/* PromptMine - AI Prompt Library - 现代清爽风格 */
:root {
  --bg: #0f1117;
  --card: #1a1e2a;
  --accent: #6c5ce7;
  --accent2: #a78bfa;
  --text: #e8e8ec;
  --muted: #9aa0ab;
  --border: #2a2f3e;
  --green: #2ecc71;
  --yellow: #f1c40f;
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter','Segoe UI',system-ui,-apple-system,sans-serif;
  line-height:1.7;
}
a { color:var(--accent2); text-decoration:none; }

/* ===== 导航 ===== */
.nav {
  position:sticky; top:0; z-index:100;
  backdrop-filter:blur(12px);
  background:rgba(15,17,23,.8);
  border-bottom:1px solid var(--border);
  padding:14px 24px;
  display:flex; justify-content:space-between; align-items:center;
}
.logo { font-size:1.3rem; font-weight:800; color:var(--text); }
.logo span.p { color:var(--accent); }
.nav-links a { margin-left:16px; padding:8px 14px; border-radius:8px; font-weight:600; }
.nav-links a:hover{ background:rgba(108,92,231,.15); }
.btn-nav{
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  border:none; color:#fff; padding:10px 20px; border-radius:10px;
  font-weight:700; cursor:pointer; font-size:.95rem;
}
.btn-nav:hover{ transform:translateY(-1px); box-shadow:0 4px 16px rgba(108,92,231,.4); }

/* ===== Hero ===== */
.hero{
  min-height:420px; display:flex; flex-direction:column; justify-content:center;
  align-items:center; text-align:center; padding:60px 20px;
  background:
    radial-gradient(circle at 20% 20%, rgba(108,92,231,.2), transparent 40%),
    radial-gradient(circle at 80% 30%, rgba(167,138,235,.15), transparent 45%),
    var(--bg);
}
.hero h1{ font-size:3rem; font-weight:900; max-width:800px; }
.hero h1 .grad{
  background:linear-gradient(90deg,var(--accent),var(--accent2),#64d2ff);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero p{ font-size:1.25rem; color:var(--muted); margin-top:18px; max-width:700px; }
.search{
  margin-top:30px; display:flex; gap:0; background:var(--card);
  border:1px solid var(--border); border-radius:50px; padding:4px;
  box-shadow:0 8px 30px rgba(0,0,0,.4);
}
.search input{
  border:none; background:transparent; color:var(--text);
  font-size:1.05rem; padding:14px 24px; width:340px; outline:none;
}
.search button{ border:none; background:linear-gradient(135deg,var(--accent),var(--accent2)); color:#fff; padding:12px 28px; border-radius:40px; font-weight:700; cursor:pointer; }
.stats{ display:flex; gap:24px; margin-top:26px; }
.stat-box{ text-align:center; }
.stat-box b{ display:block; font-size:1.8rem; color:var(--accent2); }
.stat-box span{ color:var(--muted); font-size:.9rem; }

/* ===== 分类 ===== */
.cats{ padding:70px 24px; }
.cats h2{ font-size:1.9rem; font-weight:800; margin-bottom:8px;}
.cats p{ color:var(--muted); }
.cat-grid{
  display:grid; gap:18px; grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
}
.cat-card{
  background:var(--card); border:1px solid var(--border); border-radius:14px;
  padding:20px; cursor:pointer; transition:.2s;
}
.cat-card:hover{ transform:translateY(-3px); border-color:var(--accent); }
.cat-card .ico{ font-size:1.8rem; }
.cat-card b{ display:block; font-size:1.05rem; margin-top:8px;}
.cat-card span{ color:var(--muted); font-size:.85rem; }

/* ===== 提示词卡片 ===== */
.prompts{ padding:70px 24px; }
.prompts h2{ font-size:1.9rem; font-weight:800; margin-bottom:20px; }
.grid{
  display:grid; gap:20px; grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
}
.card{
  background:var(--card); border:1px solid var(--border); border-radius:16px;
  padding:22px; position:relative; overflow:hidden;
}
.card .tag{
  position:absolute; top:14px; right:14px; font-size:.7rem;
  padding:4px 10px; border-radius:20px; background:rgba(108,92,231,.15);
  color:var(--accent2);
}
.card h3{ font-size:1.15rem; font-weight:700; margin-top:28px; }
.card .desc{ color:var(--muted); font-size:.92rem; margin-top:10px; }
.card pre{
  background:#12151f; border:1px solid var(--border); border-radius:8px;
  padding:12px; font-size:.8rem; white-space:pre-wrap; max-height:130px; overflow:hidden;
  font-family:'SF Mono',Consolas,monospace; color:#cdd6e0;
}
.copy-btn{
  margin-top:14px; width:100%; padding:10px; border:none; border-radius:8px;
  background:linear-gradient(135deg,var(--accent),var(--accent2)); color:#fff;
  font-weight:600; cursor:pointer;
}
.copy-btn:hover{ opacity:.9; }
.copy-btn.copied{ background:var(--green); }

/* ===== 页脚 ===== */
footer{ padding:50px 24px; text-align:center; border-top:1px solid var(--border); }
footer b{ color:var(--accent); }
footer span{ color:var(--muted); font-size:.9rem; }

/* ===== 提示词库页 ===== */
.filter-bar{ padding:30px 24px; display:flex; flex-wrap:wrap; gap:10px; }
.filter-btn{
  border:1px solid var(--border); background:transparent; color:var(--muted);
  padding:8px 16px; border-radius:30px; cursor:pointer; font-weight:600;
}
.filter-btn.active{ background:var(--accent); color:#fff; }
.library-grid{ display:grid; gap:20px; grid-template-columns:repeat(auto-fill,minmax(320px,1fr)); padding:20px 24px; }
.accordion-item{ background:var(--card); border:1px solid var(--border); border-radius:10px; padding:16px; }
.accordion-item summary{ cursor:pointer; font-weight:700; color:var(--text); }
.accordion-item .body{ margin-top:12px; }

/* ===== 响应式 ===== */
@media(max-width:720px){
  .nav-links{ display:none; }
  .hero h1{ font-size:2rem; }
  .search input{ width:180px; }
  .cat-grid,.grid,.library-grid{ grid-template-columns:1fr; }
}

/* 滚回顶部 */
.to-top{
  position:fixed; bottom:24px; right:24px; width:46px; height:46px;
  border-radius:50%; background:var(--accent); color:#fff; border:none;
  font-size:1.3rem; cursor:pointer; box-shadow:0 4px 16px rgba(108,92,231,.4);
  opacity:0; transition:.3s;
}
.to-top.show{ opacity:1; }