/* ==========================================================================
   ESTEMPO BİLGİSAYAR LTD. ŞTİ. - Warm Red Light Theme Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  /* Color Palette - Warm Red & Light Surface */
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-glass-card: rgba(255, 255, 255, 0.9);
  --bg-glass-hover: rgba(254, 242, 242, 0.8);

  --accent-red: #ef4444;
  --accent-red-light: #f87171;
  --accent-red-dark: #dc2626;
  --accent-red-glow: rgba(239, 68, 68, 0.15);
  --accent-crimson: #be123c;
  --accent-orange: #f97316;
  --accent-amber: #d97706;
  --accent-warm: #e11d48;

  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-light: rgba(0, 0, 0, 0.12);
  --border-accent: rgba(239, 68, 68, 0.4);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-dim: #94a3b8;

  /* Typography */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Layout & Spacing */
  --container-max: 1240px;
  --header-height: 80px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows & Effects */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow-red: 0 0 20px rgba(239, 68, 68, 0.2);

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Base Reset & Globals */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #fef2f2 0%, var(--bg-main) 50%);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout Helper Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
  position: relative;
}

/* Typography Helper Classes */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

.footer-tag {
  color: var(--text-secondary);
}

.text-gradient {
  background: linear-gradient(135deg, #0f172a 0%, #ef4444 50%, #f97316 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-red {
  background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title-wrapper {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 4rem auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--accent-red-dark);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.125rem;
}

/* Buttons System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-red) 0%, var(--accent-red-dark) 100%);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(239, 68, 68, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(239, 68, 68, 0.4);
  background: linear-gradient(135deg, var(--accent-red-light) 0%, var(--accent-red) 100%);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--accent-orange) 0%, #ea580c 100%);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(249, 115, 22, 0.25);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(249, 115, 22, 0.4);
}

.btn-outline {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: #fef2f2;
  border-color: var(--accent-red);
  color: var(--accent-red);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

/* Header & Glass Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-normal);
  border-bottom: 1px solid transparent;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-red) 0%, var(--accent-orange) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.25rem;
  box-shadow: var(--shadow-glow-red);
}

.brand-tag {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent-red);
  display: block;
  line-height: 1;
  margin-top: 2px;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-red);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-red);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  padding: 0.5rem;
}

/* ========== GÜVEN VERİR - Prominent Trust Section ========== */
.trust-hero {
  padding: 5rem 0 4rem 0;
  text-align: center;
  position: relative;
}

.trust-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(circle, rgba(239, 68, 68, 0.08) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}

/* ========== Trust Slider ========== */
.slider-container {
  width: 100%;
  max-width: 1100px;
  height: 550px;
  margin: -2rem auto 3rem auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
}

.slider-wrapper {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.slider-img {
  width: 100%;
  height: 100%;
  object-fit: fill;
  flex-shrink: 0;
}

.slider-img3 {
  width: 100%;
  height: 100%;
  object-fit: fill;
  flex-shrink: 0;
}

/* ========== First Slide Overlay ========== */
.first-slide-wrapper {
  position: relative;
  overflow: hidden;
  background-color: #0f172a;
}

.first-slide-wrapper>img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  transition: transform 0.8s ease;
}

.first-slide-wrapper:hover>img {
  transform: scale(1.05);
}

.slide-overlay-content {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  background: rgba(97, 98, 99, 0.55);
  display: flex;
  align-content: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  padding: 3rem 4rem;
}

.slide-tag {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  border: 1px solid rgba(255, 255, 255, 0.3);
  cursor: default;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transform: translateY(0);
}

.slide-tag:hover {
  background: linear-gradient(135deg, var(--accent-red) 0%, var(--accent-orange) 100%);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-5px) scale(1.08);
  box-shadow: 0 10px 25px rgba(239, 68, 68, 0.5);
  z-index: 10;
}

.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-primary);
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 10;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(4px);
}

.slider-btn:hover {
  background: var(--bg-surface);
  color: var(--accent-red);
  box-shadow: var(--shadow-md);
  transform: translateY(-50%) scale(1.05);
}

.prev-btn {
  left: 1.5rem;
}

.next-btn {
  right: 1.5rem;
}

.trust-badge-large {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 4.5rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, #dc2626 0%, #f97316 50%, #d97706 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
  animation: trustPulse 3s ease-in-out infinite;
  position: relative;
  z-index: 1;
}

@keyframes trustPulse {

  0%,
  100% {
    filter: brightness(1);
  }

  50% {
    filter: brightness(1.15);
  }
}

.trust-since {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-amber);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.trust-subtitle {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.trust-description {
  max-width: 800px;
  margin: 0 auto 1.5rem auto;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
}

/* ========== Misyon & Vizyon Section ========== */
.mission-vision-section {
  padding: 5rem 0;
  background: rgba(248, 250, 252, 0.6);
}

.mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-top: 2rem;
}

.mv-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.mv-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
}

.mv-card.misyon::before {
  background: linear-gradient(90deg, #ef4444, #f97316);
}

.mv-card.vizyon::before {
  background: linear-gradient(90deg, #f97316, #fbbf24);
}

.mv-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-light);
  box-shadow: var(--shadow-md);
}

.mv-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.mv-card.misyon .mv-icon {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
}

.mv-card.vizyon .mv-icon {
  background: rgba(249, 115, 22, 0.1);
  color: var(--accent-orange);
}

.mv-card h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.mv-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* Hero Section */
.hero {
  padding-top: calc(var(--header-height) + 4rem);
  padding-bottom: 6rem;
  position: relative;
  overflow: hidden;
}

.hero-glow-1 {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(239, 68, 68, 0.08) 0%, rgba(249, 115, 22, 0.03) 50%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1.1rem;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid var(--border-light);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.hero-badge .pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-red);
  box-shadow: 0 0 10px var(--accent-red);
  animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
  }

  70% {
    transform: scale(1.05);
    box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
  }

  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
  }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.hero-description {
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  width: 100%;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

/* Hero Showcase Card */
.hero-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  transition: transform var(--transition-normal);
}

.hero-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-accent);
}

.support-box {
  background: rgba(239, 68, 68, 0.05);
  border: 1px dashed rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  margin-bottom: 1.5rem;
}

.support-box-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-red-dark);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.support-box-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.download-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.quick-links-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.quick-link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.quick-link-item:hover {
  background: #fff;
  border-color: var(--accent-orange);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.quick-link-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.quick-link-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(249, 115, 22, 0.1);
  color: var(--accent-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.quick-link-title {
  font-size: 0.9rem;
  font-weight: 600;
}

.quick-link-arrow {
  color: var(--text-dim);
  transition: color var(--transition-fast);
}

.quick-link-item:hover .quick-link-arrow {
  color: var(--accent-orange);
}

/* Services Grid Section */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-orange));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-light);
  box-shadow: var(--shadow-lg);
  background: var(--bg-glass-hover);
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon-box {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(249, 115, 22, 0.1) 100%);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: var(--accent-red);
  margin-bottom: 1.5rem;
}

.service-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.service-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.service-features {
  list-style: none;
  margin-bottom: 1.5rem;
}

.service-features li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.service-features li i {
  color: var(--accent-red);
  font-size: 0.8rem;
}

/* E-Dönüşüm Portals Section */
.portals-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-md);
}

.portals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.portal-tile {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.8rem;
  display: flow;
  flex-direction: column;
  align-items: flex-start;
  transition: all var(--transition-normal);
}

.portal-tile:hover {
  background: #ffffff;
  border-color: var(--accent-red);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.portal-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red-dark);
  margin-bottom: 0.75rem;
}

.portal-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.portal-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

/* Software & Download Center Section */
.download-center {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  box-shadow: var(--shadow-sm);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-tab {
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.filter-tab:hover,
.filter-tab.active {
  background: var(--accent-red);
  color: #ffffff;
}

.search-box {
  position: relative;
  min-width: 260px;
}

.search-box input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.5rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: all var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--accent-red);
  background: #ffffff;
}

.search-box i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
}

.downloads-table-wrapper {
  overflow-x: auto;
}

.downloads-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.downloads-table th {
  padding: 1rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-subtle);
}

.downloads-table td {
  padding: 1.125rem 1.25rem;
  font-size: 0.925rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.downloads-table tr:hover td {
  background: rgba(0, 0, 0, 0.015);
}

.software-badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red-dark);
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.contact-info-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-details h4 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.contact-details p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.contact-form {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

::placeholder {
  color: var(--text-dim);
  opacity: 1;
}

.form-control {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-red);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

textarea.form-control {
  min-height: 130px;
  resize: vertical;
}

/* Footer */
.footer {
  background: #0f172a;
  border-top: 1px solid var(--border-subtle);
  padding: 5rem 0 2rem 0;
  color: #f8fafc;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  color: #94a3b8;
  font-size: 0.95rem;
  margin-top: 1rem;
  max-width: 320px;
}

.footer-col-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: #ffffff;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-red-light);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #64748b;
  font-size: 0.875rem;
}

/* Modal Dialog */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 550px;
  padding: 2.5rem;
  position: relative;
  transform: translateY(20px);
  transition: transform var(--transition-bounce);
  box-shadow: var(--shadow-lg);
}

.modal-backdrop.active .modal-card {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-size: 1.25rem;
  color: var(--text-muted);
  padding: 0.5rem;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.05);
}

.header-section-eta {
  display: flex;
  justify-content: center;
  margin-bottom: 35px;
}

/* ========== ETA Products Section ========== */
.eta-products-section {
  background: #00578a;
  padding: 2rem 0;
  border-top: 4px solid var(--accent-red);
}

.eta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.eta-card {
  display: flex;
  flex-direction: column;
}

.eta-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border: 4px solid #fff;
  border-radius: 2px;
  margin-bottom: 1rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform var(--transition-fast);
}

.eta-card:hover .eta-img {
  transform: scale(1.02);
}

.eta-btn {
  background: #f1f5f9;
  color: #00578a;
  text-align: center;
  padding: 0.75rem;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 4px;
  margin-bottom: 1.5rem;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.eta-btn:hover {
  background: #fff;
  color: var(--accent-red);
  transform: translateY(-2px);
}

.eta-btn i {
  margin-right: 0.5rem;
}

.eta-title {
  color: #ffffff;
  font-size: 1.05rem;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  min-height: 44px;
}

.eta-divider {
  width: 40px;
  height: 2px;
  background: var(--accent-red);
  margin-bottom: 1rem;
}

.eta-desc {
  color: #e2e8f0;
  font-size: 0.875rem;
  line-height: 1.6;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .mv-grid {
    grid-template-columns: 1fr;
  }

  .trust-badge-large {
    font-size: 3rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-md);
  }

  .nav-menu.active {
    transform: translateY(0);
  }

  .mobile-toggle {
    display: block;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .trust-badge-large {
    font-size: 2.5rem;
  }

  .trust-subtitle {
    font-size: 1.2rem;
  }
}

body.dark-theme {
  --bg-main: #0f172a;
  --bg-surface: #1e293b;
  --bg-surface-elevated: #334155;
  --bg-glass: rgba(15, 23, 42, 0.85);
  --bg-glass-card: rgba(30, 41, 59, 0.9);
  --bg-glass-hover: rgba(51, 65, 85, 0.8);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.12);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
}

body.dark-theme {
  background: radial-gradient(circle at 50% 0%, #1e1b4b 0%, var(--bg-main) 60%);
  color: var(--text-primary);
}

body.dark-theme .header {
  background: var(--bg-glass);
}

body.dark-theme .contact-form,
body.dark-theme .contact-info-card,
body.dark-theme .download-center,
body.dark-theme .portals-container,
body.dark-theme .hero-card,
body.dark-theme .mv-card,
body.dark-theme .service-card {
  background: var(--bg-surface);
  border-color: var(--border-subtle);
}

body.dark-theme .form-control,
body.dark-theme .search-box input,
body.dark-theme .quick-link-item,
body.dark-theme .portal-tile {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

/* Yukarı Çık (Back to Top) Butonu */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--accent-red);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  border: none;
  outline: none;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--accent-red-dark);
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(239, 68, 68, 0.4);
}

/* Tema Butonu Stili */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--accent-red);
  color: var(--accent-red);
}