:root {
  --bg: #f6f8fb;
  --bg-alt: #eef2f7;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #5b6475;
  --accent: #0d9488;
  --accent-soft: #ccfbf1;
  --tg: #229ed9;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --warn: #d97706;
  --warn-soft: #fef3c7;
  --safe: #16a34a;
  --safe-soft: #dcfce7;
  --shadow: 0 10px 30px -12px rgba(15, 23, 42, .18);
  --radius: 16px;
  --font: "Kantumruy Pro", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --bg-alt: #0f172a;
    --surface: #131c2e;
    --border: #23304a;
    --text: #e6ebf5;
    --muted: #94a3b8;
    --accent: #2dd4bf;
    --accent-soft: rgba(45, 212, 191, .12);
    --danger: #f87171;
    --danger-soft: rgba(248, 113, 113, .12);
    --warn: #fbbf24;
    --warn-soft: rgba(251, 191, 36, .12);
    --safe: #4ade80;
    --safe-soft: rgba(74, 222, 128, .12);
    --shadow: 0 10px 30px -12px rgba(0, 0, 0, .6);
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }  /* .btn etc. set display, which would otherwise win */
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--font); font-size: 16px; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
code { font-family: var(--mono); font-size: .88em; background: var(--bg-alt); padding: 1px 6px; border-radius: 6px; }
h1, h2, h3 { line-height: 1.35; margin: 0; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 80%, transparent); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { font-weight: 700; font-size: 21px; display: flex; align-items: center; gap: 9px; letter-spacing: -0.01em; }
.brand-logo { display: block; width: 30px; height: 30px; }
.brand-word { line-height: 1; }
.brand-kh { color: var(--accent); }
.nav-links { display: flex; gap: 20px; margin-left: auto; color: var(--muted); }
.nav-links a:hover { color: var(--text); }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; border: 0; cursor: pointer;
  font: inherit; font-weight: 600; border-radius: 12px; padding: 10px 18px; transition: transform .1s, filter .15s; }
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--accent); color: var(--on-accent, #fff); }
@media (prefers-color-scheme: dark) { :root { --on-accent: #042f2c; } .step-n { color: #042f2c; } }
.btn-tg { background: var(--tg); color: #fff; }
.btn-lg { padding: 14px 24px; font-size: 17px; white-space: nowrap; }

/* hero */
.hero { padding: 56px 0 40px; background:
  radial-gradient(700px 300px at 50% -60px, var(--accent-soft), transparent 70%); }
.eyebrow { margin: 0 0 8px; color: var(--accent); font-weight: 600; text-align: center; }
h1 { font-size: clamp(30px, 5vw, 48px); text-align: center; font-weight: 700; }
.hl { color: var(--accent); }
.lead { max-width: 620px; margin: 14px auto 32px; text-align: center; color: var(--muted); font-size: 17px; }

/* scanner */
.scanner { max-width: 720px; margin: 0 auto; padding: 8px; }
.tabs { display: flex; gap: 4px; background: var(--bg-alt); border-radius: 12px; padding: 4px; }
.tab { flex: 1; border: 0; background: transparent; font: inherit; font-weight: 600; color: var(--muted);
  padding: 10px; border-radius: 9px; cursor: pointer; }
.tab.active { background: var(--surface); color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.pane { padding: 16px 12px 10px; }
.input-row { display: flex; gap: 8px; }
.input-row input { flex: 1; min-width: 0; font: inherit; font-family: var(--mono); font-size: 15px;
  padding: 12px 14px; border-radius: 12px; border: 1px solid var(--border); background: var(--bg); color: var(--text); }
.input-row input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.hint { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.chip { font: inherit; font-size: 13px; font-family: var(--mono); border: 1px solid var(--border); background: var(--bg);
  color: var(--muted); border-radius: 999px; padding: 2px 10px; cursor: pointer; margin: 2px; }
.chip:hover { color: var(--text); border-color: var(--accent); }
.drop { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 36px 16px; cursor: pointer;
  border: 2px dashed var(--border); border-radius: 14px; text-align: center; transition: border-color .15s, background .15s; }
.drop:hover, .drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop-icon { font-size: 36px; }
.drop-title { font-weight: 600; }
.drop-sub { color: var(--muted); font-size: 14px; }

.loading { display: flex; align-items: center; gap: 14px; padding: 16px 12px; }
.loading[hidden] { display: none; }
.loading-sub { color: var(--muted); font-size: 14px; }
.spinner { width: 28px; height: 28px; border-radius: 50%; border: 3px solid var(--border);
  border-top-color: var(--accent); animation: spin .8s linear infinite; flex: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.error { margin: 4px 12px 12px; padding: 10px 14px; border-radius: 10px; background: var(--danger-soft); color: var(--danger); }

/* result */
.result { max-width: 720px; margin: 20px auto 0; overflow: hidden; animation: rise .25s ease-out; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
.r-head { display: flex; align-items: center; gap: 16px; padding: 20px 22px; }
.r-head.dangerous { background: var(--danger-soft); }
.r-head.suspicious { background: var(--warn-soft); }
.r-head.safe { background: var(--safe-soft); }
.r-badge { font-size: 34px; line-height: 1; }
.r-level { font-size: 22px; font-weight: 700; }
.dangerous .r-level { color: var(--danger); }
.suspicious .r-level { color: var(--warn); }
.safe .r-level { color: var(--safe); }
.r-score { margin-left: auto; text-align: right; }
.r-score b { font-size: 28px; }
.r-score span { color: var(--muted); }
.meter { height: 8px; background: var(--border); border-radius: 99px; overflow: hidden; width: 140px; margin-top: 4px; }
.meter i { display: block; width: 0; height: 100%; border-radius: 99px; transition: width .6s ease-out; }
.dangerous .meter i { background: var(--danger); }
.suspicious .meter i { background: var(--warn); }
.safe .meter i { background: var(--safe); }

.r-body { padding: 18px 22px 22px; display: grid; gap: 18px; }
.r-target { font-family: var(--mono); font-size: 15px; word-break: break-all; font-weight: 500; }
.r-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.pill { font-size: 13px; padding: 2px 10px; border-radius: 99px; background: var(--bg-alt); color: var(--muted); }
.r-section h4 { margin: 0 0 8px; font-size: 15px; }
.r-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.r-list li { display: flex; gap: 10px; align-items: flex-start; padding: 8px 12px; border-radius: 10px; background: var(--bg); }
.dot { width: 10px; height: 10px; border-radius: 50%; flex: none; margin-top: 9px; }
.dot.high { background: var(--danger); }
.dot.mid { background: var(--warn); }
.dot.info { background: var(--muted); }
.dot.ok { background: var(--safe); }
.advice { padding: 14px 16px; border-radius: 12px; border-left: 4px solid; }
.advice.dangerous { background: var(--danger-soft); border-color: var(--danger); }
.advice.suspicious { background: var(--warn-soft); border-color: var(--warn); }
.advice.safe { background: var(--safe-soft); border-color: var(--safe); }
details.hash summary { cursor: pointer; color: var(--muted); font-size: 14px; }
details.hash code { display: block; margin-top: 6px; word-break: break-all; padding: 8px 10px; }

/* sections */
.section { padding: 64px 0; }
.section.alt { background: var(--bg-alt); }
.section h2 { font-size: clamp(24px, 3.5vw, 32px); text-align: center; margin-bottom: 32px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.feature h3 { font-size: 17px; margin: 10px 0 6px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }
.f-icon { font-size: 28px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.steps li { text-align: center; padding: 8px; }
.step-n { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 700; font-size: 18px; }
.steps h3 { font-size: 17px; margin: 12px 0 4px; }
.steps p { margin: 0; color: var(--muted); font-size: 15px; }
.cta { display: flex; align-items: center; gap: 24px; padding: 32px; }
.cta h2 { text-align: left; margin-bottom: 6px; }
.cta p { margin: 0; color: var(--muted); }
/* pricing */
.section-lead { text-align: center; color: var(--muted); margin: -20px auto 32px; max-width: 560px; }
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 820px; margin: 0 auto; align-items: start; }
.plan { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 26px; display: grid; gap: 16px; }
.plan.pro { border: 2px solid var(--accent); box-shadow: var(--shadow); }
.plan h3 { font-size: 20px; }
.plan-badge { position: absolute; top: -12px; right: 20px; background: var(--accent); color: var(--on-accent, #fff);
  font-size: 13px; font-weight: 600; padding: 2px 12px; border-radius: 99px; }
.price b { font-size: 40px; line-height: 1; }
.price span { color: var(--muted); margin-left: 6px; }
.plan-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font-size: 15px; }
.plan-list li { padding-left: 28px; position: relative; }
.plan-list li::before { position: absolute; left: 0; top: 0; }
.plan-list li.yes::before { content: "✅"; }
.plan-list li.no { color: var(--muted); }
.plan-list li.no::before { content: "—"; left: 4px; }
.btn-block { justify-content: center; width: 100%; padding: 12px 18px; }
.btn-ghost { justify-content: center; border: 1px solid var(--border); background: transparent; color: var(--text); }
.plans.single { grid-template-columns: minmax(0, 440px); justify-content: center; }
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-note { text-align: center; color: var(--muted); font-size: 14px; margin: 12px 0 0; }
.demo { max-width: 720px; margin: 36px auto 0; }
.demo figcaption { text-align: center; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.demo .result { margin-top: 0; }
.meter i.full { width: 100%; }
.plan-note { margin: 0; color: var(--muted); font-size: 13px; text-align: center; }
.upsell { display: inline-block; margin-left: 6px; color: var(--accent); font-weight: 600; white-space: nowrap; }

/* how-to video */
.howto { display: grid; grid-template-columns: auto minmax(0, 420px); gap: 48px; justify-content: center; align-items: center; }
.phone { position: relative; margin: 0; width: 272px; padding: 10px; border-radius: 42px; background: #0b0f17;
  box-shadow: 0 0 0 2px #2a3242, 0 30px 60px -20px rgba(0, 0, 0, .45); }
.phone video { display: block; width: 100%; height: auto; aspect-ratio: 288 / 624; border-radius: 32px; background: #000; }
.phone-play { position: absolute; inset: 0; margin: auto; width: 64px; height: 64px; border-radius: 50%; border: 0;
  background: rgba(255, 255, 255, .92); color: #0b0f17; font-size: 24px; cursor: pointer; box-shadow: 0 10px 30px rgba(0,0,0,.35); }
.howto-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.howto-steps button { all: unset; box-sizing: border-box; cursor: pointer; width: 100%; display: grid;
  grid-template-columns: 44px 1fr; gap: 4px 14px; align-items: center; padding: 16px 18px; border-radius: 16px;
  border: 1px solid var(--border); background: var(--surface); transition: border-color .2s, box-shadow .2s, opacity .2s; opacity: .7; }
.howto-steps button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.howto-steps li.active button { opacity: 1; border-color: var(--accent); box-shadow: var(--shadow); }
.howto-steps b { display: block; font-size: 16px; }
.howto-steps small { display: block; color: var(--muted); font-size: 14px; margin-top: 2px; }
.howto-steps .step-n { width: 40px; height: 40px; font-size: 16px; }
.step-bar { grid-column: 2; height: 3px; border-radius: 3px; background: var(--border); overflow: hidden; display: block; }
.step-bar i { display: block; height: 100%; width: 0; background: var(--accent); }
@media (max-width: 760px) {
  .howto { grid-template-columns: 1fr; gap: 28px; justify-items: center; }
  .phone { width: 240px; }
}

/* checkout */
.checkout { border: 0; border-radius: 20px; padding: 0; width: min(420px, calc(100vw - 32px)); max-height: calc(100dvh - 32px);
  background: var(--surface); color: var(--text); box-shadow: 0 30px 80px -20px rgba(0,0,0,.45); }
.checkout::backdrop { background: rgba(5, 10, 20, .6); backdrop-filter: blur(3px); }
.co-close { position: absolute; top: 10px; right: 12px; border: 0; background: transparent; color: var(--muted);
  font-size: 18px; cursor: pointer; width: 36px; height: 36px; border-radius: 50%; }
.co-close:hover { background: var(--bg-alt); color: var(--text); }
.co-step { padding: 28px 24px 24px; display: grid; gap: 12px; text-align: center; justify-items: center; }
.co-step[hidden] { display: none; }
.co-step h2 { font-size: 22px; margin: 0; }
.co-step p { margin: 0; color: var(--muted); }
.co-amount { font-size: 16px; }
.co-amount b { color: var(--text); font-size: 26px; }
.co-qr { background: #fff; padding: 12px; border-radius: 16px; border: 1px solid var(--border); }
.co-qr img { display: block; width: 240px; height: 240px; image-rendering: pixelated; }
.co-hint { font-size: 14px; }
.co-wait { font-size: 14px; display: flex; align-items: center; gap: 8px; }
.co-wait b { color: var(--text); font-variant-numeric: tabular-nums; }
.co-bill { font-size: 12px; }
.co-check { font-size: 52px; line-height: 1; }
.co-note { font-size: 13px; }
.dot-pulse { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .25; transform: scale(.7); } }
@media (prefers-reduced-motion: reduce) { .dot-pulse { animation: none; } }

.footer { padding: 28px 0; border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; text-align: center; }

@media (max-width: 760px) {
  /* phones: keep only the Premium link in the nav */
  .nav-links { gap: 0; }
  .nav-links a:not([href="#pricing"]) { display: none; }
  .nav-links a[href="#pricing"] { color: var(--accent); font-weight: 600; }
  .btn-tg span { display: none; }
  .nav .btn-tg { margin-left: auto; padding: 10px; }
  .grid, .steps, .plans { grid-template-columns: 1fr; }
  .cta { flex-direction: column; align-items: stretch; text-align: center; }
  .cta h2 { text-align: center; }
  .r-head { flex-wrap: wrap; }
  .meter { width: 100px; }
  .input-row { flex-direction: column; }
}