/* lonloop.com — 雷达 (Radar) styles.
   Design tokens mirror the home page / collection for visual continuity. */
:root{
  --bg:#0b0d12; --bg2:#11141b; --card:#151924; --line:#222838;
  --txt:#e7eaf0; --muted:#9aa3b2; --dim:#808999;
  --accent:#7c9cff; --accent2:#5be0c8; --chip:#1b2130;
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:radial-gradient(1200px 600px at 80% -10%, #1a2030 0%, var(--bg) 55%) no-repeat, var(--bg);
  color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  line-height:1.65; -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
}

/* top nav */
.topnav{max-width:880px;margin:0 auto;padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.topnav .brand{font-weight:800;font-size:20px;letter-spacing:-.02em;text-decoration:none;color:var(--txt)}
.topnav .brand .dot{color:var(--accent)}
.topnav .tabs{display:flex;gap:6px}
.topnav .tab{text-decoration:none;color:var(--muted);font-weight:600;font-size:15px;padding:7px 14px;border-radius:999px;transition:color .15s ease,background .15s ease}
.topnav .tab:hover{color:var(--txt)}
.topnav .tab[aria-current="page"]{color:var(--accent);background:var(--chip)}

/* page shell */
.radar{max-width:880px;margin:0 auto;padding:40px 24px 96px}
.page-head{margin-bottom:30px}
.page-head .eyebrow{color:var(--accent2);font-weight:600;letter-spacing:.14em;text-transform:uppercase;font-size:13px}
.page-head h1{font-size:clamp(30px,6vw,44px);letter-spacing:-.02em;margin:10px 0 12px;font-weight:800}
.page-head p{color:var(--muted);font-size:16px;max-width:640px}

/* controls */
.controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  margin-bottom:14px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.filters{display:flex;flex-wrap:wrap;gap:8px}
.filter{font:inherit;cursor:pointer;background:var(--chip);border:1px solid var(--line);color:var(--muted);
  font-size:13.5px;font-weight:600;padding:7px 14px;border-radius:999px;
  transition:color .15s ease,border-color .15s ease,background .15s ease}
.filter:hover{color:var(--txt);border-color:#33405e}
.filter[aria-pressed="true"]{color:var(--accent);border-color:rgba(124,156,255,.45);background:rgba(124,156,255,.12)}
.search{position:relative;flex:0 1 220px}
.search input{width:100%;font:inherit;font-size:14px;color:var(--txt);
  background:var(--bg2);border:1px solid var(--line);border-radius:999px;
  padding:9px 15px;transition:border-color .15s ease}
.search input::placeholder{color:var(--dim)}
.search input:focus{outline:none;border-color:var(--accent)}
.count{color:var(--dim);font-size:13px;margin-bottom:22px}

/* cards */
.rd-list{display:flex;flex-direction:column;gap:16px}
.rd-card{display:block;text-decoration:none;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 24px;transition:transform .15s ease,border-color .15s ease}
.rd-card:hover{transform:translateY(-3px);border-color:#33405e}
.rd-card[hidden]{display:none}
.rd-meta{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center;color:var(--dim);font-size:12.5px;margin-bottom:11px}
.rd-meta .src{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.badge{font-size:11px;font-weight:700;letter-spacing:.04em;padding:3px 8px;border-radius:999px;
  background:rgba(124,156,255,.12);color:var(--accent);border:1px solid rgba(124,156,255,.25)}
.rd-card h2{font-size:19px;font-weight:700;color:var(--txt);line-height:1.35;margin-bottom:8px;
  display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.rd-card h2 .out{color:var(--dim);font-size:14px;font-weight:600;transition:color .15s ease}
.rd-card:hover h2 .out{color:var(--accent)}
.rd-card .excerpt{color:var(--muted);font-size:14.5px;line-height:1.62}
.rd-card code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;
  background:var(--chip);border:1px solid var(--line);border-radius:5px;padding:1px 5px;color:var(--txt)}
.rd-card .why{color:var(--dim);font-size:13.5px;line-height:1.6;margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.rd-card .why b{color:var(--accent2);font-weight:600}

/* empty state */
.empty{color:var(--dim);font-size:15px;text-align:center;padding:56px 24px;
  border:1px dashed var(--line);border-radius:var(--radius)}
.empty[hidden]{display:none}

/* footer */
.site-foot{max-width:880px;margin:0 auto;padding:26px 24px 40px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;color:var(--dim);font-size:13.5px}
.site-foot a{color:var(--muted);text-decoration:none}
.site-foot a:hover{color:var(--accent)}

@media(max-width:560px){
  .controls{align-items:stretch}
  .search{flex:1 1 100%}
}