/* Varmine components layer: navigation + mobile menu, cards, buttons,
   project detail modal, footer, and preloader chrome. References tokens.css. */

/* ---------------------------------------------------------------------------
   Fixed navigation (Req 1.4, 10.1)
--------------------------------------------------------------------------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}

.nav {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: var(--space-3) var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.nav__logo {
  display: inline-flex;
  align-items: center;
}

.nav__logo-img {
  height: 2rem;
  width: auto;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-ink);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav__link {
  position: relative;
  font-size: var(--type-caption);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 1px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease-reveal);
}

.nav__link:hover::after {
  transform: scaleX(1);
}

/* Mobile menu toggle (Req 1.5): hidden on desktop. */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
}

.nav__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-ink);
  transition: transform 0.3s var(--ease-reveal), opacity 0.3s var(--ease-reveal);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------------------------------------------------------------------------
   Mobile navigation: collapsed-by-default toggle menu (Req 1.5, 1.6, 1.7)
--------------------------------------------------------------------------- */

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-5) var(--gutter);
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    /* Collapsed by default; opens within 500ms (Req 1.6/1.7). */
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition:
      max-height 0.4s var(--ease-reveal),
      opacity 0.3s var(--ease-reveal),
      visibility 0.4s var(--ease-reveal);
  }

  .nav__menu.is-open {
    max-height: 80vh;
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    font-size: 1.125rem;
  }
}

/* ---------------------------------------------------------------------------
   Buttons (Req 2.5)
--------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  border-radius: 999px;
  font-size: var(--type-caption);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: background-color 0.3s var(--ease-reveal), color 0.3s var(--ease-reveal);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-inverse-ink);
}

.btn--primary:hover {
  background-color: var(--color-accent-2);
  color: var(--color-inverse-ink);
}

/* ---------------------------------------------------------------------------
   Cards: portfolio, service, team
--------------------------------------------------------------------------- */

.card {
  min-width: 0;
}

.card__link {
  display: block;
}

.card__media {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--color-surface);
  border-radius: 4px;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-reveal);
}

/* Hover state distinct from default (Req 3.4). */
.card--project .card__link:hover .card__media img {
  transform: scale(1.05);
}

.card__title {
  display: block;
  margin-top: var(--space-4);
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.card__meta {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--type-caption);
  color: var(--color-muted);
}

.card--service {
  padding: var(--space-6);
  background-color: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: 6px;
}

.card--service .card__body {
  margin-top: var(--space-3);
  color: var(--color-muted);
}

/* ---------------------------------------------------------------------------
   About + contact
--------------------------------------------------------------------------- */

.about__content p + p {
  margin-top: var(--space-4);
}

.about__content .section__title {
  margin-bottom: var(--space-5);
}

.contact__details {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
}

.contact__line + .contact__line {
  margin-top: var(--space-3);
}

/* ---------------------------------------------------------------------------
   Footer (Req 10.3)
--------------------------------------------------------------------------- */

.site-footer {
  background-color: var(--color-inverse-bg);
  color: var(--color-inverse-ink);
  padding-block: var(--space-8);
}

.site-footer__grid {
  row-gap: var(--space-3);
}

.site-footer__brand {
  font-family: var(--font-display);
  font-size: 2rem;
}

.site-footer__location,
.site-footer__copyright {
  color: color-mix(in srgb, var(--color-inverse-ink) 70%, transparent);
  font-size: var(--type-caption);
}

/* ---------------------------------------------------------------------------
   Project detail modal (Req 3.5–3.8)
--------------------------------------------------------------------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gutter);
}

.modal[hidden] {
  display: none;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(20, 18, 16, 0.6);
}

.modal__panel {
  position: relative;
  z-index: 1;
  width: min(100%, 60rem);
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-7);
  background-color: var(--color-bg);
  border-radius: 8px;
}

.modal__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--color-ink);
}

.modal__title {
  margin-bottom: var(--space-5);
}

.modal__media img {
  width: 100%;
  border-radius: 4px;
}

.modal__description {
  margin-top: var(--space-5);
  max-width: 65ch;
  color: var(--color-muted);
}

/* ---------------------------------------------------------------------------
   Preloader chrome (Req 11)
--------------------------------------------------------------------------- */

.preloader {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg);
}

.preloader.is-hidden {
  display: none;
}

.preloader__brand {
  font-family: var(--font-display);
  font-size: var(--type-section);
  letter-spacing: var(--tracking-display);
  color: var(--color-ink);
}

/* Scroll progress fill colour (geometry lives in motion.css). */
.progress {
  height: 3px;
  background-color: transparent;
}

.progress-fill {
  height: 100%;
  width: 100%;
  background-color: var(--color-accent);
}

/* ---------------------------------------------------------------------------
   Hero background image
--------------------------------------------------------------------------- */

.hero__bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: -1;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

/* Paper wash overlay (light) — see styles/sketch.css for the gradient */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
}

/* Hero text sits above the overlay */
.hero__grid {
  position: relative;
  z-index: 2;
}

/* Dark ink text over the light sketch */
.hero .hero__name { color: var(--color-ink); }
.hero .hero__tagline { color: var(--color-muted); }