/* XCHANGE styles: plain CSS, no framework. */

:root {
  --navy: #0b1220;
  --navy-2: #111a2e;
  --blue: #3b82f6;
  --blue-dark: #2563eb;
  --purple: #8b5cf6;
  --cyan: #22d3ee;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 4px 16px rgba(15, 23, 42, .06);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

main { flex: 1; outline: none; }

a { color: var(--blue-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .6em; }
h1 { font-size: 1.9rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.05rem; }
h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.page { padding-top: 32px; padding-bottom: 56px; }
.narrow { max-width: 760px; }
.auth { max-width: 460px; }
.section { padding-top: 40px; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.section-head h1, .section-head h2 { margin: 0; }

.muted { color: var(--muted); }
.small { font-size: .875rem; }
.center { text-align: center; }
.hint { color: var(--muted); font-size: .85rem; margin: 4px 0 0; }
.prewrap { white-space: pre-wrap; }
.ok { color: var(--green); font-weight: 600; }

/* ---------- header ---------- */

.header { background: var(--navy); color: #fff; position: sticky; top: 0; z-index: 20; }
.nav { display: flex; align-items: center; gap: 16px; min-height: 60px; }
.logo { color: #fff; font-weight: 800; letter-spacing: .06em; display: flex; align-items: center; gap: 8px; }
.logo:hover { text-decoration: none; }
.logo-mark {
  display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--purple)); font-size: 18px;
}
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav-links a, .nav-links .me, .nav-links .linkish { color: #cbd5e1; padding: 8px 10px; border-radius: 8px; font-size: .95rem; }
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, .06); text-decoration: none; }
.nav-links a.active { color: #fff; background: rgba(255, 255, 255, .1); }
.nav-links a.btn { color: #fff; margin-left: 4px; }
.nav-links .me { display: inline-flex; align-items: center; gap: 6px; color: #fff; }
.balance { color: #86efac; font-weight: 600; }
.menu-btn { display: none; margin-left: auto; background: none; border: 0; color: #fff; font-size: 22px; cursor: pointer; padding: 6px 8px; }

.count {
  display: inline-block; min-width: 20px; padding: 0 6px; border-radius: 999px;
  background: var(--red); color: #fff; font-size: .75rem; line-height: 20px; text-align: center;
}

/* ---------- buttons & forms ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 16px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font: inherit; font-weight: 600; cursor: pointer;
  text-decoration: none; transition: background .15s, border-color .15s, transform .05s;
}
.btn:hover { text-decoration: none; border-color: #cbd5e1; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--blue-dark); border-color: var(--blue-dark); color: #fff; }
.btn-primary:hover { background: #1d4ed8; border-color: #1d4ed8; }
.btn-danger { color: var(--red); }
.btn-danger:hover { border-color: var(--red); }
.btn-ghost { background: rgba(255, 255, 255, .08); border-color: rgba(255, 255, 255, .25); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, .15); border-color: rgba(255, 255, 255, .4); }
.btn-ghost-dark { background: transparent; }
.btn-lg { padding: 14px 22px; font-size: 1.05rem; }
.btn-small { padding: 6px 12px; font-size: .875rem; }
.btn-block { width: 100%; margin-top: 10px; }

.linkish { background: none; border: 0; padding: 0; font: inherit; color: var(--blue-dark); cursor: pointer; }
.linkish:hover { text-decoration: underline; }

.form { display: flex; flex-direction: column; gap: 14px; }
.form label, .credits label { display: flex; flex-direction: column; gap: 6px; font-weight: 600; font-size: .9rem; }
input, select, textarea {
  width: 100%; font: inherit; font-weight: 400; color: var(--text);
  padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: #fff;
}
input:focus, select:focus, textarea:focus { outline: 2px solid rgba(59, 130, 246, .35); border-color: var(--blue); }
textarea { resize: vertical; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.panel + .panel { margin-top: 16px; }
.form .panel + .panel { margin-top: 0; }

/* ---------- hero ---------- */

.hero {
  color: #fff; text-align: center;
  background:
    radial-gradient(600px 300px at 20% 20%, rgba(59, 130, 246, .25), transparent 70%),
    radial-gradient(600px 300px at 80% 80%, rgba(139, 92, 246, .22), transparent 70%),
    linear-gradient(135deg, #020617, #172554 55%, #0f172a);
}
.hero-inner { padding-top: 72px; padding-bottom: 64px; max-width: 860px; }
.pill {
  display: inline-block; padding: 6px 14px; margin-bottom: 20px; border-radius: 999px;
  border: 1px solid rgba(59, 130, 246, .4); background: rgba(59, 130, 246, .12); color: #93c5fd; font-size: .85rem; font-weight: 600;
}
.hero h1 { font-size: clamp(2.1rem, 6vw, 3.6rem); letter-spacing: -.02em; }
.grad { background: linear-gradient(90deg, #60a5fa, #a78bfa, var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 1.15rem; color: #cbd5e1; max-width: 620px; margin: 0 auto 28px; }
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.stats { display: flex; justify-content: center; gap: 40px; margin-top: 44px; flex-wrap: wrap; }
.stats div { display: flex; flex-direction: column; }
.stats strong { font-size: 1.8rem; }
.stats span { color: #94a3b8; font-size: .85rem; }

/* ---------- categories & steps ---------- */

.cats { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
.cat {
  display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: 10px;
  background: var(--surface); border: 1px solid var(--border); color: var(--text); font-weight: 600; font-size: .92rem;
}
.cat:hover { border-color: var(--blue); text-decoration: none; }
.cat span { font-size: 1.3rem; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.step p { color: var(--muted); margin: 0; }
.step-n {
  display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; margin-bottom: 12px;
  background: linear-gradient(135deg, var(--blue), var(--purple)); color: #fff; font-weight: 700;
}

/* ---------- listing cards ---------- */

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.card {
  display: flex; flex-direction: column; overflow: hidden; color: var(--text);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
  transition: transform .15s, box-shadow .15s;
}
.card:hover { text-decoration: none; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15, 23, 42, .1); }
.card-thumb {
  display: grid; place-items: center; height: 110px; font-size: 44px;
  background: linear-gradient(135deg, #eff6ff, #f5f3ff);
}
.card-body { padding: 14px 16px 16px; display: flex; flex-direction: column; flex: 1; }
.card-cat { color: var(--muted); font-size: .78rem; font-weight: 600; margin-bottom: 4px; }
.card-title { font-size: 1rem; margin: 0 0 6px; }
.card-wants { color: var(--muted); font-size: .85rem; margin: 0 0 10px; }
.card-foot { margin-top: auto; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.value { font-weight: 700; color: var(--blue-dark); white-space: nowrap; }
.value-lg { font-size: 1.8rem; margin-bottom: 12px; }
.value-xl { font-size: 2.6rem; }

/* ---------- browse ---------- */

.filters { display: grid; grid-template-columns: 1fr 220px 200px; gap: 10px; margin-bottom: 12px; }

/* ---------- listing detail ---------- */

.back { display: inline-block; margin-bottom: 16px; font-size: .9rem; }
.detail { display: grid; grid-template-columns: 1fr 320px; gap: 24px; align-items: start; }
.detail-thumb {
  display: grid; place-items: center; height: 220px; margin-bottom: 18px; font-size: 90px;
  background: linear-gradient(135deg, #eff6ff, #f5f3ff); border-radius: var(--radius); border: 1px solid var(--border);
}
.detail-side { position: sticky; top: 80px; }
.owner { display: flex; align-items: center; gap: 10px; padding: 12px 0; border-top: 1px solid var(--border); margin-top: 4px; }
.avatar {
  display: inline-grid; place-items: center; flex: none; width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--purple)); color: #fff; font-weight: 700; font-size: .8rem;
}
.avatar-sm { width: 26px; height: 26px; font-size: .7rem; }
.notice { background: #fef3c7; color: #92400e; padding: 10px 12px; border-radius: 10px; margin: 0; }

/* ---------- propose ---------- */

.checks { display: flex; flex-direction: column; gap: 8px; }
.check {
  display: grid !important; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px !important;
  padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; cursor: pointer; font-weight: 500 !important;
}
.check:has(input:checked) { border-color: var(--blue); background: #eff6ff; }
.check input { width: 18px; height: 18px; margin: 0; }
.credits { display: grid; grid-template-columns: 140px 1fr; gap: 12px; margin-top: 16px; }
.summary { background: #f8fafc; }
.sum-row { display: flex; justify-content: space-between; padding: 4px 0; }
.sum-verdict { border-top: 1px solid var(--border); margin: 8px 0 10px; padding-top: 10px; }
.warn { color: var(--amber); font-size: .875rem; margin: 0 0 10px; }

/* ---------- exchanges ---------- */

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; overflow-x: auto; }
.tabs a { padding: 10px 14px; color: var(--muted); font-weight: 600; border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap; }
.tabs a:hover { color: var(--text); text-decoration: none; }
.tabs a.active { color: var(--text); border-bottom-color: var(--blue-dark); }
.exchange-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 14px; }
.exchange-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.exchange ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.exchange blockquote { margin: 14px 0 0; padding: 10px 14px; background: #f8fafc; border-left: 3px solid var(--blue); border-radius: 0 8px 8px 0; color: #334155; }
.exchange .form-actions { margin-top: 16px; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: .75rem; font-weight: 700; text-transform: capitalize; }
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-accepted { background: #dcfce7; color: #166534; }
.badge-declined, .badge-cancelled, .badge-closed { background: #f1f5f9; color: #475569; }

/* ---------- wallet ---------- */

.wallet-hero { text-align: center; margin-bottom: 28px; }
.table { width: 100%; border-collapse: collapse; }
.table td { padding: 12px 4px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table tr:last-child td { border-bottom: 0; }
.num { text-align: right; font-weight: 700; white-space: nowrap; }
.pos { color: var(--green); }
.neg { color: var(--red); }

/* ---------- auth ---------- */

.demo-users { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 12px; }
.demo-users .btn { justify-content: flex-start; font-weight: 500; }

/* ---------- misc ---------- */

.empty { text-align: center; padding: 48px 16px; background: var(--surface); border: 1px dashed var(--border); border-radius: var(--radius); }
.empty p { color: var(--muted); }

.footer { background: var(--navy); color: #cbd5e1; margin-top: 40px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; padding-top: 20px; padding-bottom: 20px; font-size: .9rem; }
.footer .muted { color: #94a3b8; }
.footer .linkish { color: #93c5fd; }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); z-index: 50;
  max-width: calc(100% - 32px); padding: 12px 18px; border-radius: 10px;
  background: var(--navy); color: #fff; box-shadow: 0 10px 30px rgba(0, 0, 0, .25);
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast-error { background: var(--red); }

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .detail { grid-template-columns: 1fr; }
  .detail-side { position: static; }
  .steps { grid-template-columns: 1fr; }
  .filters { grid-template-columns: 1fr 1fr; }
  .filters input { grid-column: 1 / -1; }

  .menu-btn { display: block; }
  .nav { flex-wrap: wrap; }
  .nav-links { display: none; width: 100%; flex-direction: column; align-items: stretch; padding-bottom: 12px; }
  .menu-open .nav-links { display: flex; }
  .nav-links a.btn { margin: 6px 0 0; }
  .nav-links .linkish { text-align: left; }
}

@media (max-width: 560px) {
  h1 { font-size: 1.55rem; }
  .row, .exchange-cols, .credits, .demo-users { grid-template-columns: 1fr; }
  .filters { grid-template-columns: 1fr; }
  .stats { gap: 24px; }
  .hero-inner { padding-top: 48px; padding-bottom: 44px; }
}