/* ============================================================
   T1 · Obsidian Glass
   深色玻璃拟态 / 青蓝渐变光晕 / 细线分割 / 克制发光
   参考：Linear + starlight-theme-black(shadcn) 
   ============================================================ */

[data-theme="obsidian-glass"] {
  --c-bg: #08090a;
  --c-bg-elev: #0f1011;
  --c-surface: #15171a;
  --c-surface-2: #1c1f23;

  --c-glass: rgba(12, 13, 15, 0.68);
  --c-glass-border: rgba(255, 255, 255, 0.08);

  --c-text: #f4f6f9;
  --c-text-2: #c3c9d4;
  --c-text-3: #8a8f98;
  --c-text-4: #62666d;

  --c-accent: #7170ff;
  --c-accent-soft: rgba(113, 112, 255, 0.13);
  --c-accent-2: #22d3ee;
  --c-accent-contrast: #ffffff;

  --c-border: rgba(255, 255, 255, 0.07);
  --c-border-strong: rgba(255, 255, 255, 0.15);
  --c-hover: rgba(255, 255, 255, 0.045);

  --c-grade-a: #34d399;
  --c-grade-b: #fbbf24;
  --c-grade-c: #f87171;
  --c-warn-bg: rgba(251, 191, 36, 0.09);
  --c-warn-border: rgba(251, 191, 36, 0.28);

  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.45);
  --shadow-2: 0 10px 30px -12px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 0 1px rgba(113, 112, 255, 0.2),
    0 14px 44px -14px rgba(113, 112, 255, 0.42);

  --selection-bg: rgba(113, 112, 255, 0.28);
}

/* 光晕：内容区顶部双色径向渐变，制造"从暗处浮现"的纵深 */
[data-theme="obsidian-glass"] .content {
  background-image:
    radial-gradient(58% 38% at 82% -4%, rgba(113, 112, 255, 0.14), transparent 72%),
    radial-gradient(46% 32% at 8% -2%, rgba(34, 211, 238, 0.08), transparent 74%);
  background-repeat: no-repeat;
}

/* 条目卡左上角极细高光，模拟玻璃边缘受光 */
[data-theme="obsidian-glass"] .entry::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.14),
    rgba(255, 255, 255, 0) 38%
  );
  -webkit-mask: linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.7;
}

[data-theme="obsidian-glass"] .topbar {
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03);
}

[data-theme="obsidian-glass"] .brand-mark {
  animation: brand-breathe 6s var(--ease-in-out) infinite;
}

@keyframes brand-breathe {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(113, 112, 255, 0.34),
      0 0 18px -4px rgba(113, 112, 255, 0.5);
  }
  50% {
    box-shadow: 0 0 0 4px rgba(113, 112, 255, 0.06),
      0 0 26px -2px rgba(34, 211, 238, 0.42);
  }
}