/* ============================================
   M idea — ON-US Acceleration Programme
   Shared stylesheet
   ============================================ */

:root {
  --bg: #ffffff;
  --ink: #282F38;
  --ink-60: rgba(40, 47, 56, 0.6);
  --ink-40: rgba(40, 47, 56, 0.4);
  --ink-15: rgba(40, 47, 56, 0.15);
  --ink-08: rgba(40, 47, 56, 0.08);
  --ink-04: rgba(40, 47, 56, 0.04);
  --accent: #30C9A6;
  --accent-10: rgba(48, 201, 166, 0.1);
  --accent-20: rgba(48, 201, 166, 0.2);
  --serif: 'Fraunces', 'Times New Roman', serif;
  --sans: 'Geist', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'Geist Mono', 'SF Mono', Menlo, monospace;
  --container: 1320px;
  --gutter: clamp(1.25rem, 3vw, 2.5rem);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ============================================
   GRAIN OVERLAY
   ============================================ */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.025;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--ink-08);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1.1rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.nav-logo-mark {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--serif);
  font-weight: 600;
  font-style: italic;
  border-radius: 2px;
}

.nav-logo-mark svg { width: 100%; height: 100%; }

.nav-links {
  display: flex;
  gap: 2.25rem;
  font-size: 0.82rem;
  font-weight: 450;
  letter-spacing: 0.02em;
}

.nav-links a {
  position: relative;
  padding: 0.25rem 0;
  color: var(--ink-60);
  transition: color 0.2s ease;
}

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

.nav-links a.active { color: var(--ink); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.3rem;
  height: 2px;
  background: var(--accent);
}

.nav-cta {
  padding: 0.55rem 1.1rem;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: 2px;
  transition: background 0.2s ease;
}

.nav-cta:hover { background: var(--accent); color: var(--ink); }

@media (max-width: 840px) {
  .nav-links { display: none; }
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-60);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.eyebrow::before {
  content: '';
  width: 18px;
  height: 1px;
  background: var(--accent);
}

.display {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(2.8rem, 7vw, 6.5rem);
  line-height: 0.95;
  letter-spacing: -0.035em;
  color: var(--ink);
}

.display em {
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
}

.display-sm {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(2rem, 4.5vw, 3.75rem);
  line-height: 1;
  letter-spacing: -0.03em;
}

.display-sm em { font-style: italic; color: var(--accent); font-weight: 300; }

.lead {
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  line-height: 1.55;
  color: var(--ink-60);
  max-width: 52ch;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 1.6rem;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: 2px;
  transition: all 0.25s ease;
}

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

.btn-primary:hover {
  background: var(--accent);
  color: var(--ink);
  transform: translateY(-1px);
}

.btn-ghost {
  border: 1px solid var(--ink-15);
  color: var(--ink);
}

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

.btn svg {
  transition: transform 0.25s ease;
}

.btn:hover svg { transform: translateX(3px); }

/* ============================================
   FOOTER
   ============================================ */
.footer {
  margin-top: 8rem;
  padding: 3rem 0 2.5rem;
  border-top: 1px solid var(--ink-08);
  font-size: 0.8rem;
  color: var(--ink-60);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-mark {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--ink);
}

/* ============================================
   SCROLL REVEAL
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s cubic-bezier(0.2, 0.8, 0.2, 1),
              transform 0.9s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }
.reveal[data-delay="5"] { transition-delay: 0.4s; }

/* ============================================
   TICKER
   ============================================ */
.ticker {
  overflow: hidden;
  border-top: 1px solid var(--ink-08);
  border-bottom: 1px solid var(--ink-08);
  padding: 1rem 0;
  background: var(--ink-04);
}

.ticker-track {
  display: flex;
  white-space: nowrap;
  animation: ticker-scroll 50s linear infinite;
  gap: 3.5rem;
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--ink-60);
}

.ticker-item .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.ticker-item strong {
  color: var(--ink);
  font-weight: 500;
}

@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============================================
   UTILITY
   ============================================ */
.hr-thin {
  height: 1px;
  background: var(--ink-08);
  border: none;
  margin: 4rem 0;
}

.kbd {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  background: var(--ink-08);
  border-radius: 3px;
  color: var(--ink);
}

::selection {
  background: var(--accent);
  color: var(--ink);
}