/**
 * desktop-shell/theme.css · 方案 B 沉浸技术派设计令牌
 * Type Scale: 1.25 (Major Third) — typography-advisor 对齐
 */
:root {
  --ds-bg-deep: #0A0810;
  --ds-bg-panel: rgba(26, 22, 48, 0.65);
  --ds-bg-chrome: rgba(18, 15, 32, 0.78);
  --ds-text-primary: #F1F5F9;
  --ds-text-secondary: #94A3B8;
  --ds-text-muted: #64748B;
  --ds-border: rgba(255, 255, 255, 0.08);
  --ds-border-glow: rgba(34, 211, 238, 0.22);
  --ds-radius-sm: 8px;
  --ds-radius-md: 12px;
  --ds-radius-lg: 14px;
  --ds-shadow-panel: 0 0 0 1px rgba(34, 211, 238, 0.08), 0 24px 64px rgba(0, 0, 0, 0.45);
  --ds-font-display: Inter, 'PingFang SC', 'Noto Sans SC', sans-serif;
  --ds-font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --ds-titlebar-h: 48px;
  --ds-type-xs: 0.64rem;
  --ds-type-sm: 0.8rem;
  --ds-type-base: 1rem;
  --ds-type-lg: 1.25rem;
  --ds-type-xl: 1.563rem;
  --ds-type-2xl: 1.953rem;
  --ds-accent: #7C3AED;
  --ds-live: #22D3EE;
  --ds-success: #34D399;
  --ds-glow-purple: rgba(124, 58, 237, 0.22);
  --ds-glow-cyan: rgba(34, 211, 238, 0.15);
}

[data-desktop-role="student"] {
  --ds-accent: #EA580C;
  --ds-live: #F59E0B;
  --ds-glow-purple: rgba(245, 158, 11, 0.18);
  --ds-glow-cyan: rgba(234, 88, 12, 0.12);
}

/* box-sizing 重置仅作用于桌面壳自有元素（.ds-* / #ds-titlebar 等），
   避免污染原 web 页面（如 THE_FINAL_ULTIMATE_SYSTEM.html）按 content-box 设计的 flex 布局：
   旧规则 `* { box-sizing: border-box }` 会把 main-stage 挤到 2px 宽。 */
[class^="ds-"],
[class*=" ds-"],
[class^="ds-"]::before,
[class^="ds-"]::after,
#ds-titlebar,
#ds-titlebar * {
  box-sizing: border-box;
}

html.ds-chrome-pad,
html.ds-chrome-pad body {
  margin: 0;
  padding-top: var(--ds-titlebar-h);
}

body.ds-immersive {
  font-family: var(--ds-font-display);
  background: var(--ds-bg-deep);
  color: var(--ds-text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

body.ds-immersive::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 60% 50% at 0% 0%, var(--ds-glow-purple), transparent 55%),
    radial-gradient(ellipse 50% 40% at 100% 100%, var(--ds-glow-cyan), transparent 50%);
}

.ds-panel {
  background: var(--ds-bg-panel);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  backdrop-filter: blur(12px);
  box-shadow: var(--ds-shadow-panel);
}

.ds-hud {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-type-xs);
  letter-spacing: 0.14em;
  color: var(--ds-live);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ds-hud-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ds-success);
  box-shadow: 0 0 8px var(--ds-success);
  animation: ds-pulse 2s ease-in-out infinite;
}

@keyframes ds-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}

@keyframes ds-bar-sweep {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(200%); }
}

@keyframes ds-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes ds-quest-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.ds-cta-live {
  background: linear-gradient(135deg, var(--ds-live), color-mix(in srgb, var(--ds-live) 80%, #000));
  color: #0A0810;
  font-weight: 700;
  border: none;
  border-radius: var(--ds-radius-sm);
  padding: 10px 18px;
  cursor: pointer;
  box-shadow: 0 0 24px color-mix(in srgb, var(--ds-live) 35%, transparent);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.ds-cta-live:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 32px color-mix(in srgb, var(--ds-live) 45%, transparent);
}

.ds-cta-live:active {
  transform: translateY(0) scale(0.98);
}

/* 非直播功能按钮：标注「在网页端打开」 */
.ds-web-link::after {
  content: ' \2197';
  opacity: 0.55;
  font-size: 0.85em;
}