/**
 * Denklem Bilgisayar — Düzen & Gezinme Mimarisi (layout.css)
 * Sticky Header • Dropdown Menüler • Off-Canvas Mobil Drawer • Akordeon Alt Menüler • Zengin Footer
 */

/* ==================== 1. TEMEL KONTEYNER VE BÖLÜM YAPISI ==================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section {
  padding-top: clamp(48px, 6vw, 96px);
  padding-bottom: clamp(48px, 6vw, 96px);
  position: relative;
}

.section-surface {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto clamp(36px, 5vw, 64px);
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background-color: #ecfdf5;
  color: #059669;
  border: 1px solid #d1fae5;
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 700;
  text-transform: none;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}

.section-title {
  font-size: var(--font-2xl);
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: var(--font-base);
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==================== 2. HEADER & MASAÜSTÜ GEZİNME ==================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  height: calc(var(--header-height) - 10px);
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-height: var(--touch-target-min);
}

.site-logo img {
  height: 52px;
  width: auto;
  max-height: 54px;
  transition: transform var(--transition-fast);
}

.site-logo:hover img {
  transform: scale(1.02);
}

/* Masaüstü Navigasyon */
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  color: var(--text-body);
  font-weight: 600;
  font-size: var(--font-sm);
  border-radius: var(--radius-sm);
  min-height: var(--touch-target-min);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-item:hover > .nav-link,
.nav-link.active {
  color: var(--primary-orange);
  background-color: var(--primary-orange-light);
}

.nav-chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-normal);
}

.nav-item:hover .nav-chevron {
  transform: rotate(180deg);
}

/* Masaüstü Dropdown Menü Kartı */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px;
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition-normal);
  z-index: 1050;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px);
}

.dropdown-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  color: var(--text-main);
  font-size: var(--font-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.dropdown-link:hover {
  background-color: var(--primary-orange-light);
  color: var(--primary-orange);
  transform: translateX(4px);
}

.dropdown-icon {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  background-color: var(--bg-subtle);
  color: var(--primary-orange);
}

.dropdown-link:hover .dropdown-icon {
  background-color: var(--primary-orange);
  color: #ffffff;
}

/* ==================== 3. MOBİL TETİKLEYİCİ VE DRAWER (OFF-CANVAS) ==================== */
.mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.mobile-toggle:hover {
  background-color: var(--primary-orange-light);
  color: var(--primary-orange);
}

/* Karartma Katmanı (Backdrop Overlay) */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-smooth);
  z-index: 1900;
}

.drawer-backdrop.active {
  opacity: 1;
  visibility: visible;
}

/* Mobil Drawer Menü Paneli */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -340px;
  width: min(340px, 85vw);
  height: 100vh;
  background-color: var(--bg-card);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.15);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  transition: right var(--transition-smooth);
  overflow-y: auto;
}

.mobile-drawer.active {
  right: 0;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-color);
}

.drawer-logo {
  height: 46px;
  width: auto;
}

.drawer-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 24px;
}

.drawer-body {
  padding: 16px 14px;
  flex: 1 1 auto;
}

.drawer-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.drawer-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  color: var(--text-main);
  font-weight: 600;
  font-size: var(--font-base);
  border-radius: var(--radius-sm);
  min-height: var(--touch-target-min);
}

.drawer-link:hover,
.drawer-link.active {
  background-color: var(--primary-orange-light);
  color: var(--primary-orange);
}

/* Mobil Akordeon (Accordion) Alt Menü */
.drawer-accordion-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  color: var(--text-main);
  font-weight: 600;
  font-size: var(--font-base);
  border-radius: var(--radius-sm);
  min-height: var(--touch-target-min);
}

.drawer-accordion-btn .accordion-icon {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-normal);
}

.drawer-accordion-btn.open {
  background-color: var(--bg-surface);
  color: var(--primary-orange);
}

.drawer-accordion-btn.open .accordion-icon {
  transform: rotate(180deg);
}

.drawer-accordion-content {
  display: none;
  padding: 6px 0 6px 16px;
  flex-direction: column;
  gap: 2px;
}

.drawer-accordion-content.open {
  display: flex;
}

.drawer-sublink {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  color: var(--text-body);
  font-size: var(--font-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
  min-height: var(--touch-target-min);
}

.drawer-sublink:hover {
  color: var(--primary-orange);
  background-color: var(--primary-orange-light);
}

/* Mobil Drawer Alt Aksiyon Butonları */
.drawer-footer {
  padding: 18px 20px;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ==================== 4. ZENGİN KURUMSAL FOOTER ==================== */
.site-footer {
  background-color: var(--navy-900);
  color: #e2e8f0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: auto;
}

.footer-top {
  padding-top: clamp(48px, 6vw, 80px);
  padding-bottom: clamp(36px, 5vw, 64px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-logo {
  height: 50px;
  width: auto;
}

.footer-desc {
  color: #94a3b8;
  font-size: var(--font-sm);
  line-height: 1.65;
  max-width: 340px;
}

.footer-title {
  color: #ffffff;
  font-size: var(--font-base);
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  color: #94a3b8;
  font-size: var(--font-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.footer-link:hover {
  color: #ffffff;
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0;
  font-size: var(--font-xs);
  color: #64748b;
}

.footer-bottom-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==================== 5. RESPONSIVE KIRILMA NOKTALARI (BREAKPOINTS) ==================== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .desktop-nav,
  .header-actions {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .site-header {
    height: var(--header-height-mobile);
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom-flex {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
}