/* ============================================
   Layout — Navbar, Footer, Grid
   ============================================ */

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  z-index: var(--z-navbar);
  display: flex;
  align-items: center;
  padding: 0 var(--space-xl);
  transition: background var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.navbar.scrolled {
  background: rgba(26, 26, 46, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
}

.navbar__logo {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: var(--fw-bold);
  color: var(--text-light);
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.navbar__logo::after {
  content: '|';
  animation: blink 1s step-end infinite;
  color: var(--accent-coral);
}

@keyframes blink {
  50% { opacity: 0; }
}

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

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

.navbar__link {
  position: relative;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--text-light-muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-sm) 0;
  transition: color var(--duration-fast) var(--ease-out);
}

.navbar__link:hover,
.navbar__link.active { color: var(--text-light); }

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-coral);
  border-radius: var(--radius-full);
  transition: width var(--duration-normal) var(--ease-out);
}

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

/* ── Hamburger (Mobile) ── */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-sm);
  background: none;
  border: none;
  z-index: var(--z-navbar);
}

.navbar__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-light);
  border-radius: var(--radius-full);
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
}

.navbar__hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.navbar__hamburger.open span:nth-child(2) { opacity: 0; }
.navbar__hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── Mobile Menu ── */
.navbar__mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 46, 0.97);
  backdrop-filter: blur(20px);
  z-index: calc(var(--z-navbar) - 1);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xl);
}

.navbar__mobile-menu.open { display: flex; }

.navbar__mobile-link {
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  color: var(--text-light-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.navbar__mobile-link:hover,
.navbar__mobile-link.active { color: var(--accent-coral); }

/* ── Page ── */
.page { min-height: 100vh; padding-top: var(--navbar-height); }

.page-header { padding: var(--space-4xl) 0 var(--space-2xl); text-align: center; }
.page-header__title { font-size: var(--fs-h1); margin-bottom: var(--space-sm); }
.page-header__subtitle {
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  color: var(--text-light-muted);
  font-weight: var(--fw-regular);
  font-style: italic;
}

/* ── Section ── */
.section { padding: var(--space-3xl) 0; }
.section__header { margin-bottom: var(--space-2xl); }
.section__title { font-size: var(--fs-h2); margin-bottom: var(--space-sm); }
.section__subtitle { color: var(--text-light-muted); font-size: var(--fs-body); }

/* ── Grid ── */
.grid { display: grid; gap: var(--space-xl); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--auto-fill { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3xl); align-items: start; }

/* ── Footer ── */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: var(--space-2xl) 0;
  margin-top: var(--space-4xl);
}

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

.footer__left { display: flex; flex-direction: column; gap: var(--space-xs); }
.footer__brand { font-family: var(--font-heading); font-size: var(--fs-h4); color: var(--text-light); }
.footer__copy { font-size: var(--fs-xs); color: var(--text-light-muted); }

.footer__links { display: flex; gap: var(--space-lg); }
.footer__link {
  font-size: var(--fs-small);
  color: var(--text-light-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}
.footer__link:hover { color: var(--accent-coral); }

/* ── Responsive ── */
@media (max-width: 1199px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  .navbar__links { display: none; }
  .navbar__hamburger { display: flex; }
  .grid--2, .grid--3, .grid--4, .grid--auto-fill { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; gap: var(--space-xl); }
  .page-header { padding: var(--space-2xl) 0 var(--space-lg); }
  .footer__inner { flex-direction: column; gap: var(--space-lg); text-align: center; }
}