/* ---- Tokens ---- */
:root {
  /* Type scale: base 16, Major Third (1.25) → 16 / 20 / 25 / 31 / 39 / 49 */
  --fs-caption: 0.8125rem; /* 13 */
  --fs-body: 1rem; /* 16 */
  --fs-lead: 1.25rem; /* 20 */
  --fs-h3: 1.25rem; /* 20 */
  --fs-h2: 1.9375rem; /* 31 */
  --fs-display: clamp(2.4375rem, 5.5vw, 3.0625rem); /* 39–49 */

  --color-surface: #ffffff;
  --color-surface-alt: #f6f4f1;
  --color-on-surface: #21252b;
  --color-on-surface-dim: #5a616c;
  --color-interactive: #c73f14; /* molten ember — buttons & links only; ≥4.5:1 on both light surfaces */
  --color-interactive-hover: #a83208;
  --color-outline: #e2ded9;

  --color-dark-surface: #16181d;
  --color-dark-on: #f4f2ef;
  --color-dark-on-dim: #a8adb6;
  --color-dark-accent: #ff6a3c; /* accent on dark, decorative logo tint */

  --radius: 12px;
  --space: 1rem;
  --content-width: 68rem;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  font-size: var(--fs-body);
  line-height: 1.55;
  color: var(--color-on-surface);
  background: var(--color-surface);
}

.wrap {
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

a {
  color: var(--color-interactive);
}
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-interactive);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---- Header ---- */
header {
  background: var(--color-dark-surface);
  color: var(--color-dark-on);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space);
  padding-block: 1.25rem;
}
.nav .brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-dark-on);
  text-decoration: none;
  font-weight: 500;
}
.nav .brand svg {
  height: 3rem;
  width: auto;
  color: var(--color-dark-accent);
}
.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}
.nav-links a {
  color: var(--color-dark-on-dim);
  text-decoration: none;
  font-size: var(--fs-caption);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.nav-links a:hover {
  color: var(--color-dark-on);
  text-decoration: underline;
}
@media (max-width: 40rem) {
  .nav-links {
    display: none;
  }
}

/* ---- Hero ---- */
.hero {
  background: var(--color-dark-surface);
  color: var(--color-dark-on);
  padding-block: clamp(4rem, 10vw, 7.5rem);
  text-align: center;
}
.hero .logo-mark {
  height: clamp(5rem, 12vw, 7.5rem);
  width: auto;
  color: var(--color-dark-accent);
  margin-bottom: 2rem;
}
.hero h1 {
  font-size: var(--fs-display);
  font-weight: 500;
  line-height: 1.15;
  max-width: 24ch;
  margin-inline: auto;
  letter-spacing: -0.015em;
}
.hero p {
  font-size: var(--fs-lead);
  color: var(--color-dark-on-dim);
  max-width: 46ch;
  margin: 1.25rem auto 2.5rem;
}
.cta-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius);
  font-size: var(--fs-body);
  font-weight: 500;
  text-decoration: none;
  min-height: 44px;
  transition:
    background-color 150ms ease,
    border-color 150ms ease;
}
.btn-primary {
  background: var(--color-interactive);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--color-interactive-hover);
}
.btn-secondary {
  color: var(--color-dark-on);
  border: 1px solid var(--color-dark-on-dim);
}
.btn-secondary:hover {
  border-color: var(--color-dark-on);
}

/* ---- Sections ---- */
section {
  padding-block: clamp(3.5rem, 8vw, 6rem);
}
.section-alt {
  background: var(--color-surface-alt);
}

.kicker {
  display: block;
  font-size: var(--fs-caption);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-interactive);
  margin-bottom: 0.75rem;
}
h2 {
  font-size: var(--fs-h2);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
  max-width: 28ch;
}
.section-intro {
  color: var(--color-on-surface-dim);
  max-width: 60ch;
  margin-top: 1rem;
}

/* ---- Feature grid ---- */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
  list-style: none;
}
@media (max-width: 56rem) {
  .features {
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  }
}
.feature {
  background: var(--color-surface);
  border: 1px solid var(--color-outline);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.feature .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 10px;
  background: #fbe9e2;
  color: var(--color-interactive);
  margin-bottom: 1.1rem;
}
.feature .icon svg {
  width: 1.4rem;
  height: 1.4rem;
}
.feature h3 {
  font-size: var(--fs-h3);
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.feature p {
  color: var(--color-on-surface-dim);
  font-size: var(--fs-body);
}

/* ---- How it works ---- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
  list-style: none;
  counter-reset: step;
}
.step {
  counter-increment: step;
}
.step::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-size: var(--fs-h2);
  font-weight: 500;
  color: var(--color-interactive);
  margin-bottom: 0.5rem;
}
.step h3 {
  font-size: var(--fs-h3);
  font-weight: 500;
  margin-bottom: 0.4rem;
}
.step p {
  color: var(--color-on-surface-dim);
}

/* ---- Platform note ---- */
.platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
  list-style: none;
}
.platforms li {
  border: 1px solid var(--color-outline);
  border-radius: 999px;
  padding: 0.45rem 1.1rem;
  font-size: var(--fs-caption);
  color: var(--color-on-surface-dim);
  background: var(--color-surface);
}

/* ---- Contact / final CTA ---- */
.contact {
  background: var(--color-dark-surface);
  color: var(--color-dark-on);
  text-align: center;
}
.contact h2 {
  margin-inline: auto;
}
.contact p {
  color: var(--color-dark-on-dim);
  max-width: 46ch;
  margin: 1rem auto 2.25rem;
}

/* ---- Footer ---- */
footer {
  background: var(--color-dark-surface);
  color: var(--color-dark-on-dim);
  border-top: 1px solid #2a2d35;
  padding-block: 1.75rem;
  font-size: var(--fs-caption);
}
footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
footer svg {
  height: 1.75rem;
  width: auto;
  color: var(--color-dark-on-dim);
}