:root {
  --ink: #14201c;
  --ink-soft: #3a4a44;
  --paper: #f3f6f4;
  --paper-2: #e7eee9;
  --line: rgba(20, 32, 28, 0.12);
  --teal: #0f6b5c;
  --teal-deep: #0a4d42;
  --amber: #c47a1a;
  --white: #ffffff;
  --hero-height: min(100vh, 920px);
  --font-display: "Bricolage Grotesque", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --space: clamp(1.25rem, 3vw, 2.5rem);
  --wrap: min(1120px, calc(100% - 2 * var(--space)));
  --radius: 4px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(15, 107, 92, 0.08), transparent 60%),
    radial-gradient(900px 400px at 100% 0%, rgba(196, 122, 26, 0.07), transparent 55%),
    linear-gradient(180deg, #f7faf8 0%, var(--paper) 40%, #eef3f0 100%);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--teal-deep);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--teal);
}

code {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.9em;
  background: rgba(15, 107, 92, 0.08);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--ink);
  color: var(--white);
  padding: 0.5rem 0.85rem;
  z-index: 100;
}

.skip-link:focus {
  top: 1rem;
}

.wrap {
  width: var(--wrap);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(243, 246, 244, 0.82);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease, background 200ms ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(243, 246, 244, 0.94);
}

.header-inner {
  width: var(--wrap);
  margin-inline: auto;
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--ink);
}

.nav-cta {
  color: var(--white) !important;
  background: var(--teal);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius);
}

.nav-cta:hover {
  background: var(--teal-deep);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: var(--radius);
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  margin: 0.28rem auto;
  background: var(--ink);
}

/* Hero */
.hero {
  position: relative;
  min-height: var(--hero-height);
  display: grid;
  align-items: end;
  color: var(--white);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  background:
    url("https://images.unsplash.com/photo-1517248135467-4c7edcad34c4?auto=format&fit=crop&w=2000&q=80")
    center / cover no-repeat;
  transform: scale(1.04);
  animation: heroZoom 12s ease-out forwards;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 28, 24, 0.35) 0%, rgba(10, 28, 24, 0.55) 40%, rgba(10, 28, 24, 0.88) 100%),
    linear-gradient(90deg, rgba(10, 28, 24, 0.55), transparent 55%);
}

.hero-content {
  position: relative;
  width: var(--wrap);
  margin: 0 auto;
  padding: clamp(5rem, 12vh, 8rem) 0 clamp(3rem, 8vh, 5rem);
  max-width: 40rem;
  margin-right: auto;
  margin-left: max(var(--space), calc((100% - min(1120px, 100% - 2 * var(--space))) / 2));
  width: min(40rem, calc(100% - 2 * var(--space)));
}

.brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.95;
  color: #f4faf7;
  animation: rise 700ms ease both;
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.8vw, 1.85rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  max-width: 28ch;
  color: rgba(255, 255, 255, 0.92);
  animation: rise 700ms ease 120ms both;
}

.lede {
  margin: 0 0 1.75rem;
  max-width: 42ch;
  color: rgba(244, 250, 247, 0.82);
  font-size: 1.05rem;
  animation: rise 700ms ease 220ms both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: rise 700ms ease 320ms both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}

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

.btn-primary {
  background: #e8f3ef;
  color: var(--teal-deep);
}

.btn-primary:hover {
  background: var(--white);
  color: var(--ink);
}

.btn-ghost {
  background: transparent;
  color: #f4faf7;
  border-color: rgba(244, 250, 247, 0.45);
}

.btn-ghost:hover {
  background: rgba(244, 250, 247, 0.1);
  color: #fff;
}

/* Sections */
.section {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
}

.section-alt {
  background: rgba(231, 238, 233, 0.55);
  border-block: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 0.55rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
}

.section h2,
.finding h3,
.track h3,
.aside h3,
.status-block h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.15;
  font-size: clamp(1.75rem, 3.5vw, 2.45rem);
}

.section-copy {
  margin: 0;
  max-width: 62ch;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.stat-strip {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
}

.stat-strip strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1;
}

.stat-strip span {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Team */
.team-list {
  list-style: none;
  margin: 2.25rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}

.team-list li {
  padding: 1.35rem 1.25rem 1.35rem 0;
  border-bottom: 1px solid var(--line);
}

.team-list li:nth-child(odd) {
  padding-right: 1.5rem;
  border-right: 1px solid var(--line);
}

.team-list h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.team-list p {
  margin: 0;
  color: var(--ink-soft);
}

/* Tracks */
.track-grid {
  margin-top: 2.25rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.track {
  padding-top: 1.25rem;
  border-top: 3px solid var(--teal);
}

.track-label {
  margin: 0 0 0.4rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--amber);
}

.track p {
  color: var(--ink-soft);
  margin: 0 0 1rem;
}

.track ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--ink);
}

.track li + li {
  margin-top: 0.35rem;
}

/* Modules */
.module-table {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
}

.module-row {
  display: grid;
  grid-template-columns: minmax(10rem, 0.35fr) 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.module-head {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--ink-soft);
}

.module-row span:last-child {
  color: var(--ink-soft);
}

/* Findings */
.findings {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem 1.75rem;
}

.finding {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.finding h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.finding p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1rem;
}

/* Dataset split */
.split {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 2.5rem;
  align-items: start;
}

.aside {
  padding: 1.25rem 0 0;
  border-top: 3px solid var(--amber);
}

.aside h3 {
  font-size: 1.2rem;
}

.aside ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
}

/* Workflow */
.workflow {
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  counter-reset: step;
}

.workflow li {
  position: relative;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line);
  counter-increment: step;
}

.workflow li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: 0.65rem;
  left: 0;
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--teal);
  letter-spacing: -0.03em;
}

.workflow strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
}

.workflow span {
  color: var(--ink-soft);
}

.repo-tree {
  margin: 2rem 0 0;
  padding: 1.25rem 1.35rem;
  overflow-x: auto;
  background: #15231f;
  color: #d7ebe4;
  border-radius: var(--radius);
  font-size: 0.92rem;
  line-height: 1.55;
}

.repo-tree code {
  background: transparent;
  padding: 0;
  color: inherit;
}

/* Status */
.status-block {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 2rem;
  align-items: end;
}

.cta-panel {
  border-top: 3px solid var(--teal);
  padding-top: 1.1rem;
}

.cta-panel p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

/* Gallery */
.gallery-toolbar {
  margin-top: 1.75rem;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.filter-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.filter-btn:hover {
  border-color: rgba(15, 107, 92, 0.35);
  color: var(--ink);
}

.filter-btn.is-active {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--white);
}

.gallery-meta {
  margin: 0.25rem 0 1.25rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.gallery-root {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.gallery-module h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.gallery-module .module-path {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.chart-card {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1rem 0.85rem;
}

.chart-card h4 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.chart-note {
  margin: 0 0 0.85rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.4;
  word-break: break-word;
}

.chart-canvas-wrap {
  position: relative;
  height: 280px;
}

.chart-card-table {
  grid-column: 1 / -1;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.table-wrap th,
.table-wrap td {
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.table-wrap th {
  background: rgba(15, 107, 92, 0.08);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.table-wrap tr:last-child td {
  border-bottom: 0;
}

/* Footer */
.site-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line);
  background: #e4ebe6;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.footer-inner p {
  margin: 0;
}

/* Motion helpers */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 650ms ease, transform 650ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes heroZoom {
  from {
    transform: scale(1.08);
  }
  to {
    transform: scale(1);
  }
}

/* Responsive */
@media (max-width: 900px) {
  .stat-strip,
  .findings,
  .workflow,
  .track-grid,
  .team-list,
  .split,
  .status-block,
  .chart-grid {
    grid-template-columns: 1fr;
  }

  .team-list li:nth-child(odd) {
    border-right: 0;
    padding-right: 0;
  }

  .module-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem var(--space) 1rem;
    background: rgba(243, 246, 244, 0.98);
    border-bottom: 1px solid var(--line);
  }

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

  .site-nav a {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
  }

  .hero-content {
    margin-left: var(--space);
  }

  .stat-strip {
    grid-template-columns: repeat(2, 1fr);
  }

}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-media,
  .brand,
  .hero h1,
  .lede,
  .hero-actions,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}