:root {
  --bg: #0d1424;
  --surface: #172138;
  --accent: #73e0c7;
  --accent2: #59b8d1;
  --text: #ebf2f7;
  --muted: #8594a8;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --font-round: system-ui, -apple-system, "SF Pro Rounded", "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, monospace;
  --pad: clamp(20px, 4vw, 32px);
  --max: 1080px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-round);
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #1a2a4a 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

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

a {
  color: var(--accent);
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
}

.skip:focus {
  left: var(--pad);
  top: var(--pad);
  z-index: 100;
  background: var(--surface);
  padding: 8px 12px;
  border-radius: 8px;
}

/* corner_stack nav */
.corner-stack {
  position: fixed;
  left: var(--pad);
  bottom: var(--pad);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.corner-stack a {
  color: var(--muted);
  text-decoration: none;
  padding: 4px 0;
  border-left: 2px solid transparent;
  padding-left: 10px;
  transition: color 0.2s, border-color 0.2s;
}

.corner-stack a:hover,
.corner-stack a:focus-visible {
  color: var(--accent);
  border-left-color: var(--accent);
}

/* collage_overlap hero */
.hero.collage-overlap {
  position: relative;
  min-height: min(92vh, 820px);
  padding: calc(var(--pad) * 2) var(--pad) var(--pad);
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  align-items: end;
}

.hero-collage {
  position: absolute;
  inset: var(--pad) var(--pad) 35% var(--pad);
  pointer-events: none;
}

.collage-piece {
  position: absolute;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(115, 224, 199, 0.15);
}

.collage-piece.p1 {
  width: min(38vw, 220px);
  left: 0;
  top: 8%;
  transform: rotate(-4deg);
}

.collage-piece.p2 {
  width: min(34vw, 200px);
  right: 12%;
  top: 0;
  transform: rotate(6deg);
}

.collage-piece.p3 {
  width: min(30vw, 180px);
  left: 28%;
  bottom: 18%;
  transform: rotate(-8deg);
  opacity: 0.92;
}

.collage-piece.p4 {
  width: min(72vw, 640px);
  left: 50%;
  top: 22%;
  transform: translateX(-50%) rotate(1deg);
  border-radius: 20px;
  z-index: -1;
  opacity: 0.55;
}

.hero-copy {
  position: relative;
  max-width: 520px;
  padding: 28px 32px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(12px);
  border-radius: 20px;
  border: 1px solid rgba(115, 224, 199, 0.2);
}

.hero-copy.align-right {
  margin-left: auto;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent2);
  margin: 0 0 8px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 400;
  margin: 0 0 12px;
  line-height: 1.1;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

/* sections */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(48px, 10vw, 96px) var(--pad);
}

.section-intro {
  max-width: 540px;
  margin-bottom: 36px;
}

.section-intro.align-left {
  margin-right: auto;
}

.section-intro.align-right {
  margin-left: auto;
  text-align: right;
}

.section-intro h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 400;
  margin: 0 0 10px;
}

.section-intro p {
  margin: 0;
  color: var(--muted);
}

/* numbered_steps */
.step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.step-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: start;
  padding: 24px 28px;
  background: var(--surface);
  border-radius: 16px;
  border: 1px solid rgba(133, 148, 168, 0.12);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
}

.step-list h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.step-list p {
  margin: 0;
  color: var(--muted);
}

/* carousel_peek */
.carousel {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
}

.carousel-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding: 24px;
  padding: 12px 8px 24px;
  flex: 1;
  -webkit-overflow-scrolling: touch;
}

.carousel-track::-webkit-scrollbar {
  height: 6px;
}

.carousel-track::-webkit-scrollbar-thumb {
  background: var(--muted);
  border-radius: 99px;
}

.carousel-slide {
  flex: 0 0 min(78%, 320px);
  scroll-snap-align: start;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(115, 224, 199, 0.25);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  background: var(--surface);
}

.carousel-slide img {
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 19.5;
  object-fit: cover;
  object-position: top;
}

.carousel-btn {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(115, 224, 199, 0.35);
  background: var(--surface);
  color: var(--accent);
  border-radius: 50%;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.carousel-btn:hover {
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
}

/* tab_switch legal */
.tab-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.tab-bar button {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid rgba(133, 148, 168, 0.25);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.tab-bar button[aria-selected="true"] {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.tab-panel {
  padding: 28px 32px;
  background: var(--surface);
  border-radius: 16px;
  border: 1px solid rgba(133, 148, 168, 0.12);
}

.tab-panel.hidden {
  display: none;
}

.tab-panel h3 {
  margin-top: 0;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.5rem;
}

.tab-panel p {
  color: var(--muted);
}

.site-foot {
  text-align: center;
  padding: 32px var(--pad)  calc(var(--pad) + 80px);
  font-size: 0.85rem;
  color: var(--muted);
}

@media (max-width: 720px) {
  .hero-collage {
    inset: var(--pad) var(--pad) 50% var(--pad);
  }

  .collage-piece.p4 {
    opacity: 0.35;
  }

  .hero-copy.align-right {
    margin-left: 0;
  }

  .section-intro.align-right {
    text-align: left;
    margin-left: 0;
  }

  .carousel-btn {
    display: none;
  }
}