/* ============================================
   OLIVER SIGNORINI — Shared Components
   Nav, Footer, Buttons, Cards
   ============================================ */

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: 0 var(--space-xl);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(250, 251, 253, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base),
              background var(--transition-base),
              height var(--transition-base);
}

.nav.scrolled {
  border-bottom-color: var(--border-light);
  height: 60px;
}

.nav__logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.03em;
  transition: color var(--transition-fast);
}

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

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

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link.active {
  color: var(--accent-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  padding: 10px;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

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

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

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

/* Mobile Nav */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  padding: var(--space-3xl) var(--space-xl);
  z-index: var(--z-overlay);
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.nav__mobile-menu.open {
  opacity: 1;
  transform: translateY(0);
}

.nav__mobile-link {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-light);
  transition: color var(--transition-fast);
}

.nav__mobile-link:hover,
.nav__mobile-link.active {
  color: var(--accent-primary);
}

/* Nav CTA Button */
.nav__cta {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  padding: 8px 20px;
  font-size: var(--text-sm);
  margin-left: var(--space-sm);
}

.nav--cta-visible .nav__cta {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

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

  .nav__cta {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__mobile-menu {
    display: block;
    pointer-events: none;
  }

  .nav__mobile-menu.open {
    pointer-events: auto;
  }

  .nav {
    padding: 0 var(--space-lg);
  }
}

/* --- Page Body Offset --- */
.page-body {
  padding-top: var(--nav-height);
}

/* --- Footer --- */
.footer {
  padding: var(--space-4xl) 0 var(--space-2xl);
  border-top: 1px solid var(--border-light);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-2xl);
}

.footer__brand {
  max-width: 340px;
}

.footer__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--text-primary);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-sm);
}

.footer__location {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

.footer__links {
  display: flex;
  gap: var(--space-3xl);
}

.footer__col-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}

.footer__col-link {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.footer__col-link:hover {
  color: var(--accent-primary);
}

.footer__bottom {
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer__copyright {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.footer__social {
  display: flex;
  gap: var(--space-md);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.footer__social-link:hover {
  color: var(--accent-primary);
  background: var(--accent-light);
}

.footer__social-link svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 768px) {
  .footer__inner {
    flex-direction: column;
  }

  .footer__links {
    flex-direction: column;
    gap: var(--space-xl);
  }

  .footer__col-link {
    padding: var(--space-sm) 0;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer__social-link {
    width: 44px;
    height: 44px;
  }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  padding: 14px 28px;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  line-height: 1;
}

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

.btn--primary:hover {
  background: var(--accent-secondary);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background: transparent;
  color: var(--accent-primary);
  border: 1.5px solid var(--accent-primary);
}

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

.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  padding: 14px 0;
}

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

.btn--ghost svg,
.btn--primary svg,
.btn--secondary svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(3px);
}

/* --- Cards --- */
.card {
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-base);
  cursor: default;
}

.card:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-md);
}

.card--clickable {
  cursor: pointer;
}

.card--clickable:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--accent-primary);
  background: var(--accent-light);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: var(--space-md);
}

.card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.card__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.card__meta {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* --- Tags --- */
.tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 100px;
  background: var(--accent-light);
  color: var(--accent-primary);
}

.tag--warm {
  background: #FDF2E9;
  color: var(--accent-warm);
}

/* --- Section Headers --- */
.section-header {
  margin-bottom: var(--space-3xl);
}

.section-header__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-primary);
  margin-bottom: var(--space-md);
}

.section-header__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-4xl);
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.section-header__desc {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* --- Divider --- */
.divider {
  height: 1px;
  background: var(--border-light);
  border: none;
  margin: var(--space-section) 0;
}

/* --- Stat / Proof Item --- */
.proof-item {
  text-align: center;
  padding: var(--space-xl);
}

.proof-item__value {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--text-3xl);
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.proof-item__label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

/* --- Blockquote --- */
.pullquote {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--accent-primary);
  border-left: 3px solid var(--accent-primary);
  padding-left: var(--space-xl);
  margin: var(--space-3xl) 0;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

/* --- Skip Link (Accessibility) --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--accent-primary);
  color: var(--white);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius);
  z-index: 100;
  font-size: var(--text-sm);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-md);
}