/* Base & Variables */
:root {
  /* Colors - Light Theme (Soft Blue & Green focus) */
  --bg-color: #f0f7f4;
  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --primary-color: #4299e1;
  /* Soft Blue */
  --secondary-color: #48bb78;
  /* Soft Green */
  --accent-color: #ed8936;
  /* Orange for highlights */
  --danger-color: #f56565;
  --card-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);

  /* Typography */
  --font-family: 'Outfit', 'M PLUS Rounded 1c', sans-serif;

  /* Radius & Spacing */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
}

.dark-mode {
  --bg-color: #1a202c;
  --text-primary: #e2e8f0;
  --text-secondary: #a0aec0;
  --card-bg: rgba(45, 55, 72, 0.6);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  --primary-color: #63b3ed;
  --secondary-color: #68d391;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* Glassmorphism utility */
.glassmorphism {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-lg);
}

/* Typography & Helpers */
h1,
h2,
h3,
h4 {
  font-weight: 700;
}

.text-center {
  text-align: center;
}

.text-accent {
  color: var(--secondary-color);
}

.text-orange {
  color: var(--accent-color);
}

.mt-sm {
  margin-top: var(--space-sm);
}

.mt-md {
  margin-top: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.w-100 {
  width: 100%;
}

/* Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 800px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  letter-spacing: -0.5px;
}

.icon-btn {
  background: transparent;
  border: none;
  font-size: 1.25rem;
  color: var(--text-primary);
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-full);
  transition: transform 0.2s, background 0.2s;
}

.icon-btn:hover {
  background: rgba(0, 0, 0, 0.05);
  transform: scale(1.1);
}

.dark-mode .icon-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Main Container & SPA Logic */
#app-container {
  flex: 1;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-md) var(--space-lg);
  width: 100%;
}

.view {
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.view.active {
  display: block;
  opacity: 1;
}

/* Cards & Layout */
.card {
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
}

/* Auth Views */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 120px);
  padding: var(--space-md);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-md);
  text-align: left;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 4px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 12px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.8);
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.dark-mode .form-input {
  background: rgba(0, 0, 0, 0.2);
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.2);
}

.text-sm {
  font-size: 0.85rem;
}

.dashboard-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.welcome-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(135deg, rgba(66, 153, 225, 0.1) 0%, rgba(72, 187, 120, 0.1) 100%);
}

.welcome-text h2 {
  font-size: 1.5rem;
}

.welcome-text p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.welcome-stats {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--card-bg);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  min-width: 80px;
}

.stat-item i {
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.stat-item span {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  white-space: nowrap;
}

.stat-item b {
  font-size: 1.1rem;
  color: var(--text-primary);
}

.chart-card {
  text-align: center;
}

.card-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.goal-setting {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.goal-setting select {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  border-radius: 4px;
  padding: 2px 4px;
  cursor: pointer;
}

.dark-mode .goal-setting select {
  background: rgba(0, 0, 0, 0.2);
}

.chart-container {
  position: relative;
  height: 200px;
  margin: 0 auto;
}

.chart-center-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: none;
}

#progress-percentage {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
}

#progress-count {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: -4px;
}

/* Calendar Styles */
.calendar-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
  margin-top: 1rem;
}

.calendar-container {
  flex: 1;
  min-width: 250px;
  max-width: 300px;
}

.calendar-month-name {
  text-align: center;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.calendar-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  border-radius: 4px;
  position: relative;
  background: rgba(255, 255, 255, 0.05);
}

.dark-mode .calendar-day {
  background: rgba(0, 0, 0, 0.2);
}

.calendar-day.empty {
  background: transparent;
}

.calendar-day.today {
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  font-weight: 700;
}

.calendar-day.has-log::after {
  content: '';
  position: absolute;
  bottom: 4px;
  width: 4px;
  height: 4px;
  background: var(--accent-color);
  border-radius: 50%;
  box-shadow: 0 0 5px var(--accent-color);
}

/* Action Buttons Grid */
.actions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.col-span-full {
  grid-column: 1 / -1;
}

.action-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg) var(--space-sm);
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  font-family: inherit;
  gap: 8px;
  width: 100%;
}

.action-card i {
  font-size: 2rem;
  margin-bottom: 8px;
}

.action-card span {
  font-weight: 700;
  font-size: 1.1rem;
}

.action-card small {
  font-size: 0.75rem;
  opacity: 0.8;
}

.action-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  filter: brightness(1.05);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), #2b6cb0);
  color: white;
  padding: var(--space-md);
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 1.2rem;
  font-weight: 700;
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary-color), #2f855a);
  color: white;
}

/* ★PC向けの調整★ */
@media (min-width: 768px) {
  .actions-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .btn-primary,
  .action-card {
    min-height: 120px;
    /* PCでは高さを出して大きく見せる */
    font-size: 1.5rem;
  }
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent-color), #c05621);
  color: white;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  backdrop-filter: blur(4px);
}

.dark-mode .btn-outline {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

/* Course Selection */
.page-title {
  margin-bottom: var(--space-md);
  font-size: 1.5rem;
}

.back-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--space-md);
  font-family: inherit;
}

.back-btn:hover {
  color: var(--primary-color);
}

.course-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.course-card {
  cursor: pointer;
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
  padding-right: 3rem;
}

.course-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--glass-shadow);
  border-color: var(--primary-color);
}

.course-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}

.badge {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  color: white;
}

.badge-green {
  background: var(--secondary-color);
}

.badge-blue {
  background: var(--primary-color);
}

.badge-purple {
  background: #9f7aea;
}

.course-arrow {
  position: absolute;
  right: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 1.2rem;
}

/* Category Selection */
.category-header {
  margin-bottom: var(--space-md);
}

.category-list {
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
  gap: 2px;
}

.category-item {
  display: flex;
  align-items: center;
  padding: 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s;
  user-select: none;
}

.category-item:hover {
  background: rgba(66, 153, 225, 0.1);
}

.category-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-right: 12px;
  cursor: pointer;
}

.category-item span {
  font-weight: 500;
  color: var(--text-primary);
}

.ml-sm {
  margin-left: 8px;
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

/* Quiz UI */
.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-md);
}

.quiz-info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

#quiz-category {
  background: var(--primary-color);
}

.progress-container {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex: 1;
  max-width: 200px;
  justify-content: flex-end;
}

.progress-bar-bg {
  width: 100%;
  height: 8px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.dark-mode .progress-bar-bg {
  background: rgba(255, 255, 255, 0.1);
}

.progress-bar-fill {
  height: 100%;
  background: var(--secondary-color);
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.9rem;
  font-weight: 600;
}

.question-text {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-xl);
  line-height: 1.5;
}

.options-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.option-btn {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border: 2px solid transparent;
  background: rgba(0, 0, 0, 0.03);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  transition: all 0.2s;
}

.dark-mode .option-btn {
  background: rgba(255, 255, 255, 0.05);
}

.option-btn:hover {
  background: rgba(66, 153, 225, 0.1);
  border-color: var(--primary-color);
}

.opt-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: white;
  color: var(--primary-color);
  border-radius: var(--radius-full);
  font-weight: 700;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
}

.dark-mode .opt-label {
  background: var(--card-bg);
  color: var(--text-primary);
}

.option-btn.selected {
  border-color: var(--primary-color);
  background: rgba(66, 153, 225, 0.1);
}

.option-btn.correct {
  border-color: var(--secondary-color);
  background: rgba(72, 187, 120, 0.1);
}

.option-btn.wrong {
  border-color: var(--danger-color);
  background: rgba(245, 101, 101, 0.1);
}

.explanation-box {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  animation: fadeIn 0.5s ease;
}

.dark-mode .explanation-box {
  border-color: rgba(255, 255, 255, 0.1);
}

.explanation-box.hidden {
  display: none;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.result-badge.correct {
  background: rgba(72, 187, 120, 0.2);
  color: var(--secondary-color);
}

.result-badge.wrong {
  background: rgba(245, 101, 101, 0.2);
  color: var(--danger-color);
}

/* Result UI */
.score-circle {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: conic-gradient(var(--secondary-color) 80%, rgba(0, 0, 0, 0.1) 0);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin: 0 auto var(--space-md);
  box-shadow: inset 0 0 0 10px var(--card-bg), 0 4px 15px rgba(0, 0, 0, 0.1);
}

.dark-mode .score-circle {
  box-shadow: inset 0 0 0 10px #1a202c;
}

.score-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.score-total {
  font-size: 1.2rem;
  color: var(--text-secondary);
}

/* Detailed Report View */
#view-report {
  max-width: 800px;
  margin: 0 auto;
}

.report-header-container {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding: 0 var(--space-sm);
}

.report-scroll-area {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.summary-total-card {
  padding: var(--space-lg);
  background: linear-gradient(135deg, rgba(66, 153, 225, 0.15) 0%, rgba(72, 187, 120, 0.1) 100%);
}

.summary-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.summary-stat {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.summary-stat i {
  font-size: 2rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card-bg);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.stat-info .stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-info .stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.grade-report-section {
  margin-bottom: var(--space-xl);
}

.grade-header {
  border-left: 5px solid var(--primary-color);
  padding-left: var(--space-md);
  margin-bottom: var(--space-md);
}

.grade-header h3 {
  font-size: 1.25rem;
}

.grade-main-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

@media (max-width: 600px) {
  .grade-main-stats {
    grid-template-columns: 1fr;
  }
}

.report-chart-box {
  background: var(--card-bg);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  /* min-heightを外して内容に合わせて広がるようにする */
  display: flex;
  flex-direction: column;
}

.report-chart-box h4 {
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
  text-align: center;
  color: var(--text-secondary);
}

.chart-wrapper-rep {
  flex: 1;
  position: relative;
  min-height: 200px;
}

.categories-report-table {
  width: 100%;
  margin-top: var(--space-md);
}

.categories-report-table h4 {
  font-size: 1rem;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.r-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.r-table th,
.r-table td {
  padding: 10px;
  text-align: left;
  border-bottom: 1px solid var(--glass-border);
}

.r-table th {
  color: var(--text-secondary);
  font-weight: 600;
}

.r-table .num-cell {
  text-align: right;
  font-weight: 600;
}

.r-table .pct-cell {
  text-align: right;
  color: var(--secondary-color);
  font-weight: 700;
}

.r-progress-bg {
  width: 100%;
  height: 6px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 3px;
  margin-top: 4px;
}

.r-progress-fill {
  height: 100%;
  background: var(--secondary-color);
  border-radius: 3px;
}

.ai-mentor-box {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  margin-top: var(--space-md);
  text-align: left;
  background: linear-gradient(135deg, rgba(66, 153, 225, 0.1) 0%, rgba(159, 122, 234, 0.1) 100%);
  border-left: 4px solid #9f7aea;
}

.ai-avatar {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.ai-message {
  font-size: 0.95rem;
  line-height: 1.6;
  flex: 1;
}

/* Utility Classes */
.hidden {
  display: none !important;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease forwards;
}

.slide-up {
  animation: slideUp 0.6s ease forwards;
}

.slide-up-delayed {
  animation: slideUp 0.6s ease forwards;
  animation-delay: 0.2s;
  opacity: 0;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  :root {
    --space-lg: 16px;
    --space-xl: 24px;
    --radius-lg: 16px;
  }

  .app-header {
    padding: var(--space-sm) var(--space-md);
  }

  .logo {
    font-size: 1.2rem;
  }

  .welcome-card {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
    padding: var(--space-md);
  }

  .welcome-text h2 {
    font-size: 1.25rem;
  }

  .actions-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    justify-items: center;
    width: 100%;
  }

  .action-card {
    padding: var(--space-md);
    flex-direction: row;
    justify-content: center;
    gap: var(--space-md);
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
    grid-column: span 1 !important;
  }

  .action-card i {
    font-size: 1.5rem;
    margin-bottom: 0;
  }

  .action-card span {
    font-size: 1rem;
  }

  .calendar-wrapper {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  .chart-container {
    height: 180px;
  }

  .score-circle {
    width: 120px;
    height: 120px;
  }

  .score-number {
    font-size: 2.2rem;
  }

  /* Glossary mobile adjustments */
  .glossary-header-container {
    flex-direction: column;
    align-items: stretch;
  }

  .index-btn {
    padding: 6px;
    font-size: 0.75rem;
  }
}

/* === Glossary View === */
.glossary-header-container {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding: 0 var(--space-md);
}

.glossary-search-wrapper {
  margin-bottom: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: 0 var(--space-md);
}

.search-box {
  display: flex;
  align-items: center;
  background: white;
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-lg);
  gap: var(--space-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.dark-mode .search-box {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
}

.search-box i {
  color: var(--text-secondary);
}

.search-box input {
  border: none;
  background: transparent;
  width: 100%;
  font-size: 1rem;
  color: var(--text-primary);
  outline: none;
}

.grade-filter-chips {
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
}

.grade-filter-chips::-webkit-scrollbar {
  display: none;
}

.grade-filter-chips .chip {
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.1);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  color: var(--text-primary);
}

.dark-mode .grade-filter-chips .chip {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
}

.grade-filter-chips .chip.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(66, 153, 225, 0.3);
}

.kana-index-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: center;
  background: rgba(255, 255, 255, 0.5);
  padding: 8px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.dark-mode .kana-index-bar {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.1);
}

.index-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
}

.index-btn:hover {
  background: rgba(66, 153, 225, 0.1);
  color: var(--primary-color);
}

.index-btn.active {
  background: var(--primary-color);
  color: white;
}

.glossary-scroll-area {
  flex: 1;
  overflow-y: auto;
  padding: 0 var(--space-md) 100px;
}

.glossary-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.glossary-card {
  padding: var(--space-md);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.glossary-card .term-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  width: 100%;
  background: none;
  border: none;
  padding: 0;
  text-align: left;
  cursor: pointer;
}

.term-title-box {
  display: flex;
  flex-direction: column;
}

.term-reading {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.term-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.term-badges {
  display: flex;
  gap: 6px;
  align-items: center;
}

.importance-badge {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
}

.imp-a {
  background: #fed7d7;
  color: #c53030;
}

.imp-b {
  background: #fef3c7;
  color: #92400e;
}

.imp-c {
  background: #edf2f7;
  color: #4a5568;
}

.term-details {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  display: none;
  /* 初期は非表示 */
}

.glossary-card.expanded .term-details {
  display: block;
}

.dark-mode .term-details {
  border-top-color: rgba(255, 255, 255, 0.1);
}

.related-quiz-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  color: var(--primary-color);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  padding: 4px 8px;
  background: rgba(66, 153, 225, 0.1);
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.related-quiz-link:hover {
  background: var(--primary-color);
  color: white;
}

/* Legal & Information Pages */
.legal-container {
  max-width: 700px;
  margin: 0 auto;
  padding: var(--space-md);
}

.legal-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.legal-content {
  padding: var(--space-xl);
  max-height: 70vh;
  overflow-y: auto;
  text-align: left;
}

.last-updated {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  padding-bottom: var(--space-sm);
}

.legal-section {
  margin-bottom: var(--space-xl);
}

.legal-section h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
  color: var(--primary-color);
}

.legal-section p {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.8;
}

.legal-section ul {
  padding-left: 1.2rem;
  margin-top: var(--space-sm);
}

.legal-section li {
  font-size: 0.95rem;
  margin-bottom: 6px;
}

/* Achievement Circle (Report View) */
.achievement-circle-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px 0;
  height: 200px;
}

.achievement-circle {
  position: relative;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: conic-gradient(var(--primary-color) 0%, rgba(66, 153, 225, 0.1) 0%);
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05);
  transition: background 1s ease-out;
}

.achievement-circle::before {
  content: "";
  position: absolute;
  width: 120px;
  height: 120px;
  background-color: white;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.dark-mode .achievement-circle::before {
  background-color: var(--surface-color);
}

.achievement-text {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 10;
}

.achievement-percent {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.achievement-fraction {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Contact Page */
.contact-card {
  padding: var(--space-xl);
  text-align: left;
}

.contact-info {
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  padding-bottom: var(--space-md);
}

.contact-info p:first-child {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-color);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: var(--space-md);
}

.checkbox-group input {
  width: 16px;
  height: 16px;
}

.alert {
  display: flex;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-sm);
  align-items: flex-start;
}

.alert-info {
  background: rgba(66, 153, 225, 0.1);
  color: var(--primary-color);
}

.alert i {
  margin-top: 3px;
}

/* Footer Links for Auth Screens */
.auth-footer-links {
  margin-top: var(--space-xl);
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  font-size: 0.75rem;
}

.auth-footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.auth-footer-links a:hover {
  color: var(--primary-color);
}

/* Ranking List */
.ranking-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.ranking-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: white;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.02);
  transition: transform 0.2s;
}

.ranking-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.dark-mode .ranking-item {
  background: rgba(255, 255, 255, 0.05);
}

.rank-position {
  font-size: 1.5rem;
  font-weight: 800;
  width: 50px;
  text-align: center;
  color: var(--text-secondary);
}

.rank-1 {
  color: #ecc94b;
  font-size: 1.8rem;
}

.rank-2 {
  color: #a0aec0;
  font-size: 1.6rem;
}

.rank-3 {
  color: #ed8936;
  font-size: 1.6rem;
}

.rank-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.rank-name {
  font-weight: 700;
  font-size: 1.1rem;
}

.rank-stats {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  gap: 12px;
}

.rank-score {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-color);
  background: rgba(66, 153, 225, 0.1);
  padding: 4px 12px;
  border-radius: 20px;
}

.auth-footer-links .divider {
  color: rgba(0, 0, 0, 0.1);
}

.dark-mode .auth-footer-links .divider {
  color: rgba(255, 255, 255, 0.1);
}

.dark-mode .last-updated,
.dark-mode .contact-info,
.dark-mode .legal-content {
  border-color: rgba(255, 255, 255, 0.1);
}

/* Home View Footer */
.view-footer {
  margin-top: var(--space-xl);
  padding: var(--space-lg) 0;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  text-align: center;
  width: 100%;
}

.dark-mode .view-footer {
  border-top-color: rgba(255, 255, 255, 0.05);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--primary-color);
}

/* =========================================
   LP(Welcome) & News UI 
========================================= */

/* Welcome (LP) View */
.welcome-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 150px);
  padding: var(--space-md);
}

.hero-section {
  max-width: 600px;
  width: 100%;
}

.hero-icon {
  font-size: 4rem;
  color: var(--primary-color);
  margin-bottom: var(--space-md);
}

.hero-title {
  font-size: 2rem;
  line-height: 1.3;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.hero-image-container {
  width: 100%;
  max-width: 450px;
  /* PCでは最大450pxに制限 */
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
  border: 4px solid rgba(255, 255, 255, 0.5);
}

.hero-image {
  width: 100%;
  height: auto;
  /* アスペクト比を維持 */
  display: block;
  object-fit: contain;
  /* 横が見切れないように調整 */
}

.dark-mode .hero-image-container {
  border-color: rgba(0, 0, 0, 0.3);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.feature-card {
  padding: var(--space-lg) var(--space-sm);
  text-align: center;
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

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

.feature-card h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
}

.welcome-actions {
  margin-top: var(--space-xl);
}

/* News Section */
.news-list {
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  border-left: 5px solid var(--accent-color);
}

.news-header {
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: 8px;
}

.news-item {
  padding: 12px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.dark-mode .news-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.news-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.news-date {
  font-size: 0.8rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 4px;
}

.news-title {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.news-content {
  line-height: 1.5;
  margin-top: 6px;
  padding: 8px;
  background: rgba(0, 0, 0, 0.02);
  border-radius: var(--radius-sm);
}

.dark-mode .news-content {
  background: rgba(255, 255, 255, 0.05);
}