/* 英语口语配对练习 — 移动端 UI（与设计稿对齐） */

:root {
  /* 浅色页（首页 / 预约 / 我的预约） */
  --bg-page: #f8f9fa;
  --bg-card: #ffffff;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --border-light: #e5e7eb;
  --blue-primary: #1a5cff;
  --blue-soft: #7096ff;
  --blue-soft-bg: #eef2ff;
  --blue-soft-border: #4f46e5;
  --blue-tip-bg: #eff6ff;
  --blue-tip-text: #1d4ed8;
  --nav-active: #1a5cff;
  --nav-inactive: #9ca3af;
  --tag-done-bg: #e6f4ea;
  --tag-done-text: #1e8e3e;
  --tag-pending-bg: #e8f0fe;
  --tag-pending-text: #1967d2;
  --danger: #d93025;
  --radius-card: 12px;
  --radius-btn: 12px;
  --shadow-card: 0 4px 14px rgba(17, 24, 39, 0.06);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --tab-h: 56px;

  /* 房间页深色（任务确认稿：背景 #1A2233） */
  --room-bg: #1a2233;
  --room-surface: #222a3d;
  --room-border: rgba(255, 255, 255, 0.1);
  --room-blue: #2563eb;
  --room-red: #ef4444;
  --task-energy: #f97316;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.45;
  min-height: 100dvh;
  padding-bottom: calc(var(--tab-h) + var(--safe-bottom) + 12px);
}

body.page-room {
  background: var(--room-bg);
  color: #f3f4f6;
  padding-bottom: calc(88px + var(--safe-bottom));
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* —— 布局 —— */
.app-shell {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 16px 0;
}

.page-room .app-shell {
  padding-bottom: 8px;
}

.room-ios-banner {
  margin: 0 0 12px;
  padding: 10px 12px;
  border-radius: 10px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  font-size: 0.8125rem;
  line-height: 1.45;
}

.room-toast {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(88px + var(--safe-bottom));
  max-width: 90%;
  padding: 10px 14px;
  border-radius: 10px;
  background: rgba(31, 41, 55, 0.95);
  color: #f3f4f6;
  font-size: 0.8125rem;
  z-index: 200;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.room-toast--error {
  background: rgba(127, 29, 29, 0.95);
}

.room-toast[hidden] {
  display: none !important;
}

/* 对方确认条（非模态，贴底栏上方） */
.partner-confirm-bar {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(88px + var(--safe-bottom));
  width: calc(100% - 24px);
  max-width: 456px;
  padding: 12px 14px;
  background: rgba(30, 41, 59, 0.98);
  border: 1px solid var(--room-border);
  border-radius: 12px;
  z-index: 150;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.partner-confirm-bar[hidden] {
  display: none !important;
}

.partner-confirm-text {
  margin: 0 0 12px;
  font-size: 0.875rem;
  color: #e2e8f0;
  line-height: 1.45;
}

.partner-confirm-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.partner-confirm-btn {
  min-height: 44px;
  padding: 0 18px;
  border: none;
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.partner-confirm-btn--ok {
  background: var(--room-blue);
  color: #fff;
}

.partner-confirm-btn--deny {
  background: #334155;
  color: #e2e8f0;
}

/* —— 首页头部 —— */
.home-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.home-header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.home-header .sub {
  margin: 6px 0 0;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.credit-pill {
  text-align: right;
  flex-shrink: 0;
}

.credit-pill .label {
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.credit-pill .value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--blue-primary);
  line-height: 1.1;
}

/* —— 主题卡片 —— */
.topic-card {
  display: block;
  color: inherit;
  text-decoration: none;
  background: var(--bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  margin-bottom: 16px;
}

.topic-card .cover {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #64748b 0%, #334155 100%);
  object-fit: cover;
  width: 100%;
}

.topic-card .body {
  padding: 14px 16px 16px;
}

.topic-card h2 {
  margin: 0 0 6px;
  font-size: 1.0625rem;
  font-weight: 700;
}

.topic-card p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* —— 预约页顶栏 —— */
.top-bar {
  margin: 0 0 12px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--blue-soft);
  font-size: 0.9375rem;
  font-weight: 500;
}

.back-link svg {
  width: 18px;
  height: 18px;
}

.theme-hero {
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 12px;
  box-shadow: var(--shadow-card);
}

.theme-hero .cover {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  background: linear-gradient(135deg, #1e3a5f 0%, #0f172a 100%);
}

.theme-hero-text h1 {
  margin: 12px 0 6px;
  font-size: 1.375rem;
  font-weight: 700;
}

.theme-hero-text p {
  margin: 0 0 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.section-title {
  margin: 22px 0 12px;
  font-size: 1rem;
  font-weight: 700;
}

/* —— 时间段网格 —— */
.slot-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.slot-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 14px 12px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.slot-card .time {
  font-size: 1.0625rem;
  font-weight: 600;
}

.slot-card .meta {
  margin-top: 4px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.slot-card.selected {
  background: var(--blue-soft-bg);
  border-color: var(--blue-soft-border);
  color: var(--blue-soft-border);
}

.slot-card.selected .meta {
  color: var(--blue-soft-border);
  opacity: 0.85;
}

/* —— 水平三选一 —— */
.level-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}

.level-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 12px 8px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.level-card .lv {
  font-size: 0.875rem;
  font-weight: 700;
}

.level-card .hint {
  margin-top: 4px;
  font-size: 0.625rem;
  color: var(--text-secondary);
  line-height: 1.3;
}

.level-card.selected {
  background: var(--blue-soft-bg);
  border-color: var(--blue-soft-border);
}

.level-card.selected .lv {
  color: var(--blue-soft-border);
}

.level-card.selected .hint {
  color: #6366f1;
}

/* —— 提示条 —— */
.tip-box {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: 18px;
  padding: 12px 14px;
  background: var(--blue-tip-bg);
  border-radius: 10px;
  font-size: 0.8125rem;
  color: var(--blue-tip-text);
  line-height: 1.5;
}

.tip-box .icon {
  flex-shrink: 0;
  font-size: 1rem;
}

/* —— 主按钮 —— */
.btn-primary {
  display: block;
  width: 100%;
  margin-top: 24px;
  padding: 14px 20px;
  border: none;
  border-radius: var(--radius-btn);
  background: var(--blue-soft);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(112, 150, 255, 0.35);
}

.btn-primary:active {
  transform: scale(0.99);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

/* —— 我的预约卡片 —— */
.appt-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 16px;
  margin-bottom: 14px;
}

.appt-card .row-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 10px;
}

.appt-card h2 {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
}

.status-tag {
  flex-shrink: 0;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 600;
}

.status-tag.done {
  background: var(--tag-done-bg);
  color: var(--tag-done-text);
}

.status-tag.pending {
  background: var(--tag-pending-bg);
  color: var(--tag-pending-text);
}

.status-tag.paired {
  background: #ede9fe;
  color: #5b21b6;
}

.appt-meta {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.btn-enter {
  display: block;
  width: 100%;
  margin-top: 14px;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: var(--blue-primary);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
}

.cancel-link {
  display: block;
  margin-top: 10px;
  text-align: right;
  font-size: 0.8125rem;
  color: var(--danger);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  width: 100%;
}

/* 取消预约：内联二次确认 */
.cancel-flow {
  margin-top: 12px;
}

.cancel-trigger {
  display: block;
  width: 100%;
  margin-top: 10px;
  text-align: right;
  font-size: 0.8125rem;
  color: var(--danger);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.cancel-panel[hidden] {
  display: none !important;
}

.cancel-panel {
  margin-top: 4px;
}

.cancel-ask {
  margin: 0 0 10px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.cancel-btns {
  display: flex;
  gap: 10px;
}

.btn-cancel-dismiss {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  background: #f3f4f6;
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
}

.btn-cancel-confirm {
  flex: 1;
  padding: 10px 14px;
  border: none;
  border-radius: 10px;
  background: var(--danger);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

/* —— 底部导航 —— */
.bottom-nav {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  width: 100%;
  max-width: 480px;
  height: calc(var(--tab-h) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: #fff;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 100;
}

.bottom-nav a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px;
  font-size: 0.6875rem;
  color: var(--nav-inactive);
}

.bottom-nav a.active {
  color: var(--nav-active);
}

.bottom-nav svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
}

/* —— 房间页 —— */
.room-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-top: 4px;
}

.room-top .topic {
  font-size: 1rem;
  font-weight: 600;
  max-width: 65%;
}

.room-timer {
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.25);
  color: #93c5fd;
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.video-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 18px;
}

.video-tile {
  aspect-ratio: 3 / 4;
  background: var(--room-surface);
  border-radius: 12px;
  border: 1px solid var(--room-border);
  display: block;
  padding: 0;
  position: relative;
  overflow: hidden;
}

/* Agora 播放在此层铺满，避免与占位 flex 子项抢高度导致只显示一条细带 */
.video-tile__media {
  position: absolute;
  inset: 0;
  z-index: 1;
  border-radius: inherit;
  overflow: hidden;
}

.video-tile__media video {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
  display: block;
}

.video-tile__standby {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px;
  text-align: center;
  background: var(--room-surface);
  transition: opacity 0.2s ease;
}

.video-tile--remote-live .video-tile__standby {
  opacity: 0;
  pointer-events: none;
}

.video-tile .avatar-placeholder {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #374151;
  margin-bottom: 8px;
}

.video-tile .label {
  font-size: 0.8125rem;
  color: #9ca3af;
}

.video-tile .badge-me {
  position: absolute;
  left: 8px;
  bottom: 8px;
  z-index: 3;
  font-size: 0.6875rem;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.45);
  color: #e5e7eb;
}

.room-section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.room-section-head h3 {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
}

.btn-swap {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--room-border);
  background: transparent;
  color: #d1d5db;
  font-size: 0.75rem;
  cursor: pointer;
}

.role-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}

.role-card {
  background: var(--room-surface);
  border: 1px solid var(--room-border);
  border-radius: 12px;
  padding: 14px 12px;
  text-align: center;
  font-size: 0.875rem;
}

.role-card.active {
  border-color: var(--room-blue);
  box-shadow: 0 0 0 1px var(--room-blue);
}

.prompts-head {
  font-size: 0.75rem;
  color: #6b7280;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.prompt-item {
  background: var(--room-surface);
  border: 1px solid var(--room-border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 8px;
  font-size: 0.875rem;
  color: #e5e7eb;
  line-height: 1.5;
}

.room-controls {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  width: 100%;
  max-width: 480px;
  padding: 16px 24px calc(16px + var(--safe-bottom));
  background: linear-gradient(transparent, rgba(18, 24, 38, 0.95));
  display: flex;
  justify-content: center;
  gap: 28px;
  z-index: 100;
}

.ctrl-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: #374151;
  color: #fff;
}

.ctrl-btn.end {
  background: var(--room-red);
}

.ctrl-btn.end svg {
  transform: rotate(135deg);
}

.ctrl-btn svg {
  width: 24px;
  height: 24px;
}

/* —— 任务确认 UI（设计稿：顶栏任务卡 + 中部通话区 + 底栏控制） —— */
.task-room-role {
  margin: 0 0 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #94a3b8;
  letter-spacing: 0.02em;
}

.task-confirm-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.task-confirm-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
  background: var(--room-surface);
  border: 1px solid var(--room-border);
  border-radius: var(--radius-card);
}

.task-confirm-card:last-child {
  margin-bottom: 0;
}

.task-confirm-card.is-done {
  opacity: 0.65;
  border-color: rgba(34, 197, 94, 0.35);
}

.task-confirm-main {
  flex: 1;
  min-width: 0;
}

.task-confirm-title {
  margin: 0 0 6px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #f8fafc;
  line-height: 1.35;
}

.task-confirm-reward {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--task-energy);
}

.task-confirm-reward .ico {
  font-size: 1rem;
  line-height: 1;
}

.task-complete-btn {
  flex-shrink: 0;
  min-height: 44px;
  padding: 0 18px;
  border: none;
  border-radius: 10px;
  background: var(--room-blue);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}

.task-complete-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.task-complete-btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.task-complete-btn.is-waiting {
  background: #475569;
  font-size: 0.75rem;
  padding: 0 12px;
  max-width: 42%;
}

.task-complete-btn.is-done {
  background: rgba(34, 197, 94, 0.25);
  color: #86efac;
  border: 1px solid rgba(34, 197, 94, 0.4);
}

.task-call-stage {
  min-height: 160px;
  margin-bottom: 12px;
  padding: 16px;
  border-radius: 12px;
  border: 1px dashed var(--room-border);
  background: rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.task-call-hint {
  margin: 0;
  font-size: 0.8125rem;
  color: #64748b;
}

.video-row--compact {
  width: 100%;
  max-width: 320px;
  margin: 0;
}

.video-row--compact .video-tile {
  aspect-ratio: 4 / 3;
  min-height: 88px;
}

.room-extra {
  margin-top: 8px;
  border-radius: 10px;
  border: 1px solid var(--room-border);
  background: rgba(0, 0, 0, 0.15);
  overflow: hidden;
}

.room-extra summary {
  padding: 10px 14px;
  font-size: 0.8125rem;
  color: #94a3b8;
  cursor: pointer;
  list-style: none;
}

.room-extra summary::-webkit-details-marker {
  display: none;
}

.room-extra[open] summary {
  border-bottom: 1px solid var(--room-border);
}

.room-extra-inner {
  padding: 12px 14px 14px;
}

.page-title-simple {
  margin: 0 0 18px;
  font-size: 1.375rem;
  font-weight: 700;
  color: #1e3a5f;
}

/* —— 登录态 / 注册登录表单 —— */
.session-bar {
  margin-top: 8px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.session-bar a {
  color: var(--blue-primary);
  font-weight: 500;
}

.session-bar button {
  margin-left: 10px;
  padding: 4px 10px;
  font-size: 0.75rem;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  background: var(--bg-card);
  color: var(--text-secondary);
}

.auth-page .page-title-simple {
  margin-top: 8px;
}

.auth-form label {
  display: block;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.auth-form input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-btn);
  margin-bottom: 14px;
  font-size: 1rem;
}

.auth-form button[type="submit"] {
  width: 100%;
  padding: 14px;
  margin-top: 4px;
  background: var(--blue-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-btn);
  font-size: 1rem;
  font-weight: 600;
}

.auth-footer {
  margin-top: 20px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-align: center;
}

.auth-footer a {
  color: var(--blue-primary);
  font-weight: 500;
}

.auth-error {
  color: var(--danger);
  font-size: 0.875rem;
  margin-bottom: 10px;
  min-height: 1.25em;
}

.booking-poll-status,
.appt-poll-status {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin: 0 0 12px;
}

.booking-poll-status--error,
.appt-poll-status--error {
  color: var(--danger);
}

.booking-empty {
  margin: 16px 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

@media (min-width: 480px) {
  .app-shell {
    padding-left: 20px;
    padding-right: 20px;
  }
}