:root {
  /* Deep Arctic Minimal — premium */
  --bg: #0b0f14;
  --bg2: #070a0f;
  --surface: rgba(255, 255, 255, 0.03);
  --surface2: rgba(255, 255, 255, 0.045);
  --card: rgba(255, 255, 255, 0.035);
  --border: rgba(255, 255, 255, 0.09);
  --border2: rgba(255, 255, 255, 0.14);

  --text: #f3f4f6;
  --muted: #9ca3af;
  --muted2: #6b7280;

  --accent: #2563eb;
  --accent2: #60a5fa;

  --shadow1: 0 18px 70px rgba(0, 0, 0, 0.55);
  --shadow2: 0 10px 40px rgba(0, 0, 0, 0.35);

  --r12: 12px;
  --r16: 16px;
  --r20: 20px;
  --r28: 28px;

  --max: 1140px;

  /* Typography scale */
  --h1: clamp(36px, 4.6vw, 58px);
  --h2: clamp(22px, 2.2vw, 28px);
  --p: 16px;
  --small: 13px;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Helvetica,
    Arial;
  background:
    radial-gradient(
      1200px 800px at 20% -10%,
      rgba(37, 99, 235, 0.18),
      transparent 60%
    ),
    radial-gradient(
      1000px 700px at 90% 0%,
      rgba(96, 165, 250, 0.12),
      transparent 55%
    ),
    linear-gradient(180deg, var(--bg2), var(--bg));
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 22px;
}

/* --------- background polish ---------- */
.bg-glow {
  position: fixed;
  inset: -2px;
  z-index: -2;
  background:
    radial-gradient(
      700px 500px at 16% 18%,
      rgba(37, 99, 235, 0.2),
      transparent 62%
    ),
    radial-gradient(
      900px 650px at 82% 12%,
      rgba(96, 165, 250, 0.16),
      transparent 60%
    ),
    radial-gradient(
      900px 700px at 50% 95%,
      rgba(37, 99, 235, 0.12),
      transparent 55%
    ),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 35%);
  filter: saturate(105%);
}

.bg-glow::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.14'/%3E%3C/svg%3E");
  opacity: 0.35;
  mix-blend-mode: overlay;
}

/* --------- header ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 50;

  backdrop-filter: blur(14px);
  background: rgba(11, 15, 20, 0.66);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 780;
  letter-spacing: 0.3px;
}

.logo {
  width: 36px;
  height: 36px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background:
    radial-gradient(
      14px 14px at 30% 30%,
      rgba(96, 165, 250, 0.9),
      transparent 60%
    ),
    radial-gradient(
      20px 18px at 70% 65%,
      rgba(37, 99, 235, 0.85),
      transparent 62%
    ),
    linear-gradient(145deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.03));
  box-shadow: 0 18px 50px rgba(37, 99, 235, 0.22);
}

nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

nav a {
  color: var(--muted);
  font-size: 14px;
  padding: 10px 12px;
  border-radius: 14px;
  transition:
    background 0.18s var(--ease),
    color 0.18s var(--ease),
    transform 0.18s var(--ease);
}

nav a:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  transform: translateY(-1px);
}

/* --------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;

  padding: 11px 15px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);

  font-weight: 700;
  font-size: 14px;

  transition:
    transform 0.16s var(--ease),
    background 0.16s var(--ease),
    border-color 0.16s var(--ease),
    box-shadow 0.16s var(--ease);
  will-change: transform;
}

.btn:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.14);
}

.btn:active {
  transform: translateY(0px) scale(0.99);
}

.btn.primary {
  border-color: rgba(37, 99, 235, 0.45);
  background: linear-gradient(
    135deg,
    rgba(37, 99, 235, 0.95),
    rgba(96, 165, 250, 0.85)
  );
  box-shadow: 0 20px 60px rgba(37, 99, 235, 0.24);
}

.btn.primary:hover {
  box-shadow: 0 26px 80px rgba(37, 99, 235, 0.3);
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.02);
}

/* --------- hero ---------- */
.hero {
  padding: 82px 0 42px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: start;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;

  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.03);

  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.2px;
}

.badge::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent2);
  box-shadow: 0 0 0 6px rgba(96, 165, 250, 0.12);
}

h1 {
  margin: 14px 0 12px;
  font-size: var(--h1);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: var(--p);
  max-width: 62ch;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.tags span {
  font-size: 12px;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.02);
}

/* --------- hero card ---------- */
.hero-card {
  border-radius: var(--r28);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background:
    radial-gradient(
      700px 260px at 25% 0%,
      rgba(37, 99, 235, 0.2),
      transparent 55%
    ),
    linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.06),
      rgba(255, 255, 255, 0.02)
    );
  box-shadow: var(--shadow1);
  overflow: hidden;
  transform: translateY(0);
  transition:
    transform 0.22s var(--ease),
    border-color 0.22s var(--ease);
}

.hero-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.14);
}

.card-top {
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  color: var(--muted);
  font-size: 13px;
  background: rgba(0, 0, 0, 0.15);
}

.progress {
  margin-top: 10px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.progress div {
  height: 100%;
  width: 72%;
  background: linear-gradient(
    90deg,
    rgba(96, 165, 250, 0.9),
    rgba(37, 99, 235, 0.9)
  );
}

.card-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 18px;
}

.card-content > div {
  padding: 16px;
  border-radius: var(--r20);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(11, 15, 20, 0.55);
}

.card-content h3 {
  margin: 0 0 2px;
  font-size: 26px;
  letter-spacing: -0.02em;
}

.card-content p {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

/* --------- sections ---------- */
.section {
  padding: 72px 0;
}

.section.dark {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 30%),
    rgba(255, 255, 255, 0.01);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

h2 {
  margin: 0;
  font-size: var(--h2);
  letter-spacing: -0.02em;
}

.cards {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  border-radius: var(--r20);
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.02);
  padding: 20px;
  box-shadow: var(--shadow2);
  transition:
    transform 0.18s var(--ease),
    border-color 0.18s var(--ease),
    background 0.18s var(--ease);
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.03);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* --------- process ---------- */
.process {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.process > div {
  border-radius: var(--r20);
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.02);
  padding: 18px;
  transition:
    transform 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.process > div:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.14);
}

.process span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(37, 99, 235, 0.16);
  color: var(--text);
  font-weight: 850;
  font-size: 12px;
  margin-bottom: 10px;
}

.process h4 {
  margin: 0 0 6px;
  font-size: 14px;
}

.process p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

/* --------- footer ---------- */
footer {
  padding: 42px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--muted);
  font-size: 13px;
  background: rgba(0, 0, 0, 0.12);
  text-align: center;
}

/* --------- responsiveness ---------- */
@media (max-width: 960px) {
  .hero {
    padding: 64px 0 34px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .cards {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .process {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  nav {
    display: none;
  } /* mobile: minimal */
}

@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }
  h1 {
    letter-spacing: -0.02em;
  }
  .process {
    grid-template-columns: 1fr;
  }
  .hero-buttons .btn {
    width: 100%;
  }
}

/* --------- accessibility / focus ---------- */
:focus-visible {
  outline: 2px solid rgba(96, 165, 250, 0.9);
  outline-offset: 3px;
  border-radius: 12px;
}

/* --------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}