/* ==========================================================================
   BÉ NGOAN & BUỔI HỌC - KID & PARENT FRIENDLY DESIGN SYSTEM
   Theme: Pastel Macaron, Clean & Decluttered, Highly Intuitive UX
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@500;600;700;800&family=Nunito:wght@600;700;800;900&display=swap');

:root {
  /* Color Palette - Curated pastel tones */
  --primary: #FF5A79;
  --primary-hover: #E64363;
  --primary-soft: #FFF0F4;
  --primary-border: #FFD4DE;

  --secondary: #2563EB;
  --secondary-hover: #1D4ED8;
  --secondary-soft: #EFF6FF;
  --secondary-border: #BFDBFE;

  --accent: #F59E0B;
  --accent-soft: #FEF3C7;
  --accent-border: #FDE68A;

  --mint: #10B981;
  --mint-hover: #059669;
  --mint-soft: #ECFDF5;
  --mint-border: #A7F3D0;

  --orange: #F97316;
  --orange-soft: #FFF7ED;
  --orange-border: #FED7AA;

  --purple: #8B5CF6;
  --purple-soft: #F5F3FF;
  --purple-border: #DDD6FE;

  --gray-dark: #1E293B;
  --gray-medium: #64748B;
  --gray-light: #94A3B8;
  --bg-page: #F8FAFC;
  --card-bg: #FFFFFF;
  --card-border: #E2E8F0;

  /* Elevation Shadows */
  --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 4px 10px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.10);
  --shadow-star: 0 6px 16px rgba(245, 158, 11, 0.35);

  /* Rounded Radii */
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* Typography */
  --font-main: 'Quicksand', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Nunito', 'Quicksand', sans-serif;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-page);
  color: var(--gray-dark);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-image: radial-gradient(#E2E8F0 1.2px, transparent 1.2px);
  background-size: 28px 28px;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Confetti Canvas */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 99999;
}

/* ==========================================================================
   APP HEADER & NAVIGATION
   ========================================================================== */
.app-header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-xs);
  padding: 0.85rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-mascot {
  font-size: 2rem;
  background: var(--accent-soft);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-star);
  animation: floatMascot 3s ease-in-out infinite alternate;
}

@keyframes floatMascot {
  0% { transform: translateY(0) rotate(-3deg); }
  100% { transform: translateY(-4px) rotate(3deg); }
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  letter-spacing: -0.3px;
}

.brand-badge {
  font-size: 0.7rem;
  background: var(--accent-soft);
  color: #92400E;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-weight: 800;
  border: 1px solid var(--accent-border);
}

.brand-sub {
  font-size: 0.82rem;
  color: var(--gray-medium);
  font-weight: 600;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

/* Role Selector Pill */
.role-pill-box {
  background: #F1F5F9;
  padding: 0.25rem;
  border-radius: var(--radius-full);
  display: flex;
  gap: 0.25rem;
  border: 1px solid var(--card-border);
}

.role-btn {
  border: none;
  background: transparent;
  padding: 0.55rem 1.15rem;
  font-family: var(--font-main);
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  color: var(--gray-dark);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}

.role-btn:hover {
  background: rgba(255, 255, 255, 0.7);
}

.role-btn.active {
  background: #ffffff;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  font-weight: 800;
}

/* Class Selector Dropdown */
.class-select-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.class-select-wrap select {
  font-family: var(--font-main);
  font-size: 0.92rem;
  font-weight: 700;
  padding: 0.55rem 2.2rem 0.55rem 1rem;
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-full);
  background-color: #ffffff;
  color: var(--gray-dark);
  cursor: pointer;
  outline: none;
  transition: all 0.2s;
  appearance: none;
  -webkit-appearance: none;
}

.class-select-wrap select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 90, 121, 0.15);
}

.class-select-arrow {
  position: absolute;
  right: 0.85rem;
  pointer-events: none;
  color: var(--primary);
  font-size: 0.8rem;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  font-family: var(--font-main);
  font-size: 0.92rem;
  font-weight: 800;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-decoration: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(255, 90, 121, 0.3);
}

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

.btn-secondary {
  background: var(--secondary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

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

.btn-mint {
  background: var(--mint);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
}

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

.btn-accent {
  background: var(--accent);
  color: #ffffff;
  box-shadow: var(--shadow-star);
}

.btn-accent:hover {
  transform: translateY(-1px);
}

.btn-outline {
  background: #ffffff;
  border: 1.5px solid var(--card-border);
  color: var(--gray-dark);
}

.btn-outline:hover {
  background: #F8FAFC;
  border-color: var(--gray-medium);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

/* ==========================================================================
   TEACHER SUB-NAVIGATION TABS (Gọn gàng, hết rối mắt)
   ========================================================================== */
.teacher-subtabs {
  display: flex;
  gap: 0.5rem;
  margin: 1.25rem 0 1rem 0;
  border-bottom: 2px solid var(--card-border);
  padding-bottom: 0.5rem;
  overflow-x: auto;
}

.subtab-btn {
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 800;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--gray-medium);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s;
  white-space: nowrap;
}

.subtab-btn:hover {
  background: #F1F5F9;
  color: var(--gray-dark);
}

.subtab-btn.active {
  background: #ffffff;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  font-weight: 800;
}

/* ==========================================================================
   TEACHER TOOLBAR & HERO
   ========================================================================== */
.teacher-toolbar {
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  box-shadow: var(--shadow-xs);
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.class-badge-pill {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 800;
  font-size: 0.85rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
}

.toolbar-actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

/* Stats Ribbon */
.stats-ribbon {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.stat-card {
  background: #ffffff;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-xs);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: transform 0.2s;
}

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.stat-card.present .stat-icon { background: var(--mint-soft); }
.stat-card.late .stat-icon { background: var(--orange-soft); }
.stat-card.excused .stat-icon { background: var(--purple-soft); }
.stat-card.absent .stat-icon { background: var(--primary-soft); }

.stat-info .stat-val {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--gray-dark);
  line-height: 1.2;
}

.stat-info .stat-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gray-medium);
}

/* Search and Filter Row */
.filter-search-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.search-input-box {
  position: relative;
  flex-grow: 1;
  max-width: 360px;
}

.search-input-box input {
  width: 100%;
  padding: 0.55rem 1rem 0.55rem 2.2rem;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--card-border);
  outline: none;
  font-family: var(--font-main);
  font-size: 0.88rem;
  font-weight: 600;
  background: #ffffff;
}

.search-input-box input:focus {
  border-color: var(--primary);
}

.search-icon-pos {
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-light);
  font-size: 0.88rem;
}

/* ==========================================================================
   STUDENT CARDS GRID (Sạch sẽ, trực quan, dễ bấm)
   ========================================================================== */
.student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.student-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--card-border);
  box-shadow: var(--shadow-xs);
  padding: 1rem;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  position: relative;
}

.student-card:hover {
  border-color: #CBD5E1;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Card Header */
.card-header-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.student-avatar {
  width: 48px;
  height: 48px;
  background: var(--bg-page);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.65rem;
  border: 1px solid var(--card-border);
  flex-shrink: 0;
}

.student-name-block {
  flex-grow: 1;
  overflow: hidden;
}

.student-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--gray-dark);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.student-nickname {
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 700;
  background: var(--primary-soft);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
}

.student-parent-info {
  font-size: 0.78rem;
  color: var(--gray-medium);
  font-weight: 600;
  margin-top: 0.1rem;
}

.student-stars-badge {
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 900;
  font-size: 0.9rem;
  color: #92400E;
}

/* 1-Tap Attendance Buttons */
.attendance-pills {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.3rem;
  margin-bottom: 0.75rem;
  background: #F8FAFC;
  padding: 0.3rem;
  border-radius: var(--radius-sm);
}

.att-pill {
  border: none;
  background: transparent;
  padding: 0.45rem 0.2rem;
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  color: var(--gray-medium);
}

.att-pill .pill-icon {
  font-size: 1.1rem;
}

.att-pill:hover {
  background: #ffffff;
  color: var(--gray-dark);
}

/* Selected states */
.att-pill[data-val="present"].active {
  background: var(--mint);
  color: #ffffff;
  font-weight: 800;
}

.att-pill[data-val="late"].active {
  background: var(--orange);
  color: #ffffff;
  font-weight: 800;
}

.att-pill[data-val="excused"].active {
  background: var(--purple);
  color: #ffffff;
  font-weight: 800;
}

.att-pill[data-val="absent"].active {
  background: var(--primary);
  color: #ffffff;
  font-weight: 800;
}

/* Sub-info Note */
.att-details-note {
  font-size: 0.76rem;
  color: var(--gray-medium);
  background: #F8FAFC;
  padding: 0.35rem 0.55rem;
  border-radius: var(--radius-xs);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.att-details-note .source-tag {
  font-weight: 700;
  color: var(--secondary);
}

/* Card Actions */
.card-actions-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
  margin-top: auto;
}

.btn-card-action {
  font-family: var(--font-main);
  font-size: 0.82rem;
  font-weight: 800;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  transition: all 0.15s;
}

.btn-give-star {
  background: var(--accent-soft);
  color: #92400E;
  border-color: var(--accent-border);
}

.btn-give-star:hover {
  background: #FDE68A;
}

.btn-give-feedback {
  background: var(--secondary-soft);
  color: var(--secondary);
  border-color: var(--secondary-border);
}

.btn-give-feedback:hover {
  background: #DBEAFE;
}

/* ==========================================================================
   CLASS & STUDENT MANAGEMENT VIEW (QUẢN LÝ LỚP & HỌC SINH)
   ========================================================================== */
.roster-card-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
}

.roster-card {
  background: #ffffff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-xs);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.roster-student-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.roster-avatar {
  font-size: 1.8rem;
  width: 46px;
  height: 46px;
  background: var(--bg-page);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.roster-actions {
  display: flex;
  gap: 0.4rem;
}

.btn-icon-action {
  border: 1px solid var(--card-border);
  background: #ffffff;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-icon-action:hover {
  background: #F1F5F9;
  border-color: var(--gray-medium);
}

/* ==========================================================================
   LEADERBOARD & REWARDS (BẢNG SAO & ĐỔI QUÀ)
   ========================================================================== */
.leaderboard-list {
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
}

.leaderboard-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--card-border);
  gap: 1rem;
}

.leaderboard-item:last-child {
  border-bottom: none;
}

.rank-badge {
  font-weight: 900;
  font-size: 1.1rem;
  width: 32px;
  text-align: center;
}

.rank-1 { color: #F59E0B; }
.rank-2 { color: #64748B; }
.rank-3 { color: #B45309; }

/* ==========================================================================
   PARENT PORTAL (Góc Phụ Huynh & Bé)
   ========================================================================== */
.parent-dashboard {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1.25rem;
  margin-top: 1.25rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 900px) {
  .parent-dashboard {
    grid-template-columns: 1fr;
  }
}

.kid-profile-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
  text-align: center;
}

.kid-big-avatar {
  width: 88px;
  height: 88px;
  background: var(--bg-page);
  border-radius: var(--radius-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 3.2rem;
  box-shadow: var(--shadow-sm);
  border: 2px solid var(--card-border);
  margin-bottom: 0.75rem;
}

.kid-name {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--gray-dark);
}

.kid-class-tag {
  display: inline-block;
  background: var(--secondary-soft);
  color: var(--secondary);
  font-weight: 800;
  font-size: 0.82rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin: 0.3rem 0 1rem 0;
}

.kid-switcher-list {
  display: flex;
  gap: 0.4rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--card-border);
}

.kid-switch-pill {
  border: 1px solid var(--card-border);
  background: #ffffff;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: all 0.15s;
}

.kid-switch-pill.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* Today status hero card */
.today-status-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
}

.today-status-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.status-badge-lg {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius-full);
  font-weight: 900;
  font-size: 1rem;
}

.status-badge-lg.present {
  background: var(--mint-soft);
  color: var(--mint);
  border: 1px solid var(--mint-border);
}

.status-badge-lg.late {
  background: var(--orange-soft);
  color: var(--orange);
  border: 1px solid var(--orange-border);
}

.status-badge-lg.excused {
  background: var(--purple-soft);
  color: var(--purple);
  border: 1px solid var(--purple-border);
}

.status-badge-lg.absent {
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.today-meta-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.9rem;
  color: var(--gray-dark);
  font-weight: 600;
  margin-bottom: 1.25rem;
  background: #F8FAFC;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
}

.today-meta-list li {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Star Vault */
.star-vault-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--accent-border);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
  margin-top: 1.25rem;
}

.progress-track {
  height: 18px;
  background: #E2E8F0;
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #F59E0B, #F97316);
  border-radius: var(--radius-full);
  transition: width 0.6s ease;
}

.eval-report-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
  margin-top: 1.25rem;
}

.eval-criteria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
}

.criteria-pill {
  background: #F8FAFC;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  text-align: center;
}

.criteria-pill .crit-name {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gray-medium);
  margin-bottom: 0.25rem;
}

.criteria-pill .crit-stars {
  color: #F59E0B;
  font-size: 1.1rem;
  letter-spacing: 1px;
}

.teacher-letter-box {
  background: var(--primary-soft);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 0.85rem 1rem;
  font-size: 0.92rem;
  line-height: 1.5;
  color: #881337;
  font-weight: 600;
}

.teacher-letter-box::before {
  content: '💌 Lời nhắn từ cô giáo:';
  display: block;
  font-weight: 800;
  font-size: 0.82rem;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

/* ==========================================================================
   MODALS
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  z-index: 5000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

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

.modal-box {
  background: #ffffff;
  width: 100%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--card-border);
  overflow: hidden;
  transform: scale(0.95);
  transition: transform 0.2s ease;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.modal-backdrop.open .modal-box {
  transform: scale(1);
}

.modal-header {
  background: #F8FAFC;
  padding: 1.15rem 1.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--card-border);
}

.modal-header h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--gray-dark);
}

.modal-close-btn {
  border: none;
  background: #ffffff;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--gray-medium);
  cursor: pointer;
  border: 1px solid var(--card-border);
}

.modal-body {
  padding: 1.25rem 1.35rem;
  overflow-y: auto;
}

.modal-footer {
  padding: 0.85rem 1.35rem;
  background: #F8FAFC;
  border-top: 1px solid var(--card-border);
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-weight: 800;
  font-size: 0.88rem;
  color: var(--gray-dark);
  margin-bottom: 0.35rem;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  font-family: var(--font-main);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.65rem 0.85rem;
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--gray-dark);
  outline: none;
  transition: all 0.15s;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 90, 121, 0.15);
}

.badge-selector-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.4rem;
  margin-bottom: 0.85rem;
}

.badge-option-btn {
  border: 1.5px solid var(--card-border);
  background: #ffffff;
  padding: 0.55rem 0.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--gray-dark);
}

.badge-option-btn.selected {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary);
}

.quick-tag-bubbles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.45rem;
}

.quick-bubble {
  border: 1px solid var(--card-border);
  background: #F8FAFC;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gray-dark);
  cursor: pointer;
}

.quick-bubble:hover {
  background: #F1F5F9;
}

.quick-bubble.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.star-click-row {
  display: flex;
  gap: 0.35rem;
  font-size: 1.45rem;
  cursor: pointer;
}

.star-click-item {
  color: #CBD5E1;
  transition: color 0.1s;
}

.star-click-item.filled {
  color: #F59E0B;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  background: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.75rem 1.15rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 0.9rem;
  border-left: 4px solid var(--primary);
  animation: slideInToast 0.25s ease;
  pointer-events: auto;
  max-width: 360px;
}

.toast.success { border-left-color: var(--mint); }
.toast.info { border-left-color: var(--secondary); }
.toast.warning { border-left-color: var(--orange); }

@keyframes slideInToast {
  0% { transform: translateX(100%); opacity: 0; }
  100% { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   LOUD URGENT ALERT: NHẮC NHỞ LÊN KẾ HOẠCH BUỔI HỌC (RẦM RỘ)
   ========================================================================== */
.urgent-session-alert {
  background: linear-gradient(135deg, #FFF1F2 0%, #FFFBEB 50%, #FFF1F2 100%);
  border: 2px solid #F43F5E;
  border-radius: var(--radius-md);
  padding: 1.1rem 1.4rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 0 20px rgba(244, 63, 94, 0.25);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  animation: urgentPulse 2s infinite ease-in-out;
  position: relative;
  overflow: hidden;
}

@keyframes urgentPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.4);
    border-color: #F43F5E;
  }
  50% {
    box-shadow: 0 0 24px 6px rgba(244, 63, 94, 0.35);
    border-color: #FB7185;
  }
  100% {
    box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.4);
    border-color: #F43F5E;
  }
}

.alert-icon-shake {
  font-size: 2.4rem;
  width: 54px;
  height: 54px;
  background: #ffffff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid #FDA4AF;
  box-shadow: 0 4px 10px rgba(244, 63, 94, 0.2);
  animation: ringAlarm 0.8s infinite ease-in-out;
  flex-shrink: 0;
}

@keyframes ringAlarm {
  0% { transform: rotate(0) scale(1); }
  15% { transform: rotate(-14deg) scale(1.1); }
  30% { transform: rotate(14deg) scale(1.1); }
  45% { transform: rotate(-10deg) scale(1.1); }
  60% { transform: rotate(10deg) scale(1.1); }
  75% { transform: rotate(-4deg) scale(1.05); }
  100% { transform: rotate(0) scale(1); }
}

.alert-text-block {
  flex-grow: 1;
}

.alert-headline {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 900;
  color: #BE123C;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  letter-spacing: -0.2px;
}

.alert-sub {
  font-size: 0.88rem;
  font-weight: 700;
  color: #9F1239;
  margin-top: 0.15rem;
}

.alert-cta-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.btn-urgent-alarm {
  background: linear-gradient(135deg, #E11D48 0%, #F43F5E 100%);
  color: #ffffff;
  font-weight: 900;
  font-size: 0.95rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 18px rgba(225, 29, 72, 0.4);
  border: none;
  cursor: pointer;
  animation: btnGlow 1.5s infinite alternate;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

@keyframes btnGlow {
  0% { transform: scale(1); filter: brightness(1); }
  100% { transform: scale(1.04); filter: brightness(1.1); }
}

/* Green Planned Banner When Planned Ahead */
.session-planned-banner {
  background: #ECFDF5;
  border: 1.5px solid var(--mint-border);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.planned-title {
  font-weight: 800;
  font-size: 0.95rem;
  color: #065F46;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Pop-up Loud Alarm Modal Box */
.loud-alarm-modal-box {
  border: 3px solid #E11D48 !important;
  box-shadow: 0 0 35px rgba(225, 29, 72, 0.4) !important;
}

.loud-alarm-header {
  background: linear-gradient(135deg, #FFE4E6, #FEF3C7) !important;
  border-bottom: 2px solid #FDA4AF !important;
}

.loud-alarm-header h3 {
  color: #BE123C !important;
}

/* Level 1 Warning Banner: Khi mới chỉ lên 1 buổi */
.warning-session-alert {
  background: linear-gradient(135deg, #FFFBEB 0%, #FEF3C7 100%);
  border: 2px solid #F59E0B;
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.15);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Countdown Badge */
.countdown-badge {
  background: #FFF1F2;
  border: 1px solid #FDA4AF;
  color: #BE123C;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  animation: pulseCountdown 1.5s infinite alternate;
}

@keyframes pulseCountdown {
  0% { transform: scale(1); }
  100% { transform: scale(1.03); }
}

/* Quick-Plan 1-Click Buttons on Alert Banner */
.quick-plan-btn {
  background: #ffffff;
  border: 1.5px solid #FDA4AF;
  color: #BE123C;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 5px rgba(225, 29, 72, 0.1);
}

.quick-plan-btn:hover {
  background: #E11D48;
  color: #ffffff;
  border-color: #E11D48;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(225, 29, 72, 0.25);
}

/* Quick Plan Cards in Modal */
.quick-plan-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

@media (max-width: 580px) {
  .quick-plan-card-grid {
    grid-template-columns: 1fr;
  }
}

.quick-plan-card {
  background: #ffffff;
  border: 1.5px solid #FECDD3;
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.quick-plan-card:hover {
  border-color: #E11D48;
  background: #FFF1F2;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(225, 29, 72, 0.18);
}

.quick-plan-card .card-icon {
  font-size: 1.7rem;
  flex-shrink: 0;
}

.quick-plan-card .card-text {
  flex-grow: 1;
}

.quick-plan-card .card-title {
  font-size: 0.86rem;
  font-weight: 800;
  color: #BE123C;
  line-height: 1.25;
}

.quick-plan-card .card-sub {
  font-size: 0.74rem;
  color: #9F1239;
  margin-top: 0.1rem;
}

/* ==========================================================================
   ADMIN PORTAL STYLES (CỔNG QUẢN TRỊ VIÊN)
   ========================================================================== */
.admin-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  background: #ffffff;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.admin-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 900;
  color: #3730A3;
}

.admin-subtitle {
  font-size: 0.85rem;
  color: var(--gray-medium);
  margin-top: 0.15rem;
}

.admin-card-box {
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.admin-card-header {
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 0.75rem;
}

.admin-card-header h3 {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--gray-dark);
}

.admin-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 768px) {
  .admin-form-grid {
    grid-template-columns: 1fr;
  }
}

.admin-form-grid .full-width {
  grid-column: 1 / -1;
}

.avatar-pick-row {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.avatar-pill-btn {
  background: var(--gray-light);
  border: 1.5px solid transparent;
  font-size: 1.4rem;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.avatar-pill-btn:hover {
  background: #ffffff;
  border-color: #6366F1;
}

.avatar-pill-btn.active {
  background: #EEF2FF;
  border-color: #6366F1;
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.3);
  transform: scale(1.1);
}

.class-checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.5rem;
}

.class-checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: #ffffff;
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--card-border);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--gray-dark);
  cursor: pointer;
}

.class-checkbox-label input {
  accent-color: #6366F1;
}

.admin-teacher-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-teacher-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  background: var(--gray-light);
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--gray-dark);
  border-bottom: 2px solid var(--card-border);
}

.admin-teacher-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--card-border);
  vertical-align: middle;
}

.phone-badge {
  font-size: 0.88rem;
  font-weight: 800;
  color: #0369A1;
  background: #F0F9FF;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  border: 1px solid #BAE6FD;
}

.password-chip {
  font-family: monospace;
  font-size: 0.9rem;
  font-weight: 800;
  background: #F1F5F9;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  color: #475569;
  letter-spacing: 1px;
}

.teacher-classes-list {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.class-pill-mini {
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  color: #1D4ED8;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
}

.header-profile-chip {
  background: #ffffff;
  border: 1.5px solid var(--card-border);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--gray-dark);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  box-shadow: var(--shadow-sm);
}

/* Hộp Thông Tin Liên Hệ Cấp Tài Khoản */
.admin-contact-notice {
  background: #FFFBEB;
  border: 1.5px solid #FCD34D;
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.85rem;
  margin-top: 0.75rem;
  text-align: left;
}

.contact-pill-btn {
  font-size: 0.76rem;
  font-weight: 800;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: all 0.2s ease;
}

.contact-pill-btn.zalo {
  background: #0068FF;
  color: #ffffff;
}

.contact-pill-btn.call {
  background: #10B981;
  color: #ffffff;
}

.contact-pill-btn.fb {
  background: #1877F2;
  color: #ffffff;
}

.contact-pill-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
}