@import url('./fonts.css');

:root {
  --background: #f7f8f3;
  --foreground: #1b2330;
  --muted: #d8ded1;
  --primary: #087f7d;
  --accent: #f0b429;
  --radius: 24px;
  --shadow: 0 24px 60px rgba(27, 35, 48, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--background);
}

body {
  margin: 0;
  background:
    linear-gradient(90deg, rgba(216, 222, 209, 0.34) 1px, transparent 1px),
    linear-gradient(180deg, rgba(216, 222, 209, 0.34) 1px, transparent 1px),
    var(--background);
  background-size: 44px 44px;
  color: var(--foreground);
  font-family:
    "Noto Sans SC", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
}

button,
a {
  font: inherit;
}

a {
  color: inherit;
}

.sr-only,
.skip-link:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--foreground);
  color: var(--background);
  text-decoration: none;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(27, 35, 48, 0.12);
  background: rgba(247, 248, 243, 0.9);
  backdrop-filter: blur(16px);
}

.nav {
  display: flex;
  max-width: 1180px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--foreground);
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  min-width: 3rem;
  min-height: 2rem;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--foreground);
  border-radius: 999px;
  background: var(--accent);
  color: var(--foreground);
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.85rem;
  font-weight: 900;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  border-radius: 999px;
  padding: 0.6rem 0.9rem;
  color: rgba(27, 35, 48, 0.78);
  font-size: 0.95rem;
  text-decoration: none;
  transition:
    background 180ms ease,
    color 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a.is-active {
  background: var(--foreground);
  color: var(--background);
  outline: none;
}

.menu-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(27, 35, 48, 0.18);
  border-radius: 999px;
  background: var(--background);
  color: var(--foreground);
  cursor: pointer;
}

.menu-toggle-line,
.menu-toggle-line::before,
.menu-toggle-line::after {
  display: block;
  width: 1rem;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  content: "";
}

.menu-toggle-line::before {
  transform: translateY(-6px);
}

.menu-toggle-line::after {
  transform: translateY(4px);
}

.reading-progress {
  height: 3px;
  background: rgba(216, 222, 209, 0.8);
}

.reading-progress span {
  display: block;
  width: 0%;
  height: 100%;
  background: var(--primary);
  transition: width 120ms linear;
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.hero {
  display: grid;
  min-height: calc(100vh - 84px);
  padding: 5rem 0 4rem;
  align-items: center;
  gap: 3rem;
  grid-template-columns: minmax(0, 1.02fr) minmax(280px, 0.98fr);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--foreground);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(4rem, 12vw, 9rem);
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2.1rem, 6vw, 4.8rem);
}

h3 {
  margin-bottom: 0.75rem;
  font-size: 1.35rem;
}

.hero-summary {
  max-width: 44rem;
  margin-bottom: 0;
  color: rgba(27, 35, 48, 0.78);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--foreground);
  border-radius: 999px;
  padding: 0.7rem 1.15rem;
  box-shadow: 4px 4px 0 var(--foreground);
  font-weight: 800;
  text-decoration: none;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--foreground);
  outline: none;
}

.button.primary {
  background: var(--primary);
  color: var(--background);
}

.button.secondary {
  background: var(--background);
  color: var(--foreground);
}

.hero-media {
  margin: 0;
  overflow: hidden;
  border: 2px solid var(--foreground);
  border-radius: var(--radius);
  background: var(--muted);
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.hero-media figcaption {
  border-top: 2px solid var(--foreground);
  padding: 0.85rem 1rem;
  color: rgba(27, 35, 48, 0.72);
  font-size: 0.9rem;
}

.section {
  padding: 5rem 0;
  border-top: 1px solid rgba(27, 35, 48, 0.14);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2rem;
}

.section-heading p:last-child {
  color: rgba(27, 35, 48, 0.72);
}

.insight-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card,
.knowledge-item,
.case-panel,
.timeline li {
  border: 1px solid rgba(27, 35, 48, 0.16);
  border-radius: var(--radius);
  background: rgba(247, 248, 243, 0.78);
}

.card {
  display: flex;
  min-height: 18rem;
  padding: 1.25rem;
  flex-direction: column;
  justify-content: space-between;
}

.card p,
.knowledge-item p,
.timeline p,
.case-step span {
  margin-bottom: 0;
  color: rgba(27, 35, 48, 0.72);
}

.card-kicker {
  width: fit-content;
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
  background: var(--accent);
  color: var(--foreground);
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-weight: 900;
}

.split {
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
}

.sticky-heading {
  position: sticky;
  top: 6rem;
  align-self: start;
}

.knowledge-list {
  display: grid;
  gap: 1rem;
}

.knowledge-item {
  padding: 1.5rem;
}

.case-panel {
  margin-top: 3rem;
  padding: 2rem;
}

.case-layout {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
}

.case-steps {
  display: grid;
  gap: 1rem;
}

.case-step {
  display: grid;
  gap: 0.25rem;
  border-left: 5px solid var(--primary);
  padding: 1rem;
  background: rgba(216, 222, 209, 0.45);
}

.code-card {
  overflow: hidden;
  border: 2px solid var(--foreground);
  border-radius: var(--radius);
  background: var(--foreground);
  color: var(--background);
}

.code-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid rgba(247, 248, 243, 0.18);
  padding: 0.8rem 1rem;
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
}

.copy-button {
  border: 1px solid rgba(247, 248, 243, 0.4);
  border-radius: 999px;
  background: transparent;
  color: var(--background);
  cursor: pointer;
  padding: 0.35rem 0.7rem;
}

.copy-button:hover,
.copy-button:focus-visible {
  background: var(--background);
  color: var(--foreground);
  outline: none;
}

pre {
  margin: 0;
  overflow-x: auto;
  padding: 1.25rem;
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92rem;
  line-height: 1.7;
}

.roadmap {
  padding-bottom: 6rem;
}

.timeline {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 1rem;
  list-style: none;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.timeline li {
  padding: 1.25rem;
}

.timeline span {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--primary);
  font-weight: 900;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-top: 2px solid var(--foreground);
  padding: 1.5rem max(1.25rem, calc((100vw - 1180px) / 2));
  background: var(--foreground);
  color: var(--background);
}

.footer p {
  margin-bottom: 0;
}

.footer a {
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 900px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav {
    position: relative;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 1.25rem;
    display: none;
    width: min(18rem, calc(100vw - 2.5rem));
    flex-direction: column;
    align-items: stretch;
    border: 1px solid rgba(27, 35, 48, 0.14);
    border-radius: 1.25rem;
    padding: 0.5rem;
    background: var(--background);
    box-shadow: var(--shadow);
  }

  .nav-links.is-open {
    display: flex;
  }

  .hero,
  .split,
  .case-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3rem;
  }

  .sticky-heading {
    position: static;
  }

  .insight-grid,
  .timeline {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  main {
    padding: 0 1rem;
  }

  .nav {
    padding-inline: 1rem;
  }

  .hero {
    min-height: auto;
    padding-bottom: 3rem;
  }

  .hero-actions,
  .footer {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .insight-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .case-panel {
    padding: 1rem;
  }
}