:root{
  --bg:#131318;
  --bg-soft:#1b1b22;
  --card:#20202a;
  --border:rgba(255,255,255,.08);
  --text:#f4f4f6;
  --muted:#a4a4b2;
  --purple:#8b2fc9;
  --violet:#a944e0;
  --orange:#ff7043;
  --pink:#e0447c;
  --grad:linear-gradient(100deg,#8b2fc9 0%,#c9427e 55%,#ff7043 100%);
  --grad-soft:linear-gradient(100deg,rgba(139,47,201,.18),rgba(255,112,67,.14));
  --chip-text:#d9a8ff;
  --glow-a:rgba(139,47,201,.35);
  --glow-b:rgba(255,112,67,.28);
  --nav-bg:rgba(19,19,24,.8);
  --radius:18px;
  --good:#4ade80;
  --mid:#ffb043;
  --bad:#f87171;
}
html[data-theme="light"]{
  --bg:#f7f7fa;
  --bg-soft:#efeff4;
  --card:#ffffff;
  --border:rgba(20,20,35,.1);
  --text:#1a1a22;
  --muted:#5d5d6e;
  --grad-soft:linear-gradient(100deg,rgba(139,47,201,.1),rgba(255,112,67,.08));
  --chip-text:#8b2fc9;
  --glow-a:rgba(139,47,201,.16);
  --glow-b:rgba(255,112,67,.14);
  --nav-bg:rgba(247,247,250,.85);
  --good:#16a34a;
  --mid:#d97706;
  --bad:#dc2626;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}

body{
  background:var(--bg);
  color:var(--text);
  font-family:'Inter',system-ui,sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  padding:28px 20px 64px;
  transition:background .25s ease,color .25s ease;
}

h1,h2,h3{font-family:'Sora',sans-serif;line-height:1.15}

.glow{position:fixed;border-radius:50%;filter:blur(90px);pointer-events:none;z-index:0}
.glow-a{width:420px;height:420px;background:var(--glow-a);top:-120px;left:-100px}
.glow-b{width:380px;height:380px;background:var(--glow-b);top:30%;right:-140px}

.wrapper{max-width:900px;margin:0 auto;position:relative;z-index:1}

nav{
  display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
  margin-bottom:52px;padding:12px 18px;
  background:var(--nav-bg);backdrop-filter:blur(12px);
  border:1px solid var(--border);border-radius:999px;
}

.logo{font-family:'Sora',sans-serif;font-weight:800;font-size:19px;letter-spacing:-.3px;color:var(--text);text-decoration:none}
.logo span{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

.nav-right{display:flex;gap:8px;align-items:center}

.nav-link{
  font-family:'Inter',sans-serif;font-size:13.5px;font-weight:600;
  padding:9px 18px;background:transparent;border:1px solid transparent;
  border-radius:999px;color:var(--muted);cursor:pointer;transition:all .18s ease;
  text-decoration:none;display:inline-block;
}
.nav-link:hover{color:var(--text)}
.nav-link.active{background:var(--grad);color:#fff}
.nav-link:focus-visible{outline:2px solid var(--violet);outline-offset:2px}

.theme-toggle{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--border);
  background:var(--card);color:var(--text);cursor:pointer;font-size:15px;
  display:flex;align-items:center;justify-content:center;transition:all .18s ease;
}
.theme-toggle:hover{border-color:var(--violet)}
.theme-toggle:focus-visible{outline:2px solid var(--violet);outline-offset:2px}

.hero{margin-bottom:44px}

.hero-chip{
  display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.4px;
  padding:7px 16px;border-radius:999px;background:var(--grad-soft);
  color:var(--chip-text);border:1px solid var(--border);margin-bottom:18px;
}

.hero h1{font-weight:800;font-size:clamp(30px,5.4vw,52px);letter-spacing:-1.2px;max-width:720px}
.hero h1 em{
  font-style:normal;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}

.hero-sub{margin-top:16px;font-size:15.5px;color:var(--muted);max-width:580px}

.platforms{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}

.platform-btn{
  font-family:'Inter',sans-serif;font-size:13.5px;font-weight:600;
  padding:9px 18px;background:var(--bg-soft);border:1px solid var(--border);
  border-radius:999px;color:var(--muted);cursor:pointer;transition:all .18s ease;
}
.platform-btn:hover{color:var(--text);border-color:var(--violet)}
.platform-btn:focus-visible{outline:2px solid var(--violet);outline-offset:2px}
.platform-btn.active{background:var(--grad);color:#fff;border-color:transparent}

.input-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px}

.input-label{
  font-size:13px;font-weight:600;color:var(--muted);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:10px;
}
.char-count{font-weight:500}
.char-count.over{color:var(--bad)}

textarea{
  width:100%;min-height:92px;background:var(--bg);border:1px solid var(--border);
  border-radius:12px;color:var(--text);font-family:'Inter',sans-serif;
  font-size:15.5px;line-height:1.55;padding:14px 16px;resize:vertical;transition:border-color .18s ease;
}
textarea:focus{outline:none;border-color:var(--violet)}
textarea::placeholder{color:var(--muted)}

.input-footer{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:14px;flex-wrap:wrap}
.platform-tip{font-size:13px;color:var(--muted);max-width:480px}

.analyze-btn{
  font-family:'Sora',sans-serif;font-weight:700;font-size:14.5px;
  background:var(--grad);color:#fff;border:none;border-radius:999px;
  padding:13px 30px;cursor:pointer;transition:transform .12s ease,box-shadow .18s ease,opacity .18s ease;
  box-shadow:0 6px 22px var(--glow-a);text-decoration:none;display:inline-block;
}
.analyze-btn:hover{transform:translateY(-1px);box-shadow:0 8px 26px var(--glow-a)}
.analyze-btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.analyze-btn:focus-visible{outline:2px solid var(--text);outline-offset:2px}

.preview-card{margin-top:16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 22px}
.preview-title{font-size:12.5px;font-weight:600;letter-spacing:.3px;color:var(--chip-text);margin-bottom:12px}
.feed-row{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:14px 16px;font-size:14.5px;line-height:1.55}
.feed-visible{color:var(--text)}
.feed-cut{color:var(--muted);opacity:.45;text-decoration:line-through;text-decoration-color:rgba(248,113,113,.55)}
.feed-more{color:var(--muted);font-size:12.5px;margin-left:6px}
.feed-sender{font-size:11.5px;font-weight:600;letter-spacing:.6px;color:var(--muted);margin-bottom:5px}

#results{margin-top:28px;display:none}
#results.show{display:block;animation:fadeUp .4s ease both}

.score-grid{display:grid;grid-template-columns:190px 1fr;gap:16px;margin-bottom:16px}
@media (max-width:640px){.score-grid{grid-template-columns:1fr}}

.overall-box{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 16px;text-align:center;display:flex;flex-direction:column;justify-content:center;
  position:relative;overflow:hidden;
}
.overall-box::before{content:'';position:absolute;inset:0;background:var(--grad-soft);pointer-events:none}
.overall-num{font-family:'Sora',sans-serif;font-weight:800;font-size:58px;line-height:1;position:relative}
.overall-label{font-size:12px;font-weight:600;letter-spacing:.5px;color:var(--muted);margin-top:8px;position:relative}

.dims-box{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;display:flex;flex-direction:column;justify-content:center;gap:14px;
}
.dim{display:grid;grid-template-columns:105px 1fr 38px;align-items:center;gap:12px}
.dim-name{font-size:13px;font-weight:600;color:var(--muted)}
.dim-track{height:8px;background:var(--bg);border-radius:999px;overflow:hidden}
.dim-fill{height:100%;border-radius:999px;width:0;background:var(--grad);transition:width .8s cubic-bezier(.2,.8,.2,1)}
.dim-val{font-size:13.5px;font-weight:600;text-align:right}

.verdict{
  background:var(--card);border:1px solid var(--border);border-left:3px solid var(--violet);
  border-radius:var(--radius);padding:18px 22px;font-size:15px;margin-bottom:16px;
}

.notes-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:26px}
@media (max-width:640px){.notes-grid{grid-template-columns:1fr}}
.note-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 22px}
.note-title{font-family:'Sora',sans-serif;font-size:13px;font-weight:700;letter-spacing:.3px;margin-bottom:12px}
.note-title.works{color:var(--good)}
.note-title.fix{color:var(--mid)}
.note-box ul{list-style:none}
.note-box li{font-size:14px;line-height:1.55;padding-left:18px;position:relative;margin-bottom:9px}
.note-box li::before{content:'\2022';position:absolute;left:0;color:var(--violet)}

.rewrites-title{font-family:'Sora',sans-serif;font-weight:700;font-size:22px;letter-spacing:-.4px;margin-bottom:14px}
.rewrites-title span{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

.rewrite-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px 22px;margin-bottom:12px;display:flex;justify-content:space-between;
  align-items:flex-start;gap:16px;transition:border-color .18s ease;
}
.rewrite-card:hover{border-color:var(--violet)}
.rewrite-angle{
  display:inline-block;font-size:11.5px;font-weight:600;letter-spacing:.4px;
  padding:4px 12px;border-radius:999px;background:var(--grad-soft);color:var(--chip-text);margin-bottom:10px;
}
.rewrite-text{font-size:15.5px;line-height:1.55}

.copy-btn{
  flex-shrink:0;font-family:'Inter',sans-serif;font-size:13px;font-weight:600;
  background:transparent;border:1px solid var(--border);border-radius:999px;
  color:var(--muted);padding:8px 18px;cursor:pointer;transition:all .18s ease;
}
.copy-btn:hover{border-color:var(--violet);color:var(--chip-text)}
.copy-btn:focus-visible{outline:2px solid var(--violet);outline-offset:2px}
.copy-btn.copied{border-color:var(--good);color:var(--good)}

#loading{display:none;margin-top:28px;text-align:center;padding:42px 20px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius)}
#loading.show{display:block}
.loading-text{font-size:13.5px;font-weight:600;letter-spacing:.5px;color:var(--chip-text);animation:pulse 1.4s ease infinite}
@keyframes pulse{0%,100%{opacity:.4}50%{opacity:1}}

#error{display:none;margin-top:16px;background:var(--card);border:1px solid rgba(248,113,113,.4);border-radius:var(--radius);padding:15px 20px;font-size:14px;color:var(--bad)}
#error.show{display:block}

/* Best practices pages */
.bp-intro{font-size:15px;color:var(--muted);max-width:660px;margin-bottom:30px}
.bp-intro strong{color:var(--text);font-weight:600}

.bp-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;margin-bottom:18px}

.bp-head{display:flex;align-items:center;gap:12px;margin-bottom:4px;flex-wrap:wrap}
.bp-dot{width:11px;height:11px;border-radius:50%;flex-shrink:0}
.bp-card h2,.bp-card h3{font-weight:700;font-size:22px;letter-spacing:-.4px}
.bp-limit{
  font-size:11.5px;font-weight:600;letter-spacing:.3px;color:var(--chip-text);
  background:var(--grad-soft);border-radius:999px;padding:4px 12px;
}

.bp-card p{font-size:14px;color:var(--muted);margin:12px 0;max-width:680px}
.bp-card p strong{color:var(--text);font-weight:600}

.bp-card ul{list-style:none;margin:14px 0}
.bp-card li{font-size:14px;line-height:1.6;padding-left:20px;position:relative;margin-bottom:9px}
.bp-card li::before{content:'\2192';position:absolute;left:0;font-size:12px;top:2px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

.bp-example{
  background:var(--bg);border:1px solid var(--border);border-radius:12px;
  padding:15px 17px;margin-top:14px;font-size:14px;line-height:1.6;
}
.bp-example .weak{color:var(--muted);text-decoration:line-through;text-decoration-color:rgba(248,113,113,.55)}
.bp-example .strong-ex{color:var(--text);display:block;margin-top:6px;font-weight:500}
.bp-example .strong-ex::before{content:'\21B3  ';color:var(--good)}

.bp-cta{
  margin-top:30px;text-align:center;padding:36px 22px;
  background:var(--grad-soft);border:1px solid var(--border);border-radius:var(--radius);
}
.bp-cta p{font-size:15px;color:var(--muted);margin-bottom:18px}

.bp-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:640px){.bp-grid{grid-template-columns:1fr}}
.bp-tile{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;text-decoration:none;color:var(--text);transition:border-color .18s ease,transform .12s ease;
  display:block;
}
.bp-tile:hover{border-color:var(--violet);transform:translateY(-2px)}
.bp-tile h2{font-size:18px;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.bp-tile p{font-size:13.5px;color:var(--muted)}

article.bp-article h1{font-weight:800;font-size:clamp(28px,4.8vw,42px);letter-spacing:-1px;max-width:720px;margin-bottom:14px}
article.bp-article .lede{font-size:16px;color:var(--muted);max-width:640px;margin-bottom:28px}
article.bp-article section{margin-bottom:8px}

footer{margin-top:56px;padding-top:24px;border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
footer .foot-links{display:flex;gap:14px;flex-wrap:wrap;margin-top:10px}
footer a{color:var(--muted);text-decoration:none;font-size:13px}
footer a:hover{color:var(--chip-text)}

@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}