/* ==========================================================================
   BASE — design tokens, resets, typography
   ========================================================================== */

@font-face {
  font-family: 'Space Grotesk';
  src: url('../fonts/SpaceGrotesk-Variable.woff2') format('woff2');
  font-weight: 300 700;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-Variable.woff2') format('woff2');
  font-weight: 300 700;
  font-display: swap;
}

:root{
  /* ---- color tokens ---- */
  --bg:            #09090B;
  --bg-raised:     #0D0D10;
  --card:          #111827;
  --card-hover:    #141C2E;
  --border:        #1F2937;
  --border-soft:   rgba(255,255,255,0.06);

  --accent:        #4F46E5;
  --accent-soft:   rgba(79,70,229,0.14);
  --accent-2:      #22D3EE;
  --accent-2-soft: rgba(34,211,238,0.14);

  --text:          #F5F5F7;
  --text-muted:    #A1A1AA;
  --text-faint:    #7C838C;

  --gradient-signal: linear-gradient(120deg, var(--accent), var(--accent-2));

  /* ---- type ---- */
  --font-display: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --font-body:    'Inter', ui-sans-serif, system-ui, sans-serif;

  /* ---- layout ---- */
  --container: 1180px;
  --gutter: clamp(24px, 5vw, 64px);
  --section-y: clamp(88px, 12vw, 160px);

  /* ---- motion ---- */
  --ease-out: cubic-bezier(.16,1,.3,1);
  --ease-in-out: cubic-bezier(.65,0,.35,1);
  --dur-fast: 0.28s;
  --dur-mid: 0.6s;
  --dur-slow: 1s;
}

*, *::before, *::after{ box-sizing: border-box; }
html{
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
button{ font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul{ margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4,p{ margin: 0; }

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

section{ position: relative; }

/* eyebrow label used across sections */
.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 18px;
}
.eyebrow::before{
  content: '';
  width: 22px;
  height: 1px;
  background: var(--gradient-signal);
}

.section-head{
  max-width: 640px;
  margin-bottom: clamp(40px, 6vw, 72px);
}
.section-head h2{
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(32px, 4.2vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}
.section-head p{
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.7;
}

/* focus visibility */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible{
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
  border-radius: 4px;
}

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

/* scrollbar (webkit) */
::-webkit-scrollbar{ width: 10px; }
::-webkit-scrollbar-track{ background: var(--bg); }
::-webkit-scrollbar-thumb{ background: var(--border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover{ background: var(--text-faint); }

/* reveal-on-scroll base state */
[data-reveal]{
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.42s var(--ease-out), transform 0.42s var(--ease-out);
}
[data-reveal].is-visible{
  opacity: 1;
  transform: translateY(0);
}
[data-reveal-delay="1"]{ transition-delay: 0.05s; }
[data-reveal-delay="2"]{ transition-delay: 0.1s; }
[data-reveal-delay="3"]{ transition-delay: 0.15s; }
[data-reveal-delay="4"]{ transition-delay: 0.2s; }

@media (prefers-reduced-motion: reduce){
  [data-reveal]{ opacity: 1; transform: none; }
}

.visually-hidden{
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link{
  position: absolute;
  left: 16px; top: -60px;
  background: var(--accent);
  color: #fff;
  padding: 12px 18px;
  border-radius: 8px;
  z-index: 999;
  transition: top 0.2s var(--ease-out);
  font-size: 14px;
  font-weight: 600;
}
.skip-link:focus{ top: 16px; }