/* ===========================================================================
   RoomTalk · 样式
   目标：首屏只有一件事要用户做（输口令），进入后只有一件事要用户做（说话）。
   =========================================================================== */

:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-2: #f0f1f4;
  --text: #14171a;
  --muted: #697586;
  --line: #e3e6ea;
  --accent: #2f6df6;
  --accent-ink: #ffffff;
  --ok: #12a150;
  --warn: #e08d0b;
  --danger: #d93a3a;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a21;
    --surface-2: #1e222b;
    --text: #e8eaed;
    --muted: #98a2b3;
    --line: #262b36;
    --accent: #4a83ff;
    --ok: #2fbf6d;
    --warn: #e8a33d;
    --danger: #f05656;
    --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 8px 24px rgba(0, 0, 0, .35);
  }
}

[hidden] { display: none !important; }   /* 必须！类选择器的 display 会压过 UA 的 [hidden] */

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overscroll-behavior: none;
}

button, input { font: inherit; color: inherit; }

button { cursor: pointer; }

/* ============================ 按钮 ============================ */

.primary {
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--accent-ink);
  padding: 11px 18px;
  font-weight: 600;
  transition: filter .15s, opacity .15s;
}
.primary:hover:not(:disabled) { filter: brightness(1.06); }
.primary:disabled { opacity: .45; cursor: default; }

.icon {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  font-size: 16px;
  line-height: 1;
  transition: background .15s, border-color .15s, transform .1s;
}
.icon:hover { background: var(--surface-2); }
.icon:active { transform: scale(.94); }
.icon.on {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.icon.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 30%, var(--line)); }
.icon.danger:hover { background: color-mix(in srgb, var(--danger) 10%, var(--surface)); }

/* 画质档位。刻意用原生 select 而不是自绘菜单：
   手机上点开就是系统选择器，可点区域大、不用自己处理定位和点外关闭。 */
.quality {
  flex: none;
  height: 38px;
  padding: 0 6px 0 9px;
  font: inherit;
  font-size: 12.5px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 19px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.quality:hover { background: var(--surface-2); }
.quality:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

/* 行内小按钮（身份提示条上用） */
.mini {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  padding: 4px 11px;
  font-size: 12px;
  line-height: 1.5;
  white-space: nowrap;
  transition: background .15s, border-color .15s;
}
.mini:hover { background: var(--surface-2); }
.mini.danger {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 35%, var(--line));
}
.mini.danger:hover { background: color-mix(in srgb, var(--danger) 10%, var(--surface)); }

/* ============================ 入口 ============================ */

.gate {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 30px 26px 26px;
}

.card h1 {
  margin: 0 0 6px;
  font-size: 21px;
  font-weight: 650;
  letter-spacing: .01em;
  text-align: center;
}

.lede {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 13.5px;
}

.field {
  position: relative;
  margin-bottom: 14px;
}

.field input {
  width: 100%;
  padding: 12px 62px 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  outline: none;
  transition: border-color .15s, background .15s;
}
.field input:focus {
  border-color: var(--accent);
  background: var(--surface);
}
.field input::placeholder { color: var(--muted); }

.reveal {
  position: absolute;
  top: 50%; right: 8px;
  transform: translateY(-50%);
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 12.5px;
  padding: 6px 8px;
  border-radius: 6px;
}
.reveal:hover { color: var(--text); background: var(--surface-2); }

.card .primary { width: 100%; }

.hint {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.error {
  margin: 12px 0 0;
  color: var(--danger);
  font-size: 13px;
  text-align: center;
}

.foot {
  max-width: 420px;
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.7;
  text-align: center;
}

/* 页脚：隐私说明 + 联系方式。包一层，免得 .gate 的 22px 间距把两段小字撑开。 */
.page-foot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  max-width: 420px;
}

.contact {
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.8;
  text-align: center;
}
.contact a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: color-mix(in srgb, currentColor 32%, transparent);
}
.contact a:hover { color: var(--text); }

/* ============================ 房间 ============================ */

.room {
  height: 100dvh;
  display: flex;
  flex-direction: column;
}

.bar {
  flex: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  padding-top: max(10px, env(safe-area-inset-top));
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.dot {
  flex: none;
  width: 10px; height: 10px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--muted);
  transition: background .2s;
}
.dot.waiting { background: var(--warn); animation: pulse 1.8s ease-in-out infinite; }
.dot.online  { background: var(--ok); }
.dot.warn    { background: var(--danger); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: .3; }
}

.status {
  flex: 1;
  min-width: 0;
  font-size: 13.5px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bar-actions { display: flex; gap: 8px; }

/* ---------------------------- 对方身份提示条 ---------------------------- */

.trust {
  flex: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  font-size: 12.5px;
  line-height: 1.5;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--muted);
}
.trust.new {
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  color: var(--text);
}
.trust.warn {
  background: color-mix(in srgb, var(--warn) 14%, var(--surface));
  color: var(--text);
}
.trust-text { flex: 1; min-width: 0; }
.trust-actions { display: flex; gap: 6px; flex: none; }

/* ---------------------------- 视频舞台 ---------------------------- */

.stage {
  flex: none;
  position: relative;
  background: #0b0d11;
  aspect-ratio: 16 / 10;
  max-height: 44dvh;
  overflow: hidden;
}
@media (orientation: portrait) {
  .stage { aspect-ratio: 3 / 4; max-height: 40dvh; }
}

.stage video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #0b0d11;
}

.stage .remote { position: absolute; inset: 0; }

.stage .local {
  position: absolute;
  right: 10px; bottom: 10px;
  width: 26%;
  max-width: 130px;
  aspect-ratio: 3 / 4;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, .18);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .4);
}

.stage-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #8a93a3;
  font-size: 13px;
  pointer-events: none;
}

/* ---------------------------- 消息 ---------------------------- */

.log {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  scrollbar-width: thin;
}

.msg {
  max-width: min(78%, 560px);
  padding: 9px 13px;
  border-radius: 16px;
  font-size: 14.5px;
  line-height: 1.5;
  word-break: break-word;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  animation: rise .16s ease-out;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: none; }
}

.msg.me {
  align-self: flex-end;
  background: var(--accent);
  color: var(--accent-ink);
  border-bottom-right-radius: 5px;
}

.msg.them {
  align-self: flex-start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-bottom-left-radius: 5px;
}

.notice {
  align-self: center;
  max-width: 90%;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

/* ---------------------------- 输入栏 ---------------------------- */

.composer {
  flex: none;
  display: flex;
  gap: 8px;
  padding: 10px 12px;
  padding-bottom: max(10px, env(safe-area-inset-bottom));
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.composer input {
  flex: 1;
  min-width: 0;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-2);
  outline: none;
  transition: border-color .15s, background .15s;
}
.composer input:focus { border-color: var(--accent); background: var(--surface); }
.composer input::placeholder { color: var(--muted); }

.composer .primary {
  flex: none;
  border-radius: 999px;
  padding: 11px 20px;
}

/* ============================ 浮层提示 ============================ */

.toast {
  position: fixed;
  left: 50%;
  bottom: max(78px, calc(env(safe-area-inset-bottom) + 78px));
  transform: translateX(-50%);
  max-width: min(88vw, 420px);
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(20, 23, 26, .92);
  color: #fff;
  font-size: 13px;
  text-align: center;
  z-index: 20;
  animation: rise .18s ease-out;
}