/* --- 主题颜色变量定义 --- */
:root {
  /* 浅色主题 (默认) */
  --color-bg-start: #f8fafc;
  --color-bg-end: #f1f5f9;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94a3b8;
  --color-primary: #14b8a6;
  --color-primary-hover: #0d9488;
  --color-secondary: #0d9488;
  --color-secondary-hover: #0f766e;
  --color-white: #ffffff;
  --color-red-500: #ef4444;
  --color-orange-500: #f97316;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* 深色主题 */
    --color-bg-start: #0f172a;
    --color-bg-end: #0f172a;
    --color-surface: #1e293b;
    --color-border: #334155;
    --color-text-primary: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-text-tertiary: #64748b;
    --color-red-500: #fca5a5;
  }
}

/* --- 全局样式 --- */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-image: linear-gradient(to bottom right, var(--color-bg-start), var(--color-bg-end));
  background-color: var(--color-bg-start);
  color: var(--color-text-primary);
  min-height: 100vh;
  padding: 1rem;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* --- 布局与标题 --- */
.container { width: 100%; max-width: 80rem; margin: auto; padding: 2rem 1rem; }
.header { text-align: center; margin-bottom: 2rem; }
.title { font-size: 2.25rem; font-weight: 700; color: var(--color-text-primary); }
.subtitle { color: var(--color-text-secondary); margin-top: 0.5rem; max-width: 600px; margin-left: auto; margin-right: auto;}

/* --- 表单 --- */
.parse-form { display: flex; flex-direction: column; gap: 1rem; max-width: 42rem; margin: auto; }
.url-input {
  width: 100%;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  color: var(--color-text-primary);
  transition: all 0.2s ease-in-out;
  font-family: inherit;
  font-size: 1rem;
  resize: vertical;
  box-shadow: 0 1px 2px 0 rgba(0,0,0,0.05);
}
.url-input:focus {
  outline: 2px solid transparent;
  box-shadow: 0 0 0 2px var(--color-primary);
  border-color: var(--color-primary);
}
.form-actions { display: flex; justify-content: space-between; align-items: center; }
.progress-text { font-size: 0.875rem; color: var(--color-text-secondary); }
.submit-button {
  background-color: var(--color-primary);
  color: var(--color-white); font-weight: 700;
  padding: 0.625rem 1.5rem; border: none;
  border-radius: 0.375rem; cursor: pointer;
  transition: all 0.2s ease-in-out;
}
.submit-button:hover { background-color: var(--color-primary-hover); }
.submit-button:disabled { background-color: var(--color-primary); opacity: 0.5; cursor: not-allowed; }

/* --- 全局操作 --- */
.global-actions { margin: 2rem 0; text-align: center; }

/* --- 结果列表 --- */
#batch-results-container {
    display: grid;
    gap: 1.5rem;
    margin-top: 2rem;
    grid-template-columns: 1fr;
    /* align-items: start; 已被移除，恢复为默认的 stretch */
}

@media (min-width: 768px) {
    #batch-results-container.count-1 { max-width: 26rem; margin-left: auto; margin-right: auto; }
    #batch-results-container.count-2 { grid-template-columns: repeat(2, 1fr); }
    #batch-results-container.count-n { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1280px) {
    #batch-results-container.count-n { grid-template-columns: repeat(3, 1fr); }
}

/* --- 卡片布局 --- */
.result-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 1.25rem;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.07), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.5s ease, transform 0.5s ease;
  display: flex;
  flex-direction: column;
}

.result-card.show { opacity: 1; transform: scale(1); }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    display: inline-block;
}
.status-badge.success { background-color: rgba(16, 185, 129, 0.1); color: #059669; }
.status-badge.error { background-color: rgba(239, 68, 68, 0.1); color: var(--color-red-500); }
.status-badge.processing { background-color: rgba(249, 115, 22, 0.1); color: var(--color-orange-500); }

.retry-button {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 0.375rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    transition: all 0.2s;
}
.retry-button:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}
.retry-button svg {
    width: 0.875rem;
    height: 0.875rem;
}

/* --- 卡片主要内容区 --- */
.card-main-content {
    flex-grow: 1; /* 让这个区域占据所有可用空间，将下载按钮推到底部 */
    display: flex;
    flex-direction: column;
}

.video-info { text-align: left; }
.video-desc { font-size: 1rem; font-weight: 600; color: var(--color-text-primary); margin: 0 0 0.75rem 0; word-break: break-word; }
.author-details { margin-bottom: 0.75rem; }
.author-line { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap;}
.video-author { font-size: 0.875rem; color: var(--color-text-secondary); }
.video-create-time { font-size: 0.75rem; color: var(--color-text-tertiary); }
.author-signature { font-size: 0.875rem; color: var(--color-text-tertiary); margin: 0.25rem 0 0 0; white-space: pre-wrap; word-break: break-all; }
.video-stats {
  display: flex; flex-wrap: wrap;
  gap: 1rem; font-size: 0.875rem;
  color: var(--color-text-secondary); padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
  margin-top: auto; /* 将统计数据推到底部 */
}
.stat-item { display: flex; align-items: center; gap: 0.25rem; }

.media-container { 
    position: relative; 
    width: 100%; 
    border-radius: 0.5rem; 
    background-color: #000; 
    overflow: hidden;
    aspect-ratio: 9 / 16;
    margin-top: 1rem;
}
.media-player, .image-carousel { 
    width: 100%;
    height: 100%;
    display: block; 
}
.media-player { object-fit: contain; }
.image-carousel { aspect-ratio: auto; }
.carousel-inner { display: flex; height: 100%; transition: transform 0.4s ease-in-out; }
.carousel-item { min-width: 100%; height: 100%; }
.carousel-item img { width: 100%; height: 100%; object-fit: contain; }
.carousel-btn {
    position: absolute; top: 50%; transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.4); color: white; border: none;
    padding: 0.5rem; cursor: pointer; border-radius: 50%;
    width: 2.5rem; height: 2.5rem; font-size: 1.5rem; line-height: 1;
    display: flex; align-items: center; justify-content: center;
    transition: background-color 0.2s; -webkit-tap-highlight-color: transparent;
}
.carousel-btn:hover { background-color: rgba(0, 0, 0, 0.7); }
.carousel-btn.prev { left: 0.5rem; }
.carousel-btn.next { right: 0.5rem; }
.carousel-indicator {
    position: absolute; bottom: 0.5rem; left: 50%; transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.5); color: white;
    padding: 0.25rem 0.75rem; border-radius: 1rem; font-size: 0.75rem;
}

.download-actions { display: flex; gap: 0.75rem; margin-top: 1rem; flex-shrink: 0; }
.download-button {
  flex-grow: 1; width: auto; display: flex;
  align-items: center; justify-content: center;
  background-color: var(--color-primary); color: var(--color-white);
  font-weight: 700; padding: 0.75rem 1rem; border-radius: 0.5rem;
  transition: background-color 0.2s ease-in-out; text-decoration: none;
  border: none; font-family: inherit; font-size: 1rem; cursor: pointer;
}
.download-button:hover { background-color: var(--color-primary-hover); }
.icon-download { height: 1.25rem; width: 1.25rem; margin-right: 0.5rem; }
.download-all { background-color: var(--color-secondary); }
.download-all:hover { background-color: var(--color-secondary-hover); }
.download-all:disabled { background-color: var(--color-secondary); opacity: 0.5; cursor: not-allowed; }