:root{--bg:#f6f7fb;--surface:#fff;--surface2:#eef0f7;--text:#151826;--muted:#667085;--border:#e4e7ef;
--accent:#5b5bf7;--accent2:#8b5cf6;--pink:#ec4899;--danger:#e5484d;--ok:#12a150;--radius:18px;
--shadow:0 1px 2px rgba(16,24,40,.04),0 10px 28px -8px rgba(16,24,40,.10)}
@media (prefers-color-scheme:dark){:root{--bg:#0c0e16;--surface:#151826;--surface2:#1d2132;--text:#eef0f6;
--muted:#9aa3b5;--border:#272c3f;--shadow:0 1px 2px rgba(0,0,0,.3),0 10px 28px -8px rgba(0,0,0,.45)}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.6 Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);
color:var(--text);min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
h1,h2,h3{letter-spacing:-.02em;line-height:1.15}
.ic{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
.wrap{width:100%;max-width:1140px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
form{margin:0}

/* header */
.top{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 82%,transparent);
backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--border)}
.top .wrap{display:flex;align-items:center;gap:24px;min-height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--text);white-space:nowrap}
.logo i{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;color:#fff;
background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 6px 16px -6px var(--accent)}
.tabs{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs a{display:flex;align-items:center;gap:7px;padding:8px 14px;border-radius:999px;color:var(--muted);font-weight:550;white-space:nowrap;transition:.15s}
.tabs a .ic{width:17px;height:17px}
.tabs a:hover{color:var(--text);background:var(--surface2)}
.tabs a.on{color:var(--accent);background:color-mix(in srgb,var(--accent) 11%,transparent)}
.side{margin-left:auto;display:flex;gap:10px;align-items:center}
.who{display:flex;align-items:center;gap:8px;color:var(--muted);font-weight:550;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.who .ic{width:18px;height:18px}
@media (max-width:820px){.top .wrap{flex-wrap:wrap;gap:8px 16px;padding-top:10px;padding-bottom:8px}
.tabs{order:3;width:100%;margin:0 -6px}.who{display:none}}

/* buttons and inputs */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:12px;
border:1px solid transparent;font:inherit;font-weight:600;cursor:pointer;color:#fff;white-space:nowrap;
background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 8px 20px -8px var(--accent);
transition:transform .15s,box-shadow .15s,background .15s,color .15s}
.btn:hover{transform:translateY(-1px);box-shadow:0 12px 24px -8px var(--accent)}
.btn:active{transform:none}
.btn.ghost{background:var(--surface);color:var(--text);border-color:var(--border);box-shadow:none}
.btn.ghost:hover{background:var(--surface2)}
.btn.danger{background:transparent;color:var(--danger);border-color:color-mix(in srgb,var(--danger) 35%,transparent);box-shadow:none}
.btn.danger:hover{background:color-mix(in srgb,var(--danger) 10%,transparent)}
.btn.lg{padding:14px 26px;font-size:17px;border-radius:14px}
.btn.sm{padding:7px 12px;font-size:14px;border-radius:10px}
.btn.sm .ic{width:17px;height:17px}
.btn.icon{padding:9px}
.btn.done{background:var(--ok)!important;color:#fff!important;border-color:transparent}
.btn[disabled]{opacity:.65;pointer-events:none}
.field{display:flex;flex-direction:column;gap:6px;font-weight:550;font-size:14px}
.field small{font-weight:400;color:var(--muted)}
.input{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:12px;background:var(--surface);
color:var(--text);font:inherit;font-size:16px;transition:border-color .15s,box-shadow .15s}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 18%,transparent)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}

main{flex:1;position:relative;padding:36px 0 72px}
.glow{position:absolute;inset:-120px 0 auto 0;height:720px;z-index:-1;pointer-events:none;
background:radial-gradient(620px 320px at 78% 30%,color-mix(in srgb,var(--accent2) 26%,transparent),transparent 70%),
radial-gradient(520px 300px at 15% 10%,color-mix(in srgb,var(--accent) 22%,transparent),transparent 70%),
radial-gradient(420px 260px at 55% 75%,color-mix(in srgb,var(--pink) 12%,transparent),transparent 70%)}

/* landing */
.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center;padding:28px 0 72px}
.badge{display:inline-flex;gap:8px;align-items:center;padding:6px 14px;border-radius:999px;font-weight:600;font-size:14px;
color:var(--accent);background:color-mix(in srgb,var(--accent) 11%,var(--surface));border:1px solid color-mix(in srgb,var(--accent) 22%,transparent)}
.badge .ic{width:16px;height:16px}
.hero h1{font-size:clamp(38px,5.4vw,62px);margin:20px 0 18px;font-weight:800}
.grad{background:linear-gradient(120deg,var(--accent),var(--accent2) 55%,var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:19px;color:var(--muted);max-width:540px;margin:0}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
.trust{display:flex;gap:22px;flex-wrap:wrap;margin-top:28px;color:var(--muted);font-size:15px}
.trust span{display:flex;align-items:center;gap:7px}.trust .ic{width:18px;height:18px;color:var(--ok)}
.mock{position:relative;padding:18px;border-radius:26px;background:var(--surface);border:1px solid var(--border);
box-shadow:0 40px 80px -30px rgba(70,55,200,.45);transform:rotate(1.5deg)}
.mock-bar{display:flex;gap:6px;margin-bottom:14px}.mock-bar span{width:11px;height:11px;border-radius:50%;background:var(--border)}
.mock-bar span:nth-child(1){background:#ff5f57}.mock-bar span:nth-child(2){background:#febc2e}.mock-bar span:nth-child(3){background:#28c840}
.mock-title{display:flex;align-items:center;gap:8px;font-weight:700;margin-bottom:14px}
.mock-title .ic{color:var(--accent)}.mock-title small{margin-left:auto;color:var(--muted);font-weight:500}
.mock-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.mock-grid div{aspect-ratio:1;border-radius:14px;position:relative;overflow:hidden}
.mock-grid div::after{content:"";position:absolute;left:-10%;right:-10%;bottom:-30%;height:60%;border-radius:50% 50% 0 0;background:rgba(255,255,255,.28)}
.mock-grid div:nth-child(1){background:linear-gradient(135deg,#ff9a8b,#ff6a88)}
.mock-grid div:nth-child(2){background:linear-gradient(135deg,#a1c4fd,#6f86ff)}
.mock-grid div:nth-child(3){background:linear-gradient(135deg,#fbc2eb,#a18cd1)}
.mock-grid div:nth-child(4){background:linear-gradient(135deg,#84fab0,#3fb7d9)}
.mock-grid div:nth-child(5){background:linear-gradient(135deg,#f6d365,#fd8f65)}
.mock-grid div:nth-child(6){background:linear-gradient(135deg,#667eea,#764ba2)}
.mock-link{position:absolute;left:-28px;bottom:34px;display:flex;gap:10px;align-items:center;padding:12px 16px;border-radius:14px;
background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);font-size:14px;font-weight:600;transform:rotate(-3deg)}
.mock-link .ic{color:#fff;background:var(--ok);border-radius:50%;padding:4px;width:26px;height:26px}
.mock-up{position:absolute;right:-18px;top:46px;display:flex;gap:10px;align-items:center;padding:10px 14px;border-radius:14px;
background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);font-size:14px;font-weight:600;transform:rotate(2deg)}
.mock-up .ic{color:var(--accent)}
.section{padding:64px 0 24px}
.section h2{font-size:clamp(28px,3.6vw,40px);margin:0 0 10px;text-align:center}
.sub{color:var(--muted);text-align:center;margin:0 auto 40px;max-width:580px;font-size:17px}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature{transition:transform .2s,box-shadow .2s}
.feature:hover{transform:translateY(-4px);box-shadow:0 20px 40px -18px rgba(70,55,200,.35)}
.fi{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;margin-bottom:16px;color:#fff;
background:linear-gradient(135deg,var(--accent),var(--accent2))}
.feature h3,.step h3{margin:0 0 6px;font-size:19px}.feature p,.step p{margin:0;color:var(--muted)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s}
.step::before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:42px;height:42px;border-radius:50%;
margin-bottom:16px;font-weight:800;font-size:18px;color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}
.banner{margin-top:72px;padding:56px 32px;border-radius:28px;text-align:center;color:#fff;position:relative;overflow:hidden;
background:linear-gradient(120deg,var(--accent),var(--accent2) 55%,var(--pink))}
.banner::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.08);top:-200px;right:-120px}
.banner h2{font-size:clamp(26px,3.4vw,38px);margin:0 0 10px;position:relative}
.banner p{margin:0 0 26px;opacity:.9;font-size:17px;position:relative}
.banner .btn{background:#fff;color:#3b2fd0;box-shadow:0 12px 30px -10px rgba(0,0,0,.35);position:relative}
@media (max-width:920px){.hero{grid-template-columns:1fr;gap:40px}.features,.steps{grid-template-columns:1fr 1fr}.mock{max-width:520px;margin:0 auto}}
@media (max-width:620px){.features,.steps{grid-template-columns:1fr}.mock-link{left:10px;bottom:-18px}.mock-up{right:10px;top:-18px}.banner{padding:44px 22px}}

/* page header */
.ph{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:24px}
.ph h1{margin:0;font-size:clamp(26px,3.4vw,34px);word-break:break-word}
.ph p{margin:6px 0 0;color:var(--muted)}
.back{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-weight:550;margin-bottom:14px}
.back:hover{color:var(--text)}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.newf{display:flex;gap:10px;flex-wrap:wrap}.newf .input{width:280px;max-width:100%}

/* auth */
.auth{max-width:440px;margin:12px auto}
.auth .card{padding:32px}
.auth h1{text-align:center;margin:0 0 6px;font-size:30px}
.auth .sub{margin-bottom:26px;font-size:16px}
.auth form{display:flex;flex-direction:column;gap:16px}
.auth .btn{width:100%;margin-top:4px}
.auth .alt{text-align:center;margin-top:20px;color:var(--muted)}
.auth .logo-big{display:grid;place-items:center;width:56px;height:56px;margin:0 auto 18px;border-radius:16px;color:#fff;
background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 10px 24px -8px var(--accent)}
.auth .logo-big .ic{width:28px;height:28px}

/* quota */
.quota{display:flex;align-items:center;gap:16px;padding:16px 20px;margin-bottom:24px}
.quota>.ic{color:var(--accent)}
.bar{flex:1;height:9px;background:var(--surface2);border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.quota small{color:var(--muted);white-space:nowrap}

/* folders */
.folders{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:18px}
.fcard{display:block;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
overflow:hidden;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s}
.fcard:hover{transform:translateY(-4px);box-shadow:0 20px 40px -18px rgba(70,55,200,.4)}
.fcover{aspect-ratio:16/10;display:grid;place-items:center;color:var(--accent);
background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 16%,var(--surface2)),color-mix(in srgb,var(--pink) 12%,var(--surface2)))}
.fcover img{width:100%;height:100%;object-fit:cover;display:block}
.fcover .ic{width:44px;height:44px;stroke-width:1.5}
.fmeta{padding:14px 16px}
.fmeta b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fmeta small{color:var(--muted)}
.empty{text-align:center;padding:60px 24px;color:var(--muted)}
.empty .ic{width:52px;height:52px;stroke-width:1.5;color:var(--accent);margin-bottom:10px}
.empty b{display:block;color:var(--text);font-size:19px;margin-bottom:4px}

/* folder page */
.sharecard{margin-bottom:20px}
.sh-head{display:flex;gap:14px;align-items:center;margin-bottom:14px}
.sh-head>.ic{width:42px;height:42px;padding:10px;border-radius:12px;color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}
.sh-head b{display:block}.sh-head small{color:var(--muted)}
.share{display:flex;gap:10px}
.share .input{flex:1;min-width:0;font-family:ui-monospace,"Cascadia Mono",Consolas,monospace;font-size:14px}
.upload{margin-bottom:28px}
.drop{position:relative;display:flex;flex-direction:column;align-items:center;gap:6px;padding:36px 24px;text-align:center;
border:2px dashed color-mix(in srgb,var(--accent) 35%,var(--border));border-radius:var(--radius);
background:color-mix(in srgb,var(--accent) 3%,var(--surface));cursor:pointer;transition:border-color .15s,background .15s}
.drop:hover,.drop.over{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,var(--surface))}
.drop input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}
.drop>.ic{width:40px;height:40px;color:var(--accent);margin-bottom:4px}
.drop b{font-size:18px}.drop small{color:var(--muted)}
.drop .picked{font-weight:600;color:var(--accent)}
.upbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:12px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px}
.tile{position:relative;border-radius:16px;overflow:hidden;background:var(--surface2);aspect-ratio:1;box-shadow:var(--shadow)}
.tile>a{display:block;width:100%;height:100%}
.tile img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s}
.tile:hover img{transform:scale(1.05)}
.tile-actions{position:absolute;left:0;right:0;bottom:0;display:flex;gap:6px;justify-content:flex-end;padding:10px;
background:linear-gradient(transparent,rgba(0,0,0,.6));opacity:0;transition:opacity .18s}
.tile:hover .tile-actions,.tile:focus-within .tile-actions{opacity:1}
@media (hover:none){.tile-actions{opacity:1}}
.tile-actions .btn{background:rgba(255,255,255,.94);color:#151826;border:0;box-shadow:none;padding:8px}
.tile-actions .btn .ic{width:17px;height:17px}
.tile-actions .btn.danger{color:var(--danger)}
.tile-actions .btn:hover{background:#fff}

/* help */
.narrow{max-width:780px;margin:0 auto}
.subtabs{display:flex;gap:6px;justify-content:center;margin:0 0 28px}
.subtabs a{padding:8px 16px;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-weight:550}
.subtabs a:hover{border-color:var(--accent);color:var(--accent)}
details{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:2px 20px;margin-bottom:10px;transition:border-color .15s}
details[open]{border-color:color-mix(in srgb,var(--accent) 40%,var(--border))}
summary{cursor:pointer;font-weight:600;padding:16px 0;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--accent);font-size:24px;line-height:1;font-weight:400}
details[open] summary::after{content:"\2212"}
details p{margin:0 0 18px;color:var(--muted)}
.rules{padding:28px 32px}.rules h2{margin-top:0}
.rules ul{margin:0;padding-left:20px}.rules li{margin-bottom:8px}.rules li::marker{color:var(--accent)}
h2.center{text-align:center;font-size:clamp(24px,3vw,32px);margin:48px 0 20px}

/* account */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:20px}
.stat{display:flex;align-items:center;gap:16px}
.stat>.ic{width:46px;height:46px;padding:11px;border-radius:13px;color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}
.stat small{color:var(--muted);display:block}.stat b{font-size:26px;letter-spacing:-.02em}
.two{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.two h3{margin:0 0 16px}
.two form{display:flex;flex-direction:column;gap:14px}
.kv{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}
.kv:last-of-type{border-bottom:0}.kv span{color:var(--muted)}.kv b{word-break:break-all}
@media (max-width:760px){.two,.stats{grid-template-columns:1fr}}

/* toasts, footer, lightbox */
.toasts{position:fixed;top:80px;right:20px;z-index:60;display:flex;flex-direction:column;gap:10px;max-width:min(380px,calc(100vw - 40px))}
.toast{padding:13px 16px 13px 18px;border-radius:14px;background:var(--surface);border:1px solid var(--border);
box-shadow:0 14px 34px -12px rgba(16,24,40,.35);border-left:4px solid var(--ok);animation:tin .28s ease-out;transition:opacity .3s,transform .3s}
.toast.err{border-left-color:var(--danger)}
.toast.out{opacity:0;transform:translateX(20px)}
@keyframes tin{from{opacity:0;transform:translateY(-10px)}}
footer{border-top:1px solid var(--border);padding:28px 0;color:var(--muted);font-size:14px}
footer .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
footer nav{display:flex;gap:18px}footer a{color:var(--muted)}footer a:hover{color:var(--text)}
.lb{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;
background:rgba(8,10,18,.94);animation:fade .2s}
@keyframes fade{from{opacity:0}}
.lb img{max-width:92vw;max-height:84vh;border-radius:10px;box-shadow:0 30px 80px rgba(0,0,0,.6);user-select:none}
.lb button{position:absolute;display:grid;place-items:center;width:48px;height:48px;border:0;border-radius:50%;cursor:pointer;
background:rgba(255,255,255,.12);color:#fff;font-size:26px;line-height:1;transition:background .15s}
.lb button:hover{background:rgba(255,255,255,.25)}
.lb .x{top:18px;right:18px}.lb .prev{left:18px}.lb .next{right:18px}
.lb .lbbar{position:absolute;bottom:18px;left:0;right:0;display:flex;justify-content:center;gap:20px;color:#cfd3dc;font-size:14px}
.lb .lbbar a{color:#fff;font-weight:600}