@import url("tokens.css");

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--spark-paper);
  background: var(--spark-ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--spark-copper);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.2s var(--ease-out);
}

a:hover {
  color: var(--spark-ember-hot);
}

.inline-code {
  font-family: var(--font-mono);
  font-size: 0.95em;
  color: var(--spark-copper);
}

/* Atmosphere: edge-to-edge gradient plane + soft ember */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(
      120% 80% at 70% -10%,
      rgba(232, 93, 4, 0.22) 0%,
      transparent 55%
    ),
    radial-gradient(
      90% 60% at 10% 90%,
      rgba(28, 34, 48, 0.9) 0%,
      transparent 50%
    ),
    linear-gradient(165deg, #0a0c10 0%, #12161f 45%, #0c0e12 100%);
}

.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
  animation: grain-shift 12s linear infinite;
}

@keyframes grain-shift {
  from {
    transform: translate(0, 0);
  }
  to {
    transform: translate(-2%, 1%);
  }
}

.shell {
  width: min(100% - 2.5rem, var(--max-width));
  margin-inline: auto;
}

/* Nav — brand is secondary here; hero owns brand */
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
  animation: rise 0.7s var(--ease-out) both;
}

.top a {
  text-decoration: none;
  color: var(--spark-mist);
  font-size: 0.9375rem;
}

.top a:hover {
  color: var(--spark-paper);
}

.top__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--spark-paper);
}

.mark {
  width: 1.35rem;
  height: 1.35rem;
  flex-shrink: 0;
}

.top__links {
  display: flex;
  gap: var(--space-4);
}

/* Hero — one composition: brand, headline, support, CTAs */
.hero {
  min-height: calc(100vh - 5.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: var(--space-6) var(--space-7);
  max-width: 42rem;
}

.hero__brand {
  margin: 0 0 var(--space-4);
  font-family: var(--font-display);
  font-size: clamp(3.25rem, 10vw, 5.75rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 0.95;
  color: var(--spark-paper);
  text-shadow: var(--shadow-ember);
  animation: rise 0.8s var(--ease-out) 0.08s both;
}

.hero__headline {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.2vw, 1.75rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.25;
  color: var(--spark-mist);
  animation: rise 0.8s var(--ease-out) 0.16s both;
}

.hero__lede {
  margin: 0 0 var(--space-5);
  max-width: 34rem;
  color: var(--spark-fog);
  font-size: 1.0625rem;
  animation: rise 0.8s var(--ease-out) 0.24s both;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  animation: rise 0.8s var(--ease-out) 0.32s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.35rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  border: 1px solid transparent;
  transition:
    background 0.2s var(--ease-out),
    border-color 0.2s var(--ease-out),
    color 0.2s var(--ease-out),
    transform 0.2s var(--ease-out);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: linear-gradient(
    135deg,
    var(--spark-ember-hot) 0%,
    var(--spark-ember) 100%
  );
  color: #120a04;
  box-shadow: 0 8px 28px var(--spark-glow);
}

.btn--primary:hover {
  color: #120a04;
  filter: brightness(1.06);
}

.btn--ghost {
  background: transparent;
  border-color: var(--spark-line-strong);
  color: var(--spark-paper);
}

.btn--ghost:hover {
  border-color: var(--spark-copper);
  color: var(--spark-copper);
}

/* Hello strip — terminal sample from README */
.hello {
  border-top: 1px solid var(--spark-line);
  padding-block: var(--space-6);
  animation: rise 0.9s var(--ease-out) 0.4s both;
}

.hello__label {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--spark-ember);
}

.terminal {
  margin: 0;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--spark-ink-elevated);
  border: 1px solid var(--spark-line);
  overflow-x: auto;
}

.terminal code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--spark-mist);
  white-space: pre;
}

.terminal .cmd {
  color: var(--spark-copper);
}

.terminal .comment {
  color: var(--spark-fog);
}

.thesis {
  margin-top: var(--space-5);
  max-width: 36rem;
  color: var(--spark-fog);
  font-size: 0.9875rem;
}

.thesis strong {
  color: var(--spark-mist);
  font-weight: 600;
}

.site-foot {
  border-top: 1px solid var(--spark-line);
  padding-block: var(--space-4) var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
  color: var(--spark-fog);
  font-size: 0.875rem;
}

.site-foot a {
  color: var(--spark-fog);
  text-decoration: none;
}

.site-foot a:hover {
  color: var(--spark-copper);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

  html {
    scroll-behavior: auto;
  }
}

@media (max-width: 560px) {
  .top__links {
    gap: var(--space-3);
  }

  .hero {
    min-height: auto;
    padding-block: var(--space-5) var(--space-6);
  }

  .btn {
    width: 100%;
  }
}