/* ==========================================================================
   Components — Buttons, cards, tags, nav
   ========================================================================== */

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-sm) 0;
  background: transparent;
  transition: background var(--transition), border-color var(--transition);
}

.nav.scrolled {
  background: rgba(245, 240, 232, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .nav.scrolled {
  background: rgba(26, 25, 23, 0.85);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  transition: color var(--transition);
}

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

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

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  letter-spacing: 0.01em;
}

.nav__link:hover {
  color: var(--text-primary);
}

.nav__theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.875rem;
  transition: border-color var(--transition), background var(--transition);
}

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

/* Hamburger (mobile) */
.nav__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 36px;
  height: 36px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav__hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 12px 28px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

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

.btn--ghost:hover {
  border-color: var(--text-primary);
  transform: translateY(-1px);
}

/* --- Cards (skill cards) --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.card__icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.card__title {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.card__desc {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--text-muted);
}

/* --- Tags --- */
.tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

/* --- Project row --- */
.project-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: border-color var(--transition);
}

.project-row:first-child {
  border-top: 1px solid var(--border);
}

.project-row:hover {
  border-color: var(--border-hover);
}

.project-row__left {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex: 1;
  min-width: 0;
}

.project-row__title {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  font-weight: 400;
  color: var(--text-primary);
  transition: color var(--transition);
}

.project-row:hover .project-row__title {
  color: var(--accent);
}

.project-row__arrow {
  font-size: 1.25rem;
  color: var(--text-muted);
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
}

.project-row:hover .project-row__arrow {
  transform: translate(3px, -3px);
  color: var(--accent);
}

/* --- Section header --- */
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.section-header__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  transition: color var(--transition);
}

.section-header__link:hover {
  color: var(--accent-hover);
}

/* --- Social links --- */
.social-links {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  transition: all var(--transition);
}

.social-link:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

/* --- Language switcher --- */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  padding: 3px;
}

.lang-switcher__btn {
  background: none;
  border: none;
  padding: 4px 10px;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lang-switcher__btn:hover {
  color: var(--text-primary);
}

.lang-switcher__btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* --- Scroll reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Mobile menu overlay --- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--bg-primary);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu__link {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 300;
  color: var(--text-primary);
  transition: color var(--transition);
}

.mobile-menu__link:hover {
  color: var(--accent);
}

/* --- Disco easter egg --- */
.disco-canvas {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  width: 100vw;
  height: 100vh;
}

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

@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .mobile-menu {
    display: flex;
  }

  .project-row__left {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }
}