/* ============================================
   运动受伤问答助手 — 共享样式表
   暗色主题 · 动漫卡通 · 移动端优先
   ============================================ */

/* ---- CSS 自定义属性（主题色） ---- */
:root {
  --color-bg-start: #0f0c29;
  --color-bg-mid: #302b63;
  --color-bg-end: #24243e;
  --color-primary: #6c63ff;
  --color-primary-light: #8b83ff;
  --color-secondary: #ff6584;
  --color-accent: #00d2ff;
  --color-success: #4ade80;
  --color-warning: #facc15;
  --color-danger: #ef4444;
  --color-card-bg: rgba(255, 255, 255, 0.07);
  --color-card-border: rgba(255, 255, 255, 0.12);
  --color-text: #e8e8f0;
  --color-text-dim: #a0a0b8;
  --color-text-bright: #ffffff;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s ease;
}

/* ---- 全局重置 ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: linear-gradient(135deg, var(--color-bg-start), var(--color-bg-mid), var(--color-bg-end));
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
  padding: 0 16px 40px;
  overflow-x: hidden;
}

/* ---- 渐变标题 ---- */
.gradient-title {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-align: center;
  margin: 24px 0 8px;
  letter-spacing: 1px;
}

.gradient-sub {
  font-size: 1rem;
  color: var(--color-text-dim);
  text-align: center;
  margin-bottom: 24px;
}

/* ---- 导航栏 ---- */
.top-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  max-width: 800px;
  margin: 0 auto;
}

.top-nav a {
  color: var(--color-text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition-fast);
}

.top-nav a:hover {
  color: var(--color-primary-light);
}

.top-nav .nav-title {
  margin-left: auto;
  font-size: 0.85rem;
  color: var(--color-text-dim);
  opacity: 0.6;
}

/* ---- 卡片容器 ---- */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
}

@media (min-width: 600px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---- 卡片 ---- */
.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 40px rgba(108, 99, 255, 0.25);
}

.card:active {
  transform: translateY(-1px) scale(0.98);
}

.card .card-icon {
  font-size: 2.4rem;
  margin-bottom: 12px;
  display: block;
}

.card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 6px;
}

.card p {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  line-height: 1.5;
}

/* 卡片装饰光晕 */
.card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(108, 99, 255, 0.08), transparent 70%);
  pointer-events: none;
  transition: opacity var(--transition-normal);
  opacity: 0;
}

.card:hover::after {
  opacity: 1;
}

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
  font-family: inherit;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
}

.btn-danger {
  background: linear-gradient(135deg, var(--color-danger), #f87171);
  color: #fff;
}

.btn-success {
  background: linear-gradient(135deg, var(--color-success), #22c55e);
  color: #1a1a2e;
}

.btn-warning {
  background: linear-gradient(135deg, var(--color-warning), #fbbf24);
  color: #1a1a2e;
}

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

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

.btn-block {
  width: 100%;
}

/* ---- 场景容器 ---- */
.scene-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 0;
}

/* ---- 场景头部（角色+描述） ---- */
.scene-header {
  text-align: center;
  margin-bottom: 24px;
}

.scene-emoji {
  font-size: 4rem;
  display: block;
  margin-bottom: 12px;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.scene-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 8px;
}

.scene-desc {
  font-size: 1rem;
  color: var(--color-text-dim);
  max-width: 500px;
  margin: 0 auto;
}

/* ---- 选项按钮组 ---- */
.options-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 20px 0;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--color-card-bg);
  border: 2px solid var(--color-card-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
  font-family: inherit;
  line-height: 1.4;
}

.option-btn:hover {
  border-color: var(--color-primary);
  background: rgba(108, 99, 255, 0.1);
  transform: translateX(4px);
}

.option-btn .opt-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.option-btn.correct {
  border-color: var(--color-success);
  background: rgba(74, 222, 128, 0.15);
}

.option-btn.wrong {
  border-color: var(--color-danger);
  background: rgba(239, 68, 68, 0.15);
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  50% { transform: translateX(8px); }
  75% { transform: translateX(-4px); }
}

/* ---- 反馈区域 ---- */
.feedback-area {
  margin: 20px 0;
  min-height: 80px;
}

/* 知识卡片（选错后弹出） */
.knowledge-card {
  background: linear-gradient(135deg, rgba(255, 101, 132, 0.15), rgba(239, 68, 68, 0.1));
  border: 1px solid rgba(255, 101, 132, 0.3);
  border-radius: var(--radius-md);
  padding: 20px;
  animation: cardPopIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  margin-bottom: 16px;
}

.knowledge-card.success {
  background: linear-gradient(135deg, rgba(74, 222, 128, 0.15), rgba(34, 197, 94, 0.1));
  border-color: rgba(74, 222, 128, 0.3);
}

@keyframes cardPopIn {
  0% { transform: scale(0.8) translateY(20px); opacity: 0; }
  100% { transform: scale(1) translateY(0); opacity: 1; }
}

.knowledge-card .kc-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.knowledge-card .kc-title .kc-icon {
  font-size: 1.3rem;
}

.knowledge-card .kc-body {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text);
}

.knowledge-card .kc-body ul {
  margin: 8px 0 0 20px;
}

.knowledge-card .kc-body li {
  margin-bottom: 4px;
}

/* ---- 伤口恶化动画（Canvas） ---- */
.animation-box {
  width: 100%;
  max-width: 400px;
  height: 200px;
  margin: 16px auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.2);
  position: relative;
}

.animation-box canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ---- 抽筋抖动动画 ---- */
.cramp-animation {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 20px;
  margin: 16px 0;
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-md);
}

.cramp-leg {
  font-size: 4rem;
  display: inline-block;
  animation: crampShake 0.3s ease infinite alternate;
}

@keyframes crampShake {
  0% { transform: rotate(-5deg) scale(1); }
  100% { transform: rotate(5deg) scale(1.05); }
}

.cramp-leg.stopped {
  animation: none;
  transform: rotate(0);
}

.cramp-arrow {
  font-size: 2rem;
  color: var(--color-accent);
  animation: arrowPulse 1s ease infinite;
}

@keyframes arrowPulse {
  0%, 100% { opacity: 0.4; transform: translateX(0); }
  50% { opacity: 1; transform: translateX(8px); }
}

/* ---- 伤情报告表 ---- */
.report-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 16px 0;
}

.report-card h3 {
  color: var(--color-text-bright);
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.report-field {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.report-field:last-child {
  border-bottom: none;
}

.report-field .field-label {
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

.report-field .field-value {
  color: var(--color-text-bright);
  font-weight: 600;
  font-size: 0.95rem;
  text-align: right;
  max-width: 60%;
}

/* ---- 严重程度指示器 ---- */
.severity-bar {
  display: flex;
  gap: 6px;
  margin: 8px 0;
}

.severity-bar .bar-seg {
  flex: 1;
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
  transition: background var(--transition-normal);
}

.severity-bar .bar-seg.active {
  background: var(--color-danger);
}

.severity-bar .bar-seg.active.mild {
  background: var(--color-warning);
}

.severity-bar .bar-seg.active.moderate {
  background: #f97316;
}

/* ---- 按钮组 ---- */
.btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 20px 0;
}

/* ---- 进度条 ---- */
.progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  margin: 16px 0;
  overflow: hidden;
}

.progress-bar .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 3px;
  transition: width var(--transition-normal);
}

/* ---- 状态标签 ---- */
.status-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.status-tag.danger {
  background: rgba(239, 68, 68, 0.2);
  color: var(--color-danger);
}

.status-tag.success {
  background: rgba(74, 222, 128, 0.2);
  color: var(--color-success);
}

.status-tag.warning {
  background: rgba(250, 204, 21, 0.2);
  color: var(--color-warning);
}

/* ---- 底部操作栏 ---- */
.action-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ---- 隐藏辅助 ---- */
.hidden {
  display: none !important;
}

/* ---- 响应式微调 ---- */
@media (max-width: 480px) {
  body {
    padding: 0 12px 32px;
  }
  .gradient-title {
    font-size: 1.5rem;
  }
  .card {
    padding: 18px 16px;
  }
  .scene-emoji {
    font-size: 3rem;
  }
  .option-btn {
    padding: 14px 16px;
    font-size: 0.95rem;
  }
  .btn-group {
    flex-direction: column;
  }
  .btn-group .btn {
    width: 100%;
  }
}

/* ---- 轮次指示器（圆点） ---- */
.round-dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-dim);
  font-weight: 700;
  font-size: 0.9rem;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
}

.round-dot.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary-light);
  transform: scale(1.15);
  box-shadow: 0 0 16px rgba(108, 99, 255, 0.4);
}

.round-dot.done {
  background: var(--color-success);
  color: #1a1a2e;
}

/* ---- 血滴下落容器 ---- */
#bloodDripBox,
#iceBox {
  animation: fadeSlideIn 0.4s ease;
}

@keyframes fadeSlideIn {
  0% { opacity: 0; transform: translateY(10px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* ---- 下一题按钮脉冲 ---- */
#nextBtn {
  animation: pulseGlow 1.5s ease infinite;
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 8px rgba(108, 99, 255, 0.3); }
  50% { box-shadow: 0 0 20px rgba(108, 99, 255, 0.6); }
}

/* ---- 角色表情容器 ---- */
#moodCanvas {
  transition: transform var(--transition-normal);
}

#moodCanvas:hover {
  transform: scale(1.05);
}