/* ============================================================
   components.css
   Reusable site components.
   Spec source: DESIGN.md §5 + SITE.md "Global Components".
   ============================================================ */

/* ============================================================
   Container & section
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--gutter-mobile);
  padding-right: var(--gutter-mobile);
}
@media (min-width: 640px) {
  .container {
    padding-left: var(--gutter-tablet);
    padding-right: var(--gutter-tablet);
  }
}
@media (min-width: 1024px) {
  .container {
    padding-left: var(--gutter-desktop);
    padding-right: var(--gutter-desktop);
  }
}

.section {
  background: var(--surface-0);
  padding-top: var(--space-10);
  padding-bottom: var(--space-10);
}
.section--alt { background: var(--surface-1); }
@media (min-width: 1024px) {
  .section {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }
}

.section__head {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  max-width: 720px;
}

/* ============================================================
   Eyebrow label
   ============================================================ */

.eyebrow {
  display: inline-block;
  font-family: var(--font-body-family);
  font-size: var(--font-eyebrow);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-tertiary);
  line-height: 1;
}
.eyebrow--accent  { color: var(--accent); }
.eyebrow--amber   { color: var(--signal-power); }

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body-family);
  font-size: var(--font-body);
  font-weight: 500;
  line-height: 1;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.btn--primary {
  background: var(--accent);
  color: #FFFFFF;
}
.btn--primary:hover  { background: var(--accent-bright); }
.btn--primary:active { background: var(--accent-dim); }

.btn--secondary {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text-primary);
}
.btn--secondary:hover {
  background: var(--surface-2);
  border-color: var(--text-tertiary);
}

.btn--tertiary,
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--text-primary);
  font-family: var(--font-body-family);
  font-size: var(--font-body);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
}
.btn--tertiary:hover,
.link-arrow:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}
.link-arrow .arrow {
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease-out);
}
.link-arrow:hover .arrow { transform: translateX(3px); }

/* ============================================================
   Form fields
   ============================================================ */

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.field__label {
  font-family: var(--font-body-family);
  font-size: var(--font-body-sm);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}
.field__label .field__required {
  color: var(--signal-warning);
  margin-left: 2px;
}
.field__input,
.field__select,
.field__textarea {
  background: var(--surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  font-family: var(--font-body-family);
  font-size: var(--font-body);
  width: 100%;
  transition: border-color var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
}
.field__input::placeholder,
.field__textarea::placeholder {
  color: var(--text-quaternary);
}
.field__input:hover,
.field__select:hover,
.field__textarea:hover {
  border-color: var(--border-strong);
}
.field__input:focus,
.field__select:focus,
.field__textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.field__textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.5;
}
.field__select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-tertiary) 50%),
                    linear-gradient(135deg, var(--text-tertiary) 50%, transparent 50%);
  background-position: calc(100% - 20px) center, calc(100% - 14px) center;
  background-size: 6px 6px;
  background-repeat: no-repeat;
  padding-right: 40px;
}
.field__help {
  font-size: var(--font-body-sm);
  color: var(--text-tertiary);
}

/* ============================================================
   Cards
   ============================================================ */

.card {
  background: var(--surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}
.card--primary { padding: var(--space-8); }

/* ============================================================
   Metric card (signature component)
   DESIGN.md §5: left 3px accent edge, eyebrow + numeral + caption
   ============================================================ */

.metric-card {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.metric-card--amber { border-left-color: var(--signal-power); }

.metric-card__eyebrow {
  font-family: var(--font-body-family);
  font-size: var(--font-eyebrow);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-tertiary);
  line-height: 1;
}
.metric-card__value {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(48px, 6vw, 72px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}
.metric-card__unit {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-secondary);
}
.metric-card__caption {
  font-family: var(--font-body-family);
  font-size: var(--font-body-sm);
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Inline metric (Section 1.2 — no card chrome, divider verticals) */
.metric-bar {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--border-default);
  border-bottom: 1px solid var(--border-default);
}
@media (min-width: 640px) {
  .metric-bar { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .metric-bar { grid-template-columns: repeat(4, 1fr); }
}
.metric-bar__cell {
  padding: var(--space-8) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  border-top: 1px solid var(--border-subtle);
}
@media (min-width: 640px) {
  .metric-bar__cell { border-top: 0; border-left: 1px solid var(--border-default); }
  .metric-bar__cell:first-child,
  .metric-bar__cell:nth-child(2n + 1) { border-left: 0; }
}
@media (min-width: 1024px) {
  .metric-bar__cell { border-left: 1px solid var(--border-default); }
  .metric-bar__cell:nth-child(2n + 1) { border-left: 1px solid var(--border-default); }
  .metric-bar__cell:first-child { border-left: 0; }
}
.metric-bar__value {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 56px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}
.metric-bar__unit {
  font-size: 24px;
  color: var(--text-secondary);
}
.metric-bar__label {
  font-size: var(--font-body-sm);
  color: var(--text-tertiary);
}

/* ============================================================
   Site Nav
   ============================================================ */

.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--surface-0);
  border-bottom: 1px solid var(--border-subtle);
  z-index: var(--z-nav);
}
.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-6);
}
.site-nav__brand {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-3);
  color: var(--text-primary);
  flex-shrink: 0;
}
.site-nav__wordmark {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}
.site-nav__brand-eyebrow {
  font-family: var(--font-body-family);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-tertiary);
  display: none;
}
@media (min-width: 640px) {
  .site-nav__brand-eyebrow { display: inline; }
}
.site-nav__links { display: none; }
@media (min-width: 1200px) {
  .site-nav__links { display: block; }
}
.site-nav__links ul {
  display: flex;
  gap: var(--space-6);
}
.site-nav__links a {
  font-family: var(--font-body-family);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}
.site-nav__links a:hover { color: var(--text-primary); }
.site-nav__links a[aria-current="page"] { color: var(--accent); }

.site-nav__cta { display: none; }
@media (min-width: 1200px) {
  .site-nav__cta { display: inline-flex; align-items: center; }
}
.site-nav__cta .link-arrow { font-size: 14px; }

.site-nav__menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  width: 40px;
  height: 40px;
  color: var(--text-primary);
  transition: border-color var(--duration-fast) var(--ease-out);
}
.site-nav__menu-toggle:hover { border-color: var(--text-tertiary); }
@media (min-width: 1200px) {
  .site-nav__menu-toggle { display: none; }
}

/* Mobile drawer — full-height, not a hamburger overlay */
.site-nav__drawer {
  position: fixed;
  top: var(--nav-height); left: 0; right: 0; bottom: 0;
  background: var(--surface-0);
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-8) var(--gutter-mobile);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  z-index: var(--z-drawer);
  overflow-y: auto;
}
.site-nav__drawer[hidden] { display: none; }
.site-nav__drawer ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.site-nav__drawer a {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.site-nav__drawer a[aria-current="page"] { color: var(--accent); }
.site-nav__drawer .site-nav__drawer-cta {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-subtle);
}

/* Page offset so fixed-nav doesn't cover content */
.has-fixed-nav { padding-top: var(--nav-height); }

/* ============================================================
   Site Footer
   ============================================================ */

.site-footer {
  background: var(--surface-1);
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-12);
  padding-bottom: var(--space-8);
  margin-top: 0;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}
@media (min-width: 640px) {
  .site-footer__grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-8); }
}
@media (min-width: 1024px) {
  .site-footer__grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--space-12); }
}
.site-footer__col { display: flex; flex-direction: column; gap: var(--space-4); }
.site-footer__col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.site-footer__col a {
  font-size: var(--font-body);
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}
.site-footer__col a:hover { color: var(--text-primary); }
.site-footer__wordmark {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}
.site-footer__tagline {
  color: var(--text-secondary);
  max-width: 320px;
  font-size: var(--font-body);
}
.site-footer__address {
  margin-top: var(--space-2);
  font-style: normal;
  color: var(--text-tertiary);
  font-size: var(--font-body-sm);
  line-height: 1.6;
}
.site-footer__legal {
  margin-top: var(--space-10);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ============================================================
   Data table
   ============================================================ */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-body-sm);
}
.data-table thead th {
  background: var(--surface-1);
  text-align: left;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-tertiary);
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-default);
}
.data-table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}
.data-table tbody tr:hover td { background: var(--surface-1); }
.data-table td.num,
.data-table th.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

/* ============================================================
   Scroll-reveal utility
   ============================================================ */

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 400ms var(--ease-out), transform 400ms var(--ease-out);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* Hero entrance — staggered children */
[data-hero] > * {
  opacity: 0;
  transform: translateY(8px);
  animation: hero-in var(--duration-slow) var(--ease-out) forwards;
}
[data-hero] > *:nth-child(1) { animation-delay:   0ms; }
[data-hero] > *:nth-child(2) { animation-delay:  80ms; }
[data-hero] > *:nth-child(3) { animation-delay: 160ms; }
[data-hero] > *:nth-child(4) { animation-delay: 240ms; }
[data-hero] > *:nth-child(5) { animation-delay: 320ms; }

@keyframes hero-in {
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  [data-hero] > * { animation-duration: 200ms; animation-delay: 0ms !important; }
}

/* ============================================================
   Layout helpers
   ============================================================ */

.grid-12 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
@media (min-width: 640px) {
  .grid-12 { grid-template-columns: repeat(8, 1fr); gap: var(--space-4); }
}
@media (min-width: 1024px) {
  .grid-12 { grid-template-columns: repeat(12, 1fr); gap: var(--space-5); }
}

.stack-sm { display: flex; flex-direction: column; gap: var(--space-3); }
.stack    { display: flex; flex-direction: column; gap: var(--space-4); }
.stack-lg { display: flex; flex-direction: column; gap: var(--space-6); }
.cluster  { display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: center; }