/* ============================================
   エホンリウムガイド養成アプリ - スタイルシート
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Zen+Maru+Gothic:wght@400;500;700&family=Noto+Sans+JP:wght@400;500;700&display=swap');

/* --- CSS Variables --- */
:root {
  --color-primary: #6B8E4E;
  --color-primary-light: #8AAF6A;
  --color-primary-dark: #4A6B34;
  --color-cream: #FBF8F0;
  --color-cream-dark: #F0EAD6;
  --color-warm-white: #FFFDF7;
  --color-gold: #D4A843;
  --color-gold-light: #E8C97A;
  --color-pink: #E8B4B8;
  --color-pink-light: #F5D5D8;
  --color-blue: #8BB8D4;
  --color-blue-light: #B5D5E8;
  --color-text: #4A4A3F;
  --color-text-light: #7A7A6E;
  --color-text-muted: #A0A090;
  --color-border: #E0DDD0;
  --color-shadow: rgba(106, 142, 78, 0.12);
  --color-danger: #D46B6B;
  --color-success: #6B8E4E;

  /* Level colors */
  --level-1: #C5D4A0;
  --level-2: #A8C97F;
  --level-3: #7FB069;
  --level-4: #E8B4B8;
  --level-5: #8BB8D4;
  --level-6: #D4A843;
  --level-7: #B8860B;

  --font-display: 'Zen Maru Gothic', serif;
  --font-body: 'Noto Sans JP', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px var(--color-shadow);
  --shadow-md: 0 4px 16px var(--color-shadow);
  --shadow-lg: 0 8px 32px var(--color-shadow);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-cream);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.4;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  cursor: pointer;
  font-family: var(--font-display);
  border: none;
  outline: none;
  transition: all var(--transition);
}

input, textarea, select {
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

/* --- Layout --- */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-sm {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- Auth Pages (Login/Register) --- */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-cream) 0%, var(--color-cream-dark) 100%);
  position: relative;
  overflow: hidden;
}

.auth-page::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 80%;
  height: 150%;
  background: radial-gradient(ellipse, rgba(107, 142, 78, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.auth-card {
  background: var(--color-warm-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
}

.auth-logo {
  width: 100px;
  height: 100px;
  margin: 0 auto 8px;
  object-fit: contain;
}

.auth-title {
  text-align: center;
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.auth-subtitle {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.auth-illustration {
  position: fixed;
  bottom: -20px;
  right: -40px;
  width: 280px;
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

/* --- Form Styles --- */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-light);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-warm-white);
  color: var(--color-text);
  font-size: 1rem;
}

.form-input:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(107, 142, 78, 0.12);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

textarea.form-input {
  resize: vertical;
  min-height: 80px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 2px 8px rgba(107, 142, 78, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(107, 142, 78, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background: rgba(107, 142, 78, 0.08);
}

.btn-gold {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
  color: white;
  box-shadow: 0 2px 8px rgba(212, 168, 67, 0.3);
}

.btn-gold:hover {
  box-shadow: 0 4px 16px rgba(212, 168, 67, 0.4);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--color-danger);
  color: white;
}

.btn-danger:hover {
  opacity: 0.9;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.1rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* --- Header / Navigation --- */
.header {
  background: var(--color-warm-white);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-logo img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.header-logo span {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-user {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.header-user strong {
  color: var(--color-text);
}

.btn-logout {
  background: none;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.btn-logout:hover {
  color: var(--color-danger);
  border-color: var(--color-danger);
}

/* --- Dashboard --- */
.dashboard {
  padding: 24px 0 60px;
}

/* Level Badge Area */
.level-section {
  text-align: center;
  padding: 32px 0 24px;
}

.level-badge {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  position: relative;
}

.level-icon-wrap {
  position: relative;
  width: 140px;
  height: 140px;
}

.level-icon-bg {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: all 0.5s ease;
  position: relative;
  overflow: hidden;
}

.level-icon-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.level-ring {
  position: absolute;
  top: -4px;
  left: -4px;
  width: 148px;
  height: 148px;
  border-radius: 50%;
  border: 3px solid;
  border-color: var(--level-1);
  transition: border-color 0.5s ease;
}

.level-emoji {
  font-size: 3.5rem;
  line-height: 1;
}

.level-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
}

.level-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: -4px;
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--color-warm-white);
  border-radius: var(--radius-lg);
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

/* Progress Section */
.progress-section {
  background: var(--color-warm-white);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.progress-title {
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.progress-row {
  margin-bottom: 16px;
}

.progress-row:last-child {
  margin-bottom: 0;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
  font-size: 0.85rem;
}

.progress-label-text {
  color: var(--color-text-light);
}

.progress-label-value {
  font-weight: 700;
  color: var(--color-primary);
}

.progress-bar-bg {
  height: 12px;
  background: var(--color-cream-dark);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
  transition: width 1s ease;
  position: relative;
}

.progress-bar-fill.gold {
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Encouragement Message */
.encouragement {
  background: linear-gradient(135deg, var(--color-cream), var(--color-warm-white));
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
  text-align: center;
  border: 2px dashed var(--color-border);
  position: relative;
  overflow: hidden;
}

.encouragement-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.encouragement-text {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.8;
}

.encouragement-img {
  position: absolute;
  bottom: -10px;
  right: -10px;
  width: 80px;
  opacity: 0.2;
  pointer-events: none;
}

/* Action Buttons */
.action-section {
  margin-bottom: 32px;
  text-align: center;
}

.btn-record {
  padding: 16px 40px;
  font-size: 1.1rem;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
  box-shadow: 0 4px 20px rgba(107, 142, 78, 0.35);
}

.btn-record:hover {
  box-shadow: 0 6px 28px rgba(107, 142, 78, 0.5);
  transform: translateY(-2px);
}

.btn-record .btn-icon {
  font-size: 1.3rem;
}

/* Session History */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.section-title {
  font-size: 1.1rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.session-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.session-card {
  background: var(--color-warm-white);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: box-shadow var(--transition);
}

.session-card:hover {
  box-shadow: var(--shadow-md);
}

.session-photo {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--color-cream-dark);
  border: 1px solid var(--color-border);
}

.session-photo-placeholder {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  background: var(--color-cream-dark);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.session-info {
  flex: 1;
  min-width: 0;
}

.session-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.session-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.session-participants {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.session-number {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background: var(--color-cream-dark);
  padding: 2px 8px;
  border-radius: 10px;
}

.session-notes {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

.session-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.btn-icon-sm {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  background: var(--color-cream);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.btn-icon-sm:hover {
  background: var(--color-cream-dark);
  color: var(--color-text);
}

.btn-icon-sm.delete:hover {
  background: #FDE8E8;
  color: var(--color-danger);
  border-color: var(--color-danger);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state-text {
  font-family: var(--font-display);
  font-size: 1rem;
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-warm-white);
  border-radius: var(--radius-xl);
  padding: 32px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.95);
  transition: all var(--transition);
  box-shadow: var(--shadow-lg);
}

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

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.modal-title {
  font-size: 1.2rem;
  color: var(--color-primary);
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-cream);
  color: var(--color-text-muted);
  font-size: 1.2rem;
}

.modal-close:hover {
  background: var(--color-cream-dark);
  color: var(--color-text);
}

/* Photo Upload */
.photo-upload {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--color-cream);
  position: relative;
  overflow: hidden;
}

.photo-upload:hover {
  border-color: var(--color-primary-light);
  background: rgba(107, 142, 78, 0.04);
}

.photo-upload.has-photo {
  padding: 0;
  border-style: solid;
  border-color: var(--color-primary-light);
}

.photo-upload-icon {
  font-size: 2.5rem;
  margin-bottom: 8px;
}

.photo-upload-text {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.photo-upload-hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.photo-preview {
  width: 100%;
  max-height: 300px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.photo-remove {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0,0,0,0.5);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

#photo-input {
  display: none;
}

/* --- Celebration Modal --- */
.celebration {
  text-align: center;
  padding: 20px 0;
}

.celebration-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  animation: bounce 0.6s ease infinite alternate;
}

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

.celebration-title {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.celebration-message {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 16px;
}

.celebration-level-up {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius-lg);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  margin-bottom: 16px;
  box-shadow: 0 4px 16px rgba(212, 168, 67, 0.3);
}

.celebration-img {
  width: 120px;
  margin: 16px auto;
  opacity: 0.9;
}

/* Confetti */
.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2000;
  overflow: hidden;
}

.confetti {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  animation: confetti-fall linear forwards;
}

@keyframes confetti-fall {
  0% {
    transform: translateY(-10vh) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(110vh) rotate(720deg);
    opacity: 0;
  }
}

/* --- Admin Dashboard --- */
.admin-gate {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-cream) 0%, var(--color-cream-dark) 100%);
}

.admin-password-card {
  background: var(--color-warm-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: 40px;
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.admin-password-card h2 {
  color: var(--color-primary);
  margin-bottom: 8px;
}

.admin-password-card p {
  color: var(--color-text-light);
  font-size: 0.85rem;
  margin-bottom: 24px;
}

/* Admin Content */
.admin-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.admin-stat {
  background: var(--color-warm-white);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.admin-stat-value {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.admin-stat-label {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

/* Guide List */
.guide-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.guide-card {
  background: var(--color-warm-white);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: box-shadow var(--transition);
  cursor: pointer;
}

.guide-card:hover {
  box-shadow: var(--shadow-md);
}

.guide-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.guide-info {
  flex: 1;
  min-width: 0;
}

.guide-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
}

.guide-email {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.guide-stats {
  display: flex;
  gap: 16px;
  margin-top: 6px;
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.guide-level-tag {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-display);
  white-space: nowrap;
}

/* Guide Detail */
.guide-detail-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.guide-detail-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  flex-shrink: 0;
}

.guide-detail-name {
  font-size: 1.3rem;
}

.guide-detail-meta {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* --- Trainer Achievement Banner --- */
.trainer-banner {
  background: linear-gradient(135deg, #2C1810, #4A2F1A);
  border-radius: var(--radius-xl);
  padding: 32px;
  margin-bottom: 24px;
  text-align: center;
  color: white;
  position: relative;
  overflow: hidden;
}

.trainer-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(212, 168, 67, 0.2), transparent 60%);
}

.trainer-banner-icon {
  font-size: 3rem;
  margin-bottom: 8px;
  position: relative;
}

.trainer-banner-title {
  font-size: 1.5rem;
  font-family: var(--font-display);
  color: var(--color-gold-light);
  position: relative;
}

.trainer-banner-text {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
  margin-top: 4px;
  position: relative;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--color-cream-dark);
  padding: 4px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.tab {
  flex: 1;
  padding: 10px 16px;
  text-align: center;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-light);
  background: transparent;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.tab.active {
  background: var(--color-warm-white);
  color: var(--color-primary);
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

.tab:hover:not(.active) {
  color: var(--color-text);
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--color-warm-white);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  min-width: 280px;
  max-width: 400px;
  animation: slideIn 0.3s ease;
  border-left: 4px solid var(--color-primary);
}

.toast.error {
  border-left-color: var(--color-danger);
}

.toast.success {
  border-left-color: var(--color-success);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* --- Loading --- */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-cream-dark);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* --- Link styles --- */
.auth-link {
  text-align: center;
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.auth-link a {
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.admin-link {
  text-align: center;
  margin-top: 16px;
}

.admin-link a {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* --- Error Message --- */
.error-message {
  color: var(--color-danger);
  font-size: 0.85rem;
  margin-top: 8px;
  text-align: center;
  display: none;
}

.error-message.show {
  display: block;
}

/* --- Photo Gallery in Session Detail --- */
.session-photos {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.session-photo-thumb {
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: transform var(--transition);
}

.session-photo-thumb:hover {
  transform: scale(1.05);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .auth-card {
    padding: 32px 24px;
    margin: 16px;
  }

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

  .stat-card {
    padding: 14px 8px;
  }

  .stat-value {
    font-size: 1.5rem;
  }

  .stat-label {
    font-size: 0.7rem;
  }

  .session-card {
    flex-direction: column;
  }

  .session-photo,
  .session-photo-placeholder {
    width: 100%;
    height: 160px;
  }

  .session-actions {
    align-self: flex-end;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 8px;
  }

  .header-nav {
    gap: 8px;
  }

  .header-user {
    font-size: 0.75rem;
  }

  .guide-card {
    flex-wrap: wrap;
  }

  .guide-detail-header {
    flex-direction: column;
    text-align: center;
  }

  .modal {
    padding: 24px;
  }

  .admin-overview {
    grid-template-columns: repeat(2, 1fr);
  }

  .level-icon-wrap {
    width: 120px;
    height: 120px;
  }

  .level-icon-bg {
    width: 120px;
    height: 120px;
  }

  .level-ring {
    width: 128px;
    height: 128px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .auth-illustration {
    width: 180px;
  }

  .admin-overview {
    grid-template-columns: 1fr 1fr;
  }

  .tabs {
    flex-wrap: wrap;
  }
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.hidden { display: none !important; }
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}