/* ==========================================================================
   Base / Reset
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-fg);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; height: auto; }

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

a { color: var(--color-fg); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: color-mix(in srgb, var(--color-fg) 30%, transparent); transition: text-decoration-color var(--dur) var(--ease); }
a:hover { text-decoration-color: var(--color-fg); }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: var(--leading-tight);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--color-fg);
}

h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); }
h4 { font-size: var(--text-h4); }

p { max-width: 65ch; }

::selection { background: var(--orchid); color: var(--dusk); }

/* ==========================================================================
   Layout primitives
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(3.5rem, 8vw, 6rem); padding-inline: clamp(1rem, 4vw, 1.5rem); }
.section-lg { padding-block: clamp(5rem, 10vw, 8rem); padding-inline: clamp(1rem, 4vw, 1.5rem); }

.stack > * + * { margin-top: var(--space-4); }

/* Screen-reader-only utility for headings that are structural but not visually rendered */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}
.stack-lg > * + * { margin-top: var(--space-8); }

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--text-body);
  line-height: 1;
  text-decoration: none;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--dusk); color: var(--dawn); }
.btn-primary:hover { background: color-mix(in srgb, var(--dusk) 88%, var(--orchid)); }

.btn-orchid { background: var(--orchid); color: var(--dusk); }
.btn-orchid:hover { background: var(--orchid-deep); color: var(--dawn); }

.btn-ghost { background: transparent; color: var(--dusk); border: 1.5px solid color-mix(in srgb, var(--dusk) 15%, transparent); }
.btn-ghost:hover { border-color: var(--dusk); background: color-mix(in srgb, var(--dusk) 4%, transparent); }

.btn-sm { padding: 10px 20px; font-size: var(--text-small); }
.btn-lg { padding: 18px 36px; font-size: var(--text-body-lg); }

/* ==========================================================================
   Cards & speech-bubble surfaces
   ========================================================================== */

.surface {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}
.surface-elevated {
  background: var(--dawn);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
}

.card {
  background: var(--dawn);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid color-mix(in srgb, var(--dusk) 8%, transparent);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.card-orchid { background: var(--lavender); }
.card-ocean { background: var(--seafoam); }
.card-sun { background: var(--sand); }
.card-sky { background: var(--reflection); }
.card-shell { background: var(--shell); }
.card-dusk { background: var(--dusk); color: var(--dawn); }
.card-dusk h1, .card-dusk h2, .card-dusk h3, .card-dusk h4 { color: var(--dawn); }

/* ==========================================================================
   Type utilities
   ========================================================================== */

.eyebrow {
  font-size: var(--text-label);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: color-mix(in srgb, var(--dusk) 60%, transparent);
}
.lede { font-size: var(--text-body-lg); line-height: var(--leading-snug); max-width: 60ch; }

/* Handwritten underline mark - uses the Underscore.png motif */
.underline-mark {
  background-image: url('/assets/illustrations/underscore.png');
  background-repeat: no-repeat;
  background-position: bottom center;
  background-size: 100% 0.4em;
  padding-bottom: 0.15em;
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

:focus-visible {
  outline: 3px solid var(--orchid);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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