/* ============================================================
   Humans+ Base styles: reset, typography, layout, utilities
   ============================================================ */

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

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

@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;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--surface-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--text-primary);
}

p { margin: 0 0 1em; }

a { color: var(--brand-primary); text-decoration: none; }
a:hover { color: var(--brand-strong); text-decoration: underline; }

ul, ol { margin: 0 0 1em 1.25em; padding: 0; }
li { margin-bottom: 0.35em; }

hr { border: 0; border-top: 1px solid var(--line-subtle); margin: var(--space-6) 0; }

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

::selection { background: var(--brand-soft); color: var(--text-primary); }

/* ---------- Typography scale ---------- */
.display {
  font-size: clamp(2.5rem, 6vw, 5.75rem);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.025em;
  max-width: 22ch;
}
.display-serif {
  font-family: var(--font-serif);
  font-weight: 500;
  letter-spacing: -0.02em;
}
.h1 { font-size: clamp(2rem, 4.5vw, 3.4rem); }
.h2 { font-size: clamp(1.6rem, 3.4vw, 2.5rem); }
.h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
.h4 { font-size: 1.1rem; }
.lead { font-size: clamp(1.1rem, 2vw, 1.3rem); color: var(--text-secondary); line-height: 1.5; }
.body-lg { font-size: 1.125rem; line-height: 1.65; }
.small { font-size: 0.875rem; }
.eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand-primary);
  margin-bottom: var(--space-3);
}
.muted { color: var(--text-secondary); }
.measure { max-width: var(--measure); }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}
@media (min-width: 768px) { .container { padding: 0 var(--space-7); } }

.section { padding: var(--space-8) 0; }
.section-tight { padding: var(--space-6) 0; }
@media (min-width: 768px) { .section { padding: var(--space-9) 0; } }

.grid { display: grid; gap: var(--space-5); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.stack > * + * { margin-top: var(--space-5); }
.stack-sm > * + * { margin-top: var(--space-3); }

.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
  align-items: center;
}
@media (min-width: 900px) {
  .split { grid-template-columns: 1fr 1fr; }
}

/* ---------- Buttons / CTAs ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  min-height: 44px;
}
.btn:active { transform: translateY(1px); }

.btn-primary { background: var(--brand-primary); color: #FFFFFF; }
[data-theme="dark"] .btn-primary { color: #06120F; }
.btn-primary:hover { background: var(--brand-strong); color: #FFFFFF; text-decoration: none; }
[data-theme="dark"] .btn-primary:hover { color: #06120F; }

.btn-secondary {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--text-primary);
}
.btn-secondary:hover { border-color: var(--brand-primary); color: var(--brand-primary); text-decoration: none; }

.btn-tertiary {
  background: var(--surface-raised);
  border-color: var(--line-subtle);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}
.btn-tertiary:hover { border-color: var(--line-strong); text-decoration: none; }

.btn-text {
  background: none;
  border: none;
  padding: 0.4rem 0;
  color: var(--brand-primary);
  font-weight: 600;
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.btn-text:hover { color: var(--brand-strong); text-decoration: underline; }

.btn-ghost-light {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.35);
  color: #FFFFFF;
}
.btn-ghost-light:hover { background: rgba(255,255,255,0.2); color: #FFFFFF; text-decoration: none; }

.btn-lg { padding: 1rem 1.8rem; font-size: 1.05rem; }

/* ---------- Cards ---------- */
.card {
  background: var(--surface-raised);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--dur-med) var(--ease), transform var(--dur-med) var(--ease), border-color var(--dur-med) var(--ease);
}
.card:hover { box-shadow: var(--shadow-md); }
.card-link { text-decoration: none; color: inherit; display: block; }
.card-link:hover { text-decoration: none; color: inherit; border-color: var(--brand-primary); }
.card-icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: var(--radius-md);
  background: var(--brand-soft);
  color: var(--brand-primary);
  margin-bottom: var(--space-4);
}

/* ---------- Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-subtle);
  background: var(--surface-raised);
  color: var(--text-secondary);
}
.badge-brand { color: var(--brand-primary); border-color: var(--brand-primary); background: var(--brand-soft); }
.badge-violet { color: var(--accent-violet); border-color: var(--accent-violet); background: var(--accent-violet-soft); }
.badge-warm { color: var(--accent-warm); border-color: var(--accent-warm); background: var(--accent-warm-soft); }

/* ---------- Chips (evidence/provenance) ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  background: var(--surface-sunken);
  border: 1px solid var(--line-subtle);
  color: var(--text-secondary);
}
.chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--status-positive); }
.chip.status-caution .dot { background: var(--status-caution); }
.chip.status-critical .dot { background: var(--status-critical); }

/* ---------- Callouts ---------- */
.callout {
  border-left: 4px solid var(--brand-primary);
  background: var(--surface-raised);
  border: 1px solid var(--line-subtle);
  border-left-width: 4px;
  border-left-color: var(--brand-primary);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}
.callout-caution { border-left-color: var(--status-caution); background: var(--status-caution-soft); }
.callout-critical { border-left-color: var(--status-critical); background: var(--status-critical-soft); }
.callout-violet { border-left-color: var(--accent-violet); background: var(--accent-violet-soft); }

/* ---------- Accordion ---------- */
.accordion { border: 1px solid var(--line-subtle); border-radius: var(--radius-md); background: var(--surface-raised); }
.accordion + .accordion { margin-top: var(--space-3); }
.accordion summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-4) var(--space-5);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 48px;
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary .acc-icon { transition: transform var(--dur-fast) var(--ease); flex-shrink: 0; }
.accordion[open] summary .acc-icon { transform: rotate(45deg); }
.accordion .acc-body { padding: 0 var(--space-5) var(--space-5); color: var(--text-secondary); }
.accordion .acc-body > *:last-child { margin-bottom: 0; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line-subtle); border-radius: var(--radius-md); }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; background: var(--surface-raised); }
th, td { text-align: left; padding: var(--space-4); border-bottom: 1px solid var(--line-subtle); vertical-align: top; }
th { font-weight: 600; background: var(--surface-sunken); }
tr:last-child td { border-bottom: 0; }

/* ---------- Forms ---------- */
.field { margin-bottom: var(--space-4); }
.field label { display: block; font-weight: 600; margin-bottom: var(--space-2); }
.field .hint { font-size: 0.82rem; color: var(--text-secondary); margin-top: var(--space-1); }
.field input, .field select, .field textarea {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--surface-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  min-height: 48px;
}
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 3px solid var(--focus-ring);
  outline-offset: 1px;
  border-color: var(--brand-primary);
}
.field .error-msg { color: var(--status-critical); font-size: 0.85rem; margin-top: var(--space-1); display: none; }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: var(--status-critical); }
.field.invalid .error-msg { display: block; }
.checkbox { display: flex; gap: var(--space-3); align-items: flex-start; }
.checkbox input { width: 20px; height: 20px; margin-top: 2px; min-height: 0; flex-shrink: 0; }
.checkbox label { font-weight: 400; margin: 0; }

.form-status { display: none; border-radius: var(--radius-md); padding: var(--space-4); margin-top: var(--space-4); }
.form-status.success { display: block; background: var(--status-positive-soft); color: var(--status-positive); border: 1px solid var(--status-positive); }
.form-status.error { display: block; background: var(--status-critical-soft); color: var(--status-critical); border: 1px solid var(--status-critical); }
[role="alert"] { font-weight: 600; }

.hp-field { position: absolute !important; left: -9999px !important; opacity: 0; height: 0; width: 0; overflow: hidden; }

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  z-index: 200;
  background: var(--brand-primary);
  color: #fff;
  padding: 0.7rem 1.1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--dur-fast) var(--ease);
}
.skip-link:focus { top: var(--space-4); color: #fff; text-decoration: none; }

/* ---------- Visually hidden ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
  white-space: nowrap;
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.full-bleed { width: 100%; }
.rounded { border-radius: var(--radius-lg); }
.overflow-hidden { overflow: hidden; }

/* ---------- Hero scene panels ---------- */
.scene-panel {
  position: relative;
  background: var(--surface-sunken);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.scene-panel .scene-content { position: relative; z-index: 2; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line-subtle);
  background: var(--surface-raised);
  padding: var(--space-8) 0 var(--space-6);
  margin-top: var(--space-8);
}
.footer-grid { display: grid; gap: var(--space-6); grid-template-columns: 1fr; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr 1fr; } }
.footer-col h4 { font-size: 0.85rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-secondary); margin-bottom: var(--space-3); }
.footer-col ul { list-style: none; margin: 0; }
.footer-col li { margin-bottom: var(--space-2); }
.footer-col a { color: var(--text-secondary); font-size: 0.95rem; }
.footer-col a:hover { color: var(--brand-primary); }
.footer-bottom { margin-top: var(--space-7); padding-top: var(--space-5); border-top: 1px solid var(--line-subtle); font-size: 0.85rem; color: var(--text-tertiary); }