/* ================================================================
   pages.css — 5个页面布局骨架
   ================================================================ */

/* === 概览页 === */
.overview-hero {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr auto;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  align-items: stretch;
}

.hero-level-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--md-primary-container);
  border-radius: var(--radius-lg);
  min-width: 100px;
}

.hero-level-value {
  font-size: var(--text-headline-medium);
  font-weight: 700;
  color: var(--md-on-primary-container);
}

.hero-level-title {
  font-size: var(--text-label-large);
  color: var(--md-on-primary-container);
  opacity: 0.8;
}

.hero-level-jp {
  font-size: var(--text-label-small);
  color: var(--md-on-primary-container);
  opacity: 0.6;
  font-style: italic;
}

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

.progress-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
}

.progress-label {
  font-size: var(--text-label-large);
  font-weight: 500;
  color: var(--md-on-surface);
}

.progress-value {
  font-size: var(--text-label-medium);
  color: var(--md-on-surface-variant);
}

/* === 学科卡片网格 === */
.subject-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.subject-card {
  background: var(--md-surface-container-low);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  cursor: pointer;
  transition: all 0.2s var(--ease-standard);
  position: relative;
  overflow: hidden;
}

.subject-card:hover {
  box-shadow: var(--elevation-2);
  transform: translateY(-2px);
  border-color: var(--md-primary);
}

.subject-card:active {
  transform: scale(0.98);
}

.subject-card-icon {
  font-size: 36px;
  margin-bottom: var(--space-sm);
}

.subject-card-name {
  font-size: var(--text-title-medium);
  font-weight: 600;
  color: var(--md-on-surface);
  margin-bottom: 2px;
}

.subject-card-level {
  font-size: var(--text-label-medium);
  color: var(--md-on-surface-variant);
  margin-bottom: var(--space-sm);
}

.subject-card-progress {
  margin-bottom: var(--space-sm);
}

.subject-card-meta {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-label-small);
  color: var(--md-on-surface-variant);
}

/* === 折叠面板 === */
.fold-section {
  margin-top: var(--space-lg);
}

.fold-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  background: var(--md-surface-container-low);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 500;
  font-size: var(--text-label-large);
  color: var(--md-on-surface);
  transition: background 0.15s var(--ease-standard);
}

.fold-header:hover {
  background: var(--md-surface-container);
}

.fold-arrow {
  font-size: 12px;
  transition: transform 0.3s var(--ease-standard);
}

.fold-arrow.open {
  transform: rotate(180deg);
}

.fold-body {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.35s var(--ease-standard);
}

.fold-body.open {
  max-height: 5000px;
}

/* === 技能树页 === */
.skill-tree-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  font-size: var(--text-label-small);
  color: var(--md-on-surface-variant);
}

.legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  margin-right: 4px;
  vertical-align: middle;
}

.skill-tree-container {
  width: 100%;
  height: 450px;
}

.node-detail-panel {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: var(--md-surface-container-low);
  border-radius: var(--radius-md);
  border: 1px solid var(--md-outline-variant);
  display: none;
}

.node-detail-panel.visible {
  display: block;
  animation: fadeInUp 0.3s var(--ease-standard);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.node-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-md);
}

.node-detail-title {
  font-size: var(--text-title-medium);
  font-weight: 600;
  color: var(--md-on-surface);
}

.node-detail-subtitle {
  font-size: var(--text-label-small);
  color: var(--md-on-surface-variant);
}

.node-detail-temp {
  font-size: var(--text-headline-small);
  font-weight: 700;
}

.node-detail-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

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

.node-stat-value {
  font-size: var(--text-title-medium);
  font-weight: 600;
  color: var(--md-on-surface);
}

.node-stat-label {
  font-size: var(--text-label-small);
  color: var(--md-on-surface-variant);
}

/* === 复习中心页 === */
.review-section-toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  background: var(--md-surface-container-low);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.review-toggle-icon {
  font-size: 12px;
  transition: transform 0.3s var(--ease-standard);
}

.review-curve-section.expanded .review-toggle-icon {
  transform: rotate(180deg);
}

.review-curve-body {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.35s var(--ease-standard);
}

.review-curve-section.expanded .review-curve-body {
  max-height: 500px;
}

.shadow-queue-section {
  margin-top: var(--space-lg);
}

.shadow-item {
  padding: var(--space-md);
  background: var(--md-surface-container-low);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  transition: all 0.15s var(--ease-standard);
}

.shadow-item:hover {
  box-shadow: var(--elevation-1);
}

.shadow-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
}

.shadow-item-name {
  font-weight: 600;
  font-size: var(--text-body-medium);
}

.shadow-item-urgency {
  font-size: var(--text-label-small);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  font-weight: 600;
}

.shadow-item-meta {
  font-size: var(--text-label-small);
  color: var(--md-on-surface-variant);
}

/* === 日志页 === */
.log-controls {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.log-controls .select,
.log-controls .input {
  flex: 1;
  min-width: 120px;
}

.log-item {
  padding: var(--space-md);
  background: var(--md-surface-container-low);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  transition: all 0.15s var(--ease-standard);
}

.log-item:hover {
  box-shadow: var(--elevation-1);
}

.log-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
}

.log-item-subject {
  font-weight: 600;
  font-size: var(--text-body-medium);
}

.log-item-xp {
  font-size: var(--text-title-small);
  font-weight: 700;
  color: var(--color-success);
}

.log-item-detail {
  font-size: var(--text-label-small);
  color: var(--md-on-surface-variant);
}

.log-item-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

/* === 更多页 === */
.settings-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.settings-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  background: var(--md-surface-container-low);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s var(--ease-standard);
}

.settings-item:hover {
  background: var(--md-surface-container);
  box-shadow: var(--elevation-1);
}

.settings-item:active {
  transform: scale(0.98);
}

.settings-item-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.settings-item-icon {
  font-size: 20px;
}

.settings-item-name {
  font-size: var(--text-body-medium);
  font-weight: 500;
  color: var(--md-on-surface);
}

.settings-item-desc {
  font-size: var(--text-label-small);
  color: var(--md-on-surface-variant);
}

.settings-item-arrow {
  font-size: 16px;
  color: var(--md-on-surface-variant);
}

/* === 响应式 === */
@media (max-width: 768px) {
  .overview-hero {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
  }
  .hero-level-card {
    grid-column: 1 / -1;
  }
  .subject-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .skill-tree-container {
    height: 350px;
  }
  .node-detail-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .overview-hero {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xs);
  }
  .subject-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
  }
  .subject-card {
    padding: var(--space-md);
  }
  .subject-card-icon {
    font-size: 28px;
  }
  .skill-tree-container {
    height: 300px;
  }
  .log-controls {
    flex-direction: column;
  }
}

@media (max-width: 360px) {
  .subject-grid {
    grid-template-columns: 1fr;
  }
}