between;
    border-bottom: 1px dashed #d5cebf;
    padding-bottom: 4px;
  }

  .print-vocab-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    font-size: 10.5px;
  }

  .print-vocab-box strong {
    text-transform: uppercase;
    font-size: 9.5px;
    display: block;
    margin-bottom: 2px;
  }

  .print-grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 10px;
  }

  .print-card-box {
    border: 1px solid #d5cebf;
    background: #faf8f5;
    padding: 8px 10px;
    border-radius: 4px;
  }

  .print-box-header {
    font-weight: 800;
    font-size: 11px;
    color: #232220;
    text-transform: uppercase;
    border-bottom: 1px solid #d5cebf;
    padding-bottom: 3px;
    margin-bottom: 5px;
  }

  .print-list {
    margin: 0;
    padding-left: 16px;
    font-size: 10.5px;
    color: #333333;
    line-height: 1.4;
  }

  .print-senses-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 10px;
    background: #f7f5ee;
    padding: 8px;
    border: 1px solid #d5cebf;
    border-radius: 4px;
  }

  .print-sense-col {
    font-size: 10px;
    line-height: 1.35;
    color: #333333;
  }

  .print-block-item {
    border: 1px solid #d5cebf;
    border-radius: 4px;
    margin-bottom: 8px;
    padding: 8px 10px;
    background: #ffffff;
    page-break-inside: avoid;
  }

  .print-block-top {
    display: flex;
    justify-content: space-between;
    font-weight: 800;
    font-size: 11px;
    background: #f0ece1;
    color: #232220;
    padding: 3px 6px;
    border-radius: 3px;
    margin-bottom: 5px;
  }

  .print-block-item .roles-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin-top: 4px;
  }

  .print-block-item .role-box {
    padding: 4px 6px;
    font-size: 10px;
    line-height: 1.4;
  }

  .print-block-item .role-header {
    font-size: 10px;
    margin-bottom: 3px;
  }
}

/* ==========================================================================
   Academic Filters, Hierarchy & Teacher Assignment System
   ========================================================================== */

.academic-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  padding: 0.95rem 1.25rem;
  border-radius: var(--radius-lg);
  margin-bottom: 1.25rem;
  box-shadow: 0 2px 8px rgba(35, 34, 32, 0.03);
}

.academic-filter-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1 1 200px;
}

.academic-filter-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--wabi-stone);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
}

.academic-select {
  width: 100%;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--wabi-border);
  background: var(--wabi-canvas);
  color: var(--wabi-sumi-ink);
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  outline: none;
}

.academic-select:focus {
  border-color: var(--wabi-indigo);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(57, 82, 99, 0.12);
}

.academic-filter-actions {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.btn-manage-teachers {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1rem;
  background: var(--wabi-indigo-bg);
  color: var(--wabi-indigo);
  border: 1px solid rgba(57, 82, 99, 0.25);
  border-radius: var(--radius-md);
  font-size: 0.84rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-manage-teachers:hover {
  background: var(--wabi-indigo);
  color: #fff;
  box-shadow: 0 3px 8px rgba(57, 82, 99, 0.2);
}

/* Teacher badges on class cards */
.class-meta-badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.55rem;
}

.card-teacher-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.74rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--wabi-indigo-bg);
  color: var(--wabi-indigo);
  border: 1px solid rgba(57, 82, 99, 0.2);
}

.card-course-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--wabi-bamboo-bg);
  color: var(--wabi-bamboo);
  border: 1px solid rgba(194, 149, 56, 0.25);
}

/* Dynamic Teacher Tag Replacement Styling in Lessons */
.teacher-name-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.9em;
}

.teacher-name-tag.teacher-1-tag {
  background: #e0e7ff;
  color: #1e3a8a;
  border: 1px solid #bfdbfe;
}

.teacher-name-tag.teacher-2-tag {
  background: #ccfbf1;
  color: #0f766e;
  border: 1px solid #99f6e4;
}

/* Assignment Bar inside Lesson Plan Modal */
.lesson-assignment-panel {
  background: var(--wabi-canvas-subtle);
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.1rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.assignment-field {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex: 1 1 220px;
}

.assignment-field label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--wabi-sumi-ink);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.assignment-field select {
  flex: 1;
  padding: 0.4rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--wabi-border);
  background: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--wabi-sumi-ink);
  outline: none;
}

.assignment-field select:focus {
  border-color: var(--wabi-indigo);
}

/* Teachers Management Modal */
.teachers-modal-card {
  max-width: 620px;
}

.teacher-add-form {
  background: var(--wabi-canvas);
  border: 1px solid var(--wabi-border);
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
}

.teacher-add-form .form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.teacher-add-form input {
  flex: 1 1 160px;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--wabi-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  background: #fff;
  outline: none;
}

.teacher-add-form input:focus {
  border-color: var(--wabi-indigo);
}

.teachers-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}

.teachers-table th {
  text-align: left;
  padding: 0.65rem 0.75rem;
  background: var(--wabi-canvas);
  color: var(--wabi-stone);
  font-weight: 700;
  border-bottom: 1px solid var(--wabi-border);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.teachers-table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--wabi-border-light);
  color: var(--wabi-sumi-ink);
}

.teacher-pill-preview {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 700;
}

.btn-action-icon {
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px 8px;
  border-radius: 4px;
  transition: all 0.15s ease;
  font-size: 1.05rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-edit-teacher {
  color: var(--wabi-indigo);
}

.btn-edit-teacher:hover {
  background: var(--wabi-indigo-bg);
}

.btn-remove-teacher {
  color: var(--wabi-persimmon);
}

.btn-remove-teacher:hover {
  background: var(--wabi-persimmon-bg);
}

.card-teacher-badge.unassigned {
  background: var(--wabi-canvas-subtle);
  color: var(--wabi-stone);
  border-color: var(--wabi-border);
}

.teacher-name-tag.teacher-unassigned {
  background: var(--wabi-canvas-subtle);
  color: var(--wabi-stone);
  border: 1px dashed var(--wabi-ash);
}

/* In-App Toast Notification */
.app-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--wabi-sumi-ink);
  color: #fff;
  padding: 0.85rem 1.35rem;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 10000;
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.app-toast.visible {
  transform: translateY(0);
  opacity: 1;
}

.app-toast.success {
  border-left: 4px solid var(--wabi-moss);
}

.app-toast.alert,
.app-toast.error {
  border-left: 4px solid var(--wabi-persimmon);
}

.app-toast.info {
  border-left: 4px solid var(--wabi-indigo);
}

/* Reassign Sub-Modal */
.reassign-modal-card {
  max-width: 520px;
}

.reassign-box {
  background: var(--wabi-canvas);
  border: 1px solid var(--wabi-border);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  margin-top: 1rem;
  margin-bottom: 1.25rem;
}

.reassign-box label {
  display: block;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--wabi-sumi-ink);
  margin-bottom: 0.5rem;
}

.reassign-select {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--wabi-border);
  background: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--wabi-sumi-ink);
  outline: none;
}

.btn-delete-confirm {
  background: var(--wabi-persimmon);
  color: #fff;
  border: none;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.2s ease;
}

.btn-delete-confirm:hover {
  background: #8c382e;
}

.empty-classes-notice {
  text-align: center;
  padding: 3rem 1.5rem;
  background: var(--wabi-surface);
  border: 1.5px dashed var(--wabi-border);
  border-radius: var(--radius-lg);
  grid-column: 1 / -1;
}

.empty-classes-notice h3 {
  font-family: var(--font-serif);
  color: var(--wabi-sumi-ink);
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.empty-classes-notice p {
  color: var(--wabi-stone);
  font-size: 0.9rem;
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.5;
}

#btn-open-edit-schedule:hover {
  background: var(--wabi-clay-bg) !important;
  color: var(--wabi-clay) !important;
}

/* ==========================================================================
   Resource Links & QR Code Generator Button System (Mobile-Ready)
   ========================================================================== */

.resource-link-wrapper {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.25rem 0;
  vertical-align: middle;
}

.lesson-resource-link {
  font-weight: 800 !important;
  color: #0284c7 !important; /* Eye-catching electric blue */
  text-decoration: underline !important;
  text-underline-offset: 3px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.15s ease, transform 0.15s ease;
}

.lesson-resource-link:hover {
  color: #0369a1 !important;
  transform: translateY(-1px);
}

.btn-create-qr {
  background: #059669 !important; /* High-contrast emerald green */
  color: #ffffff !important;
  font-family: var(--font-sans, -apple-system, sans-serif);
  font-size: 0.78rem !important;
  font-weight: 700 !important;
  padding: 0.25rem 0.65rem !important;
  border-radius: 6px !important;
  border: none !important;
  cursor: pointer !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 0.3rem !important;
  box-shadow: 0 2px 6px rgba(5, 150, 105, 0.28) !important;
  transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease !important;
  line-height: 1.2 !important;
}

.btn-create-qr:hover {
  background: #047857 !important;
  transform: translateY(-1px) scale(1.03) !important;
  box-shadow: 0 4px 10px rgba(5, 150, 105, 0.38) !important;
}

.btn-create-qr:active {
  transform: scale(0.97) !important;
}

.btn-create-qr i {
  font-size: 0.95rem;
}

.qr-modal-card {
  animation: modalPopIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalPopIn {
  from {
    opacity: 0;
    transform: scale(0.94) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}