:root{
  --ink:#162033;--muted:#68738a;--paper:#fff;--bg:#f6f8fc;--line:#e4e8f0;
  --accent:#5b4cf6;--accent2:#7b68ff;--shadow:0 18px 55px rgba(24,34,61,.10);
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{text-decoration:none;color:inherit}.topbar{height:76px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(5vw,24px);position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;letter-spacing:-.5px}.brand b{color:var(--accent)}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--accent);color:#fff;font-weight:900;box-shadow:0 8px 20px rgba(91,76,246,.25)}
nav{display:flex;gap:28px;color:#566177;font-size:14px;font-weight:650}.menu{display:none;border:0;background:none;font-size:24px}
.hero{background:radial-gradient(circle at 85% 20%,#ddd8ff 0,transparent 31%),linear-gradient(135deg,#f1efff,#fff 62%);border-bottom:1px solid var(--line)}
.hero-inner{max-width:1120px;margin:auto;padding:96px 24px 88px}.eyebrow{font-size:11px;letter-spacing:1.7px;font-weight:800;color:var(--accent)}
h1{font-size:clamp(42px,6vw,72px);line-height:1.02;letter-spacing:-3px;margin:18px 0;color:#121a2b}h1 span{color:var(--accent)}
.hero p{font-size:18px;line-height:1.65;color:var(--muted);max-width:650px}.hero-btn,.primary{display:inline-flex;align-items:center;gap:12px;border:0;border-radius:12px;background:var(--accent);color:white;padding:14px 19px;font-weight:750;cursor:pointer;box-shadow:0 10px 24px rgba(91,76,246,.22)}
.tools-section{max-width:1120px;margin:auto;padding:70px 24px}.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:26px}h2{font-size:34px;letter-spacing:-1.4px;margin:8px 0 0}.search{height:46px;width:260px;background:#fff;border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;padding:0 13px;gap:8px}.search span{font-size:24px;color:#8992a6}.search input{border:0;outline:0;width:100%;font-size:14px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.tool-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:22px;min-height:178px;display:flex;flex-direction:column;transition:.2s;cursor:pointer}.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#d5d0ff}.tool-icon{width:45px;height:45px;border-radius:12px;background:#f0efff;color:var(--accent);display:grid;place-items:center;font-size:22px;font-weight:800;margin-bottom:18px}.tool-card h3{margin:0 0 7px;font-size:17px}.tool-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
.workspace{max-width:900px;margin:0 auto 70px;padding:0 24px}.workspace-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px;box-shadow:var(--shadow)}.workspace-head{display:flex;justify-content:space-between}.workspace-head h2{margin-bottom:5px}.workspace-head p{margin:0;color:var(--muted)}.close{border:0;background:#f0f2f7;border-radius:10px;width:40px;height:40px;font-size:25px;cursor:pointer}
.dropzone{border:2px dashed #cdd3e0;border-radius:18px;text-align:center;padding:42px 20px;margin-top:25px;background:#fbfcff}.upload-icon{width:48px;height:48px;border-radius:14px;background:#eeecff;color:var(--accent);display:grid;place-items:center;margin:0 auto 12px;font-size:25px;font-weight:800}.dropzone h3{margin:0 0 4px}.dropzone p{margin:0 0 12px;color:var(--muted)}.dropzone small{display:block;color:#8a93a5;margin-top:14px}.file-list{margin-top:15px;display:grid;gap:8px}.file{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;border:1px solid var(--line);border-radius:11px;font-size:14px}.file span{color:var(--muted);font-size:12px}.actions{display:flex;gap:10px;margin-top:18px}.secondary{border:1px solid var(--line);background:#fff;border-radius:11px;padding:12px 16px;font-weight:700;cursor:pointer}.status{margin-top:15px;font-size:14px;color:var(--muted)}.hidden{display:none}
.about{max-width:1120px;margin:0 auto 70px;padding:48px 24px;display:grid;grid-template-columns:1fr 1fr;gap:60px;border-top:1px solid var(--line)}.about p{color:var(--muted);line-height:1.7;margin:0;font-size:16px}
footer{background:#111827;color:#cbd2df;padding:36px max(5vw,24px);display:flex;align-items:center;justify-content:space-between;font-size:13px}footer .brand{color:#fff}footer p{margin:0}
@media(max-width:850px){.grid{grid-template-columns:repeat(2,1fr)}.about{grid-template-columns:1fr;gap:20px}.section-head{align-items:stretch;gap:18px;flex-direction:column}.search{width:100%}}
@media(max-width:560px){nav{display:none}.menu{display:block}.grid{grid-template-columns:1fr}.hero-inner{padding:70px 24px}h1{letter-spacing:-2px}.workspace-card{padding:18px}footer{flex-direction:column;gap:15px;align-items:flex-start}}