/**
 * BOARDinG AI · 全站壳层（与首页 index.html 深色 Discord 系一致）
 * 手机端要点：
 * - 顶栏高度 --bw-bar-h + safe-area-inset-top（刘海屏）
 * - 内容区左右 padding：桌面 24px / 手机 16px；底部 safe-area-inset-bottom
 * - 触控目标建议 ≥44px（按钮、链接 hit area）
 */
:root {
  --bw-deep: #111214;
  --bw-bg: #232428;
  --bw-elev: #2b2d31;
  --bw-border: hsla(0, 0%, 100%, 0.06);
  --bw-blurple: #5865f2;
  --bw-blurple-h: #4752c4;
  --bw-text: #f2f3f5;
  --bw-muted: #b5bac1;
  --bw-subtle: #949ba4;
  --bw-bar-h: 48px;
  --bw-font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
}

/* —— 简易子页：顶栏 + 主内容（/tools/text、/tools/ai-talk、/agent/*） */
.bw-page {
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  font-family: var(--bw-font);
  background: var(--bw-deep);
  color: var(--bw-text);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

.bw-page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -15%, rgba(88, 101, 242, 0.18), transparent 55%),
    linear-gradient(180deg, var(--bw-deep) 0%, #0c0d0f 100%);
}

.bw-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: var(--bw-bar-h);
  padding: 0 max(20px, env(safe-area-inset-left)) 0 max(20px, env(safe-area-inset-right));
  padding-top: env(safe-area-inset-top);
  backdrop-filter: blur(14px);
  background: rgba(17, 18, 20, 0.92);
  border-bottom: 1px solid var(--bw-border);
}

.bw-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--bw-text);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: none;
}

.bw-brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--bw-blurple), #7289da);
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 12px rgba(88, 101, 242, 0.35);
}

.bw-topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.bw-link {
  color: var(--bw-muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 10px;
  transition: color 0.15s, background 0.15s;
}

.bw-link:hover {
  color: var(--bw-text);
  background: rgba(255, 255, 255, 0.06);
}

.bw-main {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: max(24px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-left))
    max(32px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-right));
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* 长页面：顶对齐 + 可滚动 */
.bw-main--scroll {
  justify-content: flex-start;
}

/* 卡片：与首页 Featured / 工具卡同系 */
.bw-card {
  width: 100%;
  background: var(--bw-elev);
  border: 1px solid var(--bw-border);
  border-radius: 16px;
  padding: 26px 22px;
  line-height: 1.55;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.bw-card h1 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  font-weight: 800;
}

.bw-card p,
.bw-card .hint {
  margin: 0 0 12px;
  font-size: 0.92rem;
  color: var(--bw-muted);
}

.bw-card a {
  color: var(--bw-blurple);
  font-weight: 600;
}

.bw-panel {
  background: var(--bw-elev);
  border: 1px solid var(--bw-border);
  border-radius: 14px;
  padding: 18px 16px;
  margin-bottom: 14px;
}

.bw-panel h2 {
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 800;
}

.bw-panel ul {
  margin: 0;
  padding-left: 18px;
  color: var(--bw-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

.bw-panel code {
  font-size: 12px;
  background: #1e1f22;
  padding: 2px 6px;
  border-radius: 6px;
}

.bw-btn {
  display: inline-block;
  padding: 10px 16px;
  background: var(--bw-blurple);
  color: #fff !important;
  text-decoration: none;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 700;
}

.bw-btn:hover {
  background: var(--bw-blurple-h);
}

@media (max-width: 480px) {
  .bw-main {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }

  .bw-topbar {
    padding-left: max(14px, env(safe-area-inset-left));
    padding-right: max(14px, env(safe-area-inset-right));
  }

  .bw-brand {
    font-size: 0.82rem;
  }

  .bw-brand-mark {
    width: 30px;
    height: 30px;
    font-size: 0.62rem;
  }
}

/* —— 教练页顶栏：深色条 + 下方仍为原浅色对话区 */
body.bw-coach-body {
  margin: 0;
}

a.bw-coach-strip {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2147483000;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: calc(var(--bw-bar-h) + env(safe-area-inset-top, 0px));
  padding: env(safe-area-inset-top, 0px) max(12px, env(safe-area-inset-left)) 0
    max(12px, env(safe-area-inset-right));
  padding-bottom: 0;
  box-sizing: border-box;
  background: rgba(17, 18, 20, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--bw-border);
  text-decoration: none;
  color: var(--bw-text);
  font-family: var(--bw-font);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

a.bw-coach-strip .bw-strip-title {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

a.bw-coach-strip .bw-strip-sub {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--bw-blurple);
  flex-shrink: 0;
}

/* 手机：原 .app 为 fixed 全屏，整体上移并缩短高度，避免与顶栏重叠 */
body.bw-coach-body .app {
  top: calc(var(--bw-bar-h) + env(safe-area-inset-top, 0px));
  height: calc(100dvh - var(--bw-bar-h) - env(safe-area-inset-top, 0px));
  max-height: calc(100dvh - var(--bw-bar-h) - env(safe-area-inset-top, 0px));
}

/* 桌面：coach 内 .app 变为 relative，用 margin-top 让出顶栏 + 保留原上下留白 */
@media (min-width: 600px) {
  body.bw-coach-body .app {
    position: relative !important;
    inset: auto !important;
    top: auto !important;
    margin-top: calc(8px + var(--bw-bar-h) + env(safe-area-inset-top, 0px)) !important;
    margin-left: auto !important;
    margin-right: auto !important;
    margin-bottom: 8px !important;
    height: calc(100dvh - var(--bw-bar-h) - env(safe-area-inset-top, 0px) - 24px) !important;
    max-height: calc(100dvh - var(--bw-bar-h) - env(safe-area-inset-top, 0px) - 24px) !important;
    max-width: 560px !important;
    border-radius: 12px;
    overflow: hidden;
  }
}