/* Shared styles for the content pages (about, contact, privacy, terms).
   The homepage keeps its own inline critical CSS because it is the LCP entry
   point; these pages are secondary, so one cached stylesheet is the better
   trade-off than duplicating the base rules four times.
   Theme tokens mirror the homepage so both stay visually identical. */
:root{
  --v:#6d5dfc; --b:#4f9dfd;
  --grad:linear-gradient(135deg,#6d5dfc 0%,#4f9dfd 100%); --r:16px;

  --bg:#0f1115;
  --text:#e9ecf3;
  --muted:#9aa3b5;
  --heading:linear-gradient(120deg,#fff 20%,#b9c8ff 70%);
  --card:rgba(255,255,255,.045);
  --stroke:rgba(255,255,255,.10);
  --nav-bg:rgba(15,17,21,.72);
  --btn:rgba(255,255,255,.05);
  --btn-hover:rgba(255,255,255,.09);
  --body-text:#cdd4e2;
  --lead-text:#dfe5f1;
  --link:#a9c6ff;
  --code-bg:rgba(109,93,252,.16);
  --code-br:rgba(109,93,252,.3);
  --code-fg:#c9d4ff;
  --glow-1:rgba(109,93,252,.24);
  --glow-2:rgba(79,157,253,.16);
  --card-shadow:none;
}
:root[data-theme="light"]{
  --bg:#f7f8fc;
  --text:#171a23;
  --muted:#5a6478;
  --heading:linear-gradient(120deg,#141824 10%,#3a34c0 75%);
  --card:rgba(255,255,255,.78);
  --stroke:rgba(16,20,32,.11);
  --nav-bg:rgba(247,248,252,.78);
  --btn:#ffffff;
  --btn-hover:#eef1f9;
  --body-text:#39415a;
  --lead-text:#232838;
  --link:#3f5fd0;
  --code-bg:rgba(109,93,252,.10);
  --code-br:rgba(109,93,252,.25);
  --code-fg:#4a3fd0;
  --glow-1:rgba(109,93,252,.16);
  --glow-2:rgba(79,157,253,.14);
  --card-shadow:0 10px 30px -22px rgba(23,26,35,.45);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;
  transition:background-color .28s ease,color .28s ease;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(700px 420px at 12% -6%,var(--glow-1),transparent 60%),
    radial-gradient(700px 420px at 92% 4%,var(--glow-2),transparent 62%);
}
.wrap{width:100%;max-width:780px;margin:0 auto;padding:0 20px}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--b);outline-offset:3px;border-radius:8px}

.nav{
  position:sticky;top:0;z-index:50;background:var(--nav-bg);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--stroke);
  transition:background-color .28s ease,border-color .28s ease;
}
.nav-in{display:flex;align-items:center;gap:14px;min-height:64px;flex-wrap:wrap;
  width:100%;max-width:1080px;margin:0 auto;padding:0 20px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text)}
.brand:hover{text-decoration:none}
.brand svg{width:32px;height:32px;display:block;border-radius:8px}
.brand-name{font-weight:800;letter-spacing:-.02em;font-size:1.02rem}
.nav-links{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.nav-links a{color:var(--muted);font-size:.9rem;font-weight:500;padding:7px 12px;
  border-radius:999px;transition:color .2s,background .2s}
.nav-links a:hover{color:var(--text);background:var(--btn-hover);text-decoration:none}

.theme-toggle{
  margin-left:6px;width:38px;height:38px;flex:none;display:grid;place-items:center;
  border-radius:999px;border:1px solid var(--stroke);background:var(--btn);
  color:var(--muted);cursor:pointer;padding:0;
  transition:color .2s,background .2s,border-color .2s,transform .2s,box-shadow .25s;
}
.theme-toggle:hover{color:var(--text);background:var(--btn-hover);
  border-color:rgba(109,93,252,.55);transform:translateY(-1px);
  box-shadow:0 8px 22px -12px rgba(109,93,252,.9)}
.theme-toggle svg{width:18px;height:18px;display:block}
.theme-toggle .i-moon{display:none}
:root[data-theme="light"] .theme-toggle .i-moon{display:block}
:root[data-theme="light"] .theme-toggle .i-sun{display:none}

main{padding:44px 0 20px}
.crumb{font-size:.84rem;color:var(--muted);margin:0 0 18px}
.crumb a{color:var(--muted)}
h1{font-size:clamp(1.7rem,4.4vw,2.5rem);line-height:1.15;font-weight:800;
  letter-spacing:-.03em;margin:0 0 10px;background:var(--heading);
  -webkit-background-clip:text;background-clip:text;color:transparent}
h2{font-size:clamp(1.15rem,2.6vw,1.45rem);font-weight:700;letter-spacing:-.02em;
  margin:34px 0 10px}
h3{font-size:1.02rem;font-weight:600;margin:20px 0 6px}
p,li{color:var(--body-text)}
p{margin:0 0 14px}
ul,ol{margin:0 0 14px;padding-left:22px}
li{margin-bottom:7px}
.updated{font-size:.86rem;color:var(--muted);margin:0 0 26px}
.lead{padding:18px 20px;border-radius:var(--r);border:1px solid var(--stroke);
  background:var(--card);font-size:1.02rem;color:var(--lead-text);margin:0 0 26px;
  box-shadow:var(--card-shadow)}
code{background:var(--code-bg);border:1px solid var(--code-br);
  padding:1px 6px;border-radius:6px;font-size:.86em;color:var(--code-fg)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:12px;
  background:var(--grad);color:#fff;font-weight:600;font-size:.92rem;
  box-shadow:0 8px 26px -10px rgba(109,93,252,.85);transition:transform .15s,box-shadow .25s}
.btn:hover{text-decoration:none;transform:translateY(-1px);
  box-shadow:0 14px 34px -10px rgba(109,93,252,1)}

footer{border-top:1px solid var(--stroke);margin-top:44px;padding:26px 0 34px;
  color:var(--muted);font-size:.86rem}
.foot-in{display:flex;gap:14px;flex-wrap:wrap;align-items:center;justify-content:space-between;
  width:100%;max-width:1080px;margin:0 auto;padding:0 20px}
.foot-links{display:flex;gap:16px;flex-wrap:wrap}
@media (max-width:820px){
  .nav-links a{padding:6px 9px;font-size:.83rem}
  .theme-toggle{width:34px;height:34px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ---- Blog ---- */
.blog-wrap{max-width:820px}
.post-list{display:grid;gap:18px;margin:26px 0 0;padding:0;list-style:none}
.post-card{border:1px solid var(--stroke);border-radius:var(--r);background:var(--card);
  overflow:hidden;box-shadow:var(--card-shadow);transition:transform .2s,border-color .2s,box-shadow .25s}
.post-card:hover{transform:translateY(-3px);border-color:rgba(109,93,252,.55)}
.post-card a{display:block;color:inherit}
.post-card a:hover{text-decoration:none}
.post-card img{width:100%;height:auto;display:block;aspect-ratio:1200/630;object-fit:cover;
  border-bottom:1px solid var(--stroke)}
.post-card .body{padding:18px 20px}
.post-card h2{margin:0 0 8px;font-size:1.15rem;line-height:1.3}
.post-card p{margin:0;font-size:.93rem;color:var(--muted)}
.post-meta{font-size:.82rem;color:var(--muted);margin:0 0 6px;display:flex;gap:10px;flex-wrap:wrap}
.hero-img{width:100%;height:auto;display:block;border-radius:var(--r);
  border:1px solid var(--stroke);margin:0 0 26px;box-shadow:var(--card-shadow)}
.tw{overflow-x:auto;border:1px solid var(--stroke);border-radius:var(--r);background:var(--card);
  margin:0 0 18px;box-shadow:var(--card-shadow)}
table{border-collapse:collapse;width:100%;min-width:460px;font-size:.92rem}
caption{text-align:left;padding:14px 18px 0;color:var(--muted);font-size:.85rem}
th,td{padding:12px 18px;text-align:left;border-bottom:1px solid var(--stroke);vertical-align:top}
thead th{color:var(--text);font-weight:600;font-size:.85rem;background:rgba(127,127,127,.06)}
tbody tr:last-child td{border-bottom:none}
details{border:1px solid var(--stroke);border-radius:var(--r);background:var(--card);
  padding:14px 18px;margin-bottom:10px;box-shadow:var(--card-shadow)}
details[open]{border-color:rgba(109,93,252,.5)}
summary{cursor:pointer;font-weight:600;list-style:none;color:var(--text)}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";float:right;color:var(--b);font-weight:700;font-size:1.2rem}
details[open] summary::after{content:"–"}
details p{margin:10px 0 2px;font-size:.94rem;color:var(--muted)}
blockquote{margin:0 0 16px;padding:14px 18px;border-left:3px solid var(--v);
  background:var(--card);border-radius:0 var(--r) var(--r) 0;color:var(--lead-text)}
.cta{padding:20px;border:1px solid var(--stroke);border-radius:var(--r);background:var(--card);
  margin:28px 0;box-shadow:var(--card-shadow)}
.cta p{margin:0 0 14px}