/* ============================================================
   Components — Phase 3 sample (button + card)
   Header / footer / nav / hero etc. land in later phases.
   ============================================================ */

/* ---------- Button ---------- */

.btn {
  --btn-bg: var(--color-obsidian);
  --btn-fg: var(--color-ivory);
  --btn-bd: var(--color-obsidian);
  --btn-bg-hover: var(--color-ember);
  --btn-bd-hover: var(--color-ember);
  --btn-px: 1.5rem;
  --btn-py: 0.875rem;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  padding: var(--btn-py) var(--btn-px);
  min-height: 2.875rem;

  font-family: var(--font-sans);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;

  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-bd);
  border-radius: var(--radius-pill);

  cursor: pointer;
  transition:
    background-color var(--dur-fast) var(--ease-out),
    border-color    var(--dur-fast) var(--ease-out),
    color           var(--dur-fast) var(--ease-out),
    transform       var(--dur-fast) var(--ease-out);
  will-change: transform;
}

.btn:hover {
  background: var(--btn-bg-hover);
  border-color: var(--btn-bd-hover);
  color: var(--btn-fg);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

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

.btn[aria-disabled="true"],
.btn:disabled {
  opacity: 0.45;
  pointer-events: none;
}

/* Variants */

.btn--secondary {
  --btn-bg: transparent;
  --btn-fg: var(--color-text);
  --btn-bd: var(--color-text);
  --btn-bg-hover: var(--color-text);
}
.btn--secondary:hover {
  color: var(--color-ivory);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--color-text);
  --btn-bd: transparent;
  --btn-bg-hover: rgba(19, 19, 15, 0.06);
  --btn-bd-hover: transparent;
}
.btn--ghost:hover {
  color: var(--color-text);
}

.btn--accent {
  --btn-bg: var(--color-dune);
  --btn-fg: var(--color-obsidian);
  --btn-bd: var(--color-dune);
  --btn-bg-hover: var(--color-ember);
  --btn-bd-hover: var(--color-ember);
}
.btn--accent:hover {
  color: var(--color-ivory);
}

/* On-dark variants (use inside .section--dark or set explicitly) */

.section--dark .btn,
.btn--on-dark {
  --btn-bg: var(--color-ivory);
  --btn-fg: var(--color-obsidian);
  --btn-bd: var(--color-ivory);
  --btn-bg-hover: var(--color-dune);
  --btn-bd-hover: var(--color-dune);
}

.section--dark .btn--secondary,
.btn--secondary.btn--on-dark {
  --btn-bg: transparent;
  --btn-fg: var(--color-ivory);
  --btn-bd: var(--color-ivory);
  --btn-bg-hover: var(--color-ivory);
}
.section--dark .btn--secondary:hover,
.btn--secondary.btn--on-dark:hover {
  color: var(--color-obsidian);
}

.section--dark .btn--ghost,
.btn--ghost.btn--on-dark {
  --btn-bg: transparent;
  --btn-fg: var(--color-ivory);
  --btn-bd: transparent;
  --btn-bg-hover: rgba(244, 239, 231, 0.10);
  --btn-bd-hover: transparent;
}

/* Sizes */

.btn--sm {
  --btn-px: 1.125rem;
  --btn-py: 0.625rem;
  font-size: var(--fs-caption);
  min-height: 2.25rem;
}

.btn--lg {
  --btn-px: 2rem;
  --btn-py: 1.125rem;
  font-size: var(--fs-body);
  min-height: 3.375rem;
}

/* Arrow affordance */

.btn .btn__arrow {
  display: inline-block;
  transition: transform var(--dur-fast) var(--ease-out);
}
.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* ---------- Card ---------- */

.card {
  --card-bg: var(--bg-elevated);
  --card-fg: var(--color-text);
  --card-bd: var(--surface-line);
  --card-radius: var(--radius-lg);

  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  color: var(--card-fg);
  border: 1px solid var(--card-bd);
  border-radius: var(--card-radius);
  overflow: hidden;
  transition:
    transform   var(--dur-base) var(--ease-out),
    box-shadow  var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--surface-line-strong);
}

.card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--color-bone);
  overflow: hidden;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}

.card:hover .card__media img {
  transform: scale(1.04);
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-lg);
  flex: 1;
}

.card__eyebrow {
  font-family: var(--font-sans);
  font-size: var(--fs-caption);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tr-eyebrow);
  text-transform: uppercase;
  color: var(--accent);
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  letter-spacing: var(--tr-tight);
  color: inherit;
  font-variation-settings: "SOFT" 50, "opsz" 144;
  text-wrap: balance;
}

.card__desc {
  color: var(--fg-muted);
  font-size: var(--fs-body);
  line-height: var(--lh-relaxed);
  max-width: 60ch;
}

.card__footer {
  margin-top: auto;
  padding-top: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.card__cta {
  font-family: var(--font-sans);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  color: var(--color-obsidian);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  position: relative;
}

.card__cta::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -3px;
  height: 1px;
  background: currentColor;
  transform-origin: right;
  transform: scaleX(0);
  transition: transform var(--dur-base) var(--ease-out);
}

.card:hover .card__cta::after {
  transform-origin: left;
  transform: scaleX(1);
}

/* Card variants */

.card--dark {
  --card-bg: var(--bg-inverse-elevated);
  --card-fg: var(--color-ivory);
  --card-bd: var(--surface-line-on-dark);
}

.card--dark .card__title { color: var(--color-ivory); }
.card--dark .card__desc  { color: var(--fg-on-dark-muted); }
.card--dark .card__cta   { color: var(--color-ivory); }
.card--dark:hover        { border-color: var(--surface-line-on-dark-strong); }

.card--accent {
  --card-bg: var(--color-bone);
  --card-bd: transparent;
}

.card--bordered {
  --card-bg: transparent;
  border-width: 1px;
  border-color: var(--surface-line-strong);
}

.card--bordered:hover {
  border-color: var(--color-text);
}

.card--compact .card__body { padding: var(--space-md); }

/* ============================================================
   Phase 4 — Site header / Mobile drawer / Site footer
   Shared shell wired into all 7 pages.
   ============================================================ */

/* ---------- Site header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: color-mix(in oklab, var(--color-mist) 86%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition:
    background-color var(--dur-fast) var(--ease-out),
    border-color     var(--dur-fast) var(--ease-out),
    box-shadow       var(--dur-fast) var(--ease-out);
}

.site-header[data-scrolled] {
  background: color-mix(in oklab, var(--color-mist) 97%, transparent);
  border-bottom-color: var(--surface-line);
  box-shadow: 0 4px 12px rgba(19, 19, 15, 0.04);
}

.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-md);
  min-height: 4.5rem;
  padding-block: var(--space-sm);
}

@media (min-width: 1024px) {
  .site-header__inner { min-height: 5.25rem; }
}

/* ----- Brand wordmark (used in header + footer) ----- */

.site-header__brand,
.site-footer__brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: var(--fw-bold);
  letter-spacing: var(--tr-tight);
  font-variation-settings: "SOFT" 50, "opsz" 144;
  color: inherit;
}

@media (min-width: 768px) {
  .brand-mark { font-size: 1.75rem; }
}

.brand-tag {
  font-family: var(--font-sans);
  font-size: 0.625rem;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tr-eyebrow);
  text-transform: uppercase;
  color: var(--fg-muted);
}

@media (max-width: 479px) {
  .site-header .brand-tag { display: none; }
}

/* ----- Primary nav (desktop) ----- */

.site-nav { justify-self: center; }

.site-nav__list {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.site-nav__list a {
  position: relative;
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: 0.01em;
  color: var(--fg);
  padding-block: var(--space-2xs);
  transition: color var(--dur-fast) var(--ease-out);
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1.5px;
  background: var(--accent);
  transform-origin: right;
  transform: scaleX(0);
  transition: transform var(--dur-base) var(--ease-out);
}

.site-nav__list a:hover::after,
.site-nav__list a:focus-visible::after {
  transform-origin: left;
  transform: scaleX(1);
}

.site-nav__list a[aria-current="page"] {
  color: var(--accent-hover);
}
.site-nav__list a[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--accent-hover);
}

/* ----- Header CTA ----- */

.site-header__cta { white-space: nowrap; }

/* ----- Mobile menu toggle ----- */

.site-header__menu {
  width: 2.75rem;
  height: 2.75rem;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  border: 1px solid var(--surface-line);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--fg);
  transition: border-color var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out);
}

.site-header__menu:hover {
  border-color: var(--surface-line-strong);
  background: rgba(19, 19, 15, 0.04);
}

.site-header__menu-bar {
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transition:
    transform var(--dur-fast) var(--ease-out),
    opacity   var(--dur-fast) var(--ease-out);
}

.site-header__menu[aria-expanded="true"] .site-header__menu-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.site-header__menu[aria-expanded="true"] .site-header__menu-bar:nth-child(2) {
  opacity: 0;
}
.site-header__menu[aria-expanded="true"] .site-header__menu-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ----- Visibility: mobile vs desktop, with no-JS fallback ----- */

.site-header__inner > .site-nav,
.site-header__inner > .site-header__cta {
  display: none;
}
.site-header__inner > .site-header__menu {
  display: inline-flex;
}

@media (min-width: 1024px) {
  .site-header__inner > .site-nav { display: block; }
  .site-header__inner > .site-header__cta { display: inline-flex; }
  .site-header__inner > .site-header__menu { display: none; }
}

/* No-JS: drawer can't open, so always show inline nav. */
html:not(.js) .site-header__inner > .site-nav { display: block; }
html:not(.js) .site-header__inner > .site-header__cta { display: inline-flex; }
html:not(.js) .site-header__inner > .site-header__menu { display: none; }
html:not(.js) .site-nav__list { gap: var(--space-md); flex-wrap: wrap; }

/* ---------- Mobile drawer ---------- */

.mobile-drawer {
  position: fixed;
  inset: 4.5rem 0 0 0;
  background: var(--color-mist);
  z-index: calc(var(--z-sticky) - 1);
  padding: var(--space-2xl) var(--gutter) var(--space-xl);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-xl);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-0.5rem);
  transition:
    opacity    var(--dur-base) var(--ease-out),
    visibility var(--dur-base) var(--ease-out),
    transform  var(--dur-base) var(--ease-out);
}

.mobile-drawer[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

@media (min-width: 1024px) {
  .mobile-drawer { display: none; }
}

.mobile-drawer__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.mobile-drawer__list a {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 1.4rem + 2.4vw, 2.625rem);
  font-weight: var(--fw-semibold);
  line-height: 1.1;
  letter-spacing: var(--tr-tight);
  color: var(--fg);
  font-variation-settings: "SOFT" 50, "opsz" 144;
  padding-block: var(--space-3xs);
  opacity: 0;
  transform: translateY(8px);
  transition:
    color     var(--dur-fast) var(--ease-out),
    transform var(--dur-base) var(--ease-out),
    opacity   var(--dur-base) var(--ease-out);
}

.mobile-drawer[aria-hidden="false"] .mobile-drawer__list a {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger reveal — reads as one swift cascade */
.mobile-drawer[aria-hidden="false"] .mobile-drawer__list li:nth-child(1) a { transition-delay: 60ms; }
.mobile-drawer[aria-hidden="false"] .mobile-drawer__list li:nth-child(2) a { transition-delay: 110ms; }
.mobile-drawer[aria-hidden="false"] .mobile-drawer__list li:nth-child(3) a { transition-delay: 160ms; }
.mobile-drawer[aria-hidden="false"] .mobile-drawer__list li:nth-child(4) a { transition-delay: 210ms; }
.mobile-drawer[aria-hidden="false"] .mobile-drawer__list li:nth-child(5) a { transition-delay: 260ms; }
.mobile-drawer[aria-hidden="false"] .mobile-drawer__list li:nth-child(6) a { transition-delay: 310ms; }
.mobile-drawer[aria-hidden="false"] .mobile-drawer__list li:nth-child(7) a { transition-delay: 360ms; }

.mobile-drawer__list a:hover {
  color: var(--accent-hover);
  transform: translateX(6px);
}
.mobile-drawer__list a[aria-current="page"] { color: var(--accent-hover); }

.mobile-drawer__cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--surface-line);
}

.mobile-drawer__contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
  font-size: var(--fs-small);
  color: var(--fg-muted);
}

.mobile-drawer__contact a { color: var(--fg); }
.mobile-drawer__contact a:hover { color: var(--accent-hover); }

body.drawer-open { overflow: hidden; }

/* ---------- Site footer ---------- */

.site-footer {
  background: var(--color-obsidian);
  color: var(--fg-on-dark);
  padding-top: var(--section-y);
  margin-top: var(--space-3xl);
}

.site-footer__inner {
  display: grid;
  gap: var(--space-2xl);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .site-footer__inner {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl) var(--space-lg);
  }
}

@media (min-width: 1024px) {
  .site-footer__inner {
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: var(--space-xl) var(--space-2xl);
  }
}

.site-footer__brand .brand-mark {
  color: var(--fg-on-dark);
  font-size: 2rem;
}

.site-footer__tagline {
  color: var(--fg-on-dark-muted);
  font-size: var(--fs-body);
  line-height: var(--lh-relaxed);
  max-width: 36ch;
  margin-block: var(--space-md) var(--space-lg);
}

.site-footer__heading {
  font-family: var(--font-sans);
  font-size: var(--fs-caption);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tr-eyebrow);
  text-transform: uppercase;
  color: var(--color-dune);
  margin-bottom: var(--space-md);
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.site-footer__list a,
.site-footer__link {
  color: var(--fg-on-dark);
  font-size: var(--fs-body);
  display: inline-block;
  padding-block: 2px;
  transition:
    color     var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.site-footer__list a:hover,
.site-footer__link:hover {
  color: var(--color-dune);
  transform: translateX(3px);
}

.site-footer__list a[aria-current="page"] { color: var(--color-dune); }

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.site-footer__address {
  font-style: normal;
  color: var(--fg-on-dark-muted);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-2xs);
}

.site-footer__address strong {
  display: block;
  color: var(--fg-on-dark);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-3xs);
}

.site-footer__group {
  color: var(--fg-on-dark-muted);
  font-size: var(--fs-small);
  line-height: var(--lh-relaxed);
  max-width: 32ch;
}

/* Social icons */
.site-footer__social {
  display: flex;
  gap: var(--space-2xs);
  margin-top: var(--space-md);
}

.site-footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--surface-line-on-dark);
  color: var(--fg-on-dark);
  transition:
    border-color    var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    color           var(--dur-fast) var(--ease-out),
    transform       var(--dur-fast) var(--ease-out);
}

.site-footer__social a:hover {
  border-color: var(--color-dune);
  background: var(--color-dune);
  color: var(--color-obsidian);
  transform: translateY(-2px);
}

.site-footer__social svg {
  width: 18px;
  height: 18px;
}

/* Bottom strip */
.site-footer__bottom {
  margin-top: var(--space-2xl);
  padding-block: var(--space-md);
  border-top: 1px solid var(--surface-line-on-dark);
}

.site-footer__bottom-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  justify-content: space-between;
  align-items: flex-start;
  font-size: var(--fs-small);
  color: var(--fg-on-dark-muted);
}

@media (min-width: 768px) {
  .site-footer__bottom-inner {
    flex-direction: row;
    align-items: center;
  }
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.site-footer__legal a {
  color: var(--fg-on-dark-muted);
  font-size: var(--fs-small);
}
.site-footer__legal a:hover { color: var(--fg-on-dark); }