theme.css

/*
  Site theme — source of truth for new pages and sections.

  Use these tokens instead of new hex/px values. Compose primitives:

    .section    centered content measure + padding (like About)
    .prose      body copy size, leading, paragraph spacing
    .display    Fraunces brand heading
    .headline   Outfit medium subhead
    .lede       supporting text
    .btn        primary CTA (teal, square, foam label)
    .rise-in    enter animation; set --delay for stagger

  Example:
    <section class="section prose">
      <h2 class="headline">Title</h2>
      <p class="lede">Supporting line.</p>
      <p>Body copy.</p>
      <a class="btn" href="#next">Continue</a>
    </section>
*/

:root {
  /* Color: surfaces */
  --ink: #132029;
  --ink-soft: #3d4f5c;
  --paper: #f3f6f4;
  --paper-deep: #e4ebe6;
  --mist: #d7e8e2;
  --haze: #dce3e8;

  /* Color: accent */
  --accent: #1a6b5c;
  --accent-hover: #145247;

  /* Color: hero / overlay */
  --foam: #f4f7f5;
  --foam-strong: #fff;
  --foam-rgb: 244, 247, 245;
  --veil: #0a161c;
  --veil-rgb: 10, 22, 28;

  --hero-veil: linear-gradient(
    105deg,
    rgba(var(--veil-rgb), 0.82) 0%,
    rgba(var(--veil-rgb), 0.55) 42%,
    rgba(var(--veil-rgb), 0.18) 100%
  );
  --hero-veil-mobile: linear-gradient(
    180deg,
    rgba(var(--veil-rgb), 0.15) 0%,
    rgba(var(--veil-rgb), 0.35) 35%,
    rgba(var(--veil-rgb), 0.88) 100%
  );
  --page-wash:
    radial-gradient(ellipse 80% 50% at 10% 0%, var(--mist) 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 100%, var(--haze) 0%, transparent 50%),
    var(--paper);

  /* Color: semantic */
  --text: var(--ink-soft);
  --text-strong: var(--ink);
  --text-on-hero: var(--foam);
  --text-on-hero-strong: var(--foam-strong);
  --text-on-hero-soft: rgba(var(--foam-rgb), 0.92);
  --text-on-hero-muted: rgba(var(--foam-rgb), 0.8);
  --text-on-accent: var(--foam);
  --focus-ring: 2px solid var(--foam);
  --focus-offset: 3px;

  /* Type: families */
  --display: 'Fraunces', 'Times New Roman', serif;
  --sans: 'Outfit', 'Segoe UI', sans-serif;

  /* Type: sizes, leading, tracking, weight */
  --font-size-body: 18px;
  --leading-body: 1.55;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;

  --font-size-display: clamp(2.75rem, 7vw, 4.75rem);
  --leading-display: 1.05;
  --tracking-display: -0.03em;

  --font-size-headline: clamp(1.15rem, 2.4vw, 1.45rem);
  --leading-headline: 1.3;
  --tracking-headline: 0.01em;

  --font-size-lede: clamp(1rem, 1.8vw, 1.125rem);
  --leading-lede: 1.5;

  --font-size-cta: 0.95rem;
  --tracking-cta: 0.02em;

  --font-size-prose: clamp(1.05rem, 2vw, 1.2rem);
  --leading-prose: 1.7;

  /* Space */
  --space-xs: 0.85rem;
  --space-sm: 1.4rem;
  --space-md: 1.5rem;
  --space-lg: 1.75rem;
  --pad-hero: clamp(2rem, 6vw, 5rem);
  --pad-hero-bottom: clamp(3rem, 8vh, 5.5rem);
  --pad-section: clamp(3.5rem, 10vw, 6.5rem) clamp(1.5rem, 5vw, 2.5rem);
  --btn-pad: 0.85rem 1.4rem;

  /* Layout */
  --measure: 42rem;
  --measure-hero: 40rem;
  --measure-narrow: 28rem;
  --page-min: 320px;
  --hero-min: 100svh;
  --hero-min-mobile: 92svh;
  /* Documented for new work; media queries still use the literal 720px. */
  --breakpoint: 720px;

  /* Shape — square corners, no elevation */
  --radius: 0;
  --shadow: none;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 200ms;
  --duration-enter: 900ms;
  --duration-enter-prose: 800ms;
  --duration-ken: 18s;
  --rise-distance: 1.1rem;
  --hover-lift: -1px;
  --ken-start: 1.06;
  --delay: 0ms;
  --stagger: 100ms;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: var(--btn-pad);
  font-size: var(--font-size-cta);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-cta);
  text-decoration: none;
  color: var(--text-on-accent);
  background: var(--accent);
  border: 1px solid transparent;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition:
    background-color var(--duration-fast) ease,
    transform var(--duration-fast) ease;
}

.btn:hover {
  background: var(--accent-hover);
  transform: translateY(var(--hover-lift));
}

.btn:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.section {
  width: min(var(--measure), 100%);
  margin: 0 auto;
  padding: var(--pad-section);
}

.prose {
  color: var(--text);
}

.prose p {
  margin: 0;
  font-size: var(--font-size-prose);
  line-height: var(--leading-prose);
  color: var(--text);
}

.prose p + p {
  margin-top: var(--space-md);
}

.display {
  margin: 0;
  font-family: var(--display);
  font-size: var(--font-size-display);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
}

.headline {
  margin: 0;
  font-family: var(--sans);
  font-size: var(--font-size-headline);
  font-weight: var(--weight-medium);
  line-height: var(--leading-headline);
  letter-spacing: var(--tracking-headline);
}

.lede {
  margin: 0;
  max-width: var(--measure-narrow);
  font-size: var(--font-size-lede);
  line-height: var(--leading-lede);
}

.rise-in {
  animation: rise-in var(--duration, var(--duration-enter)) var(--ease-out)
    var(--delay) both;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(var(--rise-distance));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hero-ken {
  from {
    transform: scale(var(--ken-start));
  }
  to {
    transform: scale(1);
  }
}