/* ========================================
   心绪 · 情绪卡片 — Design System
   ======================================== */

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

/* --- CSS Custom Properties --- */
:root {
  --color-bg: #0d0d0d;
  --color-surface: #1a1a1a;
  --color-surface-hover: #242424;
  --color-text: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.6);
  --color-text-muted: rgba(255, 255, 255, 0.35);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-accent: #FFD93D;

  --font-main: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 20px;
  --font-size-xl: 28px;
  --font-size-2xl: 36px;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 50%;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  --z-base: 1;
  --z-overlay: 10;
  --z-toast: 100;

  /* 卡片尺寸（预览时按比例缩放） */
  --card-size: 320px;

  touch-action: manipulation;
}

/* --- Base --- */
html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  min-height: 100dvh;
  min-height: -webkit-fill-available;
  overflow-x: hidden;
  line-height: 1.5;
}

/* --- Typography --- */
h1, h2, h3 {
  font-weight: 700;
  line-height: 1.2;
}

/* --- Layout --- */
.container {
  max-width: 480px;
  margin: 0 auto;
  padding: var(--spacing-lg);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* --- Views --- */
.view {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-base);
  background-color: var(--color-bg);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

/* ========================================
   View 1: 情绪选择
   ======================================== */
.app-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.app-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}

.app-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* --- Emotion Grid --- */
.emotion-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  width: 100%;
  max-width: 360px;
}

.emotion-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) var(--spacing-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  font-family: var(--font-main);
  font-size: var(--font-size-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  min-height: 96px;
}

.emotion-btn:active {
  transform: scale(0.96);
  background-color: var(--color-surface-hover);
}

.emotion-icon {
  font-size: 32px;
  line-height: 1;
}

.emotion-label {
  font-weight: 600;
  font-size: var(--font-size-md);
}

/* 选中的情绪高亮 — 通过 JS 动态设置 border-color */
.emotion-btn.selected {
  border-width: 2px;
}

/* --- Footer --- */
.footer-note {
  margin-top: var(--spacing-2xl);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ========================================
   View 2: 加载中
   ======================================== */
.loading-container {
  gap: var(--spacing-lg);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ========================================
   View 3: 卡片预览
   ======================================== */
.card-container {
  justify-content: flex-start;
  padding-top: var(--spacing-xl);
  gap: var(--spacing-lg);
}

/* 卡片显示区域 */
#cardPreview {
  width: var(--card-size);
  height: var(--card-size);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  flex-shrink: 0;
  /* 卡片内部的 DOM 由 card.js 渲染 */
}

/* --- 操作按钮 --- */
.card-actions {
  width: 100%;
  max-width: var(--card-size);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.action-row-primary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  white-space: nowrap;
}

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

.action-btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.action-btn-secondary:active {
  background-color: var(--color-surface-hover);
}

.action-btn-primary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.action-btn-primary:active {
  background-color: var(--color-surface-hover);
}

.action-btn-highlight {
  background-color: var(--color-accent);
  color: #0d0d0d;
}

.action-btn-highlight:active {
  filter: brightness(0.9);
}

.btn-icon {
  font-size: 18px;
  line-height: 1;
}

.retry-badge {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 400;
}

/* 3 次用完禁用样式 */
.action-btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.action-btn-secondary:disabled:active {
  transform: none;
}

.card-footer-note {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-align: center;
}

/* ========================================
   Toast
   ======================================== */
.toast {
  position: fixed;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-surface);
  color: var(--color-text);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  z-index: var(--z-toast);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  white-space: nowrap;
}

.toast.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(12px);
  pointer-events: none;
}

/* ========================================
   响应式 — 手机竖屏（主场景）
   ======================================== */
@media (max-width: 480px) {
  :root {
    --card-size: min(85vw, 360px);
    --font-size-xl: 24px;
  }

  .emotion-grid {
    gap: var(--spacing-sm);
  }

  .emotion-btn {
    padding: var(--spacing-md);
    min-height: 80px;
  }

  .emotion-icon {
    font-size: 28px;
  }

  .container {
    padding: var(--spacing-md);
  }

  .app-header {
    margin-bottom: var(--spacing-xl);
  }
}

/* --- 桌面端 --- */
@media (min-width: 769px) {
  body {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .emotion-btn:hover {
    background-color: var(--color-surface-hover);
    transform: translateY(-2px);
  }

  .action-btn:hover {
    filter: brightness(1.1);
  }
}

/* ========================================
   卡片内部样式（由 card.js 动态注入）
   这些类用在 html2canvas 截取的 DOM 中
   ======================================== */
.xinxu-card {
  width: 1080px;
  height: 1080px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px;
  position: relative;
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #ffffff;
  overflow: hidden;
}

/* 装饰层：超大半透明 emoji 作为背景纹理 */
.xinxu-card-deco {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  font-size: 400px;
  line-height: 1;
  opacity: 0.12;
  pointer-events: none;
  filter: blur(2px);
}

/* 内容层 */
.xinxu-card-body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.xinxu-card-emoji {
  font-size: 100px;
  line-height: 1;
  margin-bottom: 8px;
}

.xinxu-card-emotion {
  font-size: 88px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.xinxu-card-divider {
  width: 60px;
  height: 3px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 2px;
  margin: 12px 0;
}

.xinxu-card-copy {
  font-size: 32px;
  font-weight: 400;
  text-align: center;
  max-width: 75%;
  line-height: 1.5;
  letter-spacing: 0.02em;
}

/* 底部信息 */
.xinxu-card-footer {
  position: absolute;
  bottom: 48px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 64px;
  z-index: 1;
}

.xinxu-card-date {
  font-size: 24px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.04em;
}

.xinxu-card-watermark {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.02em;
}