/* ============================================================
   Flash Tether v3 — design system (dark crypto, RTL-aware)
   ============================================================ */
:root{
  --bg:#0b1220; --bg2:#0e1830; --card:#121b31; --card2:#16213c;
  --line:#233252; --line2:#2c3e66;
  --txt:#e6edf7; --mut:#93a4c3; --mut2:#6b7d9e;
  --acc:#4da3ff; --acc2:#2f7fe8; --gold:#ffc44d;
  --ok:#2ecc71; --bad:#ff5c69; --warn:#ffb84d;
  --r:14px; --shadow:0 10px 30px rgba(2,8,20,.45);
  --grad:linear-gradient(135deg,#4da3ff 0%,#7c5cff 100%);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",Tahoma,system-ui,-apple-system,Arial,sans-serif;background:var(--bg);color:var(--txt);font-size:15.5px;line-height:1.6}
img,svg{max-width:100%}
a{color:var(--acc);text-decoration:none}a:hover{text-decoration:none}
.container{max-width:1160px;margin-inline:auto;padding-inline:20px}
.skip{position:absolute;inset-inline-start:-9999px}.skip:focus{inset-inline-start:8px;top:8px;background:var(--card);padding:8px 14px;border-radius:8px;z-index:99}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:11px;border:1px solid transparent;font-weight:700;font-size:14.5px;cursor:pointer;transition:.18s;line-height:1.2}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 6px 18px rgba(77,131,255,.35)}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.08)}
.btn-ghost{border-color:var(--line2);color:var(--txt);background:transparent}
.btn-ghost:hover{border-color:var(--acc);color:var(--acc)}
.btn-ok{background:rgba(46,204,113,.14);color:var(--ok);border-color:rgba(46,204,113,.4)}
.btn-bad{background:rgba(255,92,105,.12);color:var(--bad);border-color:rgba(255,92,105,.4)}
.btn-sm{padding:8px 14px;font-size:13px;border-radius:9px}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* badges & alerts */
.badge{display:inline-block;padding:3px 10px;border-radius:99px;font-size:12px;font-weight:700}
.badge-ok{background:rgba(46,204,113,.14);color:var(--ok)}
.badge-warn{background:rgba(255,184,77,.14);color:var(--warn)}
.badge-bad{background:rgba(255,92,105,.14);color:var(--bad)}
.badge-mut{background:rgba(147,164,195,.14);color:var(--mut)}
.alert{padding:13px 16px;border-radius:11px;margin:0 0 16px;font-size:14px}
.alert-ok{background:rgba(46,204,113,.1);border:1px solid rgba(46,204,113,.35);color:#9fe8c3}
.alert-err{background:rgba(255,92,105,.1);border:1px solid rgba(255,92,105,.35);color:#ffb3ba}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,18,32,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;gap:22px;height:68px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;color:var(--txt)}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--grad);color:#fff;font-size:17px}
.brand-name em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.nav{display:flex;gap:20px;margin-inline-start:12px}
.nav a{color:var(--mut);font-weight:600;font-size:14px}.nav a:hover{color:var(--txt)}
.nav-actions{margin-inline-start:auto;display:flex;align-items:center;gap:10px}
.lang-switch{display:flex;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:3px;gap:2px}
.lang-link{padding:5px 10px;border-radius:7px;font-size:12.5px;font-weight:700;color:var(--mut)}
.lang-link.on{background:var(--grad);color:#fff}
.nav-burger{display:none;background:none;border:0;cursor:pointer;padding:6px}
.nav-burger span{display:block;width:22px;height:2px;background:var(--txt);margin:5px 0;border-radius:2px;transition:.2s}

/* hero */
.hero{position:relative;overflow:hidden;padding:96px 0 80px;
  background:radial-gradient(900px 480px at 85% -10%,rgba(124,92,255,.22),transparent 60%),
             radial-gradient(700px 420px at 10% 110%,rgba(77,163,255,.16),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-badge{display:inline-block;padding:7px 16px;border-radius:99px;border:1px solid var(--line2);background:var(--card);color:var(--mut);font-size:13px;font-weight:700;margin-bottom:22px}
.hero h1{font-size:clamp(34px,5.4vw,58px);line-height:1.12;margin:0 0 18px;font-weight:800;letter-spacing:-.5px}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.lead{color:var(--mut);font-size:17.5px;max-width:56ch;margin:0 0 30px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual{position:relative;display:grid;place-items:center;min-height:320px}
.coin-orbit{position:relative;width:300px;height:300px}
.coin{position:absolute;display:grid;place-items:center;border-radius:50%;box-shadow:var(--shadow);animation:float 6s ease-in-out infinite}
.coin.c1{width:118px;height:118px;background:radial-gradient(circle at 30% 30%,#26a17b,#0d8a63);top:0;left:50%;transform:translateX(-50%);animation-delay:0s}
.coin.c2{width:86px;height:86px;background:radial-gradient(circle at 30% 30%,#f7931a,#c26f07);bottom:24px;inset-inline-start:8%;animation-delay:1.2s}
.coin.c3{width:74px;height:74px;background:radial-gradient(circle at 30% 30%,#627eea,#3c56c0);bottom:24px;inset-inline-end:8%;animation-delay:2.4s}
.coin span{color:#fff;font-weight:800;font-size:15px;text-shadow:0 2px 6px rgba(0,0,0,.4)}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}
.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:54px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;text-align:center}
.stat b{display:block;font-size:26px;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat span{color:var(--mut);font-size:13px}

/* sections */
.section{padding:76px 0}
.section-head{text-align:center;max-width:640px;margin:0 auto 44px}
.section-head h2{font-size:clamp(26px,3.4vw,36px);margin:0 0 10px;letter-spacing:-.4px}
.section-head p{color:var(--mut);margin:0}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px}
.card h3{margin:12px 0 8px;font-size:18px}
.card p{color:var(--mut);margin:0;font-size:14.5px}
.f-ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:rgba(77,163,255,.12);color:var(--acc);font-size:21px}
.step-num{width:38px;height:38px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:12px}

/* rates table */
.rates-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.table-wrap{overflow-x:auto}
table.rates{width:100%;border-collapse:collapse;min-width:640px}
table.rates th,table.rates td{padding:14px 18px;text-align:start;border-bottom:1px solid var(--line);font-size:14.5px;white-space:nowrap}
table.rates th{color:var(--mut);font-size:12.5px;text-transform:uppercase;letter-spacing:.6px;background:var(--bg2)}
table.rates tr:last-child td{border-bottom:0}
.coin-cell{display:flex;align-items:center;gap:12px}
.coin-ico{width:34px;height:34px;border-radius:50%;flex:none;background:var(--bg2);display:grid;place-items:center;overflow:hidden}
.coin-ico img{width:100%;height:100%;object-fit:contain}
.coin-cell b{display:block;line-height:1.2}
.coin-cell small{color:var(--mut2);font-size:12px}
.price-cell b{color:var(--txt)}.delta{font-size:12px;color:var(--ok)}

/* faq */
details.faq{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin-bottom:12px}
details.faq summary{cursor:pointer;font-weight:700;font-size:15.5px;list-style:none;display:flex;justify-content:space-between;gap:12px}
details.faq summary::after{content:"+";color:var(--acc);font-weight:800;font-size:18px}
details.faq[open] summary::after{content:"−"}
details.faq p{color:var(--mut);margin:12px 0 0;font-size:14.5px}

/* footer */
.site-footer{border-top:1px solid var(--line);background:var(--bg2);padding:54px 0 0;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px;padding-bottom:38px}
.footer-grid h4{font-size:14px;text-transform:uppercase;letter-spacing:.8px;color:var(--mut2);margin:0 0 14px}
.footer-grid a{display:block;color:var(--mut);padding:4px 0;font-size:14px}
.footer-grid a:hover{color:var(--txt)}
.footer-about p{color:var(--mut);font-size:13.5px;max-width:44ch;margin:12px 0 0}
.footer-bottom{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:18px 20px;border-top:1px solid var(--line);color:var(--mut2);font-size:12.5px}

/* ============ panels ============ */
.panel-shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh}
.sidebar{background:var(--bg2);border-inline-end:1px solid var(--line);padding:22px 16px;display:flex;flex-direction:column;gap:20px;position:sticky;top:0;height:100vh;overflow-y:auto}
.side-nav{display:flex;flex-direction:column;gap:3px}
.side-nav a{display:flex;align-items:center;gap:11px;padding:10.5px 13px;border-radius:10px;color:var(--mut);font-weight:600;font-size:14px}
.side-nav a span{width:20px;text-align:center;opacity:.75}
.side-nav a:hover{background:var(--card);color:var(--txt)}
.side-nav a.on{background:rgba(77,163,255,.13);color:var(--acc)}
.side-lang{margin-top:auto;display:grid;grid-template-columns:1fr 1fr;gap:6px}
.panel-main{padding:0 26px 40px;min-width:0}
.panel-top{display:flex;align-items:center;gap:16px;padding:20px 0 22px;border-bottom:1px solid var(--line);margin-bottom:24px}
.panel-title{font-size:21px;margin:0;font-weight:800}
.panel-user{margin-inline-start:auto;display:flex;align-items:center;gap:10px}
.panel-content{max-width:1060px}

/* cards & grids inside panels */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid-3p{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.bal-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.bal-card .lbl{color:var(--mut);font-size:12.5px;text-transform:uppercase;letter-spacing:.6px}
.bal-card .val{font-size:24px;font-weight:800;margin-top:6px}
.bal-card .val small{font-size:13px;color:var(--mut2);font-weight:600}
.mini-bals{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.mini-bal{background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:8px 12px;font-size:12.5px}
.mini-bal b{color:var(--acc)}

/* forms */
.form{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--mut);margin-bottom:7px;font-weight:600}
.field input,.field select,.field textarea{width:100%;padding:11.5px 14px;border-radius:10px;border:1px solid var(--line);background:var(--bg2);color:var(--txt);font-size:14.5px;font-family:inherit}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--acc);box-shadow:0 0 0 3px rgba(77,163,255,.15)}
.field .hint{font-size:12px;color:var(--mut2);margin-top:5px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.captcha-row{display:flex;gap:10px;align-items:center}
.captcha-row svg{border-radius:8px;flex:none}
.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:26px;background:radial-gradient(900px 500px at 80% -10%,rgba(124,92,255,.2),transparent 60%),radial-gradient(700px 420px at 8% 110%,rgba(77,163,255,.14),transparent 60%)}
.auth-card{width:100%;max-width:440px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:34px;box-shadow:var(--shadow)}
.auth-card h1{font-size:23px;margin:0 0 6px}
.auth-card .sub{color:var(--mut);font-size:14px;margin:0 0 22px}
.auth-alt{text-align:center;color:var(--mut);font-size:13.5px;margin-top:18px}
.brand-center{display:flex;justify-content:center;margin-bottom:20px}

/* tables in panels */
.tbl{width:100%;border-collapse:collapse}
.tbl th,.tbl td{padding:12px 14px;text-align:start;border-bottom:1px solid var(--line);font-size:14px}
.tbl th{color:var(--mut);font-size:12px;text-transform:uppercase;letter-spacing:.6px;background:var(--bg2);white-space:nowrap}
.tbl td{vertical-align:middle}
.tbl-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:var(--r)}
.tbl-wrap .pad{padding:18px}
.mono{font-family:ui-monospace,Consolas,monospace;font-size:12.8px;direction:ltr;unicode-bidi:embed}

/* wallet / QR */
.wallet-card{display:grid;grid-template-columns:1fr 150px;gap:20px}
.qr-box{background:#fff;border-radius:12px;padding:10px;display:grid;place-items:center}
.qr-box img{width:100%;height:auto;display:block}
.addr-row{display:flex;gap:8px;align-items:center;background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:9px 12px}
.addr-row .mono{flex:1;overflow-x:auto;white-space:nowrap}
.copy-btn{flex:none}
.tabs{display:flex;gap:8px;margin-bottom:20px;background:var(--card);border:1px solid var(--line);padding:5px;border-radius:12px;width:max-content}
.tabs a,.tabs button{padding:9px 22px;border-radius:9px;border:0;background:transparent;color:var(--mut);font-weight:700;font-size:14px;cursor:pointer}
.tabs .on{background:var(--grad);color:#fff}
.trade-preview{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:16px;margin-top:8px}
.trade-preview .row{display:flex;justify-content:space-between;padding:6px 0;font-size:14px}
.trade-preview .row span{color:var(--mut)}
.trade-preview .row b{font-variant-numeric:tabular-nums}

/* chat */
.chat-fab{position:fixed;inset-inline-end:22px;bottom:22px;width:56px;height:56px;border-radius:50%;background:var(--grad);color:#fff;border:0;cursor:pointer;display:grid;place-items:center;box-shadow:var(--shadow);z-index:60;transition:.2s}
.chat-fab:hover{transform:scale(1.07)}
.chat-modal{position:fixed;inset:0;background:rgba(4,8,18,.6);backdrop-filter:blur(3px);display:grid;place-items:center;z-index:70;padding:18px}
.chat-modal[hidden]{display:none}
.chat-box{width:100%;max-width:400px;background:var(--card);border:1px solid var(--line2);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;max-height:80vh}
.chat-head{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;background:var(--bg2);border-bottom:1px solid var(--line)}
.chat-x{background:none;border:0;color:var(--mut);font-size:22px;cursor:pointer;line-height:1}
.chat-gate{padding:20px;display:flex;flex-direction:column;gap:10px}
.chat-gate p{color:var(--mut);font-size:13.5px;margin:0 0 4px}
.chat-gate input{padding:11px 13px;border-radius:10px;border:1px solid var(--line);background:var(--bg2);color:var(--txt)}
.chat-body{display:flex;flex-direction:column;min-height:0}
.chat-msgs{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:9px;min-height:260px;max-height:420px}
.msg{max-width:82%;padding:9px 13px;border-radius:13px;font-size:13.8px;line-height:1.45}
.msg.guest,.msg.user{align-self:flex-end;background:var(--grad);color:#fff;border-end-end-radius:4px}
.msg.admin{align-self:flex-start;background:var(--bg2);border:1px solid var(--line);border-end-start-radius:4px}
.chat-form{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line)}
.chat-form input{flex:1;padding:10px 13px;border-radius:10px;border:1px solid var(--line);background:var(--bg2);color:var(--txt)}
.panel-chat{display:grid;grid-template-columns:300px 1fr;gap:16px;min-height:60vh}
.chat-list{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow-y:auto;max-height:70vh}
.chat-list a{display:block;padding:13px 15px;border-bottom:1px solid var(--line);color:var(--txt)}
.chat-list a.on,.chat-list a:hover{background:var(--bg2)}
.chat-list small{display:block;color:var(--mut2);font-size:12px}
.chat-pane{background:var(--card);border:1px solid var(--line);border-radius:var(--r);display:flex;flex-direction:column;min-height:0}
.chat-pane .chat-msgs{max-height:none;flex:1}

/* ticker popup */
.ticker-pop{position:fixed;inset-inline-start:20px;bottom:20px;z-index:65;background:var(--card);border:1px solid var(--line2);border-radius:14px;padding:13px 16px;display:flex;gap:12px;align-items:center;box-shadow:var(--shadow);animation:slideup .4s ease}
.ticker-ico{width:40px;height:40px;border-radius:10px;background:rgba(46,204,113,.15);display:grid;place-items:center;font-size:18px}
.ticker-txt{display:flex;flex-direction:column;font-size:13px}
.ticker-txt span{color:var(--mut);font-size:12px}
@keyframes slideup{from{transform:translateY(16px);opacity:0}to{transform:translateY(0);opacity:1}}

/* reveal on scroll (progressive enhancement) */
:where(html.js) .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
:where(html.js) .reveal.in{opacity:1;transform:none}

/* ============ responsive ============ */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero{padding:64px 0 56px;text-align:center}
  .hero-cta{justify-content:center}
  .hero-visual{display:none}
  .stats-strip{grid-template-columns:repeat(2,1fr)}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .panel-shell{grid-template-columns:1fr}
  .sidebar{position:fixed;inset-block:0;inset-inline-start:-280px;width:270px;z-index:80;transition:inset-inline-start .25s ease}
  .sidebar.open{inset-inline-start:0}
  .panel-main{padding:0 16px 32px}
  .grid-2,.grid-3p{grid-template-columns:1fr}
  .panel-chat{grid-template-columns:1fr}
  .wallet-card{grid-template-columns:1fr}
  .nav{display:none}
  .nav.open{display:flex;position:absolute;top:68px;inset-inline:0;flex-direction:column;background:var(--bg2);border-bottom:1px solid var(--line);padding:18px 22px;gap:14px}
  .nav-burger{display:block}
}
@media (max-width:560px){
  body{font-size:14.5px}
  .grid-3,.grid-4{grid-template-columns:1fr}
  .stats-strip{grid-template-columns:1fr 1fr;gap:10px}
  .container{padding-inline:14px}
  .section{padding:52px 0}
  .field-row{grid-template-columns:1fr}
  .tabs{width:100%}.tabs a,.tabs button{flex:1;padding:9px 8px}
  .footer-grid{grid-template-columns:1fr}
  .lang-switch{flex-wrap:wrap}
  .hero h1{font-size:32px}
}

/* ============ RTL ============ */
[dir="rtl"] .mono{direction:ltr;unicode-bidi:embed}
[dir="rtl"] body{letter-spacing:0}
[dir="rtl"] .nav-burger span{margin:5px 0}
[dir="rtl"] .chat-fab{inset-inline:22px auto;inset-inline-end:22px}