/* ============================================================
   客户前台 - 设计系统
   视觉方向：车载音响仪表盘。深色底 + 琥珀色仪表灯光，
   容量条借鉴车载油量表/电量表的视觉语言。
   移动端优先（客户大概率用手机在车内操作）。
   ============================================================ */

:root {
  --bg: #121317;
  --bg-elevated: #1a1c21;
  --panel: #1e2025;
  --panel-hover: #24262c;
  --border: #2c2f36;
  --border-strong: #3a3e46;

  --text: #edeef0;
  --text-dim: #9aa0a8;
  --text-faint: #676c74;

  --amber: #ffb545;
  --amber-dim: #8a6326;
  --amber-glow: rgba(255, 181, 69, 0.16);

  --good: #35d488;
  --good-dim: #1f7a51;
  --bad: #ff6259;
  --bad-dim: #5c231f;

  --submit-blue: #2f6fed;
  --submit-blue-hover: #4a83f2;
  --submit-blue-dim: #1c3f8c;

  --radius-s: 6px;
  --radius-m: 10px;
  --radius-l: 16px;

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  --font-num: "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;

  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom);
}

a {
  color: inherit;
}

button {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.app-shell {
  max-width: 640px;
  margin: 0 auto;
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* ---------- 顶部状态条（隐约的仪表盘光晕） ---------- */
.dash-glow {
  position: fixed;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 480px;
  height: 240px;
  background: radial-gradient(ellipse at center, var(--amber-glow), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   首页 - 订单验证
   ============================================================ */
.verify-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 32px 24px 64px;
  position: relative;
  z-index: 1;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 40px;
  color: var(--text-dim);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.brand-mark .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 8px var(--amber);
}

.verify-title {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.verify-sub {
  color: var(--text-dim);
  margin: 0 0 32px;
  font-size: 14px;
}

.field-group {
  margin-bottom: 20px;
}

.field-label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.order-input {
  width: 100%;
  padding: 16px 18px;
  font-size: 18px;
  font-family: var(--font-num);
  letter-spacing: 0.04em;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  color: var(--text);
  transition: border-color 0.15s ease;
}

.order-input::placeholder {
  color: var(--text-faint);
  font-family: var(--font-body);
  letter-spacing: normal;
}

.order-input:focus {
  border-color: var(--amber);
}

.order-input.has-error {
  border-color: var(--bad);
}

.btn {
  appearance: none;
  border: none;
  border-radius: var(--radius-m);
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  padding: 15px 20px;
  transition: transform 0.08s ease, opacity 0.15s ease, background 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-amber {
  background: var(--amber);
  color: #1a1305;
  width: 100%;
}

.btn-amber:not(:disabled):hover {
  background: #ffc568;
}

.btn-blue {
  background: var(--submit-blue);
  color: #fff;
}

.btn-blue:not(:disabled):hover {
  background: var(--submit-blue-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border-strong);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text-dim);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
  min-height: 38px;
  border-radius: var(--radius-s);
}

.error-banner {
  margin-top: 16px;
  padding: 14px 16px;
  background: rgba(255, 98, 89, 0.1);
  border: 1px solid var(--bad-dim);
  color: #ffb0ab;
  border-radius: var(--radius-m);
  font-size: 14px;
  line-height: 1.5;
  display: none;
}

.error-banner.visible {
  display: block;
}

/* ============================================================
   公告条（订单验证页 / 选歌页 共用）
   ============================================================ */
.site-announcement {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 16px;
  padding: 12px 14px;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius-m);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

.site-announcement[hidden] {
  display: none;
}

.site-announcement-text {
  flex: 1;
  min-width: 0;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.site-announcement-close {
  flex-shrink: 0;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 18px;
  line-height: 1;
  padding: 0 2px;
  cursor: pointer;
}

/* ============================================================
   选歌页
   ============================================================ */
.select-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding-bottom: 24px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(18, 19, 23, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.cart-btn {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  flex-shrink: 0;
}

.cart-btn svg {
  width: 20px;
  height: 20px;
}

.cart-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  background: var(--amber);
  color: #1a1305;
  font-size: 11px;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  font-family: var(--font-num);
}

.cart-badge[hidden] {
  display: none;
}

.topbar-title {
  flex: 1;
  text-align: center;
  font-size: 13px;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.next-btn {
  flex-shrink: 0;
}

/* 分类 tabs */
.category-tabs {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--border);
}

.category-tabs::-webkit-scrollbar {
  display: none;
}

.category-tab {
  flex-shrink: 0;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
}

.category-tab.active {
  background: var(--amber-glow);
  border-color: var(--amber-dim);
  color: var(--amber);
  font-weight: 600;
}

/* 容量条 */
.capacity-bar-wrap {
  padding: 10px 16px 14px;
  border-bottom: 1px solid var(--border);
}

.capacity-readout {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
}

.capacity-readout .cur {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.capacity-readout .max {
  font-size: 13px;
  color: var(--text-dim);
}

.capacity-track {
  height: 8px;
  border-radius: 4px;
  background: var(--panel);
  border: 1px solid var(--border);
  overflow: hidden;
}

.capacity-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--good), var(--amber));
  border-radius: 4px;
  transition: width 0.2s ease;
  width: 0%;
}

.capacity-fill.at-limit {
  background: var(--bad);
}

/* 搜索 */
.search-row {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
}

.search-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  color: var(--text);
  font-size: 14px;
}

.search-input::placeholder {
  color: var(--text-faint);
}

/* 歌曲列表 */
.song-list {
  flex: 1;
  padding: 4px 8px 100px;
}

.song-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 8px;
  border-bottom: 1px solid var(--border);
}

.song-add-btn {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-s);
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--text);
  font-size: 19px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

.song-add-btn.added {
  background: var(--good-dim);
  border-color: var(--good);
  color: var(--good);
}

.song-add-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.song-meta {
  flex: 1;
  min-width: 0;
}

.song-title-row {
  display: flex;
  gap: 6px;
  align-items: baseline;
  overflow: hidden;
}

.song-number {
  font-family: var(--font-num);
  color: var(--amber);
  font-size: 12.5px;
  flex-shrink: 0;
}

.song-name {
  font-size: 14.5px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.song-size {
  font-size: 12px;
  color: var(--text-dim);
  font-family: var(--font-num);
  margin-top: 2px;
}

.clip-controls {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.clip-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.clip-label {
  font-size: 9px;
  line-height: 1;
  color: var(--text-dim);
  white-space: nowrap;
}

.clip-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 12px;
  flex-shrink: 0;
}

.clip-btn.playing {
  background: var(--amber);
  border-color: var(--amber);
  color: #1a1305;
}

.clip-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

.empty-state {
  text-align: center;
  color: var(--text-dim);
  padding: 60px 20px;
  font-size: 14px;
}

.loading-row {
  text-align: center;
  color: var(--text-faint);
  padding: 24px;
  font-size: 13px;
}

/* ---------- 底部固定"下一步"（移动端更方便触达） ---------- */
.bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 25;
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  background: linear-gradient(180deg, rgba(18, 19, 23, 0) 0%, var(--bg) 40%);
}

.bottom-bar-inner {
  max-width: 640px;
  margin: 0 auto;
}

/* ---------- 购物车抽屉 ---------- */
.cart-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.cart-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.cart-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(340px, 86vw);
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  z-index: 41;
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  transition: transform 0.22s ease;
}

.cart-drawer.open {
  transform: translateX(0);
}

.cart-drawer-header {
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cart-drawer-header h2 {
  margin: 0;
  font-size: 16px;
}

.cart-close-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 20px;
  cursor: pointer;
  padding: 4px 8px;
}

.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: 8px 16px;
}

.cart-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.cart-item-meta {
  flex: 1;
  min-width: 0;
}

.cart-item-name {
  font-size: 13.5px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cart-item-size {
  font-size: 12px;
  color: var(--text-dim);
  font-family: var(--font-num);
}

.cart-remove-btn {
  background: none;
  border: none;
  color: var(--bad);
  font-size: 13px;
  cursor: pointer;
  padding: 6px 8px;
  flex-shrink: 0;
}

.cart-empty {
  text-align: center;
  color: var(--text-faint);
  padding: 40px 16px;
  font-size: 13.5px;
}

.cart-drawer-footer {
  padding: 14px 16px calc(14px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
}

/* ============================================================
   确认页
   ============================================================ */
.confirm-screen {
  flex: 1;
  padding: 16px 16px 120px;
}

.confirm-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0 20px;
}

.back-btn {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-m);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

.confirm-header h1 {
  font-size: 18px;
  margin: 0;
}

.summary-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  padding: 18px;
  margin-bottom: 20px;
}

.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 4px;
}

.summary-item .label {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.summary-item .value {
  font-size: 18px;
  font-weight: 700;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
}

.category-block {
  margin-bottom: 18px;
}

.category-block h3 {
  font-size: 13px;
  color: var(--amber);
  margin: 0 0 8px;
  font-weight: 600;
}

.confirm-song-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13.5px;
}

.confirm-song-row .name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.confirm-song-row .size {
  color: var(--text-dim);
  font-family: var(--font-num);
  flex-shrink: 0;
}

.submit-status {
  text-align: center;
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 10px;
}

/* ============================================================
   完成反馈页
   ============================================================ */
.done-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 56px 24px 40px;
}

.done-check {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: var(--good-dim);
  border: 2px solid var(--good);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.done-check svg {
  width: 42px;
  height: 42px;
  stroke: var(--good);
}

.done-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 4px;
}

.done-order-number {
  color: var(--text-dim);
  font-family: var(--font-num);
  font-size: 13px;
  margin-bottom: 36px;
}

.status-timeline {
  width: 100%;
  max-width: 380px;
}

.status-step {
  display: flex;
  gap: 14px;
  position: relative;
}

.status-step .rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.status-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--panel);
  border: 2px solid var(--border-strong);
  flex-shrink: 0;
  margin-top: 2px;
}

.status-line {
  width: 2px;
  flex: 1;
  background: var(--border);
  min-height: 28px;
}

.status-step:last-child .status-line {
  display: none;
}

.status-label {
  padding-bottom: 26px;
  font-size: 14px;
  color: var(--text-dim);
  padding-top: 0;
}

.status-step.done .status-dot {
  background: var(--good-dim);
  border-color: var(--good);
}

.status-step.done .status-label {
  color: var(--text);
}

.status-step.done .status-line {
  background: var(--good-dim);
}

.status-step.active .status-dot {
  background: var(--amber-glow);
  border-color: var(--amber);
  box-shadow: 0 0 0 4px var(--amber-glow);
}

.status-step.active .status-label {
  color: var(--amber);
  font-weight: 600;
}

.status-step.next .status-dot {
  background: rgba(53, 212, 136, 0.14);
  border-color: #79e8ae;
}

.status-step.next .status-label {
  color: #79e8ae;
}

.status-step.next .status-line {
  background: var(--border);
}

.status-step.pending .status-dot {
  background: var(--panel);
  border-color: var(--border);
}

.status-step.pending .status-label {
  color: var(--text-faint);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 12px 18px;
  border-radius: var(--radius-m);
  font-size: 13.5px;
  z-index: 100;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  max-width: 88vw;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  pointer-events: none;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- 全屏加载 ---------- */
.full-loading {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 14px;
  padding: 60px;
}

.spinner {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--border-strong);
  border-top-color: var(--amber);
  animation: spin 0.7s linear infinite;
  margin-right: 10px;
}

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

@media (min-width: 720px) {
  .song-row {
    padding: 10px 12px;
  }

  .song-name {
    font-size: 14px;
  }
}