/* ------------------------------------------------------------------
   Base styles — reset + typography baseline
   ------------------------------------------------------------------ */

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

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  font-feature-settings: 'ss01', 'ss02';
  overflow-x: hidden;
}

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

ul[role='list'], ol[role='list'] { list-style: none; }

input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.1;
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text);
}
h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); letter-spacing: -0.012em; }
h3 { font-size: var(--text-lg); }
h4 { font-size: var(--text-base); font-weight: 600; font-family: var(--font-body); letter-spacing: 0; }

p, li, figcaption { text-wrap: pretty; max-width: 68ch; }

a {
  color: inherit;
  text-decoration-color: color-mix(in srgb, currentColor 30%, transparent);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
a:hover { text-decoration-color: currentColor; }

::selection {
  background: color-mix(in srgb, var(--color-accent) 35%, transparent);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  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;
  }
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

table { border-collapse: collapse; width: 100%; }

a, button, [role='button'], [role='link'], input, textarea, select {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}

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

/* Type helpers */
.eyebrow {
  font-family: var(--font-eyebrow);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-accent);
}
.eyebrow--muted { color: var(--color-text-muted); }
.lead {
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--color-text-muted);
  max-width: 60ch;
}
.display {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.02em;
}
.numbered {
  font-feature-settings: 'tnum' 1, 'lnum' 1;
}

/* Containers */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--wide { max-width: var(--content-wide); }
.container--narrow { max-width: var(--content-narrow); }

/* Section spacing */
section, .section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}
.section--tight { padding-block: clamp(var(--space-12), 6vw, var(--space-20)); }

/* Section heads */
.section-head {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
  max-width: 760px;
}
.section-head h2 {
  font-size: var(--text-2xl);
  letter-spacing: -0.018em;
}
.section-head .lead { margin-top: var(--space-1); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.85rem 1.4rem;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--radius-full);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 1px 0 rgba(255,255,255,0.2) inset, 0 6px 16px rgba(180,106,60,0.25);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  text-decoration: none;
}
.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--secondary:hover {
  background: color-mix(in srgb, var(--color-text) 6%, transparent);
  text-decoration: none;
}
.btn--onDark { color: var(--aptos-cream); border-color: rgba(232,216,184,0.35); }
.btn--onDark:hover { background: rgba(232,216,184,0.08); }
.btn--ghost {
  background: transparent;
  color: var(--color-accent);
  padding-inline: 0;
  border-radius: 0;
}
.btn--ghost:hover { color: var(--color-accent-hover); text-decoration: none; }

.btn .arrow {
  transition: transform var(--transition-interactive);
  display: inline-block;
}
.btn:hover .arrow { transform: translateX(3px); }

/* Pills / chips */
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4rem 0.85rem;
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  color: var(--color-accent-hover);
  border: 1px solid color-mix(in srgb, var(--color-accent) 22%, transparent);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.pill--onDark {
  color: var(--aptos-champagne);
  background: rgba(232,216,184,0.08);
  border-color: rgba(232,216,184,0.20);
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 3vw, var(--space-8));
  position: relative;
  transition: border-color var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.card--linked:hover {
  border-color: color-mix(in srgb, var(--color-accent) 50%, var(--color-border));
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Dark surface block */
.surface-night {
  background: var(--aptos-obsidian);
  color: var(--aptos-cream);
}
.surface-night h1, .surface-night h2, .surface-night h3, .surface-night h4 { color: var(--aptos-cream); }
.surface-night .lead, .surface-night p { color: rgba(232,216,184,0.8); }

.surface-deep {
  background:
    radial-gradient(1200px 600px at 20% -10%, rgba(180,106,60,0.20), transparent 60%),
    radial-gradient(900px 600px at 90% 100%, rgba(232,216,184,0.10), transparent 60%),
    var(--aptos-deep-teal);
  color: var(--aptos-cream);
}
.surface-deep h1, .surface-deep h2, .surface-deep h3, .surface-deep h4 { color: var(--aptos-cream); }
.surface-deep p, .surface-deep .lead { color: rgba(248,244,234,0.85); }

/* Eye-catching rule */
.rule {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  border: 0;
  margin-block: var(--space-8);
}
.rule--copper {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

/* Grid utilities */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr)); }

/* Stat */
.stat .stat-num {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 1.5rem + 2vw, 3.5rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-accent);
  line-height: 1;
}
.stat .stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* Mark */
mark.acc {
  background: linear-gradient(180deg, transparent 60%, color-mix(in srgb, var(--color-accent) 35%, transparent) 60%);
  color: inherit;
  padding: 0 0.1em;
}

/* SVG diagram styles */
.diagram { width: 100%; height: auto; display: block; }

/* Subtle background patterns */
.dot-bg {
  background-image: radial-gradient(rgba(20,20,20,0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: 0 0;
}
.surface-night .dot-bg, .surface-deep .dot-bg {
  background-image: radial-gradient(rgba(232,216,184,0.10) 1px, transparent 1px);
}