/*
 * iLoveJJ 工具集 · 视觉系统
 * 设计语言：现代产品级暗色 UI（Linear / Raycast 审美）
 * - 克制的中性底色 + 细网格背景 + 柔和光晕
 * - 每张卡片拥有独立品牌色（通过 --c 变量注入），提升辨识度
 * - 明暗双主题，变量集中管理，一处修改全局生效
 */

/* ============ 主题变量 ============ */
:root {
  /* 排版 */
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1120px;
}

/* 暗色主题（默认） */
:root[data-theme="dark"] {
  --bg: #08090d;
  --bg-2: #0d0f16;
  --surface: rgba(255, 255, 255, 0.028);
  --surface-hover: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f2f4f8;
  --text-2: #b7bdcc;
  --text-3: #757d8f;
  --grid-line: rgba(255, 255, 255, 0.03);
  --brand: #7c9bff;
  --brand-2: #b58bff;
  --kbd-bg: rgba(255, 255, 255, 0.06);
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.7);
}

/* 亮色主题 */
:root[data-theme="light"] {
  --bg: #f7f8fc;
  --bg-2: #eef1f8;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-hover: #ffffff;
  --border: rgba(15, 23, 50, 0.09);
  --border-strong: rgba(15, 23, 50, 0.16);
  --text: #10131c;
  --text-2: #454c5e;
  --text-3: #838a9b;
  --grid-line: rgba(15, 23, 50, 0.035);
  --brand: #4f6bf0;
  --brand-2: #8b5cf6;
  --kbd-bg: rgba(15, 23, 50, 0.05);
  --shadow: 0 18px 40px -20px rgba(40, 60, 120, 0.25);
}

/* ============ 基础 ============ */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.3s ease;
}

a { color: inherit; text-decoration: none; }
kbd {
  font-family: var(--font);
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--kbd-bg);
  border: 1px solid var(--border);
  color: var(--text-2);
}

/* ============ 背景层 ============ */
.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; background: var(--bg); }

/* 细网格 */
.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 46px 46px;
  /* 中心清晰、四周渐隐，避免生硬 */
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 90%);
}

/* 柔和光晕 */
.bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
}
.bg-glow-1 {
  width: 620px; height: 620px;
  top: -260px; left: 50%; transform: translateX(-60%);
  background: radial-gradient(circle, var(--brand), transparent 65%);
}
.bg-glow-2 {
  width: 520px; height: 520px;
  top: -180px; left: 50%; transform: translateX(30%);
  background: radial-gradient(circle, var(--brand-2), transparent 65%);
  opacity: 0.38;
}
:root[data-theme="light"] .bg-glow { opacity: 0.28; }

/* ============ 顶部导航 ============ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { display: flex; align-items: center; }
/* 主站 logo：透明底 PNG，无需任何边框/背景衬托 */
.logo-img {
  height: 30px;
  display: block;
  transition: transform 0.2s, opacity 0.2s;
}
.logo:hover .logo-img { transform: translateY(-1px); opacity: 0.85; }

.topbar-actions { display: flex; align-items: center; gap: 10px; }

/* 语言切换按钮：与主题按钮同规格 */
.lang-toggle {
  height: 38px;
  padding: 0 13px;
  display: grid; place-items: center;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  cursor: pointer;
  font-size: 13px; font-weight: 700; letter-spacing: 0.3px;
  font-family: var(--font);
  transition: color 0.2s, border-color 0.2s, background 0.2s, transform 0.2s;
}
.lang-toggle:hover { color: var(--text); border-color: var(--border-strong); transform: translateY(-1px); }

.theme-toggle {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s, transform 0.2s;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); transform: translateY(-1px); }
.ico-moon { display: none; }
:root[data-theme="light"] .ico-sun { display: none; }
:root[data-theme="light"] .ico-moon { display: block; }

/* ============ Hero ============ */
.hero {
  max-width: 760px;
  margin: 0 auto;
  padding: 74px 24px 44px;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  margin-bottom: 22px;
}
.hero-title {
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.08;
}
.hero-title .grad {
  background: linear-gradient(100deg, var(--brand), var(--brand-2) 60%, var(--brand));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  margin: 18px auto 0;
  max-width: 460px;
  color: var(--text-2);
  font-size: 15.5px;
}
.hero-sub kbd { margin: 0 1px; }

/* 搜索框 */
.search-box {
  max-width: 520px;
  margin: 30px auto 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.search-box:focus-within {
  border-color: color-mix(in srgb, var(--brand) 60%, var(--border));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 18%, transparent);
  background: var(--surface-hover);
}
.search-icon { width: 19px; height: 19px; flex: none; stroke: var(--text-3); fill: none; stroke-width: 2; stroke-linecap: round; }
.search-box input {
  flex: 1;
  border: none; outline: none; background: transparent;
  color: var(--text); font-size: 15px; font-family: var(--font);
}
.search-box input::placeholder { color: var(--text-3); }
.search-kbd { flex: none; }

/* ============ 卡片网格 ============ */
main { max-width: var(--maxw); margin: 0 auto; padding: 8px 24px 40px; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: 16px;
}

.card {
  --c: var(--brand); /* 默认品牌色，JS 会为每张卡片注入专属色 */
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1),
    border-color 0.3s, background 0.3s, box-shadow 0.3s;
  animation: card-in 0.55s both;
}
@keyframes card-in {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 悬停：品牌色边框 + 上浮 + 阴影 */
.card:hover {
  transform: translateY(-4px);
  background: var(--surface-hover);
  border-color: color-mix(in srgb, var(--c) 55%, var(--border));
  box-shadow: var(--shadow), 0 0 0 1px color-mix(in srgb, var(--c) 30%, transparent);
}

/* ---- 长方形横幅图标区 ---- */
.card-banner {
  position: relative;
  height: 96px;
  display: grid;
  place-items: center;
  overflow: hidden;
  /* 品牌色斜向渐变 + 右上高光，营造层次 */
  background:
    radial-gradient(120% 90% at 82% -20%, rgba(255, 255, 255, 0.42), transparent 55%),
    linear-gradient(135deg,
      color-mix(in srgb, var(--c) 92%, #fff 8%),
      color-mix(in srgb, var(--c) 62%, #10121c 38%));
}
/* 装饰点阵，丰富纹理 */
.card-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.4) 1px, transparent 1.4px);
  background-size: 13px 13px;
  opacity: 0.35;
  -webkit-mask-image: linear-gradient(115deg, #000, transparent 70%);
  mask-image: linear-gradient(115deg, #000, transparent 70%);
}
/* 装饰同心圆环，增添几何细节 */
.card-banner::before {
  content: "";
  position: absolute;
  top: -60px; right: -40px;
  width: 150px; height: 150px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.22);
  box-shadow: 0 0 0 22px rgba(255, 255, 255, 0.07);
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.card:hover .card-banner::before { transform: scale(1.15) translate(-6px, 6px); }

/* 横幅内的线性图标（白色，带投影） */
.banner-icon {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  color: #fff;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.28));
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.banner-icon svg { width: 40px; height: 40px; stroke-width: 1.7; }
.card:hover .banner-icon { transform: scale(1.12) translateY(-2px); }

/* 主站横幅：浅色底承托透明 logo */
.card-banner.is-logo {
  background:
    radial-gradient(120% 90% at 82% -20%, color-mix(in srgb, var(--c) 22%, transparent), transparent 55%),
    linear-gradient(135deg,
      color-mix(in srgb, var(--c) 10%, var(--surface-hover)),
      color-mix(in srgb, var(--c) 22%, var(--surface-hover)));
}
.card-banner.is-logo::after { opacity: 0.5; background-image: radial-gradient(color-mix(in srgb, var(--c) 45%, transparent) 1px, transparent 1.4px); }
.card-banner.is-logo::before { border-color: color-mix(in srgb, var(--c) 30%, transparent); box-shadow: 0 0 0 22px color-mix(in srgb, var(--c) 8%, transparent); }
.banner-logo {
  position: relative;
  z-index: 1;
  height: 34px;
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.card:hover .banner-logo { transform: scale(1.06) translateY(-2px); }

/* ---- 卡片正文 ---- */
.card-content { padding: 18px 20px 18px; display: flex; flex-direction: column; flex: 1; }
.card-body { flex: 1; }
.card-title { font-size: 16px; font-weight: 700; letter-spacing: -0.2px; }
.card-desc { margin-top: 7px; font-size: 13px; color: var(--text-2); line-height: 1.6; }

/* 底部：域名 + 箭头 */
.card-foot {
  margin-top: 16px;
  display: flex; align-items: center; justify-content: space-between;
}
.card-domain {
  font-size: 12px; font-weight: 600;
  color: var(--text-3);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  transition: color 0.3s;
}
.card:hover .card-domain { color: color-mix(in srgb, var(--c) 80%, var(--text)); }
.card-arrow {
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border-radius: 8px;
  color: var(--text-3);
  transition: transform 0.3s, color 0.3s, background 0.3s;
}
.card:hover .card-arrow {
  color: var(--c);
  background: color-mix(in srgb, var(--c) 14%, transparent);
  transform: translate(2px, -2px);
}
.card-arrow svg { width: 15px; height: 15px; }

/* 主站徽标：置于横幅右上，玻璃质感 */
.card-badge {
  position: absolute;
  top: 12px; right: 12px;
  z-index: 2;
  font-size: 10.5px; font-weight: 700; letter-spacing: 0.4px;
  padding: 3px 9px;
  border-radius: 999px;
  color: #fff;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(4px);
}
.card-banner.is-logo .card-badge {
  color: var(--c);
  background: color-mix(in srgb, var(--c) 14%, var(--surface-hover));
  border-color: color-mix(in srgb, var(--c) 30%, transparent);
}

/* ============ 空状态 ============ */
.empty-state {
  text-align: center;
  color: var(--text-2);
  padding: 70px 0;
  font-size: 15px;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.empty-emoji { font-size: 34px; opacity: 0.7; }
/* 修复：display:flex 会覆盖 hidden 默认样式，需显式隐藏 */
.empty-state[hidden] { display: none; }

/* ============ 页脚 ============ */
.site-footer { text-align: center; padding: 40px 24px 48px; color: var(--text-3); }
.footer-line { font-size: 13.5px; display: inline-flex; align-items: center; gap: 8px; }
.footer-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 3px color-mix(in srgb, #34d399 22%, transparent);
}
.heart { color: #ff5d7e; }
.icp { margin-top: 10px; font-size: 12px; }
.icp a { color: var(--text-3); transition: color 0.2s; }
.icp a:hover { color: var(--brand); }

/* ============ 响应式 ============ */
@media (max-width: 640px) {
  .hero { padding: 52px 20px 34px; }
  main { padding: 8px 16px 32px; }
  .card-grid { grid-template-columns: 1fr; gap: 14px; }
}

/* 尊重用户的减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}