:root {
  --bg-deep: #020617;
  --cyan-neon: #00f3ff;
  --magenta-neon: #ff00ea;
  --glass-bg: rgba(15, 23, 42, 0.4);
  --glass-border: rgba(0, 243, 255, 0.15);
  --text-main: #f8fafc;
  --text-muted: #475569;
  --font-mono: "Fira Code", "Courier New", Courier, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg-deep);
  background-image: 
    linear-gradient(rgba(0, 243, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 243, 255, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
  color: var(--text-main);
  font-family: system-ui, -apple-system, sans-serif;
  overflow-x: hidden;
}

button, input, textarea, select { font: inherit; }
button { cursor: pointer; border: none; outline: none; }
a { color: var(--text-main); text-decoration: none; transition: 0.3s ease; }

/* ================== 全新顶部通栏导航 ================== */
.shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: rgba(2, 6, 23, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  gap: 20px;
}

.nav-left { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark {
  width: 32px; height: 32px; display: grid; place-items: center; border-radius: 8px;
  background: rgba(0, 243, 255, 0.1); color: var(--cyan-neon); border: 1px solid var(--cyan-neon);
  box-shadow: 0 0 10px rgba(0, 243, 255, 0.2); font-weight: 900; font-family: var(--font-mono); font-size: 12px;
}
.brand-text-sm { font-weight: 900; letter-spacing: 1px; color: var(--text-main); text-transform: uppercase; white-space: nowrap; }

/* ================== 居中发光搜索舱 ================== */
.nav-center { flex: 1; max-width: 600px; display: flex; justify-content: center; }
.search-wrapper {
  display: flex; flex: 1; align-items: center;
  background: rgba(0, 0, 0, 0.5); border: 1px solid var(--glass-border);
  border-radius: 8px; padding: 4px 6px 4px 12px; transition: all 0.3s ease;
}
.search-wrapper:focus-within {
  border-color: var(--cyan-neon);
  box-shadow: 0 0 20px rgba(0, 243, 255, 0.15);
  background: rgba(0, 243, 255, 0.02);
}
.search-icon { color: var(--text-muted); margin-right: 8px; }
.search-wrapper input { border: none; background: transparent; padding: 8px 0; font-size: 14px; flex: 1; min-width: 0; box-shadow: none;}
.search-wrapper input:focus { box-shadow: none; outline: none; }
.search-wrapper input::placeholder { color: var(--text-muted); }

.kbd-shortcut {
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.1); border-radius: 4px;
  padding: 2px 6px; font-family: var(--font-mono); font-size: 11px; color: var(--text-muted); margin-right: 8px; pointer-events: none;
}

.search-actions { display: flex; align-items: center; gap: 4px; }
.engine-btn {
  display: flex; align-items: center; justify-content: center; width: 30px; height: 30px;
  border-radius: 6px; background: transparent; color: var(--text-muted); transition: 0.2s; padding: 6px;
}
.engine-btn:hover { background: rgba(255, 255, 255, 0.1); transform: scale(1.1); }
.engine-btn[data-engine="google"]:hover { color: #4285F4; }
.engine-btn[data-engine="bing"]:hover { color: #0089D6; }
.engine-btn[data-engine="github"]:hover { color: #ffffff; }

.search-divider { width: 1px; height: 16px; background: var(--glass-border); margin: 0 6px; }

/* ================== 顶部导航右侧 ================== */
.nav-right { display: flex; align-items: center; gap: 12px; overflow-x: auto; scrollbar-width: none; flex-shrink: 0; }
.nav-right::-webkit-scrollbar { display: none; }

.category-list { display: flex; gap: 6px; margin: 0; padding: 0; align-items: center; }
.category {
  display: flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 6px;
  color: var(--text-muted); font-family: var(--font-mono); font-size: 12px; text-transform: uppercase;
  cursor: pointer; transition: 0.3s; white-space: nowrap;
}
.category:hover { background: rgba(0, 243, 255, 0.05); color: var(--text-main); }
.category.active { background: rgba(0, 243, 255, 0.1); color: var(--cyan-neon); font-weight: bold; }
.cat-right { display: flex; align-items: center; gap: 6px; }
.cat-right span:last-child { background: rgba(255,255,255,0.1); padding: 2px 6px; border-radius: 10px; font-size: 10px; }

.cat-actions { display: none; gap: 4px; }
.category:hover .cat-actions { display: flex; }
.cat-actions button { background: none; border: none; color: var(--text-muted); padding: 0 2px; font-size: 12px; transition: 0.2s; }
.cat-actions .delete-cat:hover { color: #ff0055; transform: scale(1.2); }
.cat-actions .edit-cat:hover { color: var(--cyan-neon); transform: scale(1.2); }

/* ================== 通用按钮 ================== */
.ghost, .primary {
  border-radius: 6px; padding: 6px 12px; font-size: 12px; font-family: var(--font-mono); text-transform: uppercase; transition: 0.2s; white-space: nowrap;
}
.ghost { border: 1px solid var(--glass-border); background: transparent; color: var(--text-muted); }
.ghost:hover { border-color: var(--cyan-neon); color: var(--cyan-neon); background: rgba(0, 243, 255, 0.05); }
.primary { background: var(--cyan-neon); color: #000; font-weight: bold; box-shadow: 0 0 10px rgba(0, 243, 255, 0.3); border: none;}
.primary:hover { background: #fff; box-shadow: 0 0 20px rgba(0, 243, 255, 0.6); }

/* ================== 主内容区域 ================== */
.main { padding: 30px 4vw; flex: 1; }
.status-pill { border: 1px solid rgba(0, 255, 136, 0.4); padding: 4px 10px; color: #00ff88; font-family: var(--font-mono); font-size: 10px; background: rgba(0, 255, 136, 0.05); border-radius: 99px; white-space: nowrap;}

.sites-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.site-card {
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 8px; padding: 20px;
  position: relative; transition: all 0.3s ease; display: flex; flex-direction: column; gap: 12px;
  background-image: linear-gradient(180deg, transparent 50%, rgba(0, 243, 255, 0.02) 50%); background-size: 100% 4px;
}
.site-card:hover { transform: translateY(-4px); border-color: var(--cyan-neon); box-shadow: 0 10px 30px rgba(0, 243, 255, 0.1); background-color: rgba(0, 243, 255, 0.03); }
.site-top { display: flex; gap: 16px; align-items: flex-start; }
.site-icon-box { width: 48px; height: 48px; background: rgba(0, 0, 0, 0.4); border: 1px solid rgba(255,255,255,0.1); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 24px; color: var(--text-main); transition: all 0.3s; }
.site-card:hover .site-icon-box { border-color: var(--cyan-neon); color: var(--cyan-neon); transform: scale(1.05); }
.site-info { flex: 1; min-width: 0; }
.site-info a { font-size: 16px; font-weight: 600; display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; letter-spacing: 0.5px; }
.site-desc { color: var(--text-muted); font-size: 12px; margin-top: 6px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;}
.site-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-top: 12px; border-top: 1px solid rgba(255, 255, 255, 0.05); }
.tags { display: flex; gap: 6px; flex-wrap: wrap; }
.tag { padding: 2px 8px; background: rgba(255,255,255,0.03); border-radius: 4px; color: var(--text-muted); font-family: var(--font-mono); font-size: 10px; }
.site-card:hover .tag { background: rgba(0, 243, 255, 0.1); color: var(--cyan-neon); }
.meta { color: var(--text-muted); font-family: var(--font-mono); font-size: 11px; }
.health-ok { color: #00ff88; }
.health-bad { color: #ff0055; }
.edit-btn { background: transparent; color: var(--text-muted); font-size: 14px; }
.edit-btn:hover { color: var(--magenta-neon); }

/* ================== HUD 弹窗 ================== */
dialog { width: min(640px, calc(100vw - 32px)); border: 1px solid var(--cyan-neon); background: rgba(2, 6, 23, 0.95); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); color: var(--text-main); box-shadow: 0 0 50px rgba(0, 243, 255, 0.15), inset 0 0 20px rgba(0, 243, 255, 0.05); padding: 0; border-radius: 12px; overflow: hidden; }
dialog::backdrop { background: rgba(0, 0, 0, 0.85); backdrop-filter: blur(8px); }
.hud-header { background: rgba(0, 243, 255, 0.05); padding: 16px 24px; border-bottom: 1px solid rgba(0, 243, 255, 0.3); display: flex; justify-content: space-between; align-items: center; }
.hud-header h2 { margin: 0; font-size: 16px; font-family: var(--font-mono); color: var(--cyan-neon); text-transform: uppercase; letter-spacing: 2px; }
.hud-body { padding: 24px; display: grid; gap: 20px; }
.danger-btn { background: rgba(255, 0, 85, 0.1); color: #ff0055; border: 1px solid #ff0055; padding: 6px 12px; border-radius: 4px; font-family: var(--font-mono); font-size: 12px; transition: 0.3s; }
.danger-btn:hover { background: #ff0055; color: #fff; box-shadow: 0 0 15px #ff0055; }
.ai-parse-box { display: flex; gap: 12px; background: rgba(0, 0, 0, 0.4); padding: 12px 16px; border-radius: 6px; border: 1px dashed var(--magenta-neon); align-items: center; }
.ai-parse-box input { border-color: transparent; background: transparent; padding: 0; margin: 0; width: 100%; box-shadow: none; font-size: 14px;}
.ai-parse-box button { white-space: nowrap; border-color: var(--magenta-neon); color: var(--magenta-neon); }
.ai-parse-box button:hover { background: var(--magenta-neon); color: #fff; box-shadow: 0 0 15px var(--magenta-neon); }
.hud-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
input, textarea, select { width: 100%; border: 1px solid var(--glass-border); border-radius: 4px; padding: 12px 16px; background: rgba(0, 0, 0, 0.5); color: var(--cyan-neon); font-family: var(--font-mono); font-size: 14px;}
input:focus, textarea:focus, select:focus { border-color: var(--cyan-neon); outline: none; background: rgba(0, 243, 255, 0.05); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 16px; margin-top: 10px; }

@media (max-width: 1024px) {
  .top-nav { flex-wrap: wrap; justify-content: center; }
  .nav-center { order: 3; min-width: 100%; }
}