@import url("tokens.css");

/* ============================================================
   RIVOTICS — Monad style system
   editorial tech journal on warm parchment
   ============================================================ */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-parchment);
  color: var(--color-off-black);
  font-family: var(--font-mono);
  font-size: var(--text-body);
  line-height: 1.35;
  letter-spacing: -0.025em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;          /* never bold — the serif carries it */
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0;
}

p { margin: 0; }

a { color: inherit; text-decoration: none; }

em { font-style: italic; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-32);
}

/* ---------- announcement bar ---------- */

.announce {
  background: var(--color-ink);
  color: var(--color-parchment);
  font-size: var(--text-body-sm);
  letter-spacing: -0.02em;
}

.announce-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 11px var(--spacing-32);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-16);
  flex-wrap: wrap;
}

.announce-pill {
  border: 1px solid rgba(246, 243, 241, 0.55);
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  font-size: var(--text-caption);
  text-transform: uppercase;
  letter-spacing: -0.033em;
  transition: background 160ms ease, border-color 160ms ease;
}

.announce-pill:hover {
  background: rgba(246, 243, 241, 0.12);
  border-color: var(--color-parchment);
}

/* ---------- navigation ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--color-parchment);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-24) var(--spacing-32);
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-32);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand .mark { color: var(--color-off-black); flex: none; }

.wordmark {
  font-size: var(--text-label);
  text-transform: uppercase;
  letter-spacing: -0.022em;
}

.nav-links {
  display: flex;
  gap: var(--spacing-32);
  font-size: var(--text-label);
  text-transform: uppercase;
  letter-spacing: -0.022em;
}

.nav-links a {
  color: var(--color-off-black);
  transition: color 160ms ease;
}

.nav-links a:hover { color: var(--color-smoke); }

.nav-cta { display: flex; align-items: center; gap: var(--spacing-16); }

/* ---------- pill buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border-radius: var(--radius-button);
  padding: 16px 32px;
  font-family: var(--font-mono);
  font-size: var(--text-body-sm);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.btn-sm { padding: 11px 22px; font-size: var(--text-caption); letter-spacing: -0.033em; }

/* Lake Blue is the ONE saturated fill on the page — the contact CTA */
.btn-blue { background: var(--color-lake-blue); color: var(--color-parchment); }
.btn-blue:hover { background: #2249b4; }

.btn-black { background: var(--color-off-black); color: var(--color-parchment); }
.btn-black:hover { background: #000; }

.btn-ghost {
  background: transparent;
  color: var(--color-off-black);
  border-color: var(--color-off-black);
}
.btn-ghost:hover { background: var(--color-off-black); color: var(--color-parchment); }

.btn .arrow { font-size: 11px; transform: translateY(-0.5px); }

/* ---------- section scaffolding ---------- */

.band { padding: var(--spacing-80) 0; }

.band + .band { padding-top: 0; }

.section-label {
  font-size: var(--text-caption);
  text-transform: uppercase;
  letter-spacing: -0.033em;
  color: var(--color-smoke);
  padding-bottom: var(--spacing-24);
  margin-bottom: var(--spacing-40);
  border-bottom: 1px solid var(--color-ash);
}

.section-intro {
  font-family: var(--font-serif);
  font-size: var(--text-heading-lg);
  letter-spacing: -0.02em;
  line-height: 1.2;
  max-width: 22ch;
  margin-bottom: var(--spacing-64);
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: var(--spacing-80) 0 var(--spacing-72);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-32);
  position: relative;
  z-index: 1;
  text-align: center;
}

/* atmospheric wash — coral → sky, heavily blurred, never sharp */
.wash {
  position: absolute;
  border-radius: 50%;
  filter: blur(75px);
  opacity: 0.8;
  pointer-events: none;
}

.wash-a {
  width: 520px; height: 340px;
  top: -80px; left: 50%;
  transform: translateX(-62%);
  background: linear-gradient(120deg, var(--color-coral), var(--color-sky-blue));
  opacity: 0.38;
}

.wash-b {
  width: 460px; height: 300px;
  top: 40px; left: 50%;
  transform: translateX(6%);
  background: linear-gradient(200deg, var(--color-sky-blue), var(--color-mint));
  opacity: 0.32;
}

.hero-spec {
  display: inline-block;
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-pill);
  background: var(--color-parchment);
  padding: 10px 20px;
  font-size: var(--text-caption);
  text-transform: uppercase;
  letter-spacing: -0.033em;
  color: var(--color-graphite);
  margin-bottom: var(--spacing-32);
}

.hero h1 {
  font-size: var(--text-display);
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-24);
}

.hero-sub {
  font-size: var(--text-body-lg);
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--color-graphite);
  max-width: 62ch;
  margin: 0 auto var(--spacing-40);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-16);
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- capability cards ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: var(--spacing-24);
}

.card {
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-card);
  padding: var(--spacing-40);
  background: var(--color-parchment);
  /* no shadow — borders and surface contrast do the elevation */
}

.card-tag {
  display: block;
  font-size: var(--text-caption);
  text-transform: uppercase;
  letter-spacing: -0.033em;
  color: var(--color-smoke);
  margin-bottom: var(--spacing-24);
}

.card h3 {
  font-size: var(--text-subheading);
  margin-bottom: 12px;
}

.card p {
  font-size: var(--text-body);
  line-height: 1.35;
  letter-spacing: -0.025em;
  color: var(--color-graphite);
}

/* the one coloured card — draws the eye, spans wide */
.card-feature {
  grid-column: 1 / -1;
  background: var(--color-periwinkle-mist);
  border-color: transparent;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--spacing-40);
  align-items: center;
}

.card-feature .card-tag { color: #5c6a8f; }
.card-feature h3 { font-size: var(--text-heading); }
.card-feature p { color: #3b4356; font-size: var(--text-body-lg); }

.feature-art {
  position: relative;
  height: 240px;
  border-radius: 28px;
  overflow: hidden;
  background: #e3ebfa;
}

.feature-art-svg { display: block; width: 100%; height: 100%; }

/* slow drift of the two blurred colour fields */
.drift { animation: drift 18s ease-in-out infinite alternate; transform-origin: 50% 50%; }

@keyframes drift {
  from { transform: translate(-10px, 6px) scale(1); }
  to   { transform: translate(14px, -8px) scale(1.06); }
}

.mem-shapes { animation: memBreathe 12s ease-in-out infinite alternate; transform-origin: 50% 50%; }

@keyframes memBreathe {
  from { opacity: 0.55; transform: scale(0.98) rotate(-1deg); }
  to   { opacity: 0.9;  transform: scale(1.02) rotate(1deg); }
}

/* ---------- pipeline diagram ---------- */

.pipeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-24);
  margin-top: var(--spacing-40);
}

/* soft mint glow at the centre hub */
.pipeline::before {
  content: "";
  position: absolute;
  width: 320px; height: 200px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-mint);
  filter: blur(80px);
  opacity: 0.45;
  pointer-events: none;
}

.stage {
  position: relative;
  z-index: 1;
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-card);
  padding: var(--spacing-40);
  background: var(--color-parchment);
}

/* thin connecting line between nodes */
.stage + .stage::before {
  content: "";
  position: absolute;
  top: 50%;
  left: calc(var(--spacing-24) * -1);
  width: var(--spacing-24);
  height: 1px;
  background: var(--color-ash);
}

.node {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-pill);
  background: var(--color-parchment);
  padding: 12px 20px;
  font-size: var(--text-body-sm);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-24);
}

.node .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--color-lake-blue);
  flex: none;
}

.stage h3 { font-size: var(--text-subheading); margin-bottom: 12px; }

.stage p {
  font-size: var(--text-body);
  line-height: 1.35;
  letter-spacing: -0.025em;
  color: var(--color-graphite);
}

/* ---------- team overview ---------- */

.team-overview {
  display: grid;
  grid-template-columns: 1fr 460px;
  gap: var(--spacing-64);
  align-items: center;
  padding-bottom: var(--spacing-64);
  margin-bottom: var(--spacing-64);
  border-bottom: 1px solid var(--color-ash);
}

.team-copy p {
  font-size: var(--text-body);
  line-height: 1.55;
  letter-spacing: -0.025em;
  color: var(--color-graphite);
}

.team-copy p + p { margin-top: var(--spacing-24); }

.team-lead {
  font-family: var(--font-serif);
  font-size: var(--text-subheading);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-off-black) !important;
}

.team-cards { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* parallel-lanes illustration */

.lanes-svg { display: block; width: 100%; height: auto; }

.lane-label text {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: -0.033em;
  fill: var(--color-smoke);
}

/* tasks fill their lane in sequence, overlapping where they run in parallel */
.bar {
  transform-origin: left center;
  animation: barIn 900ms cubic-bezier(.22,.7,.3,1) infinite alternate;
  animation-delay: var(--d, 0ms);
}

@keyframes barIn {
  0%, 12%  { transform: scaleX(0.04); opacity: 0.35; }
  60%, 100% { transform: scaleX(1);   opacity: 1; }
}

.playhead { animation: sweep 5.2s cubic-bezier(.4,0,.5,1) infinite; }

@keyframes sweep {
  0%        { transform: translateX(0);     opacity: 0; }
  8%        { opacity: 1; }
  85%       { transform: translateX(320px); opacity: 1; }
  100%      { transform: translateX(320px); opacity: 0; }
}

/* ---------- etymology ---------- */

.etymology {
  font-family: var(--font-serif);
  font-size: var(--text-heading);
  letter-spacing: -0.02em;
  line-height: 1.2;
  max-width: 30ch;
  color: var(--color-off-black);
}

.etymology em { color: var(--color-graphite); }

/* ---------- contact ---------- */

.contact { text-align: center; padding-bottom: var(--spacing-80); }

.contact .section-label { text-align: left; }

.contact h2 {
  font-size: var(--text-heading-lg);
  margin-bottom: var(--spacing-16);
}

.contact-sub {
  font-size: var(--text-body-lg);
  color: var(--color-graphite);
  letter-spacing: -0.02em;
  max-width: 52ch;
  margin: 0 auto var(--spacing-40);
}

/* ---------- footer ---------- */

.footer { border-top: 1px solid var(--color-ash); }

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-32);
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-24);
  flex-wrap: wrap;
  font-size: var(--text-caption);
  text-transform: uppercase;
  letter-spacing: -0.033em;
  color: var(--color-smoke);
}

.footer-links { display: flex; gap: var(--spacing-24); }
.footer-links a:hover { color: var(--color-off-black); }

/* ---------- hero pipeline diagram ---------- */

.diagram-wrap {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: var(--spacing-80) auto 0;
  padding: 0 var(--spacing-32);
}

.diagram { display: block; width: 100%; height: auto; }

.svg-node-text {
  font-family: var(--font-mono);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  fill: var(--color-off-black);
}

.svg-label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: -0.033em;
  fill: var(--color-smoke);
}

/* nodes fade up in sequence, left to right */
.svg-node {
  opacity: 0;
  animation: nodeIn 620ms cubic-bezier(.22,.7,.3,1) forwards;
  animation-delay: calc(var(--d, 0ms) + 500ms);
}

@keyframes nodeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* data travelling along the curved paths */
.flow-pulse use {
  stroke-dasharray: 46 380;
  stroke-dashoffset: 426;
  animation: pulse 3.4s linear infinite;
}

.flow-pulse use:nth-child(2) { animation-delay: .5s; }
.flow-pulse use:nth-child(3) { animation-delay: 1s; }
.flow-pulse use:nth-child(4) { animation-delay: 1.7s; }
.flow-pulse use:nth-child(5) { animation-delay: 2.1s; }
.flow-pulse use:nth-child(6) { animation-delay: 2.5s; }

@keyframes pulse { to { stroke-dashoffset: 0; } }

/* the router hub breathes a single blue ring */
.hub-ring {
  transform-origin: 600px 180px;
  animation: ring 3.4s ease-out infinite;
}

@keyframes ring {
  0%   { transform: scale(1);    opacity: 0.85; }
  70%  { transform: scale(1.42); opacity: 0; }
  100% { transform: scale(1.42); opacity: 0; }
}

.mark-dot { animation: markPulse 3.4s ease-in-out infinite; transform-origin: 23px 20.5px; }

@keyframes markPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .55; transform: scale(.82); }
}

/* ---------- name section illustration ---------- */

.name-split {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: var(--spacing-64);
  align-items: center;
}

.stream-svg { display: block; width: 100%; height: auto; }

.stream-pulse path {
  stroke-dasharray: 40 340;
  stroke-dashoffset: 380;
  animation: pulse 4s linear infinite;
}

.stream-pulse path:nth-child(2) { animation-delay: .8s; }
.stream-pulse path:nth-child(3) { animation-delay: 1.6s; }

.stream-ring {
  transform-origin: 210px 130px;
  animation: ring 4s ease-out infinite;
}

/* ---------- entrance motion ---------- */

.reveal {
  opacity: 0;
  animation: riseIn 720ms cubic-bezier(.22,.7,.3,1) forwards;
  animation-delay: var(--d, 0ms);
}

.reveal-up {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 640ms cubic-bezier(.22,.7,.3,1) var(--d, 0ms),
              transform 640ms cubic-bezier(.22,.7,.3,1) var(--d, 0ms);
}

.reveal-up.in { opacity: 1; transform: none; }

@keyframes riseIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- focus ---------- */

a:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--color-lake-blue);
  outline-offset: 3px;
  border-radius: var(--radius-pill);
}

/* ---------- responsive ---------- */

@media (max-width: 1040px) {
  .hero h1 { font-size: var(--text-heading-lg); }
  .section-intro { font-size: var(--text-heading); }
  .name-split { grid-template-columns: 1fr; gap: var(--spacing-40); }
  .card-feature { grid-template-columns: 1fr; }
  .card-feature h3 { font-size: var(--text-heading-sm); }
  .pipeline { grid-template-columns: 1fr; }
  .stage + .stage::before {
    top: calc(var(--spacing-24) * -1);
    left: 50%;
    width: 1px;
    height: var(--spacing-24);
  }
  .team-overview { grid-template-columns: 1fr; gap: var(--spacing-40); }
}

@media (max-width: 720px) {
  .wrap, .nav-inner, .hero-inner, .footer-inner, .announce-inner { padding-left: var(--spacing-24); padding-right: var(--spacing-24); }
  .nav-links { display: none; }
  .hero h1 { font-size: var(--text-heading); }
  .hero-sub { font-size: var(--text-body); }
  .etymology { font-size: var(--text-heading-sm); }
  .team-lead { font-size: var(--text-body-lg); }
  .contact h2 { font-size: var(--text-heading-sm); }
  .card, .stage { padding: var(--spacing-32); }
  .band { padding: var(--spacing-64) 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
  .reveal, .reveal-up, .svg-node { opacity: 1; transform: none; }
}