/* Public landing page. Self-contained and system-font only, so it paints
   fast (good for Core Web Vitals and search ranking) and needs no JS. */
:root {
  --ink: #121726;
  --ink-2: #475068;
  --ink-3: #6b7489;
  --bg: #ffffff;
  --bg-2: #f6f7fb;
  --line: #e3e6ee;
  --accent: #3f48c0;
  --accent-2: #333aa0;
  --grad: linear-gradient(135deg, #2a78d6 0%, #4a3aa7 100%);
  --s1: #2a78d6;
  --s2: #eb6834;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8ecf6;
    --ink-2: #b3bcd1;
    --ink-3: #8791a8;
    --bg: #0b0f1a;
    --bg-2: #10162a;
    --line: #243049;
    --accent: #8b97ff;
    --accent-2: #a3adff;
    --s1: #3987e3;
    --s2: #d95926;
    color-scheme: dark;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Bengali", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--accent);
}
h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
}
.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}
.narrow {
  max-width: 760px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 18px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-lg {
  height: 48px;
  padding: 0 24px;
  font-size: 1rem;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 20px -8px rgb(74 58 167 / 0.7);
}
.btn-primary:hover {
  filter: brightness(1.06);
}
.btn-ghost {
  color: var(--ink);
}
.btn-outline {
  color: var(--ink);
  border-color: var(--line);
  background: var(--bg);
}
.btn-light {
  background: #fff;
  color: #333aa0;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--ink);
  text-decoration: none;
}
.nav-links {
  display: flex;
  gap: 22px;
  margin-left: 12px;
}
.nav-links a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}
.nav-cta {
  margin-left: auto;
  display: flex;
  gap: 8px;
}

.hero {
  padding: 72px 0 80px;
  background: radial-gradient(ellipse 80% 60% at 70% 0%, rgb(74 58 167 / 0.12), transparent 70%);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}
.eyebrow {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
}
.lead {
  font-size: 1.15rem;
  color: var(--ink-2);
  margin: 20px 0 28px;
  max-width: 560px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.fine {
  color: var(--ink-3);
  font-size: 0.85rem;
  margin-top: 16px;
}
.mock {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 30px 60px -24px rgb(16 24 40 / 0.35);
}
.mock-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink-3);
  font-size: 0.85rem;
  gap: 8px;
}
.chip {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 99px;
}
.chip.down {
  background: rgb(18 128 92 / 0.12);
  color: #12805c;
}
.mock-total {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 6px 0 16px;
}
.mock-split {
  display: flex;
  gap: 2px;
  height: 12px;
  border-radius: 99px;
  overflow: hidden;
}
.mock-split span:first-child {
  background: var(--s1);
}
.mock-split span:last-child {
  background: var(--s2);
}
.mock-legend {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--ink-2);
  margin: 12px 0 18px;
}
.sw {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  margin-right: 6px;
}
.sw1 {
  background: var(--s1);
}
.sw2 {
  background: var(--s2);
}
.mock-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}
.mock-list li {
  display: grid;
  grid-template-columns: 1fr auto;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}
.mock-list li span {
  color: var(--ink-3);
  font-size: 0.8rem;
  grid-row: 2;
}
.mock-list li em {
  font-style: normal;
  font-weight: 700;
  grid-row: span 2;
  align-self: center;
}
.mock-list li em.warn {
  color: #b25e09;
}

.section {
  padding: 88px 0;
}
.section.alt {
  background: var(--bg-2);
}
.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 800;
  text-align: center;
}
.section-lead {
  text-align: center;
  color: var(--ink-2);
  max-width: 620px;
  margin: 14px auto 48px;
  font-size: 1.05rem;
}
.left {
  text-align: left;
  margin-left: 0;
}
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px;
  background: var(--bg);
}
.feature h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.feature p {
  color: var(--ink-2);
  margin: 0;
  font-size: 0.95rem;
}
.steps {
  list-style: none;
  padding: 0;
  margin: 48px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.step-n {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--grad);
  color: #fff;
  font-weight: 800;
  margin-bottom: 16px;
}
.steps h3 {
  margin-bottom: 8px;
}
.steps p {
  color: var(--ink-2);
  margin: 0;
}
.privacy {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}
.checks {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}
.checks li {
  padding: 14px 18px 14px 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  position: relative;
  font-weight: 600;
}
.checks li::before {
  content: "✓";
  position: absolute;
  left: 16px;
  color: #12805c;
  font-weight: 800;
}
details {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}
summary {
  font-weight: 650;
  cursor: pointer;
  font-size: 1.05rem;
}
details p {
  color: var(--ink-2);
  margin: 10px 0 0;
}
.cta {
  background: var(--grad);
  color: #fff;
}
.cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}
.cta h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
}
.footer {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 0.9rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer nav {
  display: flex;
  gap: 18px;
}
.footer a {
  color: var(--ink-2);
  text-decoration: none;
}

@media (max-width: 900px) {
  .hero-inner,
  .privacy {
    grid-template-columns: 1fr;
  }
  .grid,
  .steps {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .hero {
    padding: 48px 0 56px;
  }
  .section {
    padding: 64px 0;
  }
}
@media (max-width: 480px) {
  .nav-cta .btn-ghost {
    display: none;
  }
}