/* ========================================
   UTILITIES
   ======================================== */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.section {
  padding: var(--space-32) var(--space-6);
}

.section--dark {
  background: var(--color-bg-dark);
  color: var(--color-text-light);
}

.section--dark h2,
.section--dark h3 {
  color: var(--color-text-light);
}

.section--dark p {
  color: var(--color-text-light-muted);
}

.section__container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-6);
  display: block;
}

.section--dark .section__label {
  color: var(--color-accent-light);
}

/* ========================================
   NAV
   ======================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-5) var(--space-6);
  background: transparent;
  backdrop-filter: none;
  transition: background 0.3s ease, backdrop-filter 0.3s ease;
  overflow: visible;
}

.nav--scrolled {
  background: rgba(10, 46, 31, 0.95);
  backdrop-filter: saturate(180%) blur(20px);
}

.nav--dark {
  background: rgba(10, 46, 31, 0.92);
}

.page-header {
  padding-top: calc(var(--space-40) + var(--space-6));
  padding-bottom: var(--space-16);
  padding-left: var(--space-6);
  padding-right: var(--space-6);
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.page-header__title {
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: var(--weight-light);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-6);
}

.page-header__subtitle {
  font-size: clamp(0.9rem, 1.5vw, 1.125rem);
  font-weight: var(--weight-light);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.section h2 {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: var(--weight-light);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: var(--space-8);
}

.section p {
  font-size: var(--text-base);
  line-height: 1.7;
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.nav__logo {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-light);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  flex-shrink: 0;
}

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

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  font-size: var(--text-xs);
  font-weight: var(--weight-normal);
  color: var(--color-text-light);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--transition-fast);
}

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

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

.nav__mobile-toggle {
  display: none;
  background: none;
  color: var(--color-text-light);
  font-size: var(--text-xl);
  padding: var(--space-2);
}

@media (max-width: 900px) {
  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 46, 31, 0.98);
    backdrop-filter: blur(20px);
    padding: var(--space-8);
    gap: var(--space-4);
  }

  .nav__links--open { display: flex; }
  .nav__mobile-toggle { display: block; }

  .nav__actions {
    gap: var(--space-2);
  }

  .lang-selector__btn {
    padding: var(--space-1) var(--space-1);
    font-size: 0.65rem;
  }
}

@media (max-width: 400px) {
  .nav__inner {
    gap: var(--space-2);
  }
  .nav__logo {
    font-size: var(--text-sm);
  }
}

/* ========================================
   LANGUAGE SELECTOR
   ======================================== */

.lang-selector {
  display: flex;
  align-items: center;
  gap: 2px;
}

.lang-selector__btn {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-normal);
  color: var(--color-text-light-muted);
  background: transparent;
  letter-spacing: 0.04em;
  transition: color var(--transition-fast);
}

.lang-selector__btn:hover { color: var(--color-text-light); }

.lang-selector__btn--active {
  color: var(--color-text-light);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all var(--transition-base);
}

.btn--primary {
  background: var(--color-accent);
  color: #ffffff;
  border-radius: 0;
}

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

.btn--ghost {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  border-radius: 0;
}

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

.btn--light {
  background: transparent;
  color: var(--color-text-light);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 0;
}

.btn--light:hover {
  border-color: #ffffff;
  color: #ffffff;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  padding: var(--space-12) var(--space-6);
  background: var(--color-bg-dark);
  border-top: none;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__links {
  display: flex;
  gap: var(--space-8);
}

.footer__link {
  font-size: var(--text-xs);
  color: var(--color-text-light-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.footer__link:hover { color: var(--color-text-light); }

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-light-muted);
  letter-spacing: 0.04em;
}

@media (max-width: 600px) {
  .footer__inner {
    flex-direction: column;
    gap: var(--space-6);
  }
  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
  }
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
  .page-header {
    padding-top: calc(var(--space-24) + var(--space-6));
    padding-bottom: var(--space-10);
  }
  .page-header__title {
    font-size: clamp(1.6rem, 8vw, 2.5rem);
  }
  .section {
    padding: var(--space-10) var(--space-4);
  }
  .section h2 {
    font-size: clamp(1.2rem, 5vw, 1.6rem);
  }
}

@media (max-height: 500px) and (orientation: landscape),
       (max-width: 768px) and (orientation: landscape),
       (max-height: 450px) {
  .nav {
    display: none !important;
  }
}