/* AIHub — Clean Light Pro theme. Mobile-first, light, professional. */
:root{
  --indigo-950:#17123a;
  --indigo-900:#221c5e;
  --indigo-700:#4338ca;
  --violet-600:#7c3aed;
  --violet-100:#ede9fe;
  --bg:#f5f6fb;
  --card:#ffffff;
  --text:#1e2433;
  --muted:#5b6478;
  --border:#e2e7f2;
  --radius:14px;
  --shadow:0 6px 24px rgba(34,28,94,.07);
  --shadow-lg:0 12px 40px rgba(34,28,94,.13);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans",Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;font-size:16px;
}
.container{max-width:1080px;margin:0 auto;padding:0 18px}
a{color:var(--indigo-700);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- header ---------- */
.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;gap:14px;padding:12px 18px;max-width:1080px;margin:0 auto}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.25rem;color:var(--indigo-950);white-space:nowrap}
.logo:hover{text-decoration:none}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--indigo-700),var(--violet-600));color:#fff;font-size:1.15rem}
.main-nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{padding:8px 12px;border-radius:8px;color:var(--text);font-weight:600;font-size:.92rem;white-space:nowrap}
.main-nav a:hover{background:var(--violet-100);text-decoration:none}
.lang-btn{margin-left:6px;border:2px solid var(--indigo-700);background:#fff;color:var(--indigo-700);font-weight:700;border-radius:999px;padding:7px 16px;cursor:pointer;font-size:.9rem;white-space:nowrap}
.lang-btn:hover{background:var(--indigo-700);color:#fff}

/* ---------- hero ---------- */
.hero{background:linear-gradient(135deg,var(--indigo-950) 0%,var(--indigo-900) 55%,#4c1d95 100%);color:#fff;padding:56px 0 48px;background-size:180% 180%;animation:heroShift 14s ease-in-out infinite alternate}
@keyframes heroShift{from{background-position:0% 20%}to{background-position:100% 80%}}
.hero h1{font-size:2rem;line-height:1.25;margin-bottom:12px}
.hero h1 .grad{background:linear-gradient(90deg,#c4b5fd,#f0abfc);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:#d8d4f5;max-width:640px;font-size:1.05rem}
.hero .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.hero .badge{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);padding:6px 14px;border-radius:999px;font-size:.85rem;font-weight:600;animation:badgeIn .55s cubic-bezier(.16,1,.3,1) both}
@keyframes badgeIn{from{opacity:0;transform:translateY(10px) scale(.94)}to{opacity:1;transform:none}}

/* ---------- cards & grids ---------- */
.section{padding:44px 0}
.section h2{font-size:1.5rem;margin-bottom:6px;color:var(--indigo-950)}
.section .sub{color:var(--muted);margin-bottom:22px}
.card-grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:960px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:8px;transition:transform .18s ease,box-shadow .18s ease}
.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);text-decoration:none}
.tool-card .icon{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.35rem;color:#fff;background:linear-gradient(135deg,var(--indigo-700),var(--violet-600))}
.tool-card h3{color:var(--indigo-950);font-size:1.08rem}
.tool-card p{color:var(--muted);font-size:.92rem;flex:1}
.tool-card .go{color:var(--violet-600);font-weight:700;font-size:.92rem}

/* ---------- tool layout ---------- */
.tool-layout{display:grid;grid-template-columns:1fr;gap:18px;margin-top:22px}
@media(min-width:900px){.tool-layout{grid-template-columns:1.05fr .95fr;align-items:start}}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.card h2{font-size:1.2rem;color:var(--indigo-950);margin-bottom:16px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:700;margin-bottom:8px;font-size:.95rem}
.field .row{display:flex;gap:10px;align-items:center}
input[type=text],select,textarea{
  width:100%;padding:13px 14px;font-size:1.02rem;border:2px solid var(--border);border-radius:10px;background:#fbfbfe;color:var(--text);font-family:inherit;
}
textarea{min-height:130px;resize:vertical}
input[type=text]:focus,select:focus,textarea:focus{outline:none;border-color:var(--violet-600);background:#fff;box-shadow:0 0 0 3px rgba(124,58,237,.12)}

/* segmented control */
.segmented{display:flex;background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:4px;gap:4px;flex-wrap:wrap}
.segmented button{flex:1;border:0;background:transparent;padding:11px 8px;border-radius:9px;font-weight:700;font-size:.92rem;color:var(--muted);cursor:pointer;transition:background .25s,color .25s,box-shadow .25s,transform .1s;white-space:nowrap;min-width:70px}
.segmented button.active{background:#fff;color:var(--indigo-950);box-shadow:0 2px 8px rgba(34,28,94,.12)}
.segmented button:active{transform:scale(.97)}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:2px solid var(--border);background:#fff;border-radius:999px;padding:8px 14px;font-size:.88rem;font-weight:600;color:var(--muted);cursor:pointer;transition:all .18s}
.chip.on{border-color:var(--violet-600);background:var(--violet-100);color:var(--indigo-900)}

/* primary button */
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:14px;border:0;border-radius:12px;background:linear-gradient(135deg,var(--indigo-700),var(--violet-600));color:#fff;font-size:1.05rem;font-weight:800;cursor:pointer;transition:transform .15s,box-shadow .15s,filter .15s}
.btn-primary:hover{filter:brightness(1.08);box-shadow:var(--shadow-lg)}
.btn-primary:active{transform:scale(.98)}

/* output */
.output{background:#0f0c29;color:#e9e6ff;border-radius:var(--radius);padding:22px;margin-top:4px;position:relative}
.output .out-label{font-size:.82rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#a78bfa;margin-bottom:10px}
.output pre{white-space:pre-wrap;font-family:inherit;font-size:.98rem;line-height:1.65;color:#f1efff}
.copy-btn{margin-top:14px;border:2px solid rgba(167,139,250,.5);background:transparent;color:#d8ccff;font-weight:700;border-radius:10px;padding:10px 18px;cursor:pointer;font-size:.95rem;transition:all .18s}
.copy-btn:hover{background:rgba(124,58,237,.25);border-color:#a78bfa}
.copy-btn.done{background:#10b981;border-color:#10b981;color:#fff}

/* score ring */
.score-wrap{display:flex;align-items:center;gap:18px;margin-bottom:14px}
.score-ring{width:96px;height:96px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:800;color:#fff;background:conic-gradient(var(--violet-600) 0deg,#e2e7f2 0deg);position:relative;flex-shrink:0;transition:background 1s ease}
.score-ring span{background:var(--indigo-950);width:74px;height:74px;border-radius:50%;display:flex;align-items:center;justify-content:center}
.kv{display:flex;justify-content:space-between;gap:10px;padding:10px 2px;border-bottom:1px dashed var(--border);font-size:.95rem}
.kv:last-child{border-bottom:0}
.kv .k{color:var(--muted);font-weight:600}
.kv .v{font-weight:700;color:var(--indigo-950);text-align:right}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.tag{background:var(--violet-100);color:var(--indigo-900);border-radius:8px;padding:5px 12px;font-size:.85rem;font-weight:600}
.tag.miss{background:#fee2e2;color:#991b1b}
.tag.hit{background:#d1fae5;color:#065f46}

/* info / faq */
.info-block{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-top:26px}
.info-block h2{font-size:1.2rem;color:var(--indigo-950);margin-bottom:10px}
.info-block p,.info-block li{color:#33415c;font-size:.96rem}
.info-block ul{padding-left:20px;margin:8px 0}
.faq{margin-top:8px}
.faq details{border:1px solid var(--border);border-radius:10px;margin-bottom:10px;background:#fff}
.faq summary{padding:14px 16px;font-weight:700;cursor:pointer;color:var(--indigo-950);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--violet-600);font-size:1.2rem}
.faq details[open] summary::after{content:"–"}
.faq details[open] .a{animation:faqIn .32s ease}
@keyframes faqIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
.faq .a{padding:0 16px 16px;color:#33415c;font-size:.95rem}

/* footer */
footer{background:var(--indigo-950);color:#c9c4ee;margin-top:56px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:22px;padding:40px 0 10px}
@media(min-width:720px){.footer-grid{grid-template-columns:1.2fr 1fr 1fr}}
footer h4{color:#fff;margin-bottom:10px;font-size:1rem}
footer a{color:#c9c4ee;font-size:.92rem}
footer ul{list-style:none}
footer li{margin-bottom:7px}
.disclaimer{font-size:.82rem;color:#9a94c7;border-top:1px solid rgba(255,255,255,.14);margin-top:18px;padding:16px 0}
.copy{font-size:.82rem;color:#7e78ad;padding-bottom:26px}

/* misc */
.page-head{padding:36px 0 6px}
.page-head h1{font-size:1.7rem;color:var(--indigo-950)}
.page-head p{color:var(--muted);max-width:680px}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:10px}
.note{background:#fffaeb;border:1px solid #f0d48a;border-radius:10px;padding:12px 14px;font-size:.9rem;color:#7a5b16;margin-top:14px}

/* ---------- professional animations ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .65s ease,transform .65s cubic-bezier(.16,1,.3,1)}
.reveal.revealed{opacity:1;transform:none}
.logo-mark{animation:markGlow 4s ease-in-out infinite}
@keyframes markGlow{0%,100%{box-shadow:0 0 0 0 rgba(124,58,237,.35)}50%{box-shadow:0 0 0 7px rgba(124,58,237,0)}}
.output.pop{animation:outPop .45s cubic-bezier(.16,1,.3,1)}
@keyframes outPop{0%{transform:scale(1)}35%{transform:scale(1.015)}100%{transform:scale(1)}}
.lang-btn{transition:transform .18s,background .18s,color .18s}
.lang-btn:active{transform:scale(.94)}
.tool-card .icon{transition:transform .25s}
.tool-card:hover .icon{transform:scale(1.1) rotate(-6deg)}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

@media(max-width:640px){
  .hero h1{font-size:1.55rem}
  .card{padding:18px}
  .tool-layout{grid-template-columns:1fr}
}