/* ==========================================================================
   components.css — reusable UI components
   Used across index.html and all case study pages.
   ========================================================================== */

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6) var(--container-pad);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  z-index: 10;
  backdrop-filter: blur(4px);
}

.nav__logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.5px;
  color: var(--color-text-primary);
  transition: opacity var(--transition-base);
}

.nav__logo:hover {
  opacity: 0.8;
}

.nav__logo-accent {
  color: var(--color-accent);
}

.nav__links {
  display: flex;
  gap: var(--space-8);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.3px;
}

.nav__links a {
  color: var(--color-nav-link);
  transition: color var(--transition-base);
}

.nav__links a:hover {
  color: var(--color-nav-link-hover);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__back {
  color: var(--color-accent);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: opacity var(--transition-base);
}

.nav__back:hover {
  opacity: 0.75;
}

/* --- Mobile menu toggle (hamburger) --- */
.nav__toggle {
  display: none; /* shown only on mobile via media query */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  border-radius: var(--radius-full);
}

.nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition:
    transform var(--transition-base),
    opacity var(--transition-base);
}

.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);
}

/* ==========================================================================
   Theme toggle button
   ========================================================================== */

.theme-toggle {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: 18px;
  transition: color var(--transition-base);
  line-height: 1;
  /* Minimum 44x44 touch target (WCAG 2.5.5 / Fitts's Law) */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  border-radius: var(--radius-full);
}

.theme-toggle:hover {
  color: var(--color-accent);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.2px;
  cursor: pointer;
  border: none;
  transition:
    opacity var(--transition-base),
    background var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base);
}

.btn--primary {
  background: var(--color-btn-primary-bg);
  color: var(--color-btn-primary-fg);
  padding: 14px var(--space-7);
  border-radius: var(--radius-sm);
}

.btn--primary:hover {
  opacity: 0.9;
}

.btn--ghost {
  background: none;
  color: var(--color-btn-ghost-fg);
  padding: 0;
}

.btn--ghost:hover {
  color: var(--color-accent);
}

.btn--pill {
  background: none;
  color: var(--color-accent);
  border: 1px solid var(--color-accent-soft);
  padding: var(--space-2) 18px;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
}

.btn--pill:hover {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

/* ==========================================================================
   Work cards (home page)
   ========================================================================== */

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
  display: block;
  color: inherit;
  transition:
    background var(--transition-base),
    border-color var(--transition-base);
}

.card:hover {
  background: var(--color-card-bg-hover);
  border-color: var(--color-border-hover);
}

/* Placeholder / "coming soon" card — non-interactive, no hover affordance. */
.card--soon {
  opacity: 0.55;
  cursor: default;
}

.card--soon:hover {
  background: var(--color-surface);
  border-color: var(--color-border);
}

.card__number {
  position: absolute;
  top: var(--space-5);
  right: var(--space-6);
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 800;
  color: var(--color-card-number);
  line-height: 1;
  user-select: none;
}

.card__tag {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
  letter-spacing: -0.3px;
}

.card__desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  font-weight: 300;
}

.card__arrow {
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: color var(--transition-base);
}

.card:hover .card__arrow {
  color: var(--color-accent);
}

/* ==========================================================================
   Contact links
   ========================================================================== */

.contact-link {
  font-size: var(--text-md);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-accent-soft);
  padding-bottom: 2px;
  transition:
    color var(--transition-base),
    border-color var(--transition-base);
}

.contact-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ==========================================================================
   Status bar
   ========================================================================== */

.status-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  padding: var(--space-5) var(--container-pad);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-sm);
  color: var(--color-status-text);
  position: relative;
  z-index: 2;
}

.status-bar__dot {
  width: 7px;
  height: 7px;
  background: var(--color-sage);
  border-radius: var(--radius-full);
  flex-shrink: 0;
  animation: blink 2s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.25; }
}

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

.footer {
  padding: var(--space-10) 0;
  text-align: center;
  font-size: 14px;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-divider);
  position: relative;
  z-index: 2;
}

.footer__link {
  color: var(--color-accent);
  margin-top: var(--space-2);
  display: inline-block;
  transition: opacity var(--transition-base);
}

.footer__link:hover {
  opacity: 0.75;
}

/* ==========================================================================
   Responsive overrides
   ========================================================================== */

@media (max-width: 768px) {
  .nav {
    padding: var(--space-5) var(--space-5);
    flex-wrap: wrap;
  }

  .nav__logo   { order: 0; }
  .nav__actions { order: 1; }
  .nav__links  { order: 2; }

  /* Show the hamburger, hide the in-bar CTA (reachable via menu + footer) */
  .nav__toggle {
    display: flex;
  }

  .nav .btn--pill,
  .nav__back {
    display: none;
  }

  /* Section links become a collapsible panel below the bar */
  .nav__links {
    display: flex;
    flex-basis: 100%;
    flex-direction: column;
    gap: 0;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    transition:
      max-height var(--transition-slow),
      opacity var(--transition-base),
      visibility var(--transition-base);
  }

  .nav__links.is-open {
    max-height: 60vh;
    opacity: 1;
    visibility: visible;
    margin-top: var(--space-4);
  }

  .nav__links li {
    border-top: 1px solid var(--color-border);
  }

  .nav__links a {
    display: block;
    padding: var(--space-4) var(--space-1);
    font-size: var(--text-md);
  }

  .cards {
    grid-template-columns: 1fr;
  }
}