/* ===================================
   DERSHANE WEB SİTESİ - MODERN TASARIM
   =================================== */

/* === ROOT DEĞİŞKENLER === */
:root {
  /* Renkler - Eğitim Temalı Gradyanlar */
  --primary-blue: #1e40af;
  --primary-orange: #fb923c;
  --primary-green: #10b981;
  --primary-purple: #8b5cf6;

  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
  --gradient-warm: linear-gradient(135deg, #fb923c 0%, #f59e0b 100%);

  /* Neutral Renkler */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.1);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  /* Shadows & Effects */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* === RESET & BASE === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* === TYPOGRAPHY === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

/* === CONTAINER === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

/* === HEADER & NAVIGATION === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
}

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

.logo-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  transition: var(--transition-fast);
}

.logo-container:hover {
  transform: translateY(-2px);
}

.logo-image {
  height: 60px;
  width: auto;
  transition: var(--transition-fast);
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* === HERO SECTION === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.6) 0%, rgba(118, 75, 162, 0.65) 100%),
    url('images/hero_background_students_1769896870184.png') center/cover no-repeat;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
  opacity: 0.3;
  animation: float 20s infinite linear;
}

@keyframes float {
  0% {
    transform: translateY(0);
  }

  100% {
    transform: translateY(-100px);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease;
}

.hero h1 {
  color: white;
  background: none;
  text-shadow: 3px 6px 20px rgba(0, 0, 0, 0.6), 1px 2px 6px rgba(0, 0, 0, 0.8);
  -webkit-text-fill-color: white;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: rgba(255, 255, 255, 0.98);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 2px 3px 12px rgba(0, 0, 0, 0.6), 1px 1px 4px rgba(0, 0, 0, 0.8);
  font-weight: 500;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-warm);
  color: white;
  box-shadow: 0 4px 16px rgba(251, 146, 60, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 28px rgba(251, 146, 60, 0.6);
}

.btn-primary:active {
  transform: translateY(-1px) scale(1.02);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* === SECTION HEADERS === */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-title {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* === PROGRAM CARDS === */
.programs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.program-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
  position: relative;
}

.program-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  border-radius: var(--radius-lg);
  z-index: 0;
}

.program-card:hover::after {
  opacity: 0.03;
}

.program-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: 0 12px 48px rgba(139, 92, 246, 0.4);
  border-color: rgba(139, 92, 246, 0.6);
}

.program-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: var(--transition-normal);
}

.program-card:hover .program-card-image {
  transform: scale(1.05);
}

.program-card-content {
  padding: var(--spacing-md);
}

.program-card-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.program-card-description {
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
}

.program-card-features {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
}

.feature-badge {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-glass);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* === STATS SECTION === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.stat-card {
  text-align: center;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.05) 100%);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.4s ease;
  border-radius: var(--radius-lg);
  z-index: -1;
}

.stat-card:hover::before {
  opacity: 0.1;
}

.stat-card:hover {
  transform: translateY(-8px) scale(1.03);
  border-color: rgba(139, 92, 246, 0.6);
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.3);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-success);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-top: var(--spacing-xs);
}

/* === TEACHERS SECTION === */
.teachers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.teacher-card {
  text-align: center;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.05) 100%);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.teacher-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.35);
  border-color: rgba(139, 92, 246, 0.5);
}

.teacher-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto var(--spacing-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  font-weight: 700;
  color: white;
}

.teacher-name {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.teacher-subject {
  color: var(--primary-orange);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.teacher-experience {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* === CONTACT FORM === */
.contact-section {
  background: var(--bg-secondary);
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing-xl);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--text-secondary);
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm);
  background: rgba(15, 23, 42, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-purple);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group input.error,
.form-group textarea.error {
  border-color: #ef4444;
}

.error-message {
  color: #ef4444;
  font-size: 0.85rem;
  margin-top: var(--spacing-xs);
  display: none;
}

.error-message.show {
  display: block;
}

/* === FOOTER === */
.footer {
  background: var(--bg-secondary);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-section h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.2rem;
}

.footer-section p,
.footer-section a {
  color: var(--text-muted);
  text-decoration: none;
  display: block;
  margin-bottom: var(--spacing-xs);
  transition: var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* === ANIMATIONS === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.fade-in.show {
  opacity: 1;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: var(--spacing-lg);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

  .nav-links.active {
    left: 0;
  }

  .menu-toggle {
    display: flex;
  }

  .logo-text {
    display: flex;
  }

  .logo-title {
    font-size: 0.9rem;
  }

  .logo-subtitle {
    font-size: 0.75rem;
  }

  .logo-image {
    height: 50px;
  }

  .hero {
    min-height: 80vh;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .programs-grid,
  .teachers-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  .section {
    padding: var(--spacing-xl) 0;
  }

  h1 {
    font-size: 2rem !important;
    font-weight: 800 !important;
  }

  .hero h1 {
    font-size: 2rem !important;
    color: white !important;
    background: none !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: white !important;
    background-clip: unset !important;
    text-shadow: 3px 6px 20px rgba(0, 0, 0, 0.9), 2px 3px 10px rgba(0, 0, 0, 1) !important;
    font-weight: 800 !important;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  .hero-subtitle {
    font-size: 1rem;
    font-weight: 500;
  }
}


/* === SCROLL TO TOP BUTTON === */
.scroll-to-top {
  position: fixed;
  bottom: 100px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 998;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.4);
}

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

.scroll-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.6);
}

/* === GOOGLE MAPS === */
.map-container {
  max-width: 800px;
  margin: 0 auto;
}

.map-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.map-wrapper iframe {
  display: block;
  width: 100%;
}

/* === RESPONSIVE FOR NEW FEATURES === */
@media (max-width: 768px) {
  .scroll-to-top {
    bottom: 30px;
    right: 20px;
    width: 45px;
    height: 45px;
  }

  .map-wrapper iframe {
    height: 300px;
  }
}