:root {
  --primary-dark: #002D62; /* Logodaki ana koyu lacivert */
  --primary-blue: #0077C8; /* Logodaki sol kanat açık mavi */
  --primary-green: #6CBE45; /* Logodaki sağ kanat fıstık yeşili */
  --dark-green: #008751; /* Logodaki sağ dış koyu yeşil */
  --light-bg: #F4F8FA; /* Çok açık mavi/gri arka plan */
  --white: #FFFFFF;
  --text-dark: #1A202C;
  --text-muted: #4A5568;
  --border-color: #E2E8F0;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
}

/* Sayfa Kaydırma / Reveal Efekti */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Header / Navigasyon */
header {
  background-color: var(--white);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 15px;
}

.logo-text h1 {
  font-size: 24px;
  color: var(--primary-dark);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 1px;
}

.logo-text p {
  font-size: 10px;
  color: var(--primary-green);
  font-weight: bold;
  letter-spacing: 1.5px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 20px;
}

nav a {
  text-decoration: none;
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s ease;
  padding-bottom: 5px;
  border-bottom: 2px solid transparent;
}

nav a:hover, nav a.active {
  color: var(--primary-blue);
  border-bottom-color: var(--primary-green);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, #001A3A 100%);
  color: var(--white);
  padding: 100px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(to right, var(--primary-blue), var(--primary-green));
}

.hero-container {
  max-width: 900px;
  margin: 0 auto;
}

.hero h2 {
  font-size: 40px;
  margin-bottom: 20px;
  color: var(--white);
  font-weight: 800;
  line-height: 1.3;
}

.hero p {
  font-size: 18px;
  margin-bottom: 30px;
  color: #E2E8F0;
  font-weight: 300;
}

.slogan-badge {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 14px;
  margin-bottom: 20px;
  color: var(--primary-green);
  font-weight: bold;
}

.btn {
  display: inline-block;
  background-color: var(--primary-green);
  color: var(--white);
  padding: 12px 28px;
  text-decoration: none;
  border-radius: 30px;
  font-weight: bold;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn:hover {
  background-color: #5aa136;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(108, 190, 69, 0.3);
}

.btn-secondary {
  background-color: transparent;
  border: 2px solid var(--primary-blue);
  color: var(--primary-blue);
}

/* Section Genel */
section {
  padding: 80px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

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

.section-bg .section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 32px;
  color: var(--primary-dark);
  margin-bottom: 15px;
  position: relative;
  display: inline-block;
  padding-bottom: 10px;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 25%;
  width: 50%;
  height: 4px;
  background: linear-gradient(to right, var(--primary-blue), var(--primary-green));
  border-radius: 2px;
}

.section-title p {
  color: var(--text-muted);
  font-size: 16px;
}

/* Giriş Metni */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.intro-text p {
  margin-bottom: 20px;
  color: var(--text-muted);
  text-align: justify;
}

.intro-list-box {
  background-color: var(--light-bg);
  padding: 30px;
  border-radius: 10px;
  border-left: 5px solid var(--primary-blue);
}

.intro-list-box h4 {
  color: var(--primary-dark);
  margin-bottom: 15px;
  font-size: 18px;
}

.intro-list-box ul {
  list-style: none;
}

.intro-list-box li {
  margin-bottom: 10px;
  position: relative;
  padding-left: 25px;
  font-size: 14px;
}

.intro-list-box li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary-green);
  font-weight: bold;
}

/* Kartlar */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  margin-bottom: 40px;
}

.feature-card {
  background-color: var(--white);
  padding: 25px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
  border-top: 3.5px solid var(--primary-blue);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 15px rgba(0,0,0,0.1);
}

.feature-card:nth-child(even) {
  border-top-color: var(--primary-green);
}

.feature-icon {
  font-size: 30px;
  margin-bottom: 15px;
}

.feature-card h4 {
  color: var(--primary-dark);
  margin-bottom: 10px;
  font-size: 16px;
}

.feature-card p {
  font-size: 13.5px;
  color: var(--text-muted);
}

.bullets-box {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 40px;
  background: var(--primary-dark);
  color: var(--white);
  padding: 30px;
  border-radius: 10px;
}

.bullet-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.bullet-icon {
  color: var(--primary-green);
  font-size: 20px;
}

/* Misyon & Vizyon */
.mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.mv-card {
  background-color: var(--white);
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.mv-card h3 {
  color: var(--primary-dark);
  font-size: 24px;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.mv-card h3::after {
  content: '';
  flex-grow: 1;
  height: 2px;
  background-color: var(--border-color);
}

.mv-card.mission h3::after {
  background: linear-gradient(to right, var(--primary-blue), transparent);
}

.mv-card.vision h3::after {
  background: linear-gradient(to right, var(--primary-green), transparent);
}

.mv-card p {
  font-size: 14.5px;
  color: var(--text-muted);
  text-align: justify;
}

/* Üyelik */
.membership-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.member-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 30px;
  text-align: center;
  transition: all 0.3s ease;
}

.member-card:hover {
  border-color: var(--primary-blue);
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.05);
}

.member-icon {
  font-size: 40px;
  margin-bottom: 20px;
}

.member-card h3 {
  color: var(--primary-dark);
  margin-bottom: 15px;
}

.member-card p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 60px;
}

/* Yönetim */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.team-card {
  background-color: var(--white);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
  border-bottom: 3.5px solid var(--primary-blue);
}

.team-card:nth-child(even) {
  border-bottom-color: var(--primary-green);
}

.team-card h4 {
  color: var(--primary-dark);
  font-size: 16px;
  margin-bottom: 5px;
}

.team-card p {
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
}

/* Galeri */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
}

.gallery-item {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 4/3;
  background-color: #E2E8F0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
}

.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 45, 98, 0.85);
  color: var(--white);
  padding: 10px;
  font-size: 13px;
  text-align: center;
  font-weight: 600;
}

/* SSS Akordeon */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
}

.faq-question {
  padding: 20px;
  font-weight: bold;
  color: var(--primary-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.3s ease;
}

.faq-question:hover {
  background-color: var(--light-bg);
}

.faq-question::after {
  content: '+';
  font-size: 20px;
  color: var(--primary-blue);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
  content: '-';
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-muted);
  font-size: 14.5px;
}

.faq-item.active .faq-answer {
  padding: 20px;
  max-height: 500px;
  border-top: 1px solid var(--border-color);
}

/* Form */
.form-box {
  background-color: var(--white);
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.05);
  padding: 40px;
  border-top: 4px solid var(--primary-green);
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--primary-dark);
  font-size: 14px;
}

.form-control {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-blue);
}

.form-checkboxes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

/* Footer */
footer {
  background-color: var(--primary-dark);
  color: var(--white);
  padding: 40px 20px;
  text-align: center;
  border-top: 4px solid var(--primary-green);
}

footer p {
  font-size: 14px;
  color: #A0AEC0;
}

/* 1. Başlıkların Sticky Menü Altında Kalmasını Önleme */
section, .section-bg {
  scroll-margin-top: 90px; /* Header yüksekliğine göre (80px + 10px güvenli pay) ayarlandı */
}

/* 2. Scroll Progress Bar (Sayfa Üstündeki İlerleme Çubuğu) */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(to right, var(--primary-blue), var(--primary-green));
  width: 0%;
  z-index: 1001; /* Menünün de üzerinde görünmesi için */
  transition: width 0.1s ease-out;
}

/* 3. Yukarı Git Butonu (Görsel Efektli) */
#back-to-top {
  position: fixed;
  bottom: 30px;
  right: -60px; /* Başlangıçta ekranın dışında saklı */
  width: 45px;
  height: 45px;
  background-color: var(--primary-blue);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
  transition: right 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), background-color 0.3s ease;
  z-index: 999;
}

#back-to-top:hover {
  background-color: var(--primary-dark);
}

#back-to-top.show {
  right: 30px; /* Ekrana pürüzsüz bir yay efektiyle süzülerek girer */
}

@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 15px;
  }
  
  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }

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

  .form-grid-2 {
    grid-template-columns: 1fr;
  }

  .hero h2 {
    font-size: 28px;
  }
}