:root {
  --bg: #090a0f;
  --bg-subtle: #11131a;
  --card: rgba(18, 20, 29, 0.78);
  --card-hover: rgba(26, 29, 41, 0.9);
  --card-solid: #12141d;
  --fg: #f8fafc;
  --fg-bright: #ffffff;
  --muted: #94a3b8;
  --muted-dim: #64748b;
  --line: rgba(255, 255, 255, 0.08);
  --line-soft: rgba(255, 255, 255, 0.04);
  --line-strong: rgba(255, 255, 255, 0.16);
  --accent: #d8ff5f;
  --accent-fg: #090a0f;
  --accent-glow: rgba(216, 255, 95, 0.18);
  --ok: #4ade80;
  --ok-bg: rgba(74, 222, 128, 0.12);
  --ok-border: rgba(74, 222, 128, 0.25);
  --warn: #fbbf24;
  --warn-bg: rgba(251, 191, 36, 0.12);
  --warn-border: rgba(251, 191, 36, 0.25);
  --err: #f87171;
  --err-bg: rgba(248, 113, 113, 0.12);
  --err-border: rgba(248, 113, 113, 0.25);
  --radius-xl: 1.25rem;
  --radius: 0.85rem;
  --radius-sm: 0.55rem;
  --radius-xs: 0.35rem;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 50px -10px rgba(0, 0, 0, 0.65);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "PingFang SC", "Segoe UI", Roboto, sans-serif;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --bg-subtle: #f1f5f9;
    --card: rgba(255, 255, 255, 0.88);
    --card-hover: #ffffff;
    --card-solid: #ffffff;
    --fg: #0f172a;
    --fg-bright: #020617;
    --muted: #64748b;
    --muted-dim: #94a3b8;
    --line: rgba(15, 23, 42, 0.08);
    --line-soft: rgba(15, 23, 42, 0.04);
    --line-strong: rgba(15, 23, 42, 0.16);
    --accent: #15803d;
    --accent-fg: #ffffff;
    --accent-glow: rgba(21, 128, 61, 0.12);
    --ok: #16a34a;
    --ok-bg: #ecfdf5;
    --ok-border: #bbf7d0;
    --warn: #d97706;
    --warn-bg: #fffbeb;
    --warn-border: #fde68a;
    --err: #dc2626;
    --err-bg: #fef2f2;
    --err-border: #fecaca;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow: 0 10px 30px -8px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 24px 50px -12px rgba(15, 23, 42, 0.12);
    color-scheme: light;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--bg); color: var(--fg); -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; min-width: 320px; color: var(--fg); font: 400 15px/1.6 var(--sans);
  background-color: var(--bg);
  background-image: 
    radial-gradient(circle at 50% -20%, rgba(216, 255, 95, 0.12), transparent 45rem),
    radial-gradient(circle at 100% 50%, rgba(56, 189, 248, 0.05), transparent 35rem),
    radial-gradient(circle at 0% 100%, rgba(168, 85, 247, 0.05), transparent 35rem);
  background-attachment: fixed;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-color-scheme: light) {
  body {
    background-image: 
      radial-gradient(circle at 50% -20%, rgba(21, 128, 61, 0.08), transparent 45rem),
      radial-gradient(circle at 100% 50%, rgba(56, 189, 248, 0.04), transparent 35rem);
  }
}

a { color: inherit; text-decoration: none; transition: opacity .15s ease, color .15s ease; }
a:hover { opacity: .85; }
::selection { background: var(--accent); color: var(--accent-fg); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--radius-xs); }
code, .mono { font-family: var(--mono); font-size: .88em; }

/* ---------- layout shell ---------- */
.wrap { max-width: 78rem; margin: 0 auto; padding: 1.5rem 1.25rem 5rem; }
.wrap.md { max-width: 58rem; }
.wrap.narrow { max-width: 32rem; padding-top: 4.5rem; }
@media (min-width: 768px) { .wrap { padding: 2.25rem 2rem 6rem; } }

/* ---------- navigation topbar ---------- */
.topbar {
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
  margin-bottom: 2.5rem; padding: 0.85rem 1.2rem;
  background: var(--card); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.brand { display: flex; align-items: center; gap: 0.65rem; margin: 0; font-size: 1.05rem; letter-spacing: -0.025em; font-weight: 700; color: var(--fg-bright); }
.brand .mark { display: inline-flex; align-items: center; line-height: 0; }
.brand .mark svg { display: block; border-radius: 0.42rem; }
.brand .brand-text { letter-spacing: -0.03em; }
.brand .sub { font-size: 0.8rem; font-weight: 400; color: var(--muted); }
.brand .sub::before { content: ""; display: inline-block; width: 1px; height: 0.85em; background: var(--line-strong); margin: 0 0.55rem; vertical-align: -0.08em; }
.topbar .right { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }
.nav-links { display: flex; gap: 1rem; align-items: center; font-size: 0.88rem; color: var(--muted); }
.nav-links a:hover { color: var(--fg); }

/* ---------- cards & bento grid ---------- */
.card {
  position: relative; background: var(--card); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--line); border-radius: var(--radius-xl); padding: 1.6rem;
  box-shadow: var(--shadow); transition: border-color .2s ease, transform .2s ease;
}
.card + .card { margin-top: 1.25rem; }
.card.glow:hover { border-color: var(--line-strong); }
.card h2 { font-size: 1.15rem; letter-spacing: -0.02em; font-weight: 600; margin: 0 0 0.4rem; color: var(--fg-bright); }
.card-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.2rem; }

.bento-grid { display: grid; gap: 1.25rem; margin-top: 1.5rem; }
@media (min-width: 768px) { .bento-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .bento-grid.col-4 { grid-template-columns: repeat(4, 1fr); } }
.bento-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.5rem; display: flex; flex-direction: column; justify-content: space-between;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.bento-card:hover { transform: translateY(-2px); border-color: var(--line-strong); box-shadow: var(--shadow); }
.bento-icon {
  width: 2.5rem; height: 2.5rem; border-radius: var(--radius-sm);
  background: var(--line-soft); border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center; color: var(--accent);
  margin-bottom: 1rem;
}
.bento-card h3 { font-size: 1rem; font-weight: 600; margin: 0 0 0.45rem; color: var(--fg-bright); }
.bento-card p { margin: 0; color: var(--muted); font-size: 0.88rem; line-height: 1.6; }

/* ---------- typography & microcopy ---------- */
.dim { color: var(--muted); }
.dim-strong { color: var(--muted-dim); }
.small { font-size: 0.82rem; }
.fineprint { color: var(--muted); font-size: 0.8rem; line-height: 1.8; margin-top: 1.75rem; text-align: center; }
.err { color: var(--err); font-size: 0.86rem; margin: 0.6rem 0 0; }

/* ---------- tags & status pills ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 0.4rem; border-radius: 999px;
  padding: 0.2rem 0.65rem; font-size: 0.76rem; font-weight: 500; line-height: 1.5;
  border: 1px solid var(--line); color: var(--muted); background: var(--bg-subtle);
  white-space: nowrap;
}
.tag.ok { color: var(--ok); background: var(--ok-bg); border-color: var(--ok-border); }
.tag.warn { color: var(--warn); background: var(--warn-bg); border-color: var(--warn-border); }
.tag.err { color: var(--err); background: var(--err-bg); border-color: var(--err-border); }
.tag.plain::before { display: none; }

.pulse-dot {
  width: 0.48rem; height: 0.48rem; border-radius: 999px; background: currentColor;
  position: relative; display: inline-block;
}
.pulse-dot::after {
  content: ""; position: absolute; inset: -3px; border-radius: 999px;
  background: inherit; opacity: 0.4; animation: pulseRing 2s cubic-bezier(0.24, 0, 0.38, 1) infinite;
}
@keyframes pulseRing {
  0% { transform: scale(0.9); opacity: 0.6; }
  70% { transform: scale(2.2); opacity: 0; }
  100% { transform: scale(2.2); opacity: 0; }
}

/* ---------- buttons & inputs ---------- */
button, .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.45rem;
  font: inherit; font-size: 0.88rem; font-weight: 500; cursor: pointer;
  border-radius: var(--radius-sm); border: 1px solid var(--line);
  background: var(--card); color: var(--fg); padding: 0.58rem 1.1rem;
  transition: all .15s ease; text-decoration: none; box-shadow: var(--shadow-sm);
}
button:hover, .btn:hover { background: var(--card-hover); border-color: var(--line-strong); opacity: 1; }
button:active, .btn:active { transform: scale(0.98); }
button.primary, .btn.primary {
  background: var(--fg-bright); color: var(--bg); border-color: var(--fg-bright); font-weight: 600;
}
button.primary:hover, .btn.primary:hover { opacity: 0.92; background: var(--fg-bright); }
button.accent, .btn.accent {
  background: var(--accent); color: var(--accent-fg); border-color: var(--accent); font-weight: 600;
}
button.ghost, .btn.ghost {
  border-color: transparent; background: transparent; color: var(--muted); box-shadow: none;
}
button.ghost:hover, .btn.ghost:hover { background: var(--line-soft); color: var(--fg); }
button:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

label { display: block; font-size: 0.82rem; font-weight: 500; color: var(--muted); margin: 0 0 0.85rem; }
input, select {
  display: block; width: 100%; margin-top: 0.35rem; font: inherit; font-size: 0.9rem;
  color: var(--fg); background: var(--bg-subtle); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 0.6rem 0.8rem; transition: border-color .15s ease, box-shadow .15s ease;
}
input:focus, select:focus {
  border-color: var(--accent); outline: none; box-shadow: 0 0 0 1px var(--accent);
}
input[type=file] { padding: 0.45rem 0.5rem; font-size: 0.82rem; color: var(--muted); }
form.inline { display: inline-flex; align-items: center; gap: 0.5rem; margin: 0; }

/* ---------- landing hero ---------- */
.hero { padding: 3rem 1.75rem 2.5rem; }
@media (min-width: 900px) {
  .hero-layout { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 2.5rem; align-items: center; }
}
.eyebrow-pill {
  display: inline-flex; align-items: center; gap: 0.55rem; padding: 0.25rem 0.8rem;
  border-radius: 999px; background: var(--line-soft); border: 1px solid var(--line);
  font-size: 0.78rem; font-weight: 500; color: var(--muted); margin-bottom: 1.25rem;
}
.eyebrow-pill .dot { width: 0.45rem; height: 0.45rem; border-radius: 999px; background: var(--accent); }
.hero h1 {
  margin: 0; font-size: clamp(2.1rem, 5.5vw, 3.4rem); line-height: 1.08;
  letter-spacing: -0.045em; font-weight: 700; color: var(--fg-bright);
}
.hero .lead {
  margin: 1.25rem 0 0; max-width: 48ch; color: var(--muted); font-size: 1.05rem; line-height: 1.7;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.75rem; }

/* hero interactive simulation card */
.hero-preview {
  background: var(--card-solid); border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: 1.4rem; box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.hero-preview::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.preview-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.1rem; }
.preview-flow { display: grid; gap: 0.65rem; }
.flow-step {
  display: flex; align-items: center; gap: 0.75rem; padding: 0.65rem 0.85rem;
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 0.82rem;
}
.flow-step .step-badge {
  font-family: var(--mono); font-size: 0.72rem; padding: 0.15rem 0.45rem;
  border-radius: 0.3rem; background: var(--line-soft); color: var(--muted);
}
.flow-step .step-main { flex: 1; }
.flow-step .step-status { font-size: 0.75rem; color: var(--ok); }

/* ---------- code windows & tabs ---------- */
.code-window {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card-solid); overflow: hidden; margin-top: 1.2rem;
}
.code-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.6rem 1rem; border-bottom: 1px solid var(--line); background: var(--bg-subtle);
}
.window-dots { display: flex; gap: 0.35rem; }
.window-dot { width: 0.65rem; height: 0.65rem; border-radius: 999px; background: var(--line-strong); }
.tab-nav { display: flex; gap: 0.35rem; }
.tab-btn {
  font: inherit; font-size: 0.78rem; font-weight: 500; padding: 0.3rem 0.7rem;
  border-radius: var(--radius-xs); border: 1px solid transparent; background: transparent;
  color: var(--muted); cursor: pointer; box-shadow: none;
}
.tab-btn:hover { color: var(--fg); background: var(--line-soft); }
.tab-btn.active { color: var(--fg-bright); background: var(--card); border-color: var(--line); font-weight: 600; }
.snippet {
  margin: 0; padding: 1.1rem 1.25rem; font-family: var(--mono); font-size: 0.82rem;
  line-height: 1.7; overflow-x: auto; color: var(--fg); background: transparent; white-space: pre;
}

/* ---------- cashier UI ---------- */
.cashier { max-width: 58rem; margin: 0 auto; display: grid; gap: 1.5rem; }
@media (min-width: 820px) { .cashier { grid-template-columns: minmax(0, 1.2fr) 21rem; align-items: start; } }

.cashier .summary { padding: 2rem 1.8rem; }
.cashier .merchant { font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin: 0 0 0.75rem; }
.cashier h1 { margin: 0; font-size: clamp(1.4rem, 3.2vw, 1.95rem); letter-spacing: -0.03em; font-weight: 600; }
.amount-container {
  margin: 1.4rem 0 1rem; padding: 1.1rem 1.25rem;
  background: var(--bg-subtle); border: 1px solid var(--line); border-radius: var(--radius);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.75rem;
}
.amount { font-size: clamp(2.2rem, 6vw, 3rem); font-weight: 700; letter-spacing: -0.04em; font-variant-numeric: tabular-nums; line-height: 1; }
.copy-badge {
  display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.35rem 0.7rem;
  font-size: 0.78rem; border-radius: var(--radius-xs); background: var(--card); border: 1px solid var(--line);
  color: var(--fg); cursor: pointer; transition: all .15s ease;
}
.copy-badge:hover { background: var(--card-hover); border-color: var(--accent); }

.suffix-banner {
  border: 1px solid var(--warn-border); background: var(--warn-bg); border-radius: var(--radius-sm);
  padding: 0.85rem 1rem; font-size: 0.85rem; line-height: 1.65; color: var(--warn); margin-top: 1rem;
}
.suffix-banner strong { color: var(--fg-bright); font-weight: 600; }

.checks { list-style: none; margin: 1.4rem 0 0; padding: 0; display: grid; gap: 0.65rem; }
.checks li { display: flex; gap: 0.65rem; align-items: flex-start; color: var(--muted); font-size: 0.86rem; }
.checks svg { flex: none; margin-top: 0.2rem; color: var(--ok); }

.pay-panel { padding: 1.8rem 1.5rem; text-align: center; }
.qr-container {
  position: relative; background: #ffffff; border-radius: var(--radius); padding: 1.1rem;
  display: inline-flex; box-shadow: var(--shadow);
}
.qr-container::before, .qr-container::after {
  content: ""; position: absolute; width: 1.3rem; height: 1.3rem; border: 3px solid var(--fg-bright);
}
.qr-container::before { top: -3px; left: -3px; border-right: 0; border-bottom: 0; border-radius: 0.6rem 0 0 0; }
.qr-container::after { bottom: -3px; right: -3px; border-left: 0; border-top: 0; border-radius: 0 0 0.6rem 0; }
.qr-container img { display: block; width: 220px; height: 220px; object-fit: contain; }

.progress-bar { height: 6px; border-radius: 999px; background: var(--line); overflow: hidden; margin: 1.25rem 0 0.65rem; }
.progress-bar > i {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--ok));
  width: 100%; transition: width 1s linear;
}
.countdown { margin: 0; font-size: 0.85rem; color: var(--muted); font-variant-numeric: tabular-nums; }

.paid-mark {
  width: 3.8rem; height: 3.8rem; border-radius: 999px;
  background: var(--ok-bg); color: var(--ok); border: 2px solid var(--ok-border);
  display: grid; place-items: center; margin: 0 auto 1.25rem;
}

/* ---------- admin console ---------- */
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.85rem; margin-bottom: 1.5rem; }
@media (min-width: 820px) { .stats-grid { grid-template-columns: repeat(4, 1fr); } }
.stat-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem 1.25rem; box-shadow: var(--shadow-sm);
}
.stat-card .k { font-size: 0.76rem; color: var(--muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }
.stat-card .v { font-size: 1.7rem; font-weight: 700; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; margin-top: 0.3rem; color: var(--fg-bright); }

.console-tabs {
  display: flex; gap: 0.5rem; border-bottom: 1px solid var(--line); margin-bottom: 1.5rem; overflow-x: auto;
}
.console-tab {
  font: inherit; font-size: 0.88rem; font-weight: 500; padding: 0.65rem 1rem;
  border: 0; border-bottom: 2px solid transparent; background: transparent;
  color: var(--muted); cursor: pointer; box-shadow: none; border-radius: 0;
  white-space: nowrap;
}
.console-tab:hover { color: var(--fg); background: transparent; }
.console-tab.active { color: var(--fg-bright); border-bottom-color: var(--accent); font-weight: 600; }

.tenant-selector {
  display: inline-flex; align-items: center; gap: 0.5rem; background: var(--bg-subtle);
  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.35rem 0.65rem;
  font-size: 0.82rem;
}
.tenant-selector select {
  background: transparent; border: 0; margin: 0; padding: 0; font-size: 0.82rem; color: var(--fg); cursor: pointer;
}

/* tables */
.data-table-container { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table.data-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; text-align: left; }
table.data-table th {
  background: var(--bg-subtle); color: var(--muted); font-size: 0.74rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em; padding: 0.75rem 1rem; border-bottom: 1px solid var(--line);
}
table.data-table td { padding: 0.85rem 1rem; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
table.data-table tbody tr:last-child td { border-bottom: 0; }
table.data-table tbody tr:hover { background: var(--line-soft); }

.channels-grid { display: grid; gap: 1rem; margin-top: 1rem; }
@media (min-width: 768px) { .channels-grid { grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr)); } }
.channel-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem; display: grid; grid-template-columns: 5rem 1fr; gap: 1rem; align-items: start;
}
.channel-card .thumb {
  background: #ffffff; border-radius: var(--radius-xs); padding: 0.35rem; aspect-ratio: 1;
  display: grid; place-items: center; border: 1px solid var(--line);
}
.channel-card .thumb img { width: 100%; height: auto; display: block; border-radius: 0.2rem; }

/* toasts */
.toast-container {
  position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 9999; display: grid; gap: 0.5rem;
}
.toast {
  padding: 0.65rem 1.1rem; border-radius: var(--radius-sm); font-size: 0.84rem;
  background: var(--card-solid); border: 1px solid var(--line-strong); color: var(--fg-bright);
  box-shadow: var(--shadow); display: flex; align-items: center; gap: 0.5rem;
  animation: slideUp .2s ease;
}
@keyframes slideUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 719px) {
  table.responsive thead { display: none; }
  table.responsive tbody tr {
    display: block; border: 1px solid var(--line); border-radius: var(--radius-sm);
    padding: 0.8rem; margin-bottom: 0.75rem; background: var(--card);
  }
  table.responsive td { display: flex; justify-content: space-between; gap: 1rem; border: 0; padding: 0.35rem 0; font-size: 0.84rem; }
  table.responsive td::before { content: attr(data-label); color: var(--muted); font-size: 0.76rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}