/* ============================================================
   Components — layout primitives, buttons, links, header, footer,
   drawer, logo. Built once, used everywhere.
   ============================================================ */

/* ---- Layout primitives ---- */

.container {
  inline-size: 100%;
  max-inline-size: var(--container-max);
  padding-inline: var(--section-px);
  margin-inline: auto;
}
.container--wide { max-inline-size: var(--container-wide-max); }

.section {
  position: relative;
  padding-block: var(--section-py);
}

/* ---- Eyebrow ---- */
.eyebrow {
  font-family: var(--ff-sans);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--c-text-meta);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}
.eyebrow::before {
  content: '';
  inline-size: 24px;
  block-size: 1px;
  background: currentColor;
  flex: 0 0 24px;
}

/* ---- Masked text reveals (Phase C/D wires the motion) ---- */
.mask {
  display: block;
  overflow: hidden;
  padding-block: 0.04em;
}
.mask__inner { display: block; will-change: transform; }

/* ---- Buttons ---- */
.btn {
  --btn-py: 14px;
  --btn-px: 28px;
  --btn-mag-x: 0px;
  --btn-mag-y: 0px;
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--btn-py) var(--btn-px);
  font-family: var(--ff-sans);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  line-height: 1;
  position: relative;
  isolation: isolate;
  cursor: pointer;
  border-radius: var(--r-xs);
  transition: color var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.btn__inner {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  transform: translate3d(var(--btn-mag-x), var(--btn-mag-y), 0);
  transition: transform var(--dur-fast) var(--ease-out);
}

.btn--primary { background: var(--c-navy); color: var(--c-bone); }
.btn--primary:hover { background: var(--c-coral); }

.btn--accent { background: var(--c-orange); color: var(--c-navy); }
.btn--accent:hover { background: var(--c-coral); color: var(--c-bone); }

.btn--ghost {
  background: transparent;
  color: var(--c-text-strong);
  border: 1px solid var(--c-border-strong);
}
.btn--ghost:hover { border-color: var(--c-navy); background: var(--c-navy); color: var(--c-bone); }

.btn--ghost-light {
  background: transparent;
  color: var(--c-text-on-dark);
  border: 1px solid var(--c-border-on-dark);
}
.btn--ghost-light:hover { background: var(--c-bone); color: var(--c-navy); border-color: var(--c-bone); }

.btn--sm { --btn-py: 10px; --btn-px: 18px; font-size: var(--fs-xs); }
.btn--lg { --btn-py: 18px; --btn-px: 32px; font-size: var(--fs-sm); }

.btn__arrow {
  display: inline-block;
  transition: transform var(--dur-fast) var(--ease-out);
}
.btn:hover .btn__arrow { transform: translateX(4px); }
.btn:active { transform: translateY(1px); }

/* ---- SVG defs + logo ---- */
.logo {
  display: block;
  inline-size: auto;
  block-size: 28px;
  color: currentColor;
}
.logo--wordmark { block-size: 52px; }

/* ============================================================
   Site header — fixed, scroll-aware, surface-aware
   ============================================================ */

.site-header {
  --header-text:        var(--c-text-on-dark);
  --header-text-strong: var(--c-bone);
  --header-text-meta:   var(--c-text-on-dark-meta);
  --header-bg:          transparent;
  --header-shadow:      none;

  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-header);
  background: var(--header-bg);
  box-shadow: var(--header-shadow);
  block-size: var(--header-h);
  display: flex;
  align-items: center;
  transition: transform var(--dur-base) var(--ease-out),
              block-size var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out);
}
.site-header--scrolled {
  --header-text:        var(--c-text);
  --header-text-strong: var(--c-text-strong);
  --header-text-meta:   var(--c-text-meta);
  --header-bg:          var(--c-bone);
  --header-shadow:      var(--shadow-sm);
  block-size: var(--header-h-scrolled);
}

/* Page starts on a light surface (no dark hero) — header is solid + dark text at rest */
.site-header--on-light {
  --header-text:        var(--c-text);
  --header-text-strong: var(--c-text-strong);
  --header-text-meta:   var(--c-text-meta);
  --header-bg:          var(--c-bone);
  --header-shadow:      none;
}
.site-header--on-light.site-header--scrolled {
  --header-shadow:      var(--shadow-sm);
}
.site-header--hidden { transform: translateY(-100%); }

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  inline-size: 100%;
}

.site-header__brand {
  display: flex;
  align-items: center;
  color: var(--header-text-strong);
  transition: opacity var(--dur-fast) var(--ease-out);
}
.site-header__brand:hover { opacity: 0.78; }

/* ---- Primary nav ---- */
.site-nav { flex: 1; display: flex; justify-content: center; }
.site-nav__list { display: flex; gap: clamp(var(--sp-4), 3vw, var(--sp-6)); align-items: center; }
.site-nav__link {
  font-family: var(--ff-sans);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--header-text);
  letter-spacing: var(--tracking-snug);
  padding-block: var(--sp-2);
  position: relative;
  transition: color var(--dur-fast) var(--ease-out);
}
.site-nav__link::after {
  content: '';
  position: absolute;
  inset-inline: 0;
  inset-block-end: -2px;
  block-size: 1px;
  background: var(--c-orange);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--dur-base) var(--ease-out);
}
.site-nav__link:hover { color: var(--header-text-strong); }
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--header-text-strong); font-weight: 600; }

/* ============================================================
   Header nav dropdowns (D-5) — Services + Projects
   Additive; does not alter existing .site-nav or .site-nav__link rules.
   ============================================================ */
.site-header__nav-item--has-dropdown {
  position: relative;
}
.site-header__nav-arrow {
  display: inline-block;
  margin-inline-start: 6px;
  font-size: 0.75em;
  line-height: 1;
  transition: transform var(--dur-fast) var(--ease-out);
}
.site-header__nav-item--has-dropdown.is-open .site-header__nav-arrow {
  transform: rotate(180deg);
}

.site-header__dropdown {
  position: absolute;
  inset-block-start: 100%;
  inset-inline-start: 0;
  min-inline-size: 240px;
  padding: var(--sp-3) 0;
  margin-block-start: var(--sp-2);
  background: var(--c-bone);
  border: 1px solid var(--c-line);
  box-shadow: 0 12px 32px rgba(18, 63, 109, 0.10);
  border-radius: var(--r-xs);
  z-index: calc(var(--z-header) + 1);
  list-style: none;

  /* hidden by default */
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out),
              visibility 0s var(--dur-fast);
}
.site-header__nav-item--has-dropdown.is-open .site-header__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out),
              visibility 0s 0s;
}

.site-header__dropdown-link {
  display: block;
  padding: var(--sp-2) var(--sp-4);
  font-family: var(--ff-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: var(--tracking-snug);
  color: var(--c-text);
  text-decoration: none;
  position: relative;
  transition: color var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out);
}
.site-header__dropdown-link:hover,
.site-header__dropdown-link:focus-visible {
  color: var(--c-navy);
  background: var(--c-line);
  outline: none;
}
.site-header__dropdown-link[aria-current="page"] {
  color: var(--c-navy);
  font-weight: 600;
}
.site-header__dropdown-link[aria-current="page"]::before {
  content: '';
  position: absolute;
  inset-inline-start: 8px;
  inset-block: 50% auto;
  transform: translateY(-50%);
  inline-size: 6px;
  block-size: 6px;
  background: var(--c-orange);
  border-radius: 50%;
}

/* On the home page hero (dark surface), the parent trigger text inherits
   from .site-nav__link's existing dark-mode treatment. The dropdown itself
   always renders on bone — it's a contained menu surface, not header chrome. */

/* ============================================================
   Mobile drawer sub-nav (D-5) — always-expanded indented items.
   Use compound selectors so this overrides `.mobile-drawer__nav a`
   which is defined later in the file with equal specificity.
   ============================================================ */
.mobile-drawer__nav .mobile-drawer__sub-nav {
  list-style: none;
  padding-inline-start: var(--sp-3);
  margin-block-start: var(--sp-1);
  margin-block-end: var(--sp-2);
  border-inline-start: 1px solid var(--c-border);
}
.mobile-drawer__nav .mobile-drawer__sub-nav li {
  padding-block: 0;
  border-block-end: none;
}
.mobile-drawer__nav .mobile-drawer__sub-nav a {
  font-family: var(--ff-sans);
  font-variation-settings: normal;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: var(--tracking-snug);
  color: var(--c-text);
  padding-block: var(--sp-2);
  padding-inline-start: var(--sp-3);
  display: block;
}
.mobile-drawer__nav .mobile-drawer__sub-nav a:hover {
  color: var(--c-navy);
  transform: none;
}
.mobile-drawer__nav .mobile-drawer__sub-nav a[aria-current="page"] {
  color: var(--c-coral);
}
.mobile-drawer__nav .mobile-drawer__sub-nav a[aria-current="page"]::before {
  content: none;
}

/* ---- Header actions ---- */
.site-header__actions { display: flex; align-items: center; gap: var(--sp-4); }

/* ---- Language switcher ---- */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--ff-sans);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}
.site-header .lang-switcher__current { color: var(--header-text-strong); }
.site-header .lang-switcher__sep,
.site-header .lang-switcher__alt { color: var(--header-text-meta); }
.site-header .lang-switcher__alt:hover { color: var(--header-text-strong); }

.lang-switcher--footer .lang-switcher__current,
.lang-switcher--footer .lang-switcher__alt { color: var(--c-text-on-dark); }
.lang-switcher--footer .lang-switcher__sep,
.lang-switcher--footer .lang-switcher__alt:not(:hover) { color: var(--c-text-on-dark-meta); }

/* ---- Burger ---- */
.site-header__burger {
  display: none;
  inline-size: 44px; block-size: 44px;
  align-items: center; justify-content: center;
  color: var(--header-text-strong);
  transition: color var(--dur-fast) var(--ease-out);
}
.site-header__burger svg { inline-size: 24px; block-size: 24px; }
.site-header__burger:hover { color: var(--c-coral); }

@media (max-width: 960px) {
  .site-nav,
  .site-header__cta,
  .site-header__actions .lang-switcher { display: none; }
  .site-header__burger { display: inline-flex; }
}

/* ============================================================
   Mobile drawer
   ============================================================ */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  visibility: hidden;
  pointer-events: none;
}
.mobile-drawer[aria-hidden="false"] { visibility: visible; pointer-events: auto; }

.mobile-drawer__backdrop {
  position: absolute; inset: 0;
  background: rgba(13, 46, 81, 0);
  transition: background-color var(--dur-base) var(--ease-out);
}
.mobile-drawer[aria-hidden="false"] .mobile-drawer__backdrop { background: rgba(13, 46, 81, 0.6); }

.mobile-drawer__panel {
  position: absolute;
  inset-block: 0;
  inset-inline-end: 0;
  inline-size: min(420px, 100%);
  background: var(--c-bone);
  display: flex;
  flex-direction: column;
  padding: var(--sp-5) clamp(20px, 5vw, var(--sp-5));
  transform: translateX(100%);
  transition: transform var(--dur-base) var(--ease-out);
  overflow-y: auto;
}
.mobile-drawer[aria-hidden="false"] .mobile-drawer__panel { transform: translateX(0); }

.mobile-drawer__head {
  display: flex; align-items: center; justify-content: space-between;
  margin-block-end: var(--sp-6);
}
.mobile-drawer__logo { block-size: 28px; inline-size: auto; color: var(--c-navy); }
.mobile-drawer__close {
  inline-size: 44px; block-size: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--c-navy);
  transition: color var(--dur-fast) var(--ease-out);
}
.mobile-drawer__close svg { inline-size: 20px; block-size: 20px; }
.mobile-drawer__close:hover { color: var(--c-coral); }

.mobile-drawer__nav {
  display: flex; flex-direction: column; gap: var(--sp-1);
  flex: 1;
}
.mobile-drawer__nav li { padding-block: var(--sp-2); border-block-end: 1px solid var(--c-border); }
.mobile-drawer__nav a {
  font-family: var(--ff-display);
  font-variation-settings: var(--fvar-heading);
  font-weight: 600;
  font-size: clamp(1.75rem, 6vw, 2.5rem);
  letter-spacing: var(--tracking-tight);
  color: var(--c-text-strong);
  display: block;
  padding-block: var(--sp-2);
  transition: color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.mobile-drawer__nav a:hover { color: var(--c-coral); transform: translateX(4px); }
.mobile-drawer__nav a[aria-current="page"] {
  color: var(--c-coral);
  position: relative;
  padding-inline-start: var(--sp-3);
}
.mobile-drawer__nav a[aria-current="page"]::before {
  content: '';
  position: absolute;
  inset-inline-start: 0; inset-block: 25% 30%;
  inline-size: 3px;
  background: var(--c-orange);
}

.mobile-drawer__foot {
  display: flex; flex-direction: column; gap: var(--sp-4);
  margin-block-start: var(--sp-5);
  padding-block-start: var(--sp-5);
  border-block-start: 1px solid var(--c-border);
}
.mobile-drawer__foot .lang-switcher { align-self: flex-start; font-size: var(--fs-sm); }
.mobile-drawer__foot .lang-switcher__current { color: var(--c-text-strong); }
.mobile-drawer__foot .lang-switcher__sep,
.mobile-drawer__foot .lang-switcher__alt { color: var(--c-text-meta); }
.mobile-drawer__foot .lang-switcher__alt:hover { color: var(--c-text-strong); }
.mobile-drawer__foot .btn { align-self: flex-start; }

/* ============================================================
   Site footer
   ============================================================ */
.site-footer {
  position: relative;
  background: var(--c-bg-darker);
  color: var(--c-text-on-dark);
  padding-block: var(--sp-7) var(--sp-5);
  overflow: hidden;
}
.site-footer__top {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) 2fr;
  gap: var(--sp-6);
  padding-block-end: var(--sp-6);
}
.site-footer__brand .logo { color: var(--c-bone); margin-block-end: var(--sp-3); }
.site-footer__tagline {
  font-family: var(--ff-display);
  font-variation-settings: var(--fvar-body-serif);
  font-style: italic;
  font-size: var(--fs-lg);
  color: var(--c-text-on-dark-meta);
  max-inline-size: 38ch;
  line-height: var(--lh-snug);
}
.site-footer__columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}
.site-footer__heading {
  font-family: var(--ff-sans);
  font-weight: 600;
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--c-text-on-dark);
  margin-block-end: var(--sp-3);
}
.site-footer__col ul { display: flex; flex-direction: column; gap: var(--sp-2); }
.site-footer__col li {
  font-size: var(--fs-sm);
  color: var(--c-text-on-dark-meta);
  line-height: var(--lh-snug);
}
.site-footer__col a {
  color: var(--c-text-on-dark-meta);
  transition: color var(--dur-fast) var(--ease-out);
}
.site-footer__col a:hover { color: var(--c-bone); }

.site-footer__bottom {
  display: flex; flex-wrap: wrap; gap: var(--sp-4);
  justify-content: space-between; align-items: center;
  padding-block-start: var(--sp-5);
  border-block-start: 1px solid rgba(255, 255, 255, 0.12);
}
.site-footer__legal {
  font-size: var(--fs-xs);
  color: var(--c-text-on-dark-meta);
  letter-spacing: var(--tracking-snug);
}

@media (max-width: 900px) {
  .site-footer__top { grid-template-columns: 1fr; gap: var(--sp-5); }
}
@media (max-width: 560px) {
  .site-footer__columns { grid-template-columns: 1fr 1fr; gap: var(--sp-5) var(--sp-4); }
}
@media (max-width: 380px) {
  .site-footer__columns { grid-template-columns: 1fr; }
}

/* Push the page content below the fixed header (the hero negates this) */
main { padding-block-start: var(--header-h); }

/* ============================================================
   Placeholder page stub — used by /about, /services, /projects,
   /contact during Phase B and as a fallback for /
   ============================================================ */
.page-stub {
  min-block-size: calc(100dvh - var(--header-h));
  display: grid;
  place-content: center;
  text-align: center;
  padding-block: var(--sp-7);
  padding-inline: var(--section-px);
}
.page-stub .eyebrow { justify-content: center; }
.page-stub h1 {
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  margin-block: var(--sp-4) var(--sp-3);
  max-inline-size: 18ch;
}
.page-stub__sub {
  font-size: var(--fs-lg);
  color: var(--c-text-meta);
  margin-inline: auto;
  max-inline-size: 42ch;
}