/* Tensora — design tokens (OKLCH) */
:root {
  --bg: oklch(0.975 0.004 95);
  --surface: oklch(0.95 0.012 75);
  --ink: oklch(0.22 0.018 75);
  --ink-muted: oklch(0.42 0.02 75);
  --brand: oklch(0.62 0.16 48);
  --brand-ink: oklch(0.985 0.01 75);
  --brand-deep: oklch(0.32 0.08 48);
  --line: oklch(0.85 0.015 75);

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Public Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6.5rem;

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }
html { color-scheme: light; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.12;
  text-wrap: balance;
  margin: 0;
}

p {
  margin: 0;
  max-width: 65ch;
  text-wrap: pretty;
}

.wrap {
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--space-3);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: oklch(0.975 0.004 95 / 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: 4.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
}

.brand-mark {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 0.4rem;
  background: var(--brand);
  position: relative;
  flex-shrink: 0;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 0.4rem;
  border-radius: 0.15rem;
  background: var(--brand-ink);
  opacity: 0.85;
}

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

.main-nav a {
  text-decoration: none;
  font-size: 0.9375rem;
  color: var(--ink-muted);
  transition: color 0.2s var(--ease-out-expo);
}
.main-nav a:hover { color: var(--ink); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 0.5rem;
  padding: 0.7rem 1.25rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease-out-expo), background-color 0.2s var(--ease-out-expo), border-color 0.2s var(--ease-out-expo);
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { background: var(--brand-deep); }

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--ink-muted); }

.btn-text {
  padding: 0.7rem 0;
  color: var(--ink-muted);
}
.btn-text:hover { color: var(--ink); }

/* ---------- Hero ---------- */

.hero {
  padding-block: var(--space-6) var(--space-5);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-5);
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.25rem, 1.55rem + 3vw, 3.75rem);
  letter-spacing: -0.03em;
}

.hero-lede {
  margin-top: var(--space-3);
  font-size: 1.0625rem;
  color: var(--ink-muted);
  max-width: 56ch;
}

.hero-actions {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.hero-figure {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: var(--space-3);
}

.flow-svg { width: 100%; height: auto; }

.node {
  fill: var(--bg);
  stroke: var(--line);
  stroke-width: 1.25;
}
.node-b {
  fill: var(--brand);
  stroke: var(--brand);
}
.node-c {
  fill: var(--ink);
  stroke: var(--ink);
}
.node-label {
  font-family: var(--font-mono);
  font-size: 11px;
}
.node-sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
}
.label-dark { fill: var(--ink); }
.label-light { fill: var(--brand-ink); }
.label-light.node-sub { fill-opacity: 0.78; }

.flow-line {
  fill: none;
  stroke: var(--ink-muted);
  stroke-width: 1.25;
  stroke-dasharray: 4 4;
  opacity: 0.55;
}

/* ---------- Stats strip ---------- */

.strip {
  background: var(--ink);
  color: var(--brand-ink);
  padding-block: var(--space-4);
}

.strip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.strip-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.strip-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--brand);
}

.strip-label {
  font-size: 0.875rem;
  color: oklch(0.985 0.01 75 / 0.72);
  max-width: 32ch;
}

/* ---------- Section heads ---------- */

.section-head {
  max-width: 60ch;
  margin-bottom: var(--space-5);
}
.section-head h2 {
  font-size: clamp(1.75rem, 1.4rem + 1.4vw, 2.5rem);
  margin-bottom: var(--space-2);
}
.section-head p {
  color: var(--ink-muted);
  font-size: 1.0625rem;
}

/* ---------- Platform rows (deliberately not a card grid) ---------- */

.platform { padding-block: var(--space-6); }

.platform-list {
  display: flex;
  flex-direction: column;
}

.platform-row {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-top: 1px solid var(--line);
}
.platform-row:last-child { border-bottom: 1px solid var(--line); }

.platform-num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--brand-deep);
  letter-spacing: 0.02em;
  padding-top: 0.3rem;
}

.platform-row h3 {
  font-size: 1.375rem;
  margin-bottom: 0.6rem;
  max-width: 40ch;
}

.platform-row p {
  color: var(--ink-muted);
}

/* ---------- Pipeline steps ---------- */

.pipeline {
  background: var(--surface);
  padding-block: var(--space-6);
  border-block: 1px solid var(--line);
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  gap: var(--space-3);
}

.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 3.25rem;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.15rem;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--brand-deep);
}

.steps h3 {
  font-size: 1.1875rem;
  margin-bottom: 0.35rem;
}

.steps p {
  color: var(--ink-muted);
  max-width: 62ch;
}

/* ---------- Cases ---------- */

.cases { padding-block: var(--space-6); }

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-4);
}

.case {
  border-left: none;
  border-top: 2px solid var(--brand);
  padding-top: var(--space-3);
}

.case-quote {
  font-family: var(--font-display);
  font-size: 1.1875rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--ink);
}

.case-meta {
  margin-top: var(--space-2);
  font-size: 0.875rem;
  color: var(--ink-muted);
}

/* ---------- Team ---------- */

.team {
  background: var(--surface);
  padding-block: var(--space-6);
  border-block: 1px solid var(--line);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
}

.member {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: var(--space-3);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 0.6rem;
}

.member-name {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 500;
}

.member-role {
  font-size: 0.875rem;
  color: var(--ink-muted);
}

/* ---------- Contact ---------- */

.contact { padding-block: var(--space-6); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: start;
}

.contact h2 {
  font-size: clamp(1.75rem, 1.4rem + 1.4vw, 2.5rem);
  margin-bottom: var(--space-2);
}

.contact > .wrap > div > p {
  color: var(--ink-muted);
  font-size: 1.0625rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--ink-muted);
}

.contact-form input,
.contact-form textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 0.7rem 0.9rem;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px oklch(0.62 0.16 48 / 0.18);
}

.contact-form button { align-self: flex-start; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: var(--space-3);
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  font-size: 0.875rem;
  color: var(--ink-muted);
}

.footer-row a {
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 0.2em;
}

.footer-sep { opacity: 0.5; }

/* ---------- Reveal-on-scroll ---------- */

[data-reveal] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
  }
  [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 880px) {
  .main-nav { display: none; }
  .hero-grid,
  .contact-grid { grid-template-columns: 1fr; }
  .hero-figure { order: -1; }
  .platform-row { grid-template-columns: 1fr; gap: 0.4rem; }
  .platform-num { padding-top: 0; }
}