/* ===== 设计变量 ===== */
:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --text: #1f2937;
  --muted: #9ca3af;
  --bg: #f6f7f9;
  --surface: #fff;
  --border: #e5e7eb;
  --danger: #dc2626;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 键盘可操作：清晰的焦点环（仅键盘导航时显示） */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: #fff;
  padding: 8px 16px;
  z-index: 1000;
}
.skip-link:focus { left: 0; }

/* ===== 顶栏 ===== */
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); }
.topbar-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.brand { font-weight: 800; font-size: 18px; color: #111827; }
.tagline { color: var(--muted); font-size: 13px; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 14px; font-size: 14px; }
.credits { color: #6b7280; }
.credits b { color: var(--danger); }

/* ===== 容器 ===== */
.container { max-width: 860px; margin: 0 auto; padding: 24px 16px; }
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 20px;
}
.panel.narrow { max-width: 420px; margin: 40px auto; }
h2 { margin: 0 0 14px; font-size: 18px; }
.muted { color: var(--muted); font-weight: 400; font-size: 13px; }
.error {
  color: var(--danger);
  background: #fef2f2;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
}

/* ===== 表单 ===== */
.hero { text-align: center; padding: 40px 0; }
.hero h1 { font-size: 28px; }
textarea,
input[type="text"],
input[type="password"],
input[type="email"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 10px;
  font-family: inherit;
}
textarea { resize: vertical; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row input[type="text"] { flex: 1; margin-bottom: 0; min-width: 0; }
.check {
  font-size: 14px;
  color: #4b5563;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
label { display: block; font-size: 13px; color: #6b7280; margin-bottom: 4px; }

.btn,
.btn-primary {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 10px;
  border: 1px solid #d1d5db;
  background: #fff;
  font-size: 14px;
  cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { background: var(--muted); border-color: var(--muted); cursor: not-allowed; }

/* ===== 歌曲列表 ===== */
.song-list { display: flex; flex-direction: column; gap: 12px; }
.song-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  border: 1px solid #f0f1f3;
  border-radius: 10px;
}
.song-info { flex: 1; min-width: 0; }
.song-title { font-weight: 600; }
.song-style { color: var(--muted); font-size: 12px; }
audio { width: 260px; height: 36px; }

/* ============================================================
   响应式三断点：桌面 >1024 / 平板 768–1024 / 移动 <768
   ============================================================ */

/* 平板（768–1024px）：收窄容器、音频条变短 */
@media (max-width: 1024px) {
  .container,
  .topbar-inner { max-width: 720px; }
  audio { width: 200px; }
}

/* 移动（<768px）：纵向堆叠、全宽控件 */
@media (max-width: 768px) {
  .topbar-inner { flex-wrap: wrap; }
  .tagline { display: none; }
  .nav { margin-left: auto; }
  .container { padding: 16px 12px; }
  .panel { padding: 16px; }
  .hero h1 { font-size: 22px; }
  .row { flex-direction: column; align-items: stretch; }
  .row input[type="text"] { width: 100%; margin-bottom: 10px; }
  .song-card { flex-direction: column; align-items: stretch; gap: 8px; }
  audio { width: 100%; }
  .btn,
  .btn-primary { width: 100%; text-align: center; }
}

/* ============================================================
   照片 MV 制作页
   ============================================================ */

.mv-field { margin-bottom: 16px; }

select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
input[type="file"] {
  flex: 1;
  min-width: 0;
  font-size: 13px;
  color: #6b7280;
}

.mv-submit-row { margin-top: 6px; }
.mv-submit-row .muted { margin-left: auto; }

/* ---- 照片网格 ---- */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(104px, 1fr));
  gap: 10px;
  margin-top: 12px;
}
.photo-grid > .muted { grid-column: 1 / -1; }
.photo-item {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: #f3f4f6;
}
.photo-item img {
  display: block;
  width: 100%;
  height: 104px;
  object-fit: cover;
}
.photo-idx {
  position: absolute;
  top: 6px;
  left: 6px;
  min-width: 20px;
  padding: 1px 6px;
  border-radius: 999px;
  background: rgba(17, 24, 39, 0.72);
  color: #fff;
  font-size: 12px;
  text-align: center;
}
.photo-ops {
  position: absolute;
  right: 4px;
  bottom: 4px;
  display: flex;
  gap: 4px;
}
.icon-btn {
  width: 24px;
  height: 24px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
}
.icon-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.icon-btn.danger { color: var(--danger); }

/* ---- 运镜 chips ---- */
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: #4b5563;
  font-size: 13px;
  cursor: pointer;
}
.chip.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

/* ---- 高级折叠 ---- */
.mv-advanced {
  margin: 4px 0 16px;
  padding: 12px 14px;
  border: 1px dashed var(--border);
  border-radius: 10px;
}
.mv-advanced summary { cursor: pointer; font-size: 14px; color: var(--primary); }
.mv-advanced[open] summary { margin-bottom: 12px; }

/* 二级折叠：80 个不支持的效果名铺开会把整屏占满，收起来只留一行 */
.mv-subadvanced { margin-top: 6px; }
.mv-subadvanced summary { cursor: pointer; font-size: 13px; color: var(--primary); }
.mv-subadvanced p { margin: 8px 0 0; line-height: 1.9; }

/* ---- 进度条 ---- */
.progress-bar {
  height: 10px;
  border-radius: 999px;
  background: #eef0f3;
  overflow: hidden;
}
.progress-fill {
  width: 0;
  height: 100%;
  background: var(--primary);
  transition: width 0.4s ease;
}
.mv-result {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}
.mv-result video {
  width: 100%;
  max-width: 300px;
  border-radius: 12px;
  background: #000;
}

/* ---- 我的 MV ---- */
.mv-jobs { display: flex; flex-direction: column; gap: 10px; }
.mv-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid #f0f1f3;
  border-radius: 10px;
}
.mv-info { flex: 1; min-width: 0; }
.mv-title { font-weight: 600; }
.mv-sub { color: var(--muted); font-size: 12px; }
.mv-actions { display: flex; align-items: center; gap: 8px; }

@media (max-width: 768px) {
  .mv-submit-row .muted { margin-left: 0; }
  .mv-card { flex-direction: column; align-items: stretch; gap: 8px; }
  .photo-grid { grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); }
  .photo-item img { height: 88px; }
}