/* ACE 3 Ventures — base styles
   Design tokens, layout, components, motion. Plain CSS, no build step. */

:root {
  /* colour */
  --bg-base: #0a0e17;
  --bg-elevated: #10151f;
  --bg-elevated-2: #161d2b;
  --bg-alt: #0d1220;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text-primary: #eef2f8;
  --text-secondary: #a6b0c3;
  --text-tertiary: #6c7793;
  --accent-blue: #4f8cff;
  --accent-cyan: #35d6d0;
  --accent-gradient: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  --focus-ring: #7db4ff;

  /* spacing scale (4px base) */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-24: 6rem;
  --sp-32: 8rem;

  /* radius */
  --radius-card: 18px;
  --radius-btn: 999px;
  --radius-tag: 8px;

  /* type */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-logo: "Sora", var(--font-sans);
  --font-logo-sub: "Space Grotesk", var(--font-sans);

  /* logo mark palette (scoped to the logo only, kept separate from the site accent) */
  --logo-amber: #f9b23c;
  --logo-green: #6fcb52;
  --logo-teal: #1ec6b4;
  --logo-coral: #ff6b47;
  --logo-ink: #f4f6f2;
  --logo-muted: #93a29a;

  /* motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 0.2s;
  --dur-base: 0.4s;
  --dur-slow: 0.7s;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0;
  color: var(--text-secondary);
  text-wrap: pretty;
}

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

ol, ul { margin: 0; padding: 0; list-style: none; }

button { font-family: inherit; }

/* focus visibility */
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: 6px;
}

/* skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--accent-blue);
  color: #04101f;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-tag);
  font-weight: 600;
  z-index: 200;
}
.skip-link:focus {
  left: var(--sp-4);
  top: var(--sp-4);
}

/* layout helper */
.section-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--sp-8);
}

.section {
  padding: var(--sp-32) 0;
}

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-header {
  max-width: 640px;
  margin-bottom: var(--sp-16);
}

.section-header h2 {
  font-size: clamp(1.75rem, 1.4rem + 1.6vw, 2.5rem);
  margin-bottom: var(--sp-4);
}

.section-lede {
  font-size: 1.0625rem;
  max-width: 56ch;
}

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              backdrop-filter var(--dur-base) var(--ease-out);
}

.nav.scrolled {
  background: rgba(10, 14, 23, 0.72);
  border-bottom-color: var(--border);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}

.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: var(--sp-4) var(--sp-8);
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-right: auto;
}

.logo-icon {
  width: 46px;
  height: auto;
  flex-shrink: 0;
}

.logo-text-block {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-word {
  font-family: var(--font-logo);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--logo-ink);
}

.logo-word-accent { color: var(--logo-coral); }

.logo-sub {
  font-family: var(--font-logo-sub);
  font-weight: 500;
  font-size: 0.5rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--logo-muted);
  margin-top: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color var(--dur-fast) var(--ease-out);
}

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

.nav-cta { flex-shrink: 0; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 18px;
  margin: 0 auto;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-links-mobile {
  display: none;
  flex-direction: column;
  gap: var(--sp-2);
  padding: 0 var(--sp-8) var(--sp-6);
}

.nav-links-mobile a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--border);
}

.nav-links-mobile .btn { margin-top: var(--sp-3); align-self: flex-start; }

.nav.menu-open .nav-links-mobile { display: flex; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-btn);
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-blue);
  color: #04101f;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -10px rgba(79, 140, 255, 0.55);
  background: #5f97ff;
}

.btn-primary:active { transform: translateY(0) scale(0.98); }

.btn-large { padding: var(--sp-4) var(--sp-8); font-size: 1rem; }
.btn-small { padding: var(--sp-2) var(--sp-6); font-size: 0.875rem; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: var(--sp-32) 0 var(--sp-24);
}

.hero-glow {
  position: absolute;
  top: -220px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 620px;
  background: radial-gradient(closest-side, rgba(79, 140, 255, 0.32), rgba(53, 214, 208, 0.16) 55%, transparent 75%);
  filter: blur(60px);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-kicker {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--sp-6);
}

.hero h1 {
  font-size: clamp(2.25rem, 1.6rem + 3.2vw, 4rem);
  letter-spacing: -0.035em;
  max-width: 16ch;
}

.hero-sub {
  margin-top: var(--sp-6);
  font-size: 1.1875rem;
  max-width: 52ch;
  color: var(--text-secondary);
}

.hero-actions {
  margin-top: var(--sp-8);
}

/* ---------- cards / grids ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--sp-6);
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--sp-8);
  transition: transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 14px 30px -18px rgba(0, 0, 0, 0.6);
}

.card h3 {
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-3);
}

.card p { font-size: 0.9375rem; }

/* sectors: asymmetric to reflect priority order */
.grid-sectors {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: var(--sp-6);
}

.card-primary {
  background: linear-gradient(160deg, var(--bg-elevated-2), var(--bg-elevated));
  border-color: rgba(79, 140, 255, 0.28);
}

.card-primary h3 { font-size: 1.3125rem; }

/* ---------- steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--sp-8);
}

.step {
  border-top: 1px solid var(--border-strong);
  padding-top: var(--sp-6);
}

.step-index {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent-cyan);
  margin-bottom: var(--sp-4);
}

.step h3 {
  font-size: 1.375rem;
  margin-bottom: var(--sp-3);
}

.step p { font-size: 0.9375rem; }

/* ---------- insights ---------- */
.insights-list {
  display: grid;
  gap: var(--sp-4);
}

.insight-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--sp-6);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--sp-6) var(--sp-8);
  transition: transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}

.insight-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: 0 14px 30px -18px rgba(0, 0, 0, 0.6);
}

.insight-date {
  color: var(--accent-cyan);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  min-width: 28px;
}

.insight-title-link {
  display: block;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--sp-2);
  transition: color var(--dur-fast) var(--ease-out);
}

.insight-title-link:hover { color: var(--accent-blue); }

.insight-stat {
  color: var(--accent-cyan);
  font-size: 0.9375rem;
  font-weight: 600;
}

.insight-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-btn);
  padding: var(--sp-2) var(--sp-4);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.insight-link:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.insights-empty {
  color: var(--text-tertiary);
  font-size: 0.9375rem;
}

.insights-empty a {
  color: var(--accent-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ---------- contact ---------- */
.contact-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--sp-16);
  align-items: start;
}

.contact-inner h2 { font-size: clamp(1.75rem, 1.4rem + 1.6vw, 2.5rem); margin-bottom: var(--sp-4); }
.contact-inner .section-lede { margin-bottom: var(--sp-8); }

.contact-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--sp-8);
}

.contact-card h3 { font-size: 1.0625rem; margin-bottom: var(--sp-4); }
.contact-card p { margin-bottom: var(--sp-2); font-size: 0.9375rem; }
.contact-card a:hover { color: var(--accent-blue); }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: var(--sp-12) 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}

.footer-links {
  display: flex;
  gap: var(--sp-6);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  transition: color var(--dur-fast) var(--ease-out);
}

.footer-links a:hover { color: var(--text-primary); }

.footer-copy {
  color: var(--text-tertiary);
  font-size: 0.8125rem;
  width: 100%;
  margin-top: var(--sp-4);
  border-top: 1px solid var(--border);
  padding-top: var(--sp-6);
}

/* ---------- reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
  transition-delay: calc(var(--delay, 0) * 90ms);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn-primary:hover,
  .card:hover,
  .insight-card:hover {
    transform: none;
  }
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .grid-sectors { grid-template-columns: 1fr; }
  .contact-inner { grid-template-columns: 1fr; gap: var(--sp-8); }
}

@media (max-width: 860px) {
  .nav-links,
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
}

@media (max-width: 640px) {
  .section-inner { padding: 0 var(--sp-4); }
  .section { padding: var(--sp-24) 0; }
  .hero { padding: var(--sp-24) 0 var(--sp-16); }
  .insight-card {
    grid-template-columns: 1fr;
    align-items: start;
    gap: var(--sp-3);
  }
  .insight-date { min-width: 0; }
}