/* ============================================================
 * Kondius Blog — Aurora Glass Theme (vanilla, no framework)
 * 清新磨砂玻璃 · 渐变 · 浮动 · 亮暗自由切换
 * 本文件是整站唯一共享样式：主题 token / 玻璃 / 极光 /
 * 动效 / 排版 / 导航 / 编辑器 / 一套轻量布局工具类。
 * 想改配色？调下面 --grad-* / --aurora-* / --glass-* 即可。
 * ============================================================ */

/* ── 共享 token ─────────────────────────────── */
:root {
  --radius: 0.85rem;

  --font-display: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Geist Mono", "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* 渐变调色板（与模式无关的色相） */
  --grad-c1: oklch(0.72 0.16 210);   /* cyan */
  --grad-c2: oklch(0.68 0.19 280);   /* violet */
  --grad-c3: oklch(0.75 0.17 330);   /* pink */
  --grad-c4: oklch(0.78 0.15 50);    /* warm */

  /* 极光光斑颜色 */
  --aurora-1: oklch(0.78 0.15 210);
  --aurora-2: oklch(0.80 0.16 300);
  --aurora-3: oklch(0.85 0.14 30);
  --aurora-4: oklch(0.82 0.15 160);

  --radius-none: 0px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-card: 14px;
  --radius-lg: 18px;
  --radius-module: 26px;
  --radius-pill: 9999px;
}

/* ── 清新亮色（默认） ───────────────────────────── */
html.light {
  --background: oklch(0.975 0.012 280);
  --foreground: oklch(0.28 0.03 280);

  --card: rgba(255, 255, 255, 0.62);
  --card-foreground: oklch(0.28 0.03 280);
  --popover: rgba(255, 255, 255, 0.85);
  --popover-foreground: oklch(0.28 0.03 280);

  --primary: oklch(0.62 0.18 264);
  --primary-foreground: oklch(0.99 0.005 280);
  --secondary: rgba(255, 255, 255, 0.55);
  --secondary-foreground: oklch(0.32 0.03 280);
  --muted: rgba(255, 255, 255, 0.5);
  --muted-foreground: oklch(0.5 0.025 280);
  --accent: oklch(0.72 0.17 25);
  --accent-foreground: oklch(0.99 0.01 60);
  --destructive: oklch(0.6 0.21 25);
  --destructive-foreground: oklch(0.99 0.005 280);
  --border: rgba(40, 40, 80, 0.12);
  --input: rgba(40, 40, 80, 0.16);
  --ring: oklch(0.62 0.18 264);

  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bg-strong: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.7);
  --glass-shadow: 0 8px 32px rgba(70, 80, 160, 0.14);
  --glass-shadow-lg: 0 18px 60px rgba(70, 80, 160, 0.22);

  --color-text-display: oklch(0.32 0.04 280);
  --color-text-body: oklch(0.42 0.03 280);
  --color-text-muted: oklch(0.52 0.025 280);
  --color-text-subtle: oklch(0.62 0.02 280);
  --color-accent-primary: oklch(0.66 0.18 25);
  --color-accent-hover: oklch(0.72 0.2 25);
  --color-border-subtle: rgba(40, 40, 80, 0.07);
  --color-border-hairline: rgba(40, 40, 80, 0.12);
  --color-border-strong: rgba(40, 40, 80, 0.22);
  --color-border-dashed: rgba(40, 40, 80, 0.32);
  --color-surface-floor: rgba(255, 255, 255, 0.5);
  --color-surface-floor-alt: rgba(245, 246, 255, 0.8);

  --aurora-opacity: 0.55;
}

/* ── 深空暗色 ──────────────────────────────────── */
html.dark {
  --background: oklch(0.16 0.025 280);
  --foreground: oklch(0.92 0.01 280);

  --card: rgba(28, 30, 55, 0.5);
  --card-foreground: oklch(0.92 0.01 280);
  --popover: rgba(28, 30, 55, 0.85);
  --popover-foreground: oklch(0.92 0.01 280);

  --primary: oklch(0.7 0.16 264);
  --primary-foreground: oklch(0.16 0.025 280);
  --secondary: rgba(255, 255, 255, 0.06);
  --secondary-foreground: oklch(0.92 0.01 280);
  --muted: rgba(255, 255, 255, 0.06);
  --muted-foreground: oklch(0.68 0.02 280);
  --accent: oklch(0.78 0.16 30);
  --accent-foreground: oklch(0.16 0.025 280);
  --destructive: oklch(0.62 0.2 25);
  --destructive-foreground: oklch(0.98 0.005 280);
  --border: rgba(255, 255, 255, 0.1);
  --input: rgba(255, 255, 255, 0.14);
  --ring: oklch(0.7 0.16 264);

  --glass-bg: rgba(22, 24, 48, 0.42);
  --glass-bg-strong: rgba(22, 24, 48, 0.6);
  --glass-border: rgba(255, 255, 255, 0.14);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.36);
  --glass-shadow-lg: 0 18px 60px rgba(0, 0, 0, 0.5);

  --color-text-display: oklch(0.96 0.008 280);
  --color-text-body: oklch(0.82 0.012 280);
  --color-text-muted: oklch(0.68 0.015 280);
  --color-text-subtle: oklch(0.5 0.015 280);
  --color-accent-primary: oklch(0.78 0.16 30);
  --color-accent-hover: oklch(0.84 0.17 30);
  --color-border-subtle: rgba(255, 255, 255, 0.05);
  --color-border-hairline: rgba(255, 255, 255, 0.1);
  --color-border-strong: rgba(255, 255, 255, 0.2);
  --color-border-dashed: rgba(255, 255, 255, 0.3);
  --color-pinstripe: rgba(255, 255, 255, 0.05);
  --color-surface-floor: rgba(255, 255, 255, 0.05);
  --color-surface-floor-alt: rgba(255, 255, 255, 0.08);

  --aurora-opacity: 0.7;
}

/* ── 基础 ─────────────────────────────────────── */
* { box-sizing: border-box; border-color: var(--color-border); }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.5s ease, color 0.5s ease;
}
a { transition: color 0.2s ease; color: var(--primary); text-decoration: none; }
a:hover { color: var(--color-accent-primary); }
::selection { background: color-mix(in oklch, var(--primary) 35%, transparent); color: var(--color-text-display); }
img { max-width: 100%; }

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: color-mix(in oklch, var(--primary) 40%, var(--color-border-strong));
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ── 排版工具类 ───────────────────────────────── */
.display-1 { font-family: var(--font-display); font-size: clamp(32px, 4vw, 56px); font-weight: 700; line-height: 1.0; letter-spacing: -0.025em; color: var(--color-text-display); }
.display-2 { font-family: var(--font-display); font-size: clamp(24px, 3vw, 40px); font-weight: 700; line-height: 1.05; letter-spacing: -0.02em; color: var(--color-text-display); }
.heading-card { font-family: var(--font-display); font-size: 20px; font-weight: 600; line-height: 1.25; letter-spacing: -0.01em; color: var(--color-text-display); }
.eyebrow { font-family: var(--font-sans); font-size: 11px; font-weight: 500; line-height: 1.2; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-text-muted); }
.body-mono { font-family: var(--font-sans); font-size: 14px; font-weight: 400; line-height: 1.7; color: var(--color-text-body); }
.body-mono-sm { font-family: var(--font-sans); font-size: 13px; font-weight: 400; line-height: 1.6; color: var(--color-text-body); }
.caption-mono { font-family: var(--font-sans); font-size: 11px; font-weight: 400; line-height: 1.4; letter-spacing: 0.02em; color: var(--color-text-muted); }
.label-mono { font-family: var(--font-sans); font-size: 11px; font-weight: 600; line-height: 1.0; letter-spacing: 0.06em; text-transform: uppercase; }

/* ── 玻璃拟态 ─────────────────────────────────── */
.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: background 0.5s ease, border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}
.glass-strong {
  background: var(--glass-bg-strong);
  -webkit-backdrop-filter: blur(22px) saturate(180%);
  backdrop-filter: blur(22px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow-lg);
  transition: background 0.5s ease, border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}
.glass-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--glass-shadow-lg);
  border-color: color-mix(in oklch, var(--primary) 45%, var(--glass-border));
}
.glass-float {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  animation: float 6s ease-in-out infinite;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.glass-float-slow { animation: float 9s ease-in-out infinite; }
.glass-float:hover {
  box-shadow: var(--glass-shadow-lg);
  border-color: color-mix(in oklch, var(--primary) 45%, var(--glass-border));
}

/* ── 渐变助手 ─────────────────────────────────── */
.gradient-text {
  background: linear-gradient(115deg, var(--grad-c1), var(--grad-c2) 45%, var(--grad-c3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.gradient-soft {
  background: linear-gradient(135deg, color-mix(in oklch, var(--primary) 16%, transparent), color-mix(in oklch, var(--accent) 16%, transparent));
}
.gradient-brand { background: linear-gradient(115deg, var(--grad-c1), var(--grad-c2) 50%, var(--grad-c3)); }
.gradient-border { position: relative; }
.gradient-border::before {
  content: ""; position: absolute; inset: 0; padding: 1px; border-radius: inherit;
  background: linear-gradient(120deg, var(--grad-c1), var(--grad-c2), var(--grad-c3));
  -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;
}
.glow { box-shadow: 0 0 24px color-mix(in oklch, var(--primary) 35%, transparent); }
.glow-accent { box-shadow: 0 0 24px color-mix(in oklch, var(--accent) 35%, transparent); }

/* ── 标签 chip ────────────────────────────────── */
.chip-label {
  font-family: var(--font-sans); font-size: 11px; font-weight: 500; letter-spacing: 0.03em;
  color: var(--color-text-muted);
  background: color-mix(in oklch, var(--primary) 12%, transparent);
  border: 1px solid color-mix(in oklch, var(--primary) 18%, transparent);
  border-radius: var(--radius-pill); padding: 2px 10px; display: inline-flex; align-items: center;
}
.chip-accent {
  color: var(--color-accent-primary);
  background: color-mix(in oklch, var(--accent) 14%, transparent);
  border-color: color-mix(in oklch, var(--accent) 22%, transparent);
}

/* ── 浮动 / 入场动画 ───────────────────────────── */
.float { animation: float 6s ease-in-out infinite; }
.float-slow { animation: float 9s ease-in-out infinite; }
.float-delay-1 { animation-delay: -1.5s; }
.float-delay-2 { animation-delay: -3s; }
.float-delay-3 { animation-delay: -4.5s; }
.animate-pop-in { animation: pop-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) both; }
.animate-fade-in { animation: fade-in 0.3s ease-out forwards; }
.animate-slide-in-right { animation: slide-in-right 0.3s ease-out forwards; }

.btn-gradient {
  background: linear-gradient(115deg, var(--grad-c1), var(--grad-c2) 55%, var(--grad-c3));
  color: #fff; border: none;
  box-shadow: 0 6px 20px color-mix(in oklch, var(--primary) 35%, transparent);
  transition: transform 0.2s ease, box-shadow 0.3s ease, filter 0.3s ease;
}
.btn-gradient:hover { transform: translateY(-2px); filter: brightness(1.05); box-shadow: 0 10px 28px color-mix(in oklch, var(--primary) 45%, transparent); }

/* ── 极光背景层（fixed，内容之后，页面底色之上） ── */
.aurora-bg { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.aurora-blob { position: absolute; border-radius: 50%; filter: blur(70px); opacity: var(--aurora-opacity); will-change: transform; pointer-events: none; }
.aurora-blob.b1 { background: var(--aurora-1); animation: aurora-drift-a 20s ease-in-out infinite; }
.aurora-blob.b2 { background: var(--aurora-2); animation: aurora-drift-b 24s ease-in-out infinite; }
.aurora-blob.b3 { background: var(--aurora-3); animation: aurora-drift-c 28s ease-in-out infinite; }
.aurora-blob.b4 { background: var(--aurora-4); animation: aurora-drift-a 32s ease-in-out infinite reverse; }

/* ── 全局动效画布（鼠标拖尾 + 点击迸发） ──────── */
.effects-canvas { position: fixed; inset: 0; z-index: 60; pointer-events: none; }

/* ── 内容层：所有页面内容都包在 .page 里，恒定在极光之上 ── */
.page { position: relative; z-index: 10; }

/* ── 导航栏 ───────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid var(--color-border-hairline);
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; height: 56px;
  display: flex; align-items: center; justify-content: space-between; padding: 0 24px;
}
.nav-logo { display: flex; align-items: center; gap: 8px; }
.nav-logo .logo-box {
  width: 28px; height: 28px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 13px; box-shadow: 0 4px 12px rgba(70,80,160,0.3);
}
.nav-logo .logo-text { font-family: var(--font-display); font-size: 18px; font-weight: 600; letter-spacing: -0.01em; color: var(--color-text-display); }
.nav-links { display: none; align-items: center; gap: 4px; }
.nav-links a, .nav-links button {
  font-family: var(--font-sans); font-size: 11px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 6px;
  border-radius: 8px; padding: 7px 12px; color: var(--color-text-muted);
  background: transparent; border: none; cursor: pointer; text-decoration: none;
  transition: all 0.2s ease;
}
.nav-links a:hover, .nav-links button:hover { color: var(--color-text-display); }
.nav-links a.active { background: var(--glass-bg); color: var(--color-accent-primary); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.theme-toggle {
  width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  color: var(--color-text-body); cursor: pointer; border: none; background: var(--glass-bg);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  transition: transform 0.2s ease;
}
.theme-toggle:hover { transform: scale(1.1); }
.nav-user { display: none; align-items: center; gap: 12px; }
.nav-user .uname { font-family: var(--font-sans); font-size: 13px; color: var(--color-text-body); }
.nav-auth { display: none; align-items: center; gap: 8px; }
.nav-auth a { font-family: var(--font-sans); font-size: 11px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; padding: 7px 12px; border-radius: 8px; }
.nav-auth a.login { color: var(--color-text-muted); }
.nav-auth a.login:hover { color: var(--color-text-display); }
.nav-auth a.register { color: #fff; }
.nav-toggle { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border: none; background: transparent; color: var(--color-text-muted); cursor: pointer; }
.nav-mobile { display: none; flex-direction: column; gap: 4px; padding: 16px 24px; border-top: 1px solid var(--color-border-hairline); background: var(--background); }
.nav-mobile.open { display: flex; }
.nav-mobile a, .nav-mobile button {
  font-family: var(--font-sans); font-size: 13px; font-weight: 600; letter-spacing: 0.04em;
  display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-radius: 8px;
  color: var(--color-text-muted); background: transparent; border: none; cursor: pointer; text-decoration: none; text-align: left;
}
.nav-mobile a.active { background: var(--glass-bg); color: var(--color-accent-primary); }
.nav-mobile a.register { color: #fff; justify-content: center; margin-top: 4px; }

/* ── 轻量布局工具类（替代 Tailwind，纯原生） ──── */
.container { max-width: 1080px; margin: 0 auto; padding: 32px 24px; }
.container-wide { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.wrap { flex-wrap: wrap; }
.gap-1 { gap: 4px; } .gap-2 { gap: 8px; } .gap-3 { gap: 12px; } .gap-4 { gap: 16px; } .gap-5 { gap: 20px; } .gap-6 { gap: 24px; }
.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.w-full { width: 100%; }
.text-center { text-align: center; }
.mt-1 { margin-top: 4px; } .mt-2 { margin-top: 8px; } .mt-3 { margin-top: 12px; } .mt-4 { margin-top: 16px; } .mt-6 { margin-top: 24px; } .mt-8 { margin-top: 32px; } .mt-12 { margin-top: 48px; }
.mb-1 { margin-bottom: 4px; } .mb-2 { margin-bottom: 8px; } .mb-3 { margin-bottom: 12px; } .mb-4 { margin-bottom: 16px; } .mb-6 { margin-bottom: 24px; } .mb-8 { margin-bottom: 32px; } .mb-10 { margin-bottom: 40px; } .mb-12 { margin-bottom: 48px; }
.p-3 { padding: 12px; } .p-4 { padding: 16px; } .p-5 { padding: 20px; } .p-6 { padding: 24px; }
.px-3 { padding-left: 12px; padding-right: 12px; }
.py-2 { padding-top: 8px; padding-bottom: 8px; }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-card); }
.rounded-2xl { border-radius: var(--radius-module); }
.rounded-full { border-radius: var(--radius-pill); }
.hidden { display: none; }
.shrink-0 { flex-shrink: 0; }
.relative { position: relative; }
.ring-accent { box-shadow: 0 0 0 2px var(--color-accent-primary); }

/* 按钮 */
.btn {
  font-family: var(--font-sans); font-size: 13px; font-weight: 600; letter-spacing: 0.04em;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border-radius: 10px; padding: 10px 18px; cursor: pointer; border: 1px solid var(--color-border-hairline);
  color: var(--color-text-body); background: var(--card); transition: all 0.2s ease; text-decoration: none;
}
.btn:hover { color: var(--color-text-display); border-color: var(--color-border-strong); }
.btn-primary { background: var(--primary); color: var(--primary-foreground); border: none; }
.btn-primary:hover { opacity: 0.92; color: var(--primary-foreground); }
.btn-danger { color: var(--destructive); }
.btn-ghost { background: transparent; color: var(--color-text-muted); }
.btn-ghost:hover { color: var(--color-text-display); background: var(--glass-bg); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* 标签多选切换 */
.tag-toggle {
  font-family: var(--font-sans); font-size: 12px; font-weight: 600; letter-spacing: 0.03em;
  padding: 5px 12px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--color-border-hairline); background: transparent; color: var(--color-text-muted);
  transition: all 0.18s ease;
}
.tag-toggle:hover { color: var(--color-text-body); border-color: var(--color-border-strong); }
.tag-toggle.active {
  background: color-mix(in oklch, var(--primary) 16%, transparent);
  border-color: var(--primary); color: var(--primary);
}

/* 表单 */
.input, .select, .textarea {
  font-family: var(--font-sans); font-size: 14px; width: 100%;
  border-radius: 10px; border: 1px solid var(--color-border-hairline);
  background: var(--card); color: var(--foreground);
  padding: 10px 12px; transition: border-color 0.2s ease;
}
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--primary); }
.input::placeholder, .textarea::placeholder { color: var(--color-text-subtle); }
.textarea { resize: vertical; min-height: 90px; }

/* 头像 */
.avatar {
  width: 28px; height: 28px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;
  background: var(--secondary); color: var(--color-text-muted); font-size: 11px; font-weight: 600; overflow: hidden;
}
.avatar.lg { width: 80px; height: 80px; font-size: 28px; }

/* 卡片 */
.card { border-radius: var(--radius-card); padding: 20px; }

/* 标签选择按钮（写文章页） */
.tag-btn {
  font-family: var(--font-sans); font-size: 11px; font-weight: 500; letter-spacing: 0.03em;
  border-radius: var(--radius-pill); padding: 4px 10px; cursor: pointer;
  color: var(--color-text-muted); background: var(--card); border: 1px solid var(--color-border-hairline);
  transition: all 0.1s ease;
}
.tag-btn.active { color: var(--primary-foreground); background: var(--primary); border-color: var(--primary); }

/* ── Markdown 正文 ─────────────────────────────── */
.markdown-content h1 { font-family: var(--font-display); font-size: 32px; font-weight: 700; line-height: 1.1; margin: 32px 0 16px; color: var(--color-text-display); }
.markdown-content h2 { font-family: var(--font-display); font-size: 24px; font-weight: 600; line-height: 1.15; margin: 28px 0 12px; color: var(--color-text-display); }
.markdown-content h3 { font-family: var(--font-display); font-size: 20px; font-weight: 600; line-height: 1.2; margin: 24px 0 10px; color: var(--color-text-display); }
.markdown-content p { margin: 12px 0; line-height: 1.8; color: var(--color-text-body); }
.markdown-content ul, .markdown-content ol { margin: 12px 0; padding-left: 24px; color: var(--color-text-body); }
.markdown-content li { margin: 4px 0; line-height: 1.75; }
.markdown-content code { font-family: var(--font-mono); font-size: 13px; background: var(--color-surface-floor-alt); padding: 2px 6px; border-radius: var(--radius-sm); }
.markdown-content pre { background: var(--color-surface-floor-alt); border: 1px solid var(--color-border-hairline); border-radius: var(--radius-card); padding: 16px; overflow-x: auto; margin: 16px 0; }
.markdown-content pre code { background: none; padding: 0; }
.markdown-content blockquote { border-left: 3px solid var(--color-accent-primary); padding-left: 16px; margin: 16px 0; color: var(--color-text-muted); font-style: italic; }
.markdown-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.markdown-content a:hover { color: var(--color-accent-primary); }
.markdown-content img { max-width: 100%; border-radius: var(--radius-card); margin: 16px 0; }
.markdown-content hr { border: none; border-top: 1px solid var(--color-border-hairline); margin: 32px 0; }

/* ── WYSIWYG 编辑器 ───────────────────────────── */
.wysiwyg {
  min-height: 360px; padding: 20px 24px; outline: none;
  font-family: var(--font-sans); font-size: 15px; line-height: 1.8; color: var(--color-text-body); cursor: text;
}
.wysiwyg:empty::before { content: attr(data-placeholder); color: var(--color-text-subtle); pointer-events: none; }
.wysiwyg:focus { outline: none; }
.wysiwyg > :first-child { margin-top: 0; }
.wysiwyg a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.wysiwyg img { max-width: 100%; border-radius: var(--radius-card); }
.wysiwyg ::selection { background: color-mix(in oklch, var(--primary) 30%, transparent); }

.editor-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; padding: 8px 10px; border-bottom: 1px solid var(--color-border-hairline); }
.editor-toolbar button {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 8px; border: none; background: transparent;
  color: var(--color-text-muted); cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.editor-toolbar button:hover { background: color-mix(in oklch, var(--primary) 14%, transparent); color: var(--primary); transform: translateY(-1px); }
.editor-toolbar .tb-sep,
.editor-toolbar span[data-sep] { width: 1px; height: 20px; margin: 0 4px; background: var(--color-border-hairline); display: inline-block; }
.editor-toolbar .tb-mode { margin-left: auto; display: inline-flex; align-items: center; gap: 4px; padding: 0 8px; font-size: 12px; font-weight: 500; }

/* ── 响应式 ───────────────────────────────────── */
/* ── Tailwind 工具类补全（补齐 HTML 使用但原文件缺失的工具类） ── */
.flex-1 { flex: 1 1 0%; }
.flex-wrap { flex-wrap: wrap; }
.items-end { align-items: flex-end; }
.items-start { align-items: flex-start; }

.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }

.mb-1\.5 { margin-bottom: 0.375rem; }
.mb-5 { margin-bottom: 1.25rem; }
.mb-7 { margin-bottom: 1.75rem; }
.mt-5 { margin-top: 1.25rem; }
.pt-8 { padding-top: 2rem; }
.p-7 { padding: 1.75rem; }
.p-8 { padding: 2rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.py-0\.5 { padding-top: 0.125rem; padding-bottom: 0.125rem; }
.py-20 { padding-top: 5rem; padding-bottom: 5rem; }
.py-24 { padding-top: 6rem; padding-bottom: 6rem; }
.gap-1\.5 { gap: 0.375rem; }

.h-1\.5 { height: 0.375rem; }
.w-1\.5 { width: 0.375rem; }

.rounded { border-radius: 0.25rem; }

.tab-btn {
  display: inline-flex; align-items: center; cursor: pointer;
  border: 1px solid var(--color-border-hairline);
  background: transparent; color: var(--color-text-muted);
  transition: all 0.18s ease;
}
.tab-btn:hover { color: var(--color-text-body); border-color: var(--color-border-strong); }

.wysiwyg-source {
  width: 100%; min-height: 360px; padding: 20px 24px;
  border: none; outline: none; resize: vertical;
  font-family: var(--font-mono); font-size: 14px; line-height: 1.7;
  color: var(--color-text-body); background: transparent;
}

@media (min-width: 768px) {
  .nav-links { display: flex; }
  .nav-user { display: flex; }
  .nav-auth { display: flex; }
  .nav-toggle { display: none; }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .md-hidden { display: none; }
  .md\:flex-row { flex-direction: row; }
  .md\:items-center { align-items: center; }
  .md\:p-9 { padding: 36px; }
}
@media (max-width: 767px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}