/* ============================================
   SERIDEO AI — DESIGN TOKENS
   Hero uses the Trajectory-matched dawn-sky gradient.
   Everything past the hero uses a calmer paper palette
   (cream / aged paper yellow / white) with a steel-blue
   accent, so the site reads as a global, professional
   data company rather than a single-tone landing page.
   ============================================ */

:root {
  /* Hero sky (Trajectory-matched) */
  --sky-peach: #F2A876;
  --sky-peach-soft: #F6C39D;
  --sky-peach-deep: #E8935F;
  --sky-lavender: #C7B8D9;
  --sky-cream: #FBF3E7;

  /* Paper palette used everywhere past the hero */
  --paper-white: #FFFFFF;
  --paper-cream: #FBF8F1;
  --paper-yellow: #F5EEDA;
  --paper-line: rgba(30, 42, 60, 0.10);
  --paper-line-strong: rgba(30, 42, 60, 0.20);

  /* Ink and accent */
  --ink-navy: #1E2A3C;
  --navy-soft: #33465F;
  --accent-blue: #2F5C7A;
  --accent-blue-soft: #6C93AC;

  /* Text */
  --text-primary: var(--ink-navy);
  --text-muted: #5B6C82;
  --text-inverse: var(--paper-white);

  /* Surfaces */
  --bg-page: var(--paper-cream);
  --bg-card: var(--paper-white);
  --bg-dark: var(--ink-navy);

  /* Type */
  --font-display: 'Fraunces', 'Georgia', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  /* Scale */
  --fs-hero: clamp(2.2rem, 7vw, 4rem);
  --fs-h1: clamp(2rem, 5vw, 3rem);
  --fs-h2: clamp(1.5rem, 4vw, 2.1rem);
  --fs-h3: clamp(1.15rem, 3vw, 1.4rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-tiny: 0.75rem;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.75rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --space-2xl: 8rem;

  /* Shape */
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 0.25s;
  --dur-med: 0.6s;
  --dur-slow: 1.4s;

  /* Layout */
  --container-max: 1180px;
  --nav-h: 84px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-page);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; color: inherit; }

.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-md); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-tiny);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-blue);
  font-weight: 600;
}

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

:focus-visible { outline: 2.5px solid var(--ink-navy); outline-offset: 3px; border-radius: 4px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 1.6rem; border-radius: var(--radius-pill);
  font-weight: 600; font-size: var(--fs-small);
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), background var(--dur-fast);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--ink-navy); color: var(--paper-white);
  box-shadow: 0 8px 20px -8px rgba(30, 42, 60, 0.45);
}
.btn-primary:hover { background: var(--navy-soft); transform: translateY(-2px); box-shadow: 0 12px 24px -8px rgba(30, 42, 60, 0.5); }

.btn-accent {
  background: var(--sky-peach-deep); color: var(--paper-white);
  box-shadow: 0 8px 20px -8px rgba(232, 147, 95, 0.55);
}
.btn-accent:hover { background: var(--sky-peach); transform: translateY(-2px); }

.btn-blue { background: var(--accent-blue); color: var(--paper-white); }
.btn-blue:hover { background: var(--accent-blue-soft); transform: translateY(-2px); }

.btn-ghost { background: transparent; border: 1.5px solid var(--paper-line-strong); color: var(--ink-navy); }
.btn-ghost:hover { background: var(--paper-white); border-color: var(--ink-navy); }

.btn-block { width: 100%; justify-content: center; }