:root{
  --bg:#f6f7fb;--surface:#ffffff;--ink:#141a2b;--muted:#5f6b82;--line:#e5e8f0;
  --brand:#3b5bdb;--brand-ink:#ffffff;--brand-soft:#e8edff;--accent:#12b886;
  --warn:#f08c00;--danger:#e03131;--radius:14px;--shadow:0 1px 2px rgba(20,26,43,.06),0 8px 24px rgba(20,26,43,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font:inherit;color:inherit}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:999px;font-weight:600;font-size:15px;transition:transform .15s,box-shadow .15s,background .15s}
.btn-primary{background:var(--brand);color:var(--brand-ink);box-shadow:0 6px 18px rgba(59,91,219,.28)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-ghost{border:1px solid var(--line);background:var(--surface)}
.btn-ghost:hover{border-color:#cdd3e1}
.logo{display:flex;align-items:center;gap:10px;font-weight:750;font-size:18px;letter-spacing:-.2px}
.logo-mark{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,#3b5bdb,#15aabf);display:grid;place-items:center}
.logo-mark svg{width:18px;height:18px}

/* ---------- landing ---------- */
.site-header{position:sticky;top:0;z-index:20;background:rgba(246,247,251,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.site-nav{display:flex;align-items:center;gap:26px;font-size:15px;color:var(--muted)}
.site-nav a:hover{color:var(--ink)}
.hero{padding:84px 0 56px;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:650;color:var(--brand);background:var(--brand-soft);padding:5px 12px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:clamp(34px,5vw,54px);line-height:1.08;letter-spacing:-1.2px}
.hero p{margin-top:18px;font-size:18px;color:var(--muted);max-width:520px}
.hero-cta{margin-top:30px;display:flex;gap:12px;flex-wrap:wrap}
.hero-note{margin-top:16px;font-size:13px;color:var(--muted)}
.mock{background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}
.mock-bar{display:flex;gap:6px;padding:12px 14px;border-bottom:1px solid var(--line)}
.mock-bar i{width:10px;height:10px;border-radius:50%;background:#dfe3ec}
.mock-body{display:grid;grid-template-columns:120px 1fr;min-height:280px}
.mock-side{border-right:1px solid var(--line);padding:14px 10px;display:flex;flex-direction:column;gap:8px}
.mock-side span{height:10px;border-radius:6px;background:#eef1f6}
.mock-side span.on{background:var(--brand-soft)}
.mock-main{padding:16px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;align-content:start}
.mock-tile{border:1px solid var(--line);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:8px}
.mock-tile b{width:28px;height:22px;border-radius:5px}
.mock-tile span{height:8px;border-radius:5px;background:#eef1f6}
.mock-tile span.s{width:60%}
section.block{padding:64px 0;border-top:1px solid var(--line)}
section.block h2{font-size:30px;letter-spacing:-.5px}
section.block .lead{color:var(--muted);margin-top:8px;max-width:560px}
.features{margin-top:34px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.feature .ico{width:40px;height:40px;border-radius:11px;background:var(--brand-soft);display:grid;place-items:center;margin-bottom:14px}
.feature .ico svg{width:20px;height:20px;stroke:var(--brand)}
.feature h3{font-size:17px;margin-bottom:6px}
.feature p{font-size:14.5px;color:var(--muted)}
.plans{margin-top:34px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.plan{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column}
.plan.pop{border:2px solid var(--brand);position:relative}
.plan.pop::before{content:"Most popular";position:absolute;top:-12px;left:24px;background:var(--brand);color:#fff;font-size:12px;font-weight:650;padding:3px 10px;border-radius:999px}
.plan h3{font-size:16px;color:var(--muted);font-weight:600}
.plan .price{font-size:36px;font-weight:750;letter-spacing:-1px;margin:10px 0 2px}
.plan .price small{font-size:15px;color:var(--muted);font-weight:500}
.plan ul{list-style:none;margin:18px 0 24px;display:flex;flex-direction:column;gap:9px;font-size:14.5px}
.plan li::before{content:"✓";color:var(--accent);font-weight:700;margin-right:8px}
.plan .btn{margin-top:auto;justify-content:center}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.stat b{font-size:28px;letter-spacing:-.6px;display:block}
.stat span{color:var(--muted);font-size:14px}
.site-footer{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:14px}
.site-footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.site-footer nav{display:flex;gap:20px}

/* ---------- auth ---------- */
.auth{min-height:100%;display:grid;place-items:center;padding:40px 16px}
.auth-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:34px}
.auth-card .logo{justify-content:center;margin-bottom:22px}
.auth-card h1{font-size:22px;text-align:center}
.auth-card .sub{text-align:center;color:var(--muted);font-size:14.5px;margin-top:4px}
.field{margin-top:18px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px}
.field input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe;outline:none;transition:border-color .15s,box-shadow .15s}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(59,91,219,.15)}
.row{display:flex;justify-content:space-between;align-items:center;margin-top:12px;font-size:13.5px;color:var(--muted)}
.row a{color:var(--brand);font-weight:600}
.auth-card .btn{width:100%;justify-content:center;margin-top:22px;border-radius:10px}
.alert{display:none;margin-top:16px;padding:10px 12px;border-radius:10px;background:#fff5f5;color:var(--danger);font-size:13.5px;border:1px solid #ffe3e3}
.alert.show{display:block}
.auth-foot{text-align:center;margin-top:20px;font-size:13.5px;color:var(--muted)}
.auth-foot a{color:var(--brand);font-weight:600}
.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.45);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;display:none}
.loading .spinner{display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- app ---------- */
.app{display:grid;grid-template-columns:248px 1fr;height:100vh}
.side{background:var(--surface);border-right:1px solid var(--line);padding:18px 14px;display:flex;flex-direction:column;gap:6px}
.side .logo{padding:4px 8px 16px}
.side .btn{justify-content:center;margin:0 4px 14px;border-radius:12px}
.nav-item{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:10px;color:var(--muted);font-size:14.5px;font-weight:500}
.nav-item svg{width:18px;height:18px;stroke:currentColor;flex:none}
.nav-item:hover{background:#f2f4f9;color:var(--ink)}
.nav-item.on{background:var(--brand-soft);color:var(--brand);font-weight:600}
.quota{margin-top:auto;border:1px solid var(--line);border-radius:12px;padding:14px;font-size:13px;color:var(--muted)}
.quota b{color:var(--ink)}
.meter{height:7px;border-radius:99px;background:#edf0f6;margin:10px 0 8px;overflow:hidden}
.meter i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),#15aabf)}
.main{display:flex;flex-direction:column;min-width:0}
.topbar{height:64px;border-bottom:1px solid var(--line);background:var(--surface);display:flex;align-items:center;gap:14px;padding:0 22px}
.search{flex:1;max-width:520px;position:relative}
.search input{width:100%;padding:10px 14px 10px 38px;border-radius:10px;border:1px solid var(--line);background:#f6f7fb;outline:none}
.search input:focus{background:#fff;border-color:var(--brand)}
.search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;stroke:var(--muted)}
.topbar .spacer{flex:1}
.icon-btn{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;color:var(--muted)}
.icon-btn:hover{background:#f2f4f9;color:var(--ink)}
.icon-btn svg{width:18px;height:18px;stroke:currentColor}
.avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,#845ef7,#3b5bdb);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:700}
.content{padding:22px;overflow:auto;flex:1}
.demo-banner{display:flex;align-items:center;gap:10px;background:#fff9db;border:1px solid #ffec99;color:#8a6100;border-radius:12px;padding:10px 14px;font-size:13.5px;margin-bottom:18px}
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.crumbs{display:flex;align-items:center;gap:6px;font-size:20px;font-weight:700;letter-spacing:-.3px;flex-wrap:wrap}
.crumbs a{color:var(--muted);font-weight:600}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:#b7bfcf;font-weight:400}
.seg{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--surface)}
.seg button{padding:7px 10px;color:var(--muted)}
.seg button.on{background:var(--brand-soft);color:var(--brand)}
.seg svg{width:17px;height:17px;stroke:currentColor;display:block}
.section-title{font-size:13px;font-weight:650;color:var(--muted);text-transform:uppercase;letter-spacing:.6px;margin:6px 0 10px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px;margin-bottom:26px}
.card{min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:14px;cursor:pointer;transition:border-color .15s,box-shadow .15s;user-select:none}
.card:hover{border-color:#cbd3e6;box-shadow:var(--shadow)}
.card .thumb{height:92px;border-radius:10px;display:grid;place-items:center;margin-bottom:12px}
.card .thumb svg{width:38px;height:38px}
.card .name{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card .meta{font-size:12.5px;color:var(--muted);margin-top:2px}
table.files{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:14px}
table.files th{text-align:left;font-size:12.5px;font-weight:650;color:var(--muted);padding:11px 16px;border-bottom:1px solid var(--line);background:#fafbfd}
table.files td{padding:11px 16px;border-bottom:1px solid #f0f2f7}
table.files tr:last-child td{border-bottom:0}
table.files tbody tr{cursor:pointer}
table.files tbody tr:hover{background:#f8f9fc}
.fname{display:flex;align-items:center;gap:11px;font-weight:550}
.fname svg{width:22px;height:22px;flex:none}
.muted{color:var(--muted)}
.empty{padding:60px 20px;text-align:center;color:var(--muted);background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius)}
.modal-back{position:fixed;inset:0;background:rgba(20,26,43,.42);display:none;place-items:center;padding:16px;z-index:50}
.modal-back.show{display:grid}
.modal{width:100%;max-width:480px;background:var(--surface);border-radius:18px;box-shadow:0 20px 60px rgba(20,26,43,.25);padding:24px}
.modal h3{font-size:18px}
.drop{display:block;cursor:pointer;margin-top:16px;border:2px dashed #cdd5e6;border-radius:14px;padding:34px 16px;text-align:center;color:var(--muted);font-size:14px;transition:border-color .15s,background .15s}
.drop.over{border-color:var(--brand);background:var(--brand-soft)}
.drop svg{width:34px;height:34px;stroke:var(--brand);margin-bottom:8px}
.drop b{color:var(--brand)}
.queue{margin-top:14px;display:flex;flex-direction:column;gap:8px;max-height:180px;overflow:auto}
.qitem{border:1px solid var(--line);border-radius:10px;padding:9px 12px;font-size:13.5px}
.qitem .bar{height:5px;border-radius:9px;background:#edf0f6;margin-top:7px;overflow:hidden}
.qitem .bar i{display:block;height:100%;width:0;background:var(--brand);transition:width .25s}
.qitem.err{border-color:#ffd8a8;background:#fff9f0}
.qitem.err .note{color:var(--warn);font-size:12.5px;margin-top:4px}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:#141a2b;color:#fff;padding:11px 18px;border-radius:12px;font-size:14px;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none;z-index:60}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.burger{display:none}

/* ---------- 404 ---------- */
.nf{min-height:100%;display:grid;place-items:center;text-align:center;padding:40px 16px}
.nf b{font-size:88px;letter-spacing:-4px;background:linear-gradient(135deg,#3b5bdb,#15aabf);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.nf h1{font-size:22px;margin-top:10px}
.nf p{color:var(--muted);margin:8px 0 22px}

@media (max-width:900px){
  .hero{grid-template-columns:1fr;padding-top:56px}
  .features,.plans{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .site-nav .hide-sm{display:none}
  .app{grid-template-columns:1fr}
  .side{position:fixed;inset:0 auto 0 0;width:260px;z-index:40;transform:translateX(-100%);transition:transform .2s;box-shadow:var(--shadow)}
  .side.open{transform:none}
  .burger{display:grid}
  .topbar{padding:0 12px;gap:8px}
  .topbar .spacer{display:none}
  .content{padding:16px}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .card .thumb{height:70px}
  table.files .hide-sm{display:none}
}