/* CloudGram — modern dark theme. Single shared stylesheet for all pages. */
:root{
  --bg:#080a10; --bg2:#0b0e16;
  --surface:#10131d; --surface2:#161b29; --surface3:#1c2233;
  --border:#222a3d; --border2:#2c3650;
  --text:#eef1f8; --muted:#8b96b0; --faint:#5b6580;
  --brand:#3b82f6; --brand2:#8b5cf6; --cyan:#22d3ee; --green:#22c55e; --amber:#f59e0b; --red:#ef4444;
  --grad:linear-gradient(135deg,#3b82f6 0%,#6366f1 55%,#8b5cf6 100%);
  --grad-soft:linear-gradient(135deg,rgba(59,130,246,.14),rgba(139,92,246,.14));
  --ring:0 0 0 1px var(--border);
  --shadow:0 10px 30px -12px rgba(0,0,0,.7);
  --shadow-glow:0 8px 40px -8px rgba(59,130,246,.45);
  --radius:16px; --radius-sm:10px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 520px at 50% -8%,rgba(59,130,246,.16),transparent 60%),
    radial-gradient(700px 500px at 92% 8%,rgba(139,92,246,.12),transparent 55%);
  background-repeat:no-repeat;background-attachment:fixed;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
.grow{flex:1}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:40;background:rgba(8,10,16,.72);backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;gap:22px;height:64px}
.logo{display:flex;align-items:center;font-weight:800;font-size:20px;letter-spacing:-.02em}
.logo .mk{width:28px;height:28px;border-radius:8px;display:block;margin-right:9px}
.logo span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav a.link{color:var(--muted);font-size:14.5px;font-weight:500;transition:color .15s}
.nav a.link:hover{color:var(--text)}
.userbar{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted)}
.userbar b{color:var(--text)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--radius-sm);
  border:1px solid var(--border2);background:var(--surface2);color:var(--text);cursor:pointer;
  font-size:14px;font-weight:600;transition:transform .12s,border-color .15s,background .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px);border-color:var(--faint)}
.btn.primary{background:var(--grad);border:0;color:#fff;box-shadow:var(--shadow-glow)}
.btn.primary:hover{box-shadow:0 10px 46px -6px rgba(99,102,241,.6)}
.btn.ghost{background:transparent;border-color:var(--border)}
.btn.lg{padding:14px 28px;font-size:16px;border-radius:12px}
.btn.sm{padding:7px 12px;font-size:13px}
.btn svg{width:17px;height:17px}

.eyebrow{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:#a9b6d6;background:var(--grad-soft);border:1px solid var(--border2);padding:5px 12px;border-radius:999px;margin-bottom:18px}

/* ---------- hero ---------- */
.hero{padding:80px 0 72px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.02fr 1.18fr;gap:46px;align-items:center}
.hero-copy{text-align:left}
.hero h1{font-size:clamp(34px,4.6vw,54px);line-height:1.1;margin:0 0 18px;font-weight:800;letter-spacing:-.03em}
.hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:18px;color:var(--muted);max-width:560px;margin:0 0 30px}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap}
.hero .trust{margin-top:22px;color:var(--faint);font-size:13.5px}
.hero .trust b{color:var(--muted);font-weight:600}
.hero-visual{position:relative}
.hero-visual::before{content:"";position:absolute;inset:-8% -6% -12% -6%;border-radius:50%;
  background:radial-gradient(closest-side,rgba(99,102,241,.42),transparent 72%);filter:blur(8px);z-index:0}
.hero-visual img{position:relative;z-index:1;width:100%;height:auto;display:block;border-radius:14px;
  filter:drop-shadow(0 30px 60px rgba(0,0,0,.55))}

/* ---------- photographic band ---------- */
.band{position:relative;overflow:hidden;padding:84px 0;margin:8px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.band-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.45}
.band::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,10,16,.78),rgba(8,10,16,.62))}
.band-inner{position:relative;z-index:1;text-align:center}
.band-inner h2{font-size:clamp(26px,3.4vw,38px);margin:0 0 12px;font-weight:800;letter-spacing:-.02em}
.band-inner p{color:#c4cde2;max-width:640px;margin:0 auto 36px;font-size:16px}
.band-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:760px;margin:0 auto}
.band-stats .bs b{display:block;font-size:clamp(28px,4vw,42px);font-weight:800;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.1}
.band-stats .bs span{color:var(--muted);font-size:13.5px}

/* ---------- split (image + text) ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.split .shot{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border2);box-shadow:var(--shadow);position:relative}
.split .shot img{width:100%;height:100%;display:block;object-fit:cover;aspect-ratio:4/3}
.split h2{text-align:left;font-size:clamp(24px,3vw,32px);margin:0 0 14px}
.split .lead{text-align:left;margin:0 0 20px}
.split ul{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.split li{display:flex;gap:12px;align-items:flex-start;color:#c4cde2;font-size:15px}
.split li svg{width:20px;height:20px;color:var(--green);flex:none;margin-top:2px}
.split li b{color:var(--text);font-weight:700}

/* ---------- sections ---------- */
.section{padding:72px 0;position:relative}
.section.alt{background:linear-gradient(180deg,transparent,rgba(255,255,255,.012),transparent)}
.section h2{font-size:clamp(26px,3.4vw,36px);text-align:center;margin:0 0 10px;font-weight:800;letter-spacing:-.02em}
.section .lead{text-align:center;color:var(--muted);margin:0 auto 44px;max-width:600px;font-size:16px}

/* ---------- feature grid ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(252px,1fr));gap:18px}
.card{background:linear-gradient(180deg,var(--surface),var(--bg2));border:1px solid var(--border);
  border-radius:var(--radius);padding:26px 24px;transition:transform .16s,border-color .16s,box-shadow .16s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:linear-gradient(180deg,rgba(255,255,255,.06),transparent);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.card:hover{transform:translateY(-4px);border-color:var(--border2);box-shadow:var(--shadow)}
.card .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:var(--grad-soft);border:1px solid var(--border2);color:#9db4ff}
.card .ic svg{width:23px;height:23px}
.card h3{margin:0 0 7px;font-size:17px;font-weight:700}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.65}

/* ---------- supported drives ---------- */
.drive-logos{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:8px}
.drive-logos .dl{display:flex;flex-direction:column;align-items:center;gap:9px;width:96px;padding:16px 8px;
  background:var(--surface);border:1px solid var(--border);border-radius:14px;transition:transform .15s,border-color .15s}
.drive-logos .dl:hover{transform:translateY(-3px);border-color:var(--border2)}
.drive-logos .dl img{width:46px;height:46px;border-radius:11px;object-fit:cover}
.drive-logos .dl span{font-size:12.5px;color:var(--muted)}
.fine{text-align:center;margin-top:22px;font-size:13px;color:var(--faint)}
.fine a{color:var(--brand)}

/* ---------- how it works ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;counter-reset:s}
.step{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;position:relative}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-14px;left:22px;width:30px;height:30px;
  border-radius:9px;background:var(--grad);color:#fff;font-weight:800;font-size:15px;display:grid;place-items:center;box-shadow:var(--shadow-glow)}
.step h3{margin:10px 0 6px;font-size:16px}
.step p{margin:0;color:var(--muted);font-size:14px}

/* ---------- pricing ---------- */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(248px,1fr));gap:20px;max-width:880px;margin:0 auto}
.plan{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px 26px;text-align:center;position:relative;transition:transform .16s,border-color .16s}
.plan:hover{transform:translateY(-4px)}
.plan.hot{border-color:transparent;background:
  linear-gradient(var(--surface),var(--surface)) padding-box,var(--grad) border-box;box-shadow:var(--shadow-glow)}
.plan .tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12px;font-weight:700;padding:4px 14px;border-radius:999px}
.plan h3{font-size:18px;margin:0 0 6px;font-weight:700}
.price{font-size:42px;font-weight:800;margin:8px 0;letter-spacing:-.02em}
.price small{font-size:15px;color:var(--muted);font-weight:400}
.plan ul{list-style:none;padding:0;margin:18px 0;color:var(--muted);font-size:14px;text-align:left}
.plan li{padding:6px 0;display:flex;gap:9px;align-items:flex-start}
.plan li svg{width:17px;height:17px;color:var(--green);flex:none;margin-top:3px}
.plan .btn{width:100%;justify-content:center}

/* ---------- article pages ---------- */
.article{padding:56px 0;max-width:800px}
.article h1{font-size:36px;margin:0 0 10px;letter-spacing:-.02em}
.article .sub{color:var(--muted);margin:0 0 32px;font-size:17px}
.article h2{font-size:23px;margin:36px 0 12px;font-weight:700}
.article h3{font-size:17px;margin:22px 0 6px}
.article p,.article li{color:#c4cde2}
.article ul{padding-left:20px}
.article a{color:var(--brand)}
.faq{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px 20px;margin:12px 0}
.faq h3{margin:0 0 6px;font-size:16px}
.faq p{margin:0;color:var(--muted);font-size:14px}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--border);padding:40px 0;color:var(--muted);font-size:13.5px;margin-top:40px}
footer .frow{display:flex;flex-wrap:wrap;gap:18px;align-items:center}
footer a{color:var(--muted)}footer a:hover{color:var(--text)}

/* ---------- modal ---------- */
.modal-bg{position:fixed;inset:0;background:rgba(4,6,11,.66);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;z-index:60;padding:20px}
.modal-bg.show{display:flex}
.modal{background:var(--surface);border:1px solid var(--border2);border-radius:var(--radius);padding:26px;width:380px;max-width:100%;box-shadow:var(--shadow);max-height:90vh;overflow:auto}
.modal h3{margin:0 0 16px;font-size:18px}
.modal label{display:block;font-size:12.5px;color:var(--muted);margin:12px 0 5px}
.modal input,.modal select{width:100%;padding:11px;background:var(--surface2);border:1px solid var(--border);border-radius:9px;color:var(--text);font-size:14px}
.modal input:focus,.modal select:focus{outline:none;border-color:var(--brand)}
.modal .row{display:flex;gap:10px;margin-top:18px}
.tabs{display:flex;gap:6px;margin-bottom:8px;background:var(--surface2);padding:4px;border-radius:10px}
.tabs button{flex:1;background:none;border:none;color:var(--muted);padding:8px;cursor:pointer;border-radius:7px;font-size:14px;font-weight:600;transition:.15s}
.tabs button.on{color:var(--text);background:var(--surface3)}
.msg{font-size:13px;margin-top:10px;min-height:18px}
.msg.ok{color:var(--green)}.msg.err{color:var(--red)}

/* ---------- console dashboard ---------- */
.dash{padding:40px 0 64px;max-width:980px}
.dash-hero{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-bottom:26px}
.dash-hero h1{font-size:28px;margin:0 0 4px;letter-spacing:-.02em}
.dash-hero p{margin:0;color:var(--muted);font-size:14.5px}
.need-login{text-align:center;padding:80px 0;color:var(--muted)}
.need-login a{color:var(--brand)}

.acct-card{display:flex;align-items:center;gap:18px;flex-wrap:wrap;background:
  linear-gradient(135deg,rgba(59,130,246,.10),rgba(139,92,246,.08)),var(--surface);
  border:1px solid var(--border2);border-radius:var(--radius);padding:22px 24px;margin-bottom:26px}
.acct-card .avatar{width:52px;height:52px;border-radius:14px;background:var(--grad);display:grid;place-items:center;color:#fff;font-weight:800;font-size:22px;flex:none;box-shadow:var(--shadow-glow)}
.acct-meta{flex:1;min-width:180px}
.acct-meta .nm{font-size:18px;font-weight:700}
.acct-meta .tier{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:#cbd5ff;background:var(--grad-soft);border:1px solid var(--border2);padding:3px 10px;border-radius:999px;margin-top:5px}
.acct-stats{display:flex;gap:26px;flex-wrap:wrap}
.acct-stats .st{text-align:center}
.acct-stats .st b{display:block;font-size:20px;font-weight:800}
.acct-stats .st span{font-size:12px;color:var(--muted)}
.acct-actions{display:flex;gap:10px;flex-wrap:wrap}

.sec-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 14px}
.sec-head h2{font-size:18px;margin:0;font-weight:700}
.sec-head .hint{font-size:13px;color:var(--muted)}

.drive-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.drive-card{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px;transition:border-color .15s,transform .15s}
.drive-card:hover{border-color:var(--border2);transform:translateY(-2px)}
.drive-card .di{width:44px;height:44px;border-radius:11px;object-fit:cover;flex:none;background:var(--surface2)}
.drive-card .info{flex:1;min-width:0}
.drive-card .info .nm{font-weight:700;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.drive-card .info .ty{font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.drive-card .x{color:var(--faint);background:none;border:none;cursor:pointer;padding:6px;border-radius:8px;flex:none;transition:.15s}
.drive-card .x:hover{color:var(--red);background:rgba(239,68,68,.1)}
.drive-card .x svg{width:17px;height:17px;display:block}
.badge{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;padding:2px 8px;border-radius:999px;margin-top:5px}
.badge.on{color:#7ee2a8;background:rgba(34,197,94,.12)}
.badge .dot{width:6px;height:6px;border-radius:50%;background:currentColor}

.drive-card.add{justify-content:center;color:var(--muted);border-style:dashed;cursor:pointer;font-weight:600}
.drive-card.add:hover{color:var(--text);border-color:var(--brand)}
.drive-card.add svg{width:18px;height:18px}

.empty{text-align:center;padding:46px 20px;color:var(--muted);background:var(--surface);border:1px dashed var(--border2);border-radius:var(--radius)}
.empty svg{width:38px;height:38px;color:var(--faint);margin-bottom:10px}

.qr-panel{display:flex;gap:22px;align-items:center;flex-wrap:wrap;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px}
.qr-panel .qr-img{width:172px;height:172px;background:#fff;border-radius:12px;padding:8px;flex:none;display:grid;place-items:center}
.qr-panel .qr-img img{width:100%;height:100%;border-radius:6px}
.qr-panel .qr-txt{flex:1;min-width:200px}
.qr-panel .qr-txt h3{margin:0 0 6px;font-size:16px}
.qr-panel .qr-txt p{margin:0 0 14px;color:var(--muted);font-size:13.5px}

.frm{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.frm label{font-size:12px;color:var(--muted);margin-bottom:4px;display:block}
.frm input,.frm select{width:100%;padding:10px;background:var(--surface2);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:14px}
.frm input:focus,.frm select:focus{outline:none;border-color:var(--brand)}
.frm .full{grid-column:1/3}

@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-copy{text-align:center}
  .hero p{margin-left:auto;margin-right:auto}
  .hero .cta{justify-content:center}
  .hero-visual{max-width:560px;margin:0 auto}
  .split{grid-template-columns:1fr;gap:28px}
  .split h2,.split .lead{text-align:center}
  .split .shot{order:-1}
  .band-stats{grid-template-columns:repeat(2,1fr);gap:26px 20px}
}
@media(max-width:680px){
  .nav{gap:14px}.nav a.link{display:none}
  .acct-stats{gap:18px}
  .frm{grid-template-columns:1fr}.frm .full{grid-column:1}
}

/* ---------- data security ---------- */
.sec-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:18px;margin-top:8px}
.sec-item{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:22px 22px 20px}
.sec-item .t{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;margin-bottom:8px}
.sec-item .t svg{width:20px;height:20px;color:var(--green);flex:none}
.sec-item p{margin:0;color:var(--muted);font-size:14px;line-height:1.65}
.sec-note{margin-top:22px;background:var(--grad-soft);border:1px solid var(--border2);border-radius:12px;padding:15px 18px;color:#c4cde2;font-size:14px}
.sec-note a{color:var(--brand)}