/* ==========================================================================
   GÜNTAY TURİZM - OORİJİNAL LOGO MAVİSİ KURUMSAL TEMA
   Logo Renk Kodları: Güntay Mavi (#164687), Beyaz (#FFFFFF), Siyah (#000000)
   ========================================================================== */

:root {
  /* Ekteki Logodan Birebir Çıkarılan Kurumsal Mavi */
  --guntay-blue: #164687;
  --guntay-blue-hover: #103466;
  --guntay-blue-light: #1c56a3;
  --guntay-blue-bg: #f0f4fa;
  --guntay-blue-accent: #2c6ac2;
  
  --navy-dark: #0b1526;
  --navy-card: #13223b;
  
  --text-dark: #0b1526;
  --text-gray: #475569;
  --text-light: #ffffff;
  
  --border-light: #cbd5e1;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: #f8fafc;
  color: var(--text-dark);
  line-height: 1.6;
}

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

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Logo Stilleri: Orijinal Mavi, Beyaz ve Siyah Varyasyonları */
.logo-img {
  height: 48px;
  width: auto;
  display: block;
  transition: var(--transition);
}

/* 1. Orijinal Mavi Logo (Varsayılan) */
.logo-blue {
  filter: none;
}

/* 2. Beyaz Logo (Koyu zeminler için) */
.logo-white {
  filter: brightness(0) invert(1);
}

/* 3. Siyah Logo (Monokrom alanlar için) */
.logo-black {
  filter: brightness(0);
}

/* ==========================================================================
   TOP BAR & HEADER NAVIGATION
   ========================================================================== */

.top-bar {
  background: var(--navy-dark);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.top-bar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-links {
  display: flex;
  gap: 20px;
}

.top-links a {
  color: #94a3b8;
  transition: var(--transition);
}

.top-links a:hover {
  color: #ffffff;
}

.top-contact {
  display: flex;
  align-items: center;
  gap: 20px;
}

.phone-badge {
  color: var(--guntay-blue-accent);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Main Navigation Bar */
.main-header {
  background: #ffffff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 90px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy-dark);
  padding: 30px 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--guntay-blue);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  width: 240px;
  background: #ffffff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  border-top: 4px solid var(--guntay-blue);
  list-style: none;
  padding: 12px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li a {
  display: block;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #334155;
  transition: var(--transition);
}

.dropdown-menu li a:hover {
  background: var(--guntay-blue-bg);
  color: var(--guntay-blue);
  padding-left: 26px;
}

.btn-partner {
  background: var(--guntay-blue);
  color: #fff !important;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
  transition: var(--transition);
}

.btn-partner:hover {
  background: var(--guntay-blue-hover);
  box-shadow: 0 4px 15px rgba(22, 70, 135, 0.35);
}

/* ==========================================================================
   HERO CAROUSEL / SLIDER SECTION
   ========================================================================== */

.hero-slider-section {
  position: relative;
  background: var(--navy-dark);
  color: #fff;
  overflow: hidden;
}

.slider-container {
  position: relative;
  height: 540px;
}

.slide-item {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
}

.slide-item.active {
  opacity: 1;
  z-index: 2;
}

.slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11, 21, 38, 0.9) 0%, rgba(11, 21, 38, 0.5) 60%, transparent 100%);
}

.slide-caption {
  position: relative;
  z-index: 5;
  max-width: 650px;
}

.slide-caption h2 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
  color: #ffffff;
}

.slide-caption p {
  font-size: 1.15rem;
  color: #cbd5e1;
  margin-bottom: 28px;
}

.btn-slide {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--guntay-blue);
  color: #fff;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn-slide:hover {
  background: var(--guntay-blue-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(22, 70, 135, 0.5);
}

/* Horizontal Slider Navigation Pills Bar */
.slider-pills-bar {
  background: rgba(11, 21, 38, 0.95);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  z-index: 10;
}

.pills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.pill-item {
  padding: 20px;
  text-align: center;
  color: #94a3b8;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border-bottom: 4px solid transparent;
  transition: var(--transition);
  background: transparent;
  border-left: none;
  border-right: none;
  border-top: none;
}

.pill-item:hover,
.pill-item.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.05);
  border-bottom-color: var(--guntay-blue);
}

/* ==========================================================================
   ABOUT BRIEF SECTION ("G" LETTER WRAPPER)
   ========================================================================== */

.about-brief-section {
  padding: 70px 0;
  background: #ffffff;
}

.about-brief-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  gap: 40px;
}

.letter-g {
  font-size: 10rem;
  font-weight: 900;
  color: var(--guntay-blue-bg);
  line-height: 0.8;
  user-select: none;
  position: absolute;
  left: -20px;
  top: -20px;
  z-index: 1;
}

.about-article {
  position: relative;
  z-index: 2;
  font-size: 1.2rem;
  line-height: 1.8;
  color: #334155;
  max-width: 1050px;
  margin-left: 60px;
}

.about-article strong {
  color: var(--guntay-blue);
}

.about-article a {
  color: var(--guntay-blue);
  font-weight: 700;
  margin-left: 8px;
  text-decoration: underline;
}

/* ==========================================================================
   SERVICES GRID SECTION (4 Large Cards)
   ========================================================================== */

.services-altur-section {
  padding: 60px 0 80px;
  background: #f1f5f9;
}

.section-h1 {
  font-size: 2.4rem;
  font-weight: 800;
  text-align: center;
  color: var(--navy-dark);
  margin-bottom: 40px;
}

.services-altur-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.service-altur-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 280px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  transition: var(--transition);
}

.service-altur-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 35px rgba(22, 70, 135, 0.25);
}

.service-altur-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.service-altur-card:hover img {
  transform: scale(1.08);
}

.card-overlay-altur {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(11, 21, 38, 0.92) 0%, rgba(11, 21, 38, 0.3) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  color: #fff;
}

.card-overlay-altur strong {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
  display: block;
  color: #ffffff;
}

.card-overlay-altur p {
  font-size: 0.95rem;
  color: #cbd5e1;
  line-height: 1.5;
}

/* ==========================================================================
   VIDEO SECTION & PARTNER BANNER
   ========================================================================== */

.corporate-video-section {
  padding: 60px 0;
  background: #ffffff;
}

.video-banner-box {
  display: grid;
  grid-template-columns: 3fr 1fr;
  background: var(--navy-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  color: #fff;
}

.video-thumb-container {
  position: relative;
  height: 320px;
}

.video-thumb-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
}

.btn-play-video {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: var(--guntay-blue);
  color: #fff;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  box-shadow: 0 0 30px rgba(22, 70, 135, 0.6);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-play-video:hover {
  transform: translate(-50%, -50%) scale(1.1);
  background: var(--guntay-blue-light);
}

.video-info-box {
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.video-info-box h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--guntay-blue-accent);
  margin-bottom: 12px;
}

.video-info-box p {
  color: #cbd5e1;
  font-size: 0.95rem;
}

/* Partner CTA Banner */
.academy-app-section {
  padding: 40px 0 80px;
}

.partner-cta-banner {
  background: linear-gradient(135deg, var(--guntay-blue), #1c56a3);
  border-radius: var(--radius-md);
  padding: 45px 40px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 15px 35px rgba(22, 70, 135, 0.3);
}

.partner-cta-text h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.partner-cta-text span {
  font-weight: 800;
  color: #f0f4fa;
}

.btn-join-partner {
  background: #ffffff;
  color: var(--guntay-blue);
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-join-partner:hover {
  background: var(--navy-dark);
  color: #fff;
  transform: translateY(-2px);
}

/* ==========================================================================
   FOOTER SECTION
   ========================================================================== */

.footer-altur {
  background: var(--navy-dark);
  color: #94a3b8;
  padding: 60px 0 30px;
  border-top: 4px solid var(--guntay-blue);
}

.footer-grid-altur {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col-altur h4 {
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-col-altur ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.footer-col-altur ul a:hover {
  color: #ffffff;
}

.footer-bottom-altur {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

/* ==========================================================================
   MODALS
   ========================================================================== */

.modal-altur-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 21, 38, 0.88);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 20px;
}

.modal-altur-overlay.active {
  display: flex;
}

.modal-altur-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 650px;
  padding: 36px;
  position: relative;
  color: var(--navy-dark);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.modal-altur-close {
  position: absolute;
  top: 18px;
  right: 18px;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: #64748b;
  cursor: pointer;
}

.form-grid-altur {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 20px;
}

.form-group-altur {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group-altur label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #475569;
}

.form-group-altur input,
.form-group-altur select {
  padding: 10px 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  outline: none;
}

.form-group-altur input:focus,
.form-group-altur select:focus {
  border-color: var(--guntay-blue);
}

.btn-submit-altur {
  grid-column: span 2;
  background: var(--guntay-blue);
  color: #fff;
  border: none;
  padding: 14px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  margin-top: 10px;
  transition: var(--transition);
}

.btn-submit-altur:hover {
  background: var(--guntay-blue-hover);
}

@media (max-width: 900px) {
  .main-nav {
    display: none;
  }
  .services-altur-grid {
    grid-template-columns: 1fr;
  }
  .video-banner-box {
    grid-template-columns: 1fr;
  }
  .partner-cta-banner {
    flex-direction: column;
    text-align: center;
    gap: 20px;
  }
  .footer-grid-altur {
    grid-template-columns: 1fr 1fr;
  }
  .form-grid-altur {
    grid-template-columns: 1fr;
  }
  .btn-submit-altur {
    grid-column: span 1;
  }
}