/* ==========================================================================
   Layout - Header, Footer, Section Layouts
   ========================================================================== */

/* Modern Header */
header.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
}

.brand img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--primary);
  box-shadow: var(--shadow-md);
}

.navlinks {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
  align-items: center;
}

.navlinks a {
  padding: var(--space-sm) var(--space);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  position: relative;
}

.navlinks a:hover {
  color: var(--primary);
  background: var(--gray-100);
  transform: translateY(-1px);
}

.navlinks a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.navlinks a:hover::after {
  width: 80%;
}

/* Modern Section Layout */
.section {
  padding: calc(var(--space-3xl) * 0.7) 0;
}

.section h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: var(--space-xl);
  color: var(--primary);
  text-align: center;
  position: relative;
}

.section h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 2px;
}

/* Modern Footer */
.footer {
  padding: calc(var(--space-2xl) * 0.7);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  margin-top: calc(var(--space-3xl) * 0.7);
}

/* Spacing compaction (0.7x) for cards and grids */
.card {
  padding: calc(var(--space-2xl) * 0.7);
}

.grid-2 {
  gap: calc(var(--space-2xl) * 0.7);
}

.grid-3 {
  gap: calc(var(--space-xl) * 0.7);
}

.kv .kv-item {
  padding: calc(var(--space-xl) * 0.7);
}

.footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.footer a:hover {
  color: var(--primary-dark);
}

/* Hamburger toggle (desktop default: hidden; mobile'da responsive.css açacak) */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  background: var(--white);
  cursor: pointer;
}

/* İkon (3 çizgi, saf CSS) */
.nav-toggle .nav-toggle-bar,
.nav-toggle .nav-toggle-bar::before,
.nav-toggle .nav-toggle-bar::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  position: relative;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle .nav-toggle-bar::before { position: absolute; top: -6px; left: 0; }
.nav-toggle .nav-toggle-bar::after  { position: absolute; top:  6px; left: 0; }

/* Açıkken X’e dönüşsün */
#nav-toggle[aria-expanded="true"] .nav-toggle-bar {
  transform: rotate(45deg);
}
#nav-toggle[aria-expanded="true"] .nav-toggle-bar::before {
  transform: rotate(90deg) translateX(0);
  top: 0;
}
#nav-toggle[aria-expanded="true"] .nav-toggle-bar::after {
  opacity: 0;
}