/* ============================================================
   Finsol - design language inspired by FixedFloat (ff.io)
   Montserrat type, near-black #0C0D16, blue->cyan accent,
   white->light-blue gradient headings, glassy dark cards.
   ============================================================ */
:root {
  --bg: #0c0d16;
  --bg-soft: #11121d;
  --panel: rgba(255, 255, 255, .035);
  --panel-2: rgba(255, 255, 255, .06);
  --card: rgba(255, 255, 255, .035);
  --border: rgba(255, 255, 255, .09);
  --border-2: rgba(255, 255, 255, .16);
  --text: #ffffff;
  --muted: #808191;
  --muted-2: #a7a9bd;
  --accent: #018fdf;
  --accent-2: #00afd6;
  --accent-soft: rgba(1, 143, 223, .14);
  --green: #53ae94;
  --red: #ff6b81;
  --yellow: #ffc94d;
  --grad-head: linear-gradient(180deg, #ffffff 0%, #b1daff 100%);
  --grad-cta: linear-gradient(135deg, #018fdf 0%, #00afd6 100%);
  --radius: 16px;
  --radius-sm: 11px;
  --shadow: 0 24px 70px rgba(0, 0, 0, .5);
  --shadow-glow: 0 12px 34px rgba(1, 143, 223, .35);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Montserrat', 'Heebo', 'Segoe UI', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  /* subtle blue glow at the top, like ff.io */
  background-image:
    radial-gradient(900px 460px at 70% -8%, rgba(1, 143, 223, .16), transparent 60%),
    radial-gradient(700px 380px at 10% 0%, rgba(0, 175, 214, .08), transparent 55%);
  background-attachment: fixed;
}
.container { max-width: 1140px; margin: 0 auto; padding: 0 22px; }
.mono { font-family: 'JetBrains Mono', 'Consolas', 'Menlo', monospace; font-variant-numeric: tabular-nums; }
.small { font-size: .82em; word-break: break-all; }

/* ===== Header ===== */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(12, 13, 22, .72); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-size: 1.25rem; font-weight: 700; color: var(--text); text-decoration: none; letter-spacing: -.01em; }
.logo-mark { width: 30px; height: 30px; display: block; }
.nav { display: flex; align-items: center; gap: 8px; }
.nav a { color: var(--muted); text-decoration: none; font-size: .92rem; font-weight: 500; padding: 8px 12px; border-radius: 9px; transition: color .15s, background .15s; }
.nav a:hover { color: var(--text); background: var(--panel); }
.lang-btn, .link-btn {
  background: none; border: 1px solid var(--border); color: var(--muted-2);
  padding: 7px 13px; border-radius: 9px; cursor: pointer; font-size: .88rem; font-weight: 600;
  font-family: inherit; transition: border-color .15s, color .15s;
}
.link-btn { border-color: transparent; }
.lang-btn:hover, .link-btn:hover { color: var(--text); border-color: var(--border-2); }

/* ===== Hero (cosmic) ===== */
.hero { position: relative; padding: 56px 0 90px; overflow: hidden; isolation: isolate; }
.cosmos { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.cosmos-svg { width: 100%; height: 100%; display: block; }
.hero::after { /* blend the scene into the page below */
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 140px; z-index: -1;
  background: linear-gradient(180deg, transparent, var(--bg));
}
.hero-inner { display: flex; flex-direction: column; align-items: center; text-align: center; }
.hero-inner h1 {
  font-size: 3.1rem; line-height: 1.1; margin-bottom: 16px; font-weight: 800; letter-spacing: -.03em;
  background: var(--grad-head); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { color: var(--muted-2); font-size: 1.08rem; margin-bottom: 34px; max-width: 38em; }
.hero .exchange-card { width: 100%; max-width: 560px; }

/* ===== Cards ===== */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px;
  box-shadow: var(--shadow); backdrop-filter: blur(8px);
}
.exchange-card { position: relative; }
.exchange-card::before {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius); padding: 1px;
  background: linear-gradient(160deg, rgba(1, 143, 223, .5), rgba(255, 255, 255, .04) 40%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}

/* ===== Exchange widget ===== */
.rate-toggle { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 14px; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 13px; padding: 5px; }
.rate-opt {
  background: transparent; border: none; border-radius: 9px;
  color: var(--muted); padding: 9px 6px; cursor: pointer; text-align: center;
  display: flex; flex-direction: column; gap: 1px; font-size: .92rem; font-weight: 600;
  font-family: inherit; transition: background .18s, color .18s;
}
.rate-opt small { font-size: .7rem; font-weight: 500; opacity: .8; }
.rate-opt.active { color: var(--text); background: var(--accent-soft); box-shadow: inset 0 0 0 1px rgba(1, 143, 223, .4); }

.rate-explain {
  font-size: .8rem; color: var(--muted-2); line-height: 1.5;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 9px 13px; margin-bottom: 16px;
}
.rate-explain-link { color: var(--accent-2); text-decoration: none; white-space: nowrap; font-weight: 600; margin-inline-start: 4px; }
.rate-explain-link:hover { text-decoration: underline; }

.exchange-card { text-align: start; }
.field-group { margin-bottom: 6px; }
.field-group label { display: block; font-size: .8rem; color: var(--muted); margin-bottom: 7px; font-weight: 500; }

/* coin-themed currency field (Send / Receive) */
.ccy-field { --coin: var(--accent); }
.ccy-field > label { color: var(--coin); font-weight: 600; transition: color .25s; }
.amount-row {
  display: flex; align-items: stretch; background: var(--bg-soft);
  border: 1.5px solid var(--border);
  border-color: color-mix(in srgb, var(--coin) 62%, transparent);
  border-radius: var(--radius-sm); overflow: hidden; transition: border-color .25s, box-shadow .2s;
}
.amount-row:focus-within { border-color: var(--coin); box-shadow: 0 0 0 3px color-mix(in srgb, var(--coin) 20%, transparent); }
.amount-row input {
  flex: 1; min-width: 0; background: transparent; border: none; border-radius: 0;
  color: var(--text); font-size: 1.35rem; font-weight: 700;
  padding: 13px 15px; outline: none; font-variant-numeric: tabular-nums;
}
.ccy-field .amount-row input { color: var(--coin); }
.amount-row input::placeholder { color: var(--muted); -webkit-text-fill-color: var(--muted); }
.ccy-btn {
  display: flex; align-items: center; gap: 7px; background: rgba(255, 255, 255, .03);
  border: none; border-inline-start: 1px solid var(--border); border-radius: 0; color: var(--text);
  padding: 0 14px; cursor: pointer; font-size: 1rem; font-weight: 700; white-space: nowrap;
  font-family: inherit; transition: background .15s;
}
.ccy-btn:hover { background: rgba(255, 255, 255, .08); }
.ccy-btn img { width: 24px; height: 24px; border-radius: 50%; }
.ccy-btn .chev { color: var(--muted); font-size: .72rem; margin-inline-start: 1px; }
.ccy-net {
  font-size: .6rem; font-weight: 800; letter-spacing: .03em; line-height: 1; padding: 3px 6px;
  border-radius: 6px; text-transform: uppercase; white-space: nowrap;
  background: color-mix(in srgb, var(--coin) 24%, transparent); color: var(--coin);
}
.ccy-net:empty { display: none; }
.usd-val { font-size: .76rem; color: var(--muted); min-height: 16px; margin-top: 5px; font-variant-numeric: tabular-nums; }
.hint { font-size: .73rem; color: var(--muted); min-height: 16px; margin-top: 2px; }

.swap-btn {
  display: flex; align-items: center; justify-content: center; margin: 4px auto; background: var(--bg-soft); color: var(--accent-2);
  border: 1px solid var(--border); border-radius: 50%; width: 38px; height: 38px;
  cursor: pointer; font-size: 1.05rem; transition: transform .2s, border-color .15s, color .15s;
}
.swap-btn:hover { border-color: var(--accent); color: var(--accent); transform: rotate(180deg); }

#toAddress, .tag-input, #ccySearch, #refundAddress {
  width: 100%; background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text); padding: 12px 15px; font-size: .95rem; outline: none;
  font-family: inherit; transition: border-color .15s, box-shadow .15s;
}
#toAddress:focus, .tag-input:focus, #ccySearch:focus, #refundAddress:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.tag-input { margin-top: 8px; }

/* address field with paste button */
.address-row {
  display: flex; align-items: stretch; background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius-sm); overflow: hidden; transition: border-color .15s, box-shadow .15s;
}
.address-row:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.address-row #toAddress { flex: 1; min-width: 0; border: none; border-radius: 0; box-shadow: none; background: transparent; }
.paste-btn {
  display: flex; align-items: center; gap: 6px; border: none; border-inline-start: 1px solid var(--border);
  background: rgba(255, 255, 255, .03); color: var(--accent-2); padding: 0 15px; cursor: pointer;
  font-family: inherit; font-weight: 600; font-size: .88rem; white-space: nowrap; transition: background .15s, color .15s;
}
.paste-btn:hover { background: rgba(255, 255, 255, .08); color: var(--accent); }
.paste-btn svg { display: block; }

.pay-tip {
  display: flex; gap: 9px; align-items: flex-start;
  font-size: .8rem; color: var(--muted-2); line-height: 1.5; margin-top: 10px;
  background: rgba(83, 174, 148, .08); border: 1px solid rgba(83, 174, 148, .28);
  border-radius: var(--radius-sm); padding: 10px 13px;
}
.pay-tip-ico { flex-shrink: 0; color: var(--green); }
.pay-tip-ico svg { width: 18px; height: 18px; display: block; }

.rate-info { font-size: .85rem; color: var(--muted-2); min-height: 20px; margin: 10px 0 4px; font-variant-numeric: tabular-nums; }
.error-msg { color: var(--red); font-size: .86rem; min-height: 20px; margin-bottom: 4px; }

.cta-btn {
  width: 100%; background: var(--grad-cta); color: #fff; border: none; border-radius: 13px; padding: 15px;
  font-size: 1.08rem; font-weight: 700; cursor: pointer; margin-top: 10px; font-family: inherit;
  letter-spacing: -.01em; box-shadow: var(--shadow-glow); transition: transform .12s, box-shadow .15s, opacity .15s;
}
.cta-btn:hover { transform: translateY(-1px); box-shadow: 0 16px 40px rgba(1, 143, 223, .45); }
.cta-btn:active { transform: translateY(0); }
.cta-btn:disabled { opacity: .55; cursor: not-allowed; box-shadow: none; }
.cta-btn.small { width: auto; padding: 11px 20px; font-size: .95rem; }
.ghost-btn {
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  border-radius: var(--radius-sm); padding: 11px 20px; cursor: pointer; font-family: inherit; font-weight: 600;
  transition: border-color .15s;
}
.ghost-btn:hover { border-color: var(--border-2); }
.terms-note { font-size: .72rem; color: var(--muted); text-align: center; margin-top: 12px; }

/* ===== Order view ===== */
.order-section { padding: 56px 0; }
.order-card { max-width: 740px; margin: 0 auto; }
.order-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.order-head h2 { font-size: 1.35rem; font-weight: 700; }

.status-steps { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 26px; }
.step {
  display: flex; align-items: center; gap: 7px; font-size: .8rem; color: var(--muted); font-weight: 500;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 20px; padding: 6px 13px;
}
.step .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border-2); }
.step.active { color: var(--text); border-color: var(--accent); }
.step.active .dot { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); animation: pulse 1.4s infinite; }
.step.done { color: var(--green); border-color: rgba(83, 174, 148, .4); }
.step.done .dot { background: var(--green); }
@keyframes pulse { 50% { opacity: .45; } }

.deposit-instr { margin-bottom: 14px; }
.deposit-box {
  display: flex; gap: 22px; align-items: center; background: var(--bg-soft);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 22px; flex-wrap: wrap;
}
#qrcode { background: #fff; padding: 9px; border-radius: 12px; line-height: 0; }
.deposit-addr { flex: 1; min-width: 240px; }
.deposit-addr code { display: block; word-break: break-all; font-size: .95rem; margin-bottom: 12px; }
.copy-btn {
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  border-radius: 9px; padding: 8px 15px; cursor: pointer; font-size: .85rem; font-family: inherit; font-weight: 600;
  transition: border-color .15s;
}
.copy-btn:hover { border-color: var(--accent); }
.timer { margin-top: 12px; font-size: .9rem; color: var(--yellow); font-variant-numeric: tabular-nums; }

.order-summary {
  display: grid; gap: 8px; font-size: .95rem; color: var(--muted-2);
  border-top: 1px solid var(--border); padding-top: 18px;
}
.order-summary b, .order-summary code { color: var(--text); }

.emergency {
  margin-top: 22px; background: rgba(255, 201, 77, .07); border: 1px solid rgba(255, 201, 77, .5);
  border-radius: var(--radius); padding: 20px;
}
.emergency h3 { color: var(--yellow); margin-bottom: 8px; }
.em-actions { display: grid; gap: 12px; margin-top: 14px; }
.em-refund { display: flex; gap: 8px; flex-wrap: wrap; }
.em-refund input { flex: 1; min-width: 200px; }

/* ===== Modals ===== */
.modal {
  position: fixed; inset: 0; background: rgba(6, 7, 13, .72); backdrop-filter: blur(4px); z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: 22px;
}
.modal-box {
  background: #14151f; border: 1px solid var(--border); border-radius: var(--radius);
  width: 100%; max-width: 450px; max-height: 80vh; display: flex; flex-direction: column; padding: 22px;
  box-shadow: var(--shadow);
}
.modal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.modal-head h3 { font-weight: 700; }
.close-btn { background: none; border: none; color: var(--muted); font-size: 1.2rem; cursor: pointer; line-height: 1; padding: 4px; border-radius: 7px; transition: color .15s, background .15s; }
.close-btn:hover { color: var(--text); background: var(--panel); }
.ccy-list { overflow-y: auto; margin-top: 12px; }
.ccy-item {
  display: flex; align-items: center; gap: 13px; padding: 11px 10px;
  border-radius: var(--radius-sm); cursor: pointer; transition: background .12s;
}
.ccy-item:hover { background: var(--panel-2); }
.ccy-item img { width: 30px; height: 30px; border-radius: 50%; }
.ccy-item .ccy-name { color: var(--muted); font-size: .82rem; }
.ccy-item.disabled { opacity: .35; pointer-events: none; }
.orders-list { overflow-y: auto; }
.order-row {
  display: flex; justify-content: space-between; gap: 10px; padding: 13px 10px;
  border-bottom: 1px solid var(--border); cursor: pointer; border-radius: 9px; transition: background .12s;
}
.order-row:hover { background: var(--panel-2); }
.order-row .oid { font-weight: 700; }
.order-row .ostatus { color: var(--muted); font-size: .85rem; }

/* ===== Sections ===== */
.features { padding: 70px 0 24px; }
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: border-color .2s, transform .2s; }
.feat:hover { border-color: var(--border-2); transform: translateY(-3px); }
.feat-ico {
  display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px;
  border-radius: 13px; background: var(--accent-soft); color: var(--accent-2); margin-bottom: 16px;
}
.feat-ico svg { width: 24px; height: 24px; }
.feat h3 { margin-bottom: 9px; font-size: 1.08rem; font-weight: 700; }
.feat p { color: var(--muted-2); font-size: .92rem; }

.how { padding: 70px 0; }
.how h2, .faq h2 { font-size: 1.9rem; margin-bottom: 34px; text-align: center; font-weight: 800; letter-spacing: -.02em; }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.hstep { text-align: center; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 16px; transition: border-color .2s; }
.hstep:hover { border-color: var(--border-2); }
.hstep .num {
  display: inline-flex; width: 42px; height: 42px; align-items: center; justify-content: center;
  background: var(--grad-cta); border-radius: 50%; font-weight: 800; margin-bottom: 12px; box-shadow: var(--shadow-glow);
}
.hstep p { color: var(--muted-2); font-size: .92rem; }

.faq { padding: 24px 0 80px; max-width: 780px; margin: 0 auto; }
.faq details {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 15px 20px; margin-bottom: 11px; transition: border-color .2s;
}
.faq details[open] { border-color: var(--border-2); }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; position: relative; padding-inline-end: 24px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; inset-inline-end: 0; top: -2px; color: var(--accent-2); font-size: 1.3rem; font-weight: 400; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted-2); margin-top: 12px; font-size: .95rem; }

.footer { border-top: 1px solid var(--border); padding: 36px 0 44px; text-align: center; color: var(--muted); font-size: .85rem; }
.brand-name-footer { display: inline-flex; align-items: center; gap: 9px; font-size: 1.1rem; color: var(--text); margin-bottom: 12px; font-weight: 700; }
.brand-name-footer .logo-mark { width: 26px; height: 26px; }
.footer p { margin: 0 auto 6px; max-width: 60ch; }

/* ===== Telegram support floating button ===== */
.tg-support {
  position: fixed; bottom: 22px; inset-inline-start: 22px; z-index: 90;
  display: inline-flex; align-items: center; gap: 8px;
  background: #229ed9; color: #fff; text-decoration: none;
  padding: 12px 17px; border-radius: 999px; font-weight: 700; font-size: .92rem;
  box-shadow: 0 10px 28px rgba(34, 158, 217, .5); transition: transform .14s, box-shadow .14s;
}
.tg-support:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(34, 158, 217, .6); }
.tg-support svg { display: block; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .feat-grid, .steps-grid { grid-template-columns: 1fr 1fr; }
  .hero-inner h1 { font-size: 2.4rem; }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .hero { padding: 30px 0 60px; }
  .hero-inner h1 { font-size: 2rem; }
  .hero-sub { font-size: 1rem; margin-bottom: 26px; }
  .feat-grid, .steps-grid { grid-template-columns: 1fr; }
  .nav { gap: 4px; }
  .nav a[href="#how"], .nav a[href="#faq"] { display: none; }
  .card { padding: 18px; }
  .amount-row input { font-size: 1.12rem; padding: 11px 13px; }
  .ccy-btn { padding: 0 11px; font-size: .92rem; }
  .ccy-btn img { width: 20px; height: 20px; }
  .deposit-box { gap: 16px; padding: 16px; }
  .modal { padding: 0; align-items: flex-end; }
  .modal-box { max-width: 100%; max-height: 88vh; border-radius: 18px 18px 0 0; }
  .tg-support { bottom: 14px; inset-inline-start: 14px; padding: 11px 15px; font-size: .88rem; }
  .order-head { flex-wrap: wrap; gap: 8px; }
  .how h2, .faq h2 { font-size: 1.5rem; }
}
@media (max-width: 380px) {
  .rate-opt { font-size: .85rem; padding: 8px 4px; }
  .amount-row input { font-size: 1rem; }
  .tg-support span { display: none; }
  .tg-support { padding: 13px; }
}