/* ==========================================================================
   Tasarım Sistemi & Değişkenler (Design System & Variables)
   ========================================================================== */
:root {
  /* Renk Paleti (Color Palette) */
  --color-bg-main: #ffffff; 
  --color-bg-secondary: #f7f8fa; /* Canlı sitedeki açık gri arka plan */
  --color-bg-card: #ffffff;
  --color-text-main: #333333;
  --color-text-muted: #666666;
  --color-accent: #0a64b1; /* Canlı sitedeki Mavi (Barb Blue) */
  --color-accent-hover: #084c87;
  
  /* Tipografi (Typography) */
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  
  /* Boyutlar & Boşluklar (Spacing) */
  --container-width: 1200px;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --spacing-xxl: 8rem;
  
  /* Temaya Özel Şeffaf Renkler */
  --color-header-bg: rgba(255, 255, 255, 0.85);
  --color-header-bg-solid: rgba(255, 255, 255, 0.98);
  --hero-pattern-bg: #F3F3F3;
  --hero-pattern-line: #E1E1E1;
  --hero-overlay-start: rgba(247,248,250,1);
  --hero-overlay-mid: rgba(247,248,250,0.8);
  --hero-overlay-end: rgba(247,248,250,0);
  
  /* Efektler (Effects) */
  --transition-normal: all 0.3s ease;
  --border-radius: 12px;
  --border-radius-lg: 24px;
  --glass-border: 1px solid rgba(0, 0, 0, 0.05);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
  --color-bg-main: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-bg-card: #1e293b;
  --color-text-main: #f8fafc;
  --color-text-muted: #94a3b8;
  --glass-border: 1px solid rgba(255, 255, 255, 0.05);
  --color-header-bg: rgba(15, 23, 42, 0.85);
  --color-header-bg-solid: rgba(15, 23, 42, 0.98);
  --hero-pattern-bg: #0f172a;
  --hero-pattern-line: rgba(255,255,255,0.05);
  --hero-overlay-start: rgba(15,23,42,1);
  --hero-overlay-mid: rgba(15,23,42,0.8);
  --hero-overlay-end: rgba(15,23,42,0);
}

/* ==========================================================================
   Genel Sıfırlamalar (Reset & Base)
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px; /* Navbar yüksekliği kadar boşluk bırakır */
  font-family: var(--font-main);
  background-color: var(--color-bg-main);
  color: var(--color-text-main);
  line-height: 1.6;
  transition: background-color 0.4s ease, color 0.4s ease;
}

body {
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-normal);
}

ul {
  list-style: none;
}

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

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-main);
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xl);
  max-width: 900px;
}

.text-center {
  text-align: center;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  font-size: 0.9375rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
  border: none;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(10, 100, 177, 0.2);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
}

.btn-outline:hover {
  background-color: var(--color-accent);
  color: #fff;
}

/* ==========================================================================
   Header & Navbar
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: var(--spacing-md) 0;
  z-index: 1000;
  transition: var(--transition-normal);
  background: var(--color-header-bg);
  backdrop-filter: blur(10px);
  border-bottom: var(--glass-border);
}

.header.scrolled {
  background: var(--color-header-bg-solid);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

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

.mobile-menu-btn {
  display: none; /* Hide on desktop by default */
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-main);
  padding: 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--color-text-main);
}

.logo span {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
  flex: 1;
  margin-left: 4rem; /* Sol taraftaki logoya daha yakın başlasın */
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
}

.nav-icon-link {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem;
}

.nav-icon-link img {
  width: 26px;
  height: 26px;
  object-fit: contain;
}

.nav-contact-btn {
  color: white !important;
  padding: 0.5rem 1.5rem !important;
  margin-left: auto;
}

.switch-container {
  margin-left: 1rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  position: relative;
  padding: 152px 0 60px 0;
}

/* From Uiverse.io by kennyotsu-monochromia */ 
.hero-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: 1;
  --color: var(--hero-pattern-line);
  background-color: var(--hero-pattern-bg);
  background-image: linear-gradient(0deg, transparent 24%, var(--color) 25%, var(--color) 26%, transparent 27%,transparent 74%, var(--color) 75%, var(--color) 76%, transparent 77%,transparent),
      linear-gradient(90deg, transparent 24%, var(--color) 25%, var(--color) 26%, transparent 27%,transparent 74%, var(--color) 75%, var(--color) 76%, transparent 77%,transparent);
  background-size: 55px 55px;
  transition: background-color 0.4s ease;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--hero-overlay-start) 0%, var(--hero-overlay-mid) 50%, var(--hero-overlay-end) 100%);
  z-index: 2;
  transition: background 0.4s ease;
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 3;
  text-align: center;
  margin: 0 auto;
}

.hero-tag {
  display: inline-block;
  padding: 0.25rem 1rem;
  background: rgba(10, 100, 177, 0.1);
  color: var(--color-accent);
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  border: 1px solid rgba(10, 100, 177, 0.2);
}

.hero-title {
  font-size: 2.75rem;
  line-height: 1.15;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -1px;
  color: var(--color-text-main);
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

/* ==========================================================================
   Services Section (Hizmetler)
   ========================================================================== */
.services {
  padding: var(--spacing-lg) 0;
  background-color: var(--color-bg-main);
  position: relative;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: var(--spacing-lg);
}

.service-card {
  background: var(--color-bg-card);
  border: var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg) var(--spacing-lg);
  transition: var(--transition-normal);
  box-shadow: 0 4px 6px rgba(0,0,0,0.02);
}

.service-card:hover {
  transform: translateY(-10px);
  border-color: rgba(10, 100, 177, 0.2);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.service-icon {
  width: 80px;
  height: 80px;
  margin-bottom: var(--spacing-lg);
  border-radius: var(--border-radius);
  object-fit: cover;
  background-color: var(--color-bg-secondary);
}

.service-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-main);
}

.service-desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* ==========================================================================
   References (Referanslar) & Marquee
   ========================================================================== */
.references {
  padding: var(--spacing-lg) 0;
  background-color: var(--color-bg-secondary);
  border-top: var(--glass-border);
  border-bottom: var(--glass-border);
  overflow: hidden;
}

.marquee-container {
  overflow: hidden;
  position: relative;
  width: 100%;
  padding: 1rem 0;
  /* Kenarlarda solma efekti (fade effect) */
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-content {
  display: flex;
  align-items: center;
  width: max-content;
  animation: scroll 25s linear infinite;
  gap: 5rem; /* Öğeler arası boşluk */
}

.marquee-content:hover {
  animation-play-state: paused;
}

/* Dark mode'da logoların görünmesi için şeridi aydınlık yapma */
[data-theme="dark"] .marquee-container {
  background-color: rgba(255, 255, 255, 0.95);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem 0;
}

@keyframes scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(calc(-50% - 2.5rem)); } /* -50% of content minus half of gap */
}

.ref-item {
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.ref-item img {
  height: 75px;
  width: auto;
  max-width: 240px;
  object-fit: contain;
  transition: var(--transition-normal);
}

.ref-item:hover img {
  transform: scale(1.05);
}

/* ==========================================================================
   Values (Değerlerimiz)
   ========================================================================== */
.values {
  padding: var(--spacing-lg) 0;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.value-card {
  padding: 1.5rem;
  border-radius: 0.5rem;
  border-left: 6px solid;
  transition: all 0.3s ease-in-out;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  cursor: pointer;
  transform: scale(1);
}

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

.value-green {
  background-color: #14532d;
  border-left-color: #15803d;
}
.value-green:hover { background-color: #166534; }
.value-green .value-icon { color: #4ade80; }
.value-green .value-title { color: #dcfce7; }
.value-green .value-desc { color: rgba(220, 252, 231, 0.85); }

.value-blue {
  background-color: #1e3a8a;
  border-left-color: #1d4ed8;
}
.value-blue:hover { background-color: #1e40af; }
.value-blue .value-icon { color: #60a5fa; }
.value-blue .value-title { color: #dbeafe; }
.value-blue .value-desc { color: rgba(219, 234, 254, 0.85); }

.value-yellow {
  background-color: #713f12;
  border-left-color: #a16207;
}
.value-yellow:hover { background-color: #854d0e; }
.value-yellow .value-icon { color: #facc15; }
.value-yellow .value-title { color: #fef9c3; }
.value-yellow .value-desc { color: rgba(254, 249, 195, 0.85); }

.value-red {
  background-color: #7f1d1d;
  border-left-color: #b91c1c;
}
.value-red:hover { background-color: #991b1b; }
.value-red .value-icon { color: #f87171; }
.value-red .value-title { color: #fee2e2; }
.value-red .value-desc { color: rgba(254, 226, 226, 0.85); }

.value-icon {
  flex-shrink: 0;
}

.value-icon svg {
  width: 32px;
  height: 32px;
  stroke: currentColor;
}

.value-content {
  display: flex;
  flex-direction: column;
}

.value-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.value-desc {
  font-size: 0.95rem;
  line-height: 1.4;
}

/* ==========================================================================
   CTA Banner
   ========================================================================== */
.cta-banner {
  background-color: var(--color-accent);
  padding: var(--spacing-xl) 0;
  color: white;
}

/* ==========================================================================
   Footer & Contact
   ========================================================================== */
.footer {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-lg) 0 var(--spacing-md) 0;
  border-top: var(--glass-border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 3rem;
}

.footer-brand {
  flex: 1;
  min-width: 250px;
}

.footer-logo img {
  height: 32px;
  width: auto;
  object-fit: contain;
  margin-bottom: 1.5rem;
  margin-left: 0;
}

.footer-contact-row {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 250px;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--color-text-muted);
  text-align: left;
  font-size: 0.9rem;
}

.contact-item strong {
  color: var(--color-text-main);
  font-size: 0.9rem;
}

/* ==========================================================================
   References Logos (Marquee)
   ========================================================================== */
.ref-item img {
  object-fit: contain;
  transition: all 0.3s ease;
  padding: 0 15px; /* Logolar arasına biraz nefes alma payı */
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* ==========================================================================
   Animations & Utils (AOS-like custom logic)
   ========================================================================== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Desktop / Global Defaults for Mobile Button
   ========================================================================== */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-main);
  padding: 0.5rem;
}

/* ==========================================================================
   Responsive (Mobile View - 1059px and below)
   ========================================================================== */
@media (max-width: 1059px) {
  /* Header & Mobile Menu */
  .mobile-menu-btn {
    display: block;
    position: relative;
    z-index: 9999 !important;
  }
  
  .mobile-menu-btn svg {
    pointer-events: none;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    height: 100vh;
    background: #ffffff;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch; /* Override inherited center */
    padding: 6rem 0 2rem 0; /* Removed side padding so a tags can span full width perfectly */
    gap: 0; /* Remove gap so borders touch */
    box-shadow: 10px 0 20px rgba(0,0,0,0.1);
    transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    opacity: 1;
    visibility: visible;
    transform: none;
    border-bottom: none;
    backdrop-filter: none;
    margin-left: 0; /* Reset for mobile */
  }
  
  .nav-links.active {
    left: 0;
  }
  
  .nav-links li {
    width: 100%;
  }
  
  .nav-links a {
    display: block;
    font-size: 1.05rem;
    padding: 0.75rem 1.5rem;
    width: 100%;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    box-sizing: border-box;
  }
  
  .nav-links a.btn {
    display: block !important;
    width: auto !important;
    border-bottom: none;
    margin: 1rem 1.5rem 0 1.5rem !important;
    text-align: center !important;
  }
  
  .nav-links .nav-icon-link {
    display: flex !important;
    justify-content: flex-start !important;
    padding: 0.75rem 1.5rem !important;
    width: 100%;
    margin-left: 0 !important;
    border-bottom: 1px solid rgba(0,0,0,0.05);
  }
  
  .switch-container {
    margin-left: 1.5rem !important;
    margin-top: 1rem;
    align-self: flex-start;
  }

  /* Hero Section */
  .hero {
    padding: 100px 0 40px 0;
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .hero-desc {
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  /* Typography & Layouts */
  .section-title {
    font-size: 1.75rem;
  }
  
  .section-subtitle {
    font-size: 1rem;
  }

  .about-grid, 
  .values-grid, 
  .services-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .value-card {
    align-items: center;
    text-align: center;
  }

  /* Footer */
  .footer-content {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
    align-items: center;
    width: 100%;
  }
  
  .footer-contact-row {
    align-items: center;
    width: 100%;
  }
  
  .contact-item {
    text-align: center;
    align-items: center;
  }
  
  .footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .footer-logo {
    display: flex;
    justify-content: center;
    width: 100%;
  }
  
  .footer-brand img,
  .footer-logo img {
    margin-left: 0 !important;
  }
}

/* ==========================================================================
   WhatsApp Floating Button
   ========================================================================== */
.floating-wa {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: #25D366;
  color: #FFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
  z-index: 9998;
  transition: all 0.3s ease;
}

.floating-wa svg {
  width: 26px;
  height: 26px;
}

.floating-wa:hover {
  transform: scale(1.1) translateY(-5px);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
  color: #FFF;
}

@media (max-width: 1059px) {
  .floating-wa {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
  .floating-wa svg {
    width: 24px;
    height: 24px;
  }
}

/* ==========================================================================
   Blog Preview Section (RSS)
   ========================================================================== */
.blog-preview-section {
    background-color: var(--color-bg);
    padding: 64px 0;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.blog-card {
    background: #FFF;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--color-text);
}

.blog-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.blog-card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: #E1E1E1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

.blog-card-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.blog-card-date {
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.blog-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text);
    line-height: 1.4;
}

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

.blog-card-readmore {
    font-weight: 600;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s;
}

.blog-card:hover .blog-card-readmore {
    color: var(--color-accent);
}

@media (max-width: 1059px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
}

/* From Uiverse.io by chase2k25 - Scaled down to fit navbar */ 
/* Switch Container */
.switch-container {
  position: relative;
  width: 60px;
  height: 24px;
  background: #d6d6d6;
  border-radius: 25px;
  box-shadow: inset -3px -3px 6px #ffffff, inset 3px 3px 6px #b0b0b0;
  margin-left: 1rem;
}

/* Hidden Checkbox */
.toggle-checkbox {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* Switch Label (Interactive Area) */
.switch {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 100%;
  transform: translateY(-50%);
  border-radius: 25px;
  overflow: hidden;
  cursor: pointer;
}

/* Toggle Button */
.toggle {
  position: absolute;
  width: 32px;
  height: 20px;
  background: linear-gradient(145deg, #d9d9d9, #bfbfbf);
  border-radius: 25px;
  top: 2px;
  left: 2px;
  box-shadow: -1.5px -1.5px 3px #ffffff, 1.5px 1.5px 3px #b0b0b0;
  transition: all 0.3s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding-left: 5px;
}

/* LED Light */
.led {
  width: 4px;
  height: 4px;
  background: grey;
  border-radius: 50%;
  box-shadow: 0 0 4px 1px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease-in-out;
}

/* Active State for Toggle (ON) */
.toggle-checkbox:checked + .switch .toggle {
  left: 26px;
  background: linear-gradient(145deg, #cfcfcf, #a9a9a9);
  box-shadow: -1.5px -1.5px 3px #ffffff, 1.5px 1.5px 3px #8a8a8a;
}

.toggle-checkbox:checked + .switch .led {
  background: yellow;
  box-shadow: 0 0 7px 2px yellow;
}

/* Hover Effect */
.switch:hover .toggle {
  box-shadow: -2px -2px 6px #ffffff, 2px 2px 6px #9b9b9b;
}