/* Layout CSS — Modern IturanMob */

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--background);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.container-fluid {
  width: 100%;
  padding: 0 var(--container-padding);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--spacing-xl);
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}
h3 {
  font-size: var(--font-size-2xl);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-base);
}

p {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
  color: var(--text-secondary);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  text-align: center;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: var(--header-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--transition-normal);
}

.header-scrolled {
  background: var(--header-bg-scrolled);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.header-hidden {
  transform: translateY(-100%);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  min-height: var(--header-height);
}

.logo img {
  height: 36px;
  width: auto;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav a {
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-full);
  transition: all var(--transition-fast);
  position: relative;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.nav a:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.nav a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--secondary-color);
  transition: all var(--transition-fast);
  transform: translateX(-50%);
  border-radius: 1px;
}

.nav a:hover::after {
  width: 60%;
}

/* Main Content */
main {
  margin-top: var(--header-height);
  position: relative;
}

/* Sections */
section {
  padding: var(--spacing-5xl) 0;
  position: relative;
}

/* Hero Section */
.hero {
  background: var(--gradient-subtle);
  text-align: center;
  padding: var(--spacing-xl) 0 var(--spacing-5xl);
  position: relative;
  overflow: hidden;
}

.hero .container {
  border-radius: var(--border-radius-2xl);
  overflow: hidden;
  position: relative;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: var(--spacing-3xl) var(--spacing-xl);
}

.hero h1 {
  max-width: 80%;
  margin: 0 auto var(--spacing-lg);
  font-size: clamp(var(--font-size-3xl), 4.5vw, var(--font-size-4xl));
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 70%;
  margin-left: auto;
  margin-right: auto;
  line-height: var(--line-height-relaxed);
}

/* Modules Grid */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin: var(--spacing-3xl) 0;
}

@media (max-width: 1024px) {
  .modules-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .modules-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

/* Video Container */
.video-container {
  width: 100%;
  max-width: 90%;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.video-container iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-2xl);
}

/* Contact Section */
.contact {
  background: var(--gradient-subtle);
  text-align: center;
  padding: var(--spacing-5xl) 0;
}

.contact h2 {
  margin-bottom: var(--spacing-xl);
}

/* Footer */
.footer {
  background: var(--primary-dark);
  color: white;
  padding: var(--spacing-3xl) 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
}

.footer-section h4 {
  color: white;
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  opacity: 0.6;
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-relaxed);
  font-size: var(--font-size-sm);
}

.footer-section a:hover {
  color: var(--secondary-color);
}

@media (prefers-color-scheme: dark) {
  .hero .container::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(10, 22, 40, 0.55);
    border-radius: var(--border-radius-2xl);
    z-index: 1;
    pointer-events: none;
  }

  .hero .container {
    position: relative;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}
.text-left {
  text-align: left;
}

.hidden {
  display: none;
}
.flex {
  display: flex;
}
.grid {
  display: grid;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.w-full {
  width: 100%;
}
.relative {
  position: relative;
}

/* Print */
@media print {
  .header,
  .nav,
  .modal,
  .btn {
    display: none !important;
  }
  main {
    margin-top: 0;
  }
  body {
    font-size: 12pt;
  }
}