/* Matrix Online Classes - Brand Identity (Matrix International Schools) */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400..700;1,9..40,400..700&family=JetBrains+Mono:wght@400..800&family=Plus+Jakarta+Sans:wght@500;600;700;800;900&display=swap');

:root {
  /* Matrix International Schools Color Palette (From Official Logo) */
  --matrix-navy: #153860;
  --matrix-navy-dark: #0D2644;
  --matrix-navy-hover: #102F52;
  --matrix-navy-light: #EBF2FA;
  --matrix-navy-subtle: #F4F8FC;
  --matrix-navy-border: #CBD5E1;

  --matrix-gold: #EAA228;
  --matrix-gold-dark: #D98E16;
  --matrix-gold-hover: #D98E16;
  --matrix-gold-light: #FEF3C7;
  --matrix-gold-subtle: #FFFBEB;
  --matrix-gold-border: #FDE68A;

  --classroom-green: #15803D;
  --classroom-green-hover: #166534;
  --classroom-green-light: #DCFCE7;
  
  --friendly-coral: #EA580C;
  --friendly-coral-light: #FFEDD5;

  --canvas-bg: #F8FAFD;
  --canvas-warm: #F1F5F9;
  --card-bg: #FFFFFF;
  
  --text-primary: #0F2236;
  --text-secondary: #334E68;
  --text-muted: #627D98;

  --border-color: #E2E8F0;
  --border-highlight: #93C5FD;

  --shadow-sm: 0 2px 4px rgba(21, 56, 96, 0.04);
  --shadow-md: 0 6px 16px -2px rgba(21, 56, 96, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 16px 32px -4px rgba(21, 56, 96, 0.12), 0 8px 12px -4px rgba(234, 162, 40, 0.06);
  --shadow-spotlight: 0 20px 40px -8px rgba(21, 56, 96, 0.16), 0 8px 16px -4px rgba(234, 162, 40, 0.1);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --font-display: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  box-sizing: border-box;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  background-color: var(--canvas-bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.5;
  min-height: 100vh;
  width: 100%;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Fluid Media Rule: Ensure all img, svg, video, and iframe elements scale gracefully */
img, svg, video, iframe {
  max-width: 100%;
  height: auto;
}

/* Geometric Logo Motif Background Decor */
.bg-decorations {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.doodle-sun {
  position: absolute;
  top: -60px;
  right: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(234, 162, 40, 0.18) 0%, rgba(21, 56, 96, 0.04) 65%, transparent 75%);
  filter: blur(14px);
}

.doodle-cloud-1 {
  position: absolute;
  top: 50px;
  left: 4%;
  opacity: 0.45;
}

.doodle-cloud-2 {
  position: absolute;
  top: 130px;
  right: 5%;
  opacity: 0.4;
}

.doodle-stars {
  position: absolute;
  bottom: 80px;
  left: 4%;
  opacity: 0.35;
}

/* Main Container */
.app-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 80px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   PAGE 1: CENTERED STEP-BY-STEP PICKER (MATRIX BRAND IDENTITY)
   ========================================================================== */
.picker-page-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 0;
}

.picker-card {
  background: var(--card-bg);
  border: 2px solid #E2E8F0;
  border-top: 5px solid var(--matrix-navy);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  width: 100%;
  max-width: 720px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  position: relative;
  animation: cardFadeIn 0.35s ease-out;
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.school-badge-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #FFFFFF;
  padding: 12px 28px;
  border-radius: 20px;
  margin-bottom: 22px;
  box-shadow: 0 8px 24px rgba(21, 56, 96, 0.08);
  border: 2px solid var(--matrix-navy-light);
  cursor: pointer;
  transition: transform 0.2s;
}

.school-badge-wrapper:hover {
  transform: scale(1.02);
}

.school-logo-img {
  max-width: 290px;
  width: 100%;
  height: auto;
  max-height: 80px;
  object-fit: contain;
  display: block;
}

.picker-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 2.2rem;
  color: var(--matrix-navy);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.picker-title span {
  color: var(--matrix-gold);
}

.picker-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 34px;
}

/* Step Headers */
.step-section {
  margin-bottom: 28px;
  text-align: left;
}

.step-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--matrix-navy);
  margin-bottom: 14px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: var(--matrix-navy);
  color: #FFFFFF;
  border-radius: 50%;
  font-size: 0.95rem;
  font-weight: 900;
  box-shadow: 0 2px 6px rgba(21, 56, 96, 0.25);
}

.step-number.yellow {
  background: var(--matrix-gold);
  color: var(--matrix-navy-dark);
}

/* Grid of Grade Buttons */
.grades-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
}

@media (min-width: 600px) {
  .grades-grid {
    grid-template-columns: repeat(auto-fit, minmax(95px, 1fr));
  }
}

.grade-btn {
  background: #F8FAFD;
  border: 2px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--text-primary);
  outline: none;
}

.grade-btn:hover {
  border-color: var(--matrix-navy-border);
  background: var(--matrix-navy-subtle);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(21, 56, 96, 0.08);
}

.grade-btn .grade-num {
  font-size: 1.55rem;
  color: var(--matrix-navy);
  line-height: 1;
}

.grade-btn .grade-text {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.grade-btn.selected {
  background: var(--matrix-navy);
  border-color: var(--matrix-gold);
  color: #FFFFFF;
  box-shadow: 0 8px 20px rgba(21, 56, 96, 0.35);
  transform: translateY(-2px) scale(1.03);
}

.grade-btn.selected .grade-num,
.grade-btn.selected .grade-text {
  color: #FFFFFF;
}

/* Step 2: Class Section Buttons */
.step-class-wrapper {
  animation: slideDownFade 0.3s ease-out;
}

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

.classes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(85px, 1fr));
  gap: 12px;
  width: 100%;
}

.class-btn {
  width: 100%;
  min-width: 0;
  background: #F8FAFD;
  border: 2px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 14px 10px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--matrix-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  outline: none;
}

.class-btn:hover {
  border-color: var(--matrix-gold);
  background: var(--matrix-gold-subtle);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(234, 162, 40, 0.15);
}

.class-btn.selected {
  background: linear-gradient(135deg, var(--matrix-gold) 0%, var(--matrix-gold-dark) 100%);
  border-color: var(--matrix-gold-dark);
  color: var(--matrix-navy-dark);
  box-shadow: 0 8px 20px rgba(234, 162, 40, 0.35);
  transform: translateY(-2px) scale(1.03);
}

/* Big "Go to My Class" CTA */
.go-class-btn {
  width: 100%;
  background: linear-gradient(135deg, var(--matrix-navy) 0%, var(--matrix-navy-dark) 100%);
  color: #FFFFFF;
  border: 2px solid var(--matrix-gold);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 8px 24px rgba(21, 56, 96, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 14px;
  outline: none;
}

.go-class-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--matrix-navy-dark) 0%, #08192E 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(21, 56, 96, 0.35);
  border-color: #FBBF24;
}

.go-class-btn:active:not(:disabled) {
  transform: translateY(0);
}

.go-class-btn:disabled {
  background: #CBD5E1;
  border-color: transparent;
  color: #64748B;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* ==========================================================================
   PAGE 2: STUDENT CLASS VIEW (MATRIX APP IDENTITY)
   ========================================================================== */
.portal-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 22px;
  background: var(--card-bg);
  border: 2px solid var(--matrix-navy-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: 28px;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
}

.header-logo-img {
  height: 48px;
  max-width: 175px;
  width: auto;
  object-fit: contain;
  display: block;
  background: #FFFFFF;
  padding: 4px 8px;
  border-radius: 10px;
  border: 1px solid #E2E8F0;
  box-shadow: 0 2px 6px rgba(21, 56, 96, 0.05);
}

.header-brand-text h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.3rem;
  color: var(--matrix-navy);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.header-brand-text p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.class-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--matrix-gold-light);
  color: #78350F;
  border: 1.5px solid var(--matrix-gold);
  padding: 7px 14px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
}

.switch-class-btn {
  background: var(--matrix-navy-subtle);
  border: 1.5px solid var(--matrix-navy-border);
  color: var(--matrix-navy);
  padding: 7px 14px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.switch-class-btn:hover {
  background: var(--matrix-navy);
  border-color: var(--matrix-navy);
  color: #FFFFFF;
}

.share-class-btn {
  background: var(--matrix-gold-light);
  border: 1.5px solid var(--matrix-gold);
  color: #78350F;
  padding: 7px 14px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.share-class-btn:hover {
  background: var(--matrix-gold);
  color: var(--matrix-navy-dark);
  transform: translateY(-1px);
}

.drawer-share-section {
  background: var(--matrix-navy-subtle);
  border: 1.5px solid var(--matrix-navy-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: 14px;
}

.drawer-share-url-box {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  border-radius: 6px;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--matrix-navy);
  word-break: break-all;
  margin: 6px 0;
  user-select: all;
}

.copy-share-full-btn {
  width: 100%;
  background: var(--matrix-navy);
  color: #FFFFFF;
  border: 1.5px solid var(--matrix-gold);
  border-radius: 6px;
  padding: 8px 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.82rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.15s;
}

.copy-share-full-btn:hover {
  background: var(--matrix-navy-dark);
}

.live-clock-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  background: #F1F5F9;
  color: var(--matrix-navy);
  padding: 7px 12px;
  border-radius: var(--radius-full);
  border: 1px solid #CBD5E1;
}

.clock-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #16A34A;
  box-shadow: 0 0 6px rgba(22, 163, 74, 0.6);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* ==========================================================================
   ONE BIG COMING / CURRENT SESSION SPOTLIGHT CARD
   ========================================================================== */
.spotlight-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 34px 32px;
  margin-bottom: 34px;
  box-shadow: var(--shadow-spotlight);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
}

/* When class session is ready / active */
.spotlight-card.is-active {
  border-color: #86EFAC;
  background: radial-gradient(circle at top right, rgba(220, 252, 231, 0.45) 0%, #FFFFFF 65%);
}

/* When class session is upcoming */
.spotlight-card.is-upcoming {
  border-color: var(--matrix-navy-border);
  background: radial-gradient(circle at top right, rgba(235, 242, 250, 0.6) 0%, #FFFFFF 65%);
}

/* When day is done */
.spotlight-card.is-done {
  border-color: #E2E8F0;
  background: #FFFFFF;
}

.spotlight-banner {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.spotlight-banner.live {
  background: #DCFCE7;
  color: #15803D;
  border: 1px solid #86EFAC;
}

.spotlight-banner.next {
  background: var(--matrix-gold-light);
  color: #854D0E;
  border: 1px solid var(--matrix-gold);
}

.spotlight-banner.done {
  background: #F1F5F9;
  color: #475569;
  border: 1px solid #E2E8F0;
}

.spotlight-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

@media (min-width: 768px) {
  .spotlight-content {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.spotlight-info {
  flex: 1;
}

.spotlight-subject-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.spotlight-subject-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  background: #F1F5F9;
  box-shadow: 0 4px 12px rgba(21, 56, 96, 0.08);
}

.spotlight-subject-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 2.25rem;
  color: var(--matrix-navy);
  line-height: 1.15;
}

.spotlight-teacher-bilingual {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-bottom: 14px;
}

.spotlight-teacher-name {
  font-weight: 700;
  font-size: 1.15rem;
  color: #334E68;
}

.spotlight-meta-chips {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: #F8FAFD;
  border: 1px solid #E2E8F0;
  font-size: 0.9rem;
  color: var(--matrix-navy);
  font-weight: 700;
}

.meta-chip.time {
  font-family: var(--font-mono);
  font-weight: 700;
  background: var(--matrix-navy-light);
  border-color: var(--matrix-navy-border);
  color: var(--matrix-navy);
}

/* Spotlight Action Box (Zoom App Launcher & Web Option) */
.spotlight-action-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  min-width: 0;
}

@media (min-width: 768px) {
  .spotlight-action-box {
    width: 320px;
    flex-shrink: 0;
  }
}

/* Primary "Launch in Zoom App" CTA */
.join-now-cta {
  background: linear-gradient(135deg, #16A34A 0%, #15803D 100%);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-md);
  padding: 18px 24px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 10px 24px rgba(22, 163, 74, 0.35);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  animation: pulseGlow 2.5s infinite;
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 10px 24px rgba(22, 163, 74, 0.35);
    transform: translateY(0);
  }
  50% {
    box-shadow: 0 14px 30px rgba(22, 163, 74, 0.5);
    transform: translateY(-2px);
  }
}

.join-now-cta:hover {
  background: linear-gradient(135deg, #15803D 0%, #166534 100%);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 32px rgba(22, 163, 74, 0.5);
}

/* Secondary "Join via Web Browser" button */
.join-web-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--matrix-navy-subtle);
  border: 1px solid var(--matrix-navy-border);
  color: var(--matrix-navy);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 700;
  transition: all 0.15s;
}

.join-web-cta:hover {
  background: var(--matrix-navy);
  color: #FFFFFF;
}

.credentials-container {
  background: #F8FAFD;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.credential-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.88rem;
}

.credential-label {
  color: var(--text-muted);
  font-weight: 600;
}

.credential-value {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--matrix-navy);
  background: #FFFFFF;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid #CBD5E1;
}

.copy-mini-btn {
  background: #E2E8F0;
  border: none;
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--matrix-navy);
  cursor: pointer;
  transition: all 0.15s;
}

.copy-mini-btn:hover {
  background: var(--matrix-navy);
  color: #FFFFFF;
}

/* Waiting / Countdown Box */
.countdown-box {
  background: #F8FAFD;
  border: 2px dashed var(--matrix-navy-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  text-align: center;
}

.countdown-label {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 800;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.countdown-timer {
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.9rem;
  color: var(--matrix-navy);
  line-height: 1.1;
  margin-bottom: 8px;
}

.unlock-info-badge {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--matrix-navy);
  background: var(--matrix-gold-light);
  border: 1px solid var(--matrix-gold);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
}

/* ==========================================================================
   DAILY SCHEDULE SECTION & SESSION CARDS
   ========================================================================== */
.schedule-section-header {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 20px;
}

@media (min-width: 640px) {
  .schedule-section-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.schedule-heading {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.4rem;
  color: var(--matrix-navy);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Day Switcher Tabs (Matrix Navy Theme) */
.day-tabs {
  display: flex;
  background: #EBF2FA;
  padding: 4px;
  border-radius: var(--radius-full);
  gap: 4px;
  border: 1px solid var(--matrix-navy-border);
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.day-tabs::-webkit-scrollbar {
  display: none;
}

.day-tab-btn {
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  padding: 8px 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.92rem;
  color: var(--matrix-navy);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  outline: none;
}

.day-tab-btn:hover {
  color: var(--matrix-navy-dark);
}

.day-tab-btn.active {
  background: var(--matrix-navy);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(21, 56, 96, 0.25);
}

/* Session Cards Container */
.periods-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Individual Session Card */
.session-card, .period-card {
  background: var(--card-bg);
  border: 2px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: grid;
  grid-template-columns: 88px 1fr auto;
  align-items: center;
  gap: 18px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

@media (max-width: 640px) {
  .session-card, .period-card {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 16px;
  }
}

.session-card:hover, .period-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--matrix-navy-border);
}

/* Session Number & Time Column */
.period-time-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.period-badge {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.95rem;
  color: var(--matrix-navy);
}

.period-time-text {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 700;
  white-space: nowrap;
}

/* Session Main Info Column */
.period-info-col {
  display: flex;
  align-items: center;
  gap: 14px;
}

.period-subject-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.period-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.period-subject-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.15rem;
  color: var(--matrix-navy);
  display: flex;
  align-items: center;
  gap: 8px;
}

.period-teacher {
  font-size: 0.88rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Session Status Badge / Action Button */
.period-action-col {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.85rem;
  white-space: nowrap;
}

/* Status variants */
.status-badge.live {
  background: #DCFCE7;
  color: #15803D;
  border: 1.5px solid #86EFAC;
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(34, 197, 94, 0); }
}

.status-badge.up-next {
  background: var(--matrix-gold-light);
  color: #A16207;
  border: 1.5px solid var(--matrix-gold);
}

.status-badge.locked {
  background: #F1F5F9;
  color: #64748B;
  border: 1px solid #E2E8F0;
}

.status-badge.finished {
  background: #F8FAFD;
  color: #94A3B8;
  border: 1px solid #E2E8F0;
}

/* Break banner between sessions */
.schedule-break-banner {
  background: var(--matrix-gold-subtle);
  border: 1.5px dashed var(--matrix-gold);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.86rem;
  color: #92400E;
  font-weight: 800;
  margin: 4px 0;
  width: 100%;
}

/* ==========================================================================
   FRIENDLY LOCKED-SESSION MODAL
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(13, 38, 68, 0.55);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  overflow-y: auto;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.friendly-modal {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  max-width: 460px;
  width: 100%;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  text-align: center;
  box-shadow: 0 25px 50px -12px rgba(13, 38, 68, 0.35);
  border: 3px solid var(--matrix-gold);
  transform: translateY(20px) scale(0.96);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.modal-overlay.open .friendly-modal {
  transform: translateY(0) scale(1);
}

.modal-mascot-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--matrix-gold-light) 0%, var(--matrix-gold) 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  margin-bottom: 18px;
  box-shadow: 0 8px 18px rgba(234, 162, 40, 0.3);
}

.modal-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--matrix-navy);
  margin-bottom: 8px;
}

.modal-body-text {
  font-size: 1.02rem;
  color: #334E68;
  margin-bottom: 20px;
  line-height: 1.5;
}

.modal-highlight-box {
  background: var(--matrix-gold-subtle);
  border: 1.5px solid var(--matrix-gold-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 24px;
  font-size: 0.95rem;
  color: #92400E;
  text-align: left;
}

.modal-highlight-box strong {
  color: #78350F;
}

.modal-close-btn {
  background: var(--matrix-navy);
  color: #FFFFFF;
  border: 2px solid var(--matrix-gold);
  border-radius: var(--radius-md);
  padding: 14px 28px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.2s;
  width: 100%;
}

.modal-close-btn:hover {
  background: var(--matrix-navy-dark);
  transform: translateY(-1px);
}

/* ==========================================================================
   TEACHER "TEST CLOCK" TOOL (TUCKED AWAY IN CORNER)
   ========================================================================== */
.test-clock-fab {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 50;
  background: #FFFFFF;
  border: 2px solid var(--matrix-navy-border);
  border-radius: var(--radius-full);
  padding: 10px 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.88rem;
  color: var(--matrix-navy);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  outline: none;
}

.test-clock-fab:hover {
  background: var(--matrix-navy);
  color: #FFFFFF;
  border-color: var(--matrix-navy);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(21, 56, 96, 0.2);
}

.test-clock-fab.active {
  background: var(--matrix-navy);
  color: #FFFFFF;
  border-color: var(--matrix-gold);
}

/* Drawer for Teacher Test Clock */
.test-clock-drawer {
  position: fixed;
  bottom: 74px;
  right: 20px;
  width: 360px;
  max-width: calc(100vw - 40px);
  max-height: calc(100vh - 90px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background: #FFFFFF;
  border: 2px solid var(--matrix-navy);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: 0 20px 40px -8px rgba(21, 56, 96, 0.25);
  z-index: 50;
  display: none;
  animation: drawerSlideUp 0.25s ease-out;
}

.test-clock-drawer.open {
  display: block;
}

@keyframes drawerSlideUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid #E2E8F0;
}

.drawer-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--matrix-navy);
  display: flex;
  align-items: center;
  gap: 8px;
}

.drawer-close {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: #94A3B8;
  padding: 4px;
}

.drawer-close:hover {
  color: var(--matrix-navy);
}

/* Teacher Drawer Action Buttons (Real Clock / Lock Test Clock) */
.drawer-actions-row {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.drawer-action-btn {
  flex: 1;
  padding: 9px 10px;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.8rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s ease;
  border: 1.5px solid transparent;
}

.real-clock-btn {
  background: #F1F5F9;
  color: var(--matrix-navy);
  border-color: #CBD5E1;
}

.real-clock-btn:hover {
  background: #E2E8F0;
  border-color: #94A3B8;
}

.real-clock-btn.active {
  background: #FFFFFF;
  border-color: var(--matrix-navy);
  box-shadow: 0 2px 6px rgba(21, 56, 96, 0.15);
}

.lock-clock-btn {
  background: #FEF2F2;
  color: #DC2626;
  border-color: #FECACA;
}

.lock-clock-btn:hover {
  background: #DC2626;
  color: #FFFFFF;
  border-color: #DC2626;
  box-shadow: 0 4px 10px rgba(220, 38, 38, 0.25);
}

/* Time Slider in Drawer */
.slider-time-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--matrix-navy);
  margin-bottom: 6px;
}

.slider-time-badge {
  background: var(--matrix-navy);
  color: #FFFFFF;
  padding: 3px 9px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.drawer-time-slider {
  width: 100%;
  accent-color: var(--matrix-navy);
  cursor: pointer;
  height: 6px;
  border-radius: 4px;
  margin: 6px 0 2px;
}

.slider-range-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 0.68rem;
  font-weight: 700;
  color: #94A3B8;
  margin-bottom: 8px;
}

/* Top bar Test Clock Button */
.topbar-test-clock-btn {
  background: #FFFFFF;
  border: 1.5px solid var(--matrix-navy-border);
  color: var(--matrix-navy);
  border-radius: var(--radius-full);
  padding: 8px 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.86rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.topbar-test-clock-btn:hover {
  background: var(--matrix-navy);
  color: #FFFFFF;
  border-color: var(--matrix-navy);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(21, 56, 96, 0.15);
}

.topbar-test-clock-btn.active {
  background: #FFFBEB;
  border-color: #F59E0B;
  color: #B45309;
}

.test-badge-pill {
  background: #EA580C;
  color: #FFFFFF;
  font-size: 0.65rem;
  font-weight: 900;
  padding: 2px 6px;
  border-radius: 999px;
  letter-spacing: 0.5px;
}

/* Teacher Passcode Modal Styles */
.teacher-passcode-card {
  border-color: var(--matrix-navy);
}

.passcode-input-wrap {
  position: relative;
  width: 100%;
}

.passcode-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #CBD5E1;
  border-radius: var(--radius-md);
  font-size: 1.1rem;
  text-align: center;
  letter-spacing: 2px;
  font-weight: 700;
  font-family: var(--font-mono);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.passcode-input:focus {
  border-color: var(--matrix-navy);
  box-shadow: 0 0 0 3px rgba(21, 56, 96, 0.15);
}

.passcode-input.error {
  border-color: #EF4444;
  background: #FEF2F2;
  animation: shakeInput 0.3s ease-in-out;
}

@keyframes shakeInput {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.passcode-error-msg {
  color: #DC2626;
  font-size: 0.88rem;
  font-weight: 800;
  margin-top: 10px;
  background: #FEF2F2;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid #FECACA;
  text-align: center;
}

.modal-btn-row {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  justify-content: center;
}

.modal-btn-row .btn-secondary {
  flex: 1;
  background: #F1F5F9;
  color: #475569;
  border: none;
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s;
}

.modal-btn-row .btn-secondary:hover {
  background: #E2E8F0;
  color: #1E293B;
}

.modal-btn-row .btn-primary {
  flex: 1.3;
  background: var(--matrix-navy);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(21, 56, 96, 0.2);
}

.modal-btn-row .btn-primary:hover {
  background: var(--matrix-navy-dark);
  transform: translateY(-1px);
}

.test-mode-toggle {
  display: flex;
  gap: 6px;
  background: #F1F5F9;
  padding: 4px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.test-toggle-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 7px;
  font-size: 0.8rem;
  font-weight: 800;
  border-radius: 6px;
  cursor: pointer;
  color: #64748B;
  transition: all 0.15s;
}

.test-toggle-btn.active {
  background: #FFFFFF;
  color: var(--matrix-navy);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.drawer-field {
  margin-bottom: 14px;
}

.drawer-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--matrix-navy);
  margin-bottom: 6px;
}

.drawer-select, .drawer-input {
  width: 100%;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid #CBD5E1;
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
}

.drawer-select:focus, .drawer-input:focus {
  border-color: var(--matrix-navy);
}

.test-presets-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 10px;
}

.preset-btn {
  background: #F8FAFD;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  padding: 7px 6px;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--matrix-navy);
  cursor: pointer;
  text-align: left;
  transition: all 0.15s;
}

.preset-btn:hover {
  background: var(--matrix-navy-light);
  border-color: var(--matrix-navy-border);
  color: var(--matrix-navy-dark);
}

/* Toast notification */
.toast-notice {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(30px);
  background: var(--matrix-navy-dark);
  color: #FFFFFF;
  padding: 10px 20px;
  border: 1.5px solid var(--matrix-gold);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.9rem;
  box-shadow: 0 10px 25px rgba(13, 38, 68, 0.3);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: calc(100vw - 32px);
  width: max-content;
  text-align: center;
}

.toast-notice.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ==========================================================================
   RESPONSIVE DESIGN & MEDIA QUERIES (100% RESPONSIVE SUITE)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Large Monitors & Desktops (min-width: 1200px)
   -------------------------------------------------------------------------- */
@media (min-width: 1200px) {
  .app-container {
    max-width: 1120px;
  }

  .grades-grid {
    grid-template-columns: repeat(9, 1fr);
  }
}

/* --------------------------------------------------------------------------
   2. Tablets & Medium Screens (768px to 1024px)
   -------------------------------------------------------------------------- */
@media (min-width: 768px) and (max-width: 1024px) {
  .app-container {
    padding: 20px 16px 80px;
    max-width: 100%;
  }

  .picker-card {
    padding: 36px 30px;
    max-width: 640px;
  }

  .portal-header {
    padding: 12px 18px;
    gap: 14px;
  }

  .spotlight-card {
    padding: 28px 24px;
    margin-bottom: 26px;
  }

  .spotlight-subject-title {
    font-size: 1.85rem;
  }

  .spotlight-action-box {
    width: 290px;
  }

  .session-card, .period-card {
    grid-template-columns: 88px 1fr auto;
    gap: 14px;
    padding: 14px 18px;
  }

  .period-subject-title {
    font-size: 1.1rem;
  }
}

/* --------------------------------------------------------------------------
   3. Mobile Phones & Small Screens (max-width: 767px)
   -------------------------------------------------------------------------- */
@media (max-width: 767px) {
  /* Layout & Containers */
  .app-container {
    padding: 14px 12px 76px;
    width: 100%;
  }

  .bg-decorations {
    opacity: 0.3;
  }

  .doodle-sun {
    width: 180px;
    height: 180px;
    top: -40px;
    right: -40px;
  }

  /* Page 1: Picker */
  .picker-page-wrapper {
    padding: 8px 0;
  }

  .picker-card {
    padding: 24px 16px;
    border-radius: var(--radius-md);
  }

  .school-badge-wrapper {
    padding: 8px 18px;
    margin-bottom: 16px;
  }

  .school-logo-img {
    max-width: 220px;
    max-height: 60px;
  }

  .picker-title {
    font-size: 1.65rem;
    margin-bottom: 6px;
    word-break: break-word;
  }

  .picker-subtitle {
    font-size: 0.95rem;
    margin-bottom: 24px;
    word-break: break-word;
  }

  .step-section {
    margin-bottom: 22px;
  }

  .step-label {
    font-size: 1.05rem;
    margin-bottom: 12px;
  }

  .step-number {
    width: 26px;
    height: 26px;
    font-size: 0.85rem;
  }

  .grades-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .grade-btn {
    padding: 12px 6px;
  }

  .grade-btn .grade-num {
    font-size: 1.4rem;
  }

  .grade-btn .grade-text {
    font-size: 0.75rem;
  }

  .classes-grid {
    grid-template-columns: repeat(auto-fill, minmax(75px, 1fr));
    gap: 8px;
  }

  .class-btn {
    padding: 12px 8px;
    font-size: 1.25rem;
  }

  .go-class-btn {
    padding: 15px 18px;
    font-size: 1.15rem;
    margin-top: 10px;
  }

  /* Page 2: Portal Header */
  .portal-header {
    flex-direction: column;
    align-items: stretch;
    padding: 14px 12px;
    gap: 12px;
    margin-bottom: 18px;
  }

  .header-brand {
    justify-content: flex-start;
    gap: 12px;
  }

  .header-logo-img {
    height: 40px;
    max-width: 140px;
  }

  .header-brand-text h1 {
    font-size: 1.15rem;
    word-break: break-word;
  }

  .header-brand-text p {
    font-size: 0.78rem;
  }

  .header-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    justify-content: flex-start;
    width: 100%;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
  }

  .class-pill,
  .share-class-btn,
  .topbar-test-clock-btn,
  .live-clock-badge {
    font-size: 0.8rem;
    padding: 6px 10px;
  }

  /* Page 2: Spotlight Card */
  .spotlight-card {
    padding: 18px 14px;
    margin-bottom: 20px;
    border-radius: var(--radius-md);
  }

  .spotlight-banner {
    font-size: 0.78rem;
    padding: 5px 11px;
    margin-bottom: 12px;
  }

  .spotlight-content {
    flex-direction: column;
    gap: 18px;
  }

  .spotlight-subject-row {
    gap: 10px;
  }

  .spotlight-subject-icon {
    width: 44px;
    height: 44px;
    font-size: 22px;
    border-radius: 12px;
  }

  .spotlight-subject-title {
    font-size: 1.45rem;
    word-break: break-word;
  }

  .spotlight-teacher-name {
    font-size: 0.98rem;
    word-break: break-word;
  }

  .spotlight-meta-chips {
    gap: 6px;
  }

  .meta-chip {
    font-size: 0.8rem;
    padding: 4px 9px;
  }

  .spotlight-action-box {
    width: 100%;
    min-width: 0;
  }

  .join-now-cta {
    font-size: 1.1rem;
    padding: 14px 18px;
    width: 100%;
  }

  .join-web-cta {
    width: 100%;
    padding: 9px 12px;
    font-size: 0.82rem;
  }

  .countdown-timer {
    font-size: 1.6rem;
  }

  /* Page 2: Schedule Timetable Header & Tabs */
  .schedule-section-header {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin-bottom: 14px;
  }

  .schedule-heading {
    font-size: 1.2rem;
  }

  .day-tabs {
    width: 100%;
    border-radius: var(--radius-md);
    padding: 3px;
    gap: 3px;
    overflow-x: auto;
  }

  .day-tab-btn {
    padding: 7px 12px;
    font-size: 0.82rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  /* Page 2: Session Cards (Stacked Responsive Card) */
  .session-card, .period-card {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 12px;
    border-radius: var(--radius-md);
  }

  .period-time-col {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 8px;
    border-bottom: 1px dashed #E2E8F0;
    width: 100%;
  }

  .period-badge {
    font-size: 0.9rem;
  }

  .period-time-text {
    font-size: 0.78rem;
  }

  .period-info-col {
    gap: 10px;
    width: 100%;
    min-width: 0;
  }

  .period-subject-icon {
    width: 38px;
    height: 38px;
    font-size: 18px;
    border-radius: 10px;
    flex-shrink: 0;
  }

  .period-details {
    min-width: 0;
    flex: 1;
  }

  .period-subject-title {
    font-size: 1.05rem;
    word-break: break-word;
  }

  .period-teacher {
    font-size: 0.82rem;
    white-space: normal;
    word-break: break-word;
  }

  .period-action-col {
    width: 100%;
    justify-content: stretch;
    padding-top: 4px;
  }

  .status-badge {
    width: 100%;
    justify-content: center;
    text-align: center;
    padding: 7px 10px;
    font-size: 0.82rem;
  }

  .schedule-break-banner {
    padding: 8px 12px;
    font-size: 0.8rem;
  }

  /* Teacher Tools & Modals */
  .test-clock-drawer {
    bottom: 64px;
    right: 10px;
    left: 10px;
    width: auto;
    max-width: calc(100vw - 20px);
    padding: 16px 14px;
    max-height: calc(100vh - 75px);
    border-radius: var(--radius-md);
  }

  .drawer-actions-row {
    flex-direction: column;
    gap: 6px;
  }

  .drawer-action-btn {
    width: 100%;
  }

  .test-clock-fab {
    bottom: 12px;
    right: 12px;
    padding: 7px 12px;
    font-size: 0.8rem;
  }

  .friendly-modal {
    padding: 22px 14px;
    border-radius: var(--radius-md);
    max-width: calc(100vw - 24px);
    max-height: calc(100vh - 32px);
  }

  .modal-mascot-icon {
    width: 54px;
    height: 54px;
    font-size: 26px;
    margin-bottom: 12px;
  }

  .modal-title {
    font-size: 1.25rem;
  }

  .modal-body-text {
    font-size: 0.92rem;
    margin-bottom: 14px;
  }

  .modal-btn-row {
    flex-direction: column;
    gap: 8px;
    width: 100%;
  }

  .modal-btn-row .btn-secondary,
  .modal-btn-row .btn-primary {
    width: 100%;
    flex: none;
    padding: 11px 14px;
  }
}

/* --------------------------------------------------------------------------
   4. Extra Small Phones (max-width: 480px)
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
  .app-container {
    padding: 10px 8px 65px;
  }

  .picker-card {
    padding: 18px 12px;
  }

  .picker-title {
    font-size: 1.42rem;
  }

  .picker-subtitle {
    font-size: 0.88rem;
    margin-bottom: 18px;
  }

  .school-logo-img {
    max-width: 180px;
    max-height: 50px;
  }

  .grades-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }

  .grade-btn {
    padding: 10px 4px;
  }

  .grade-btn .grade-num {
    font-size: 1.25rem;
  }

  .grade-btn .grade-text {
    font-size: 0.7rem;
  }

  .classes-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }

  .class-btn {
    padding: 10px 6px;
    font-size: 1.15rem;
  }

  .go-class-btn {
    padding: 13px 14px;
    font-size: 1.05rem;
  }

  .header-actions {
    gap: 6px;
  }

  .class-pill,
  .share-class-btn,
  .topbar-test-clock-btn,
  .live-clock-badge {
    font-size: 0.74rem;
    padding: 5px 8px;
  }

  .spotlight-subject-title {
    font-size: 1.28rem;
  }

  .credential-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .credential-value {
    font-size: 0.78rem;
    width: 100%;
  }

  .test-presets-grid {
    grid-template-columns: 1fr;
  }

  .toast-notice {
    font-size: 0.82rem;
    padding: 8px 14px;
    max-width: calc(100vw - 20px);
  }
}