/* Symbius — site styles
   Brand: Neural Signal
   Dark hero -> cream sections. Editorial, calm, Noon. */

/* ---------- Fonts (self-hosted; place woff2 files in assets/fonts/) ---------- */
@font-face {
  font-family: "DM Sans";
  src: url("assets/fonts/DMSans-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "DM Sans";
  src: url("assets/fonts/DMSans-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "DM Sans";
  src: url("assets/fonts/DMSans-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("assets/fonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("assets/fonts/JetBrainsMono-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ---------- Tokens ---------- */
:root {
  --cream: #FAF6F1;
  --cream-2: #F2ECE2;
  --teal: #0A9B80;
  --teal-deep: #04261F;
  --teal-soft: #7FE9D0;
  --amber: #C88B00;
  --ink: #1A1A17;
  --ink-2: #4A4A45;
  --ink-3: #8A8A82;
  --hero-ink: #04140F;
  --rule: rgba(26, 26, 23, 0.10);

  --font-sans: "DM Sans", system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --container: 1120px;
  --container-narrow: 760px;
  --radius: 14px;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 4px;
}

h1, h2, h3 { font-weight: 500; line-height: 1.18; letter-spacing: -0.01em; margin: 0; }
p { margin: 0 0 1em; }

.skip-link {
  position: absolute; left: -9999px; top: auto;
  background: var(--ink); color: var(--cream);
  padding: 10px 14px; border-radius: 6px;
  z-index: 100;
}
.skip-link:focus { left: 16px; top: 16px; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}
.container.narrow { max-width: var(--container-narrow); }

/* ---------- Eyebrow / mono label ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal-soft);
  margin: 0 0 18px;
}
.eyebrow.ink { color: var(--teal); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--hero-ink);
  color: var(--cream);
  min-height: 88vh;
  min-height: max(520px, 88vh);
  display: flex;
  flex-direction: column;
}
#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
}
.hero-scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(circle at 50% 48%, rgba(4,16,11,.5), rgba(4,16,11,0) 62%);
  pointer-events: none;
}

.topbar {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px clamp(20px, 4vw, 44px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cream);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 28px;
  height: 28px;
  color: var(--teal-soft);
  display: inline-flex;
}
.brand-mark svg { width: 100%; height: 100%; }
.brand-word { font-size: 17px; }

.nav-links {
  display: flex;
  gap: clamp(14px, 2.4vw, 28px);
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(250, 246, 241, 0.78);
  letter-spacing: 0.02em;
}
.nav-links a:hover {
  color: var(--cream);
  text-decoration: none;
}
@media (max-width: 640px) {
  .nav-links { display: none; }
}

.hero-inner {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: clamp(40px, 8vh, 90px) clamp(20px, 5vw, 44px) clamp(60px, 10vh, 110px);
  max-width: 900px;
  margin: 0 auto;
}
.hero-inner .eyebrow { margin-bottom: 22px; }
.headline {
  font-size: clamp(30px, 5.2vw, 56px);
  font-weight: 500;
  color: var(--cream);
  max-width: 18ch;
  margin: 0 auto 22px;
  letter-spacing: -0.015em;
}
.subtitle {
  font-size: clamp(15px, 1.4vw, 17px);
  color: rgba(250, 246, 241, 0.74);
  max-width: 56ch;
  margin: 0 auto 36px;
}

.cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 15px;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 120ms ease, background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--teal);
  color: var(--teal-deep);
}
.btn-primary:hover { background: #0BB394; }
.btn-ghost {
  background: transparent;
  color: var(--cream);
  border: 0.5px solid rgba(250, 246, 241, 0.55);
}
.btn-ghost:hover { border-color: var(--cream); }

.play-toggle {
  margin-top: 28px;
  background: transparent;
  border: 1px solid rgba(250, 246, 241, 0.35);
  color: rgba(250, 246, 241, 0.85);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
}

/* ---------- Sections (cream) ---------- */
.section {
  padding: clamp(72px, 11vh, 130px) 0;
  position: relative;
}
.section-head { margin-bottom: 44px; }
.section h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  margin: 0 0 18px;
  color: var(--ink);
}
.section .lede {
  color: var(--ink-2);
  max-width: 60ch;
  font-size: 17px;
}
.section .container.narrow p { color: var(--ink-2); }
.section .container.narrow p strong { color: var(--ink); }

.divider {
  margin: 0 auto;
  margin-top: clamp(56px, 8vh, 90px);
  max-width: var(--container);
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(10, 155, 128, 0.18) 18%,
    rgba(10, 155, 128, 0.32) 50%,
    rgba(10, 155, 128, 0.18) 82%,
    transparent 100%
  );
  position: relative;
}
.divider::before,
.divider::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
  transform: translateY(-50%);
  opacity: 0.55;
}
.divider::before { left: calc(50% - 30px); }
.divider::after  { left: calc(50% + 24px); }

/* who */
.section-who { background: var(--cream); }

/* ethos */
.section-ethos { background: var(--cream); }
.principles {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  gap: 28px;
}
@media (min-width: 720px) {
  .principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 36px 40px;
  }
}
.principles li {
  position: relative;
  padding-left: 56px;
}
.principle-id {
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--teal);
  padding: 4px 8px;
  border: 1px solid rgba(10, 155, 128, 0.35);
  border-radius: 999px;
}
.principles h3 {
  font-size: 18px;
  font-weight: 500;
  margin: 0 0 8px;
  color: var(--ink);
}
.principles p {
  margin: 0;
  color: var(--ink-2);
  font-size: 15.5px;
}

/* missions */
.section-missions { background: var(--cream); }
.missions-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 22px;
  grid-template-columns: 1fr;
}
@media (min-width: 760px) {
  .missions-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1040px) {
  .missions-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.mission-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 26px 26px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}
.mission-card:hover {
  border-color: rgba(10, 155, 128, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -20px rgba(26, 26, 23, 0.25);
}
.mission-card.is-horizon { background: var(--cream-2); }

.mission-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.mission-id {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-3);
}
.mission-status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid currentColor;
  line-height: 1;
}
.mission-status.active { color: var(--teal); }
.mission-status.horizon { color: var(--amber); }

.mission-title {
  font-size: 21px;
  font-weight: 500;
  margin: 6px 0 0;
  color: var(--ink);
}
.mission-role {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  margin: 0;
}
.mission-summary {
  margin: 6px 0 0;
  color: var(--ink-2);
  font-size: 15.5px;
}
.mission-link {
  margin-top: auto;
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--teal);
}
.mission-link::after { content: "→"; transition: transform 160ms ease; }
.mission-link:hover { text-decoration: none; }
.mission-link:hover::after { transform: translateX(3px); }

/* chat placeholder */
.section-chat { background: var(--cream); }
.chat-placeholder {
  margin-top: 22px;
  border: 1px dashed rgba(10, 155, 128, 0.5);
  background: rgba(10, 155, 128, 0.04);
  border-radius: var(--radius);
  padding: 28px 26px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ink-2);
  display: flex;
  align-items: center;
  gap: 14px;
}
.chat-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(10, 155, 128, 0.18);
}

/* connect */
.section-connect { background: var(--cream); padding-bottom: clamp(88px, 12vh, 140px); }
.connect-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.connect-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 10px;
}
.connect-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
  min-width: 180px;
}
.connect-label .lang {
  color: var(--ink-3);
  font-size: 11.5px;
  margin-left: 6px;
}
.connect-list a {
  font-family: var(--font-mono);
  font-size: 14px;
}

/* footer */
.footer {
  background: var(--hero-ink);
  color: rgba(250, 246, 241, 0.75);
  padding: 36px 0;
}
.footer-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-mark {
  color: var(--teal-soft);
  width: 22px;
  height: 22px;
}
.footer-line {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  margin: 0;
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  .btn:hover { transform: none; }
  .mission-card:hover { transform: none; }
  .mission-link:hover::after { transform: none; }
}