/* ========================================
   Nurgül Koçak Executive Website - Styles
   High-End HR Consultancy Design System
   ======================================== */

/* ========== CSS Variables & Design Tokens ========== */
:root {
  /* Color Palette - Sophisticated Pastel Aqua Green Core */
  --color-primary: #7DCDCD;
  --color-primary-light: #A8E0E0;
  --color-primary-dark: #5AB9B9;
  
  /* Secondary Tones */
  --color-white: #FFFFFF;
  --color-off-white: #FAFAFA;
  --color-champagne: #F5E6D3;
  --color-gold: #D4AF37;
  --color-gold-light: #E8C872;
  
  /* Slate Grays */
  --color-slate-50: #F8FAFC;
  --color-slate-100: #F1F5F9;
  --color-slate-200: #E2E8F0;
  --color-slate-300: #CBD5E1;
  --color-slate-400: #94A3B8;
  --color-slate-500: #64748B;
  --color-slate-600: #475569;
  --color-slate-700: #334155;
  --color-slate-800: #1E293B;
  --color-slate-900: #0F172A;
  
  /* Typography */
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Montserrat', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-blur: 12px;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* ========== Reset & Base Styles ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-slate-700);
  background: linear-gradient(135deg, var(--color-off-white) 0%, var(--color-champagne) 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ========== Typography ========== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-slate-900);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
}

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

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
  margin-bottom: var(--spacing-sm);
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--color-slate-600);
}

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

/* ========== Utility Classes ========== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.section-alt {
  background: rgba(255, 255, 255, 0.4);
}

/* Glassmorphism Card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-light);
}

/* Gold Accent Line */
.accent-line {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-md);
}

/* Button Styles */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  outline: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ========== Navigation ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  max-width: 1440px;
  margin: 0 auto;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-slate-900);
  letter-spacing: -0.02em;
}

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

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--color-slate-700);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: var(--spacing-xs) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  background: none;
  border: none;
}

.nav-toggle span {
  width: 25px;
  height: 2px;
  background: var(--color-slate-700);
  transition: all var(--transition-base);
}

/* ========== Hero Section ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.hero-image {
  position: relative;
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.hero-image-wrapper::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, transparent 100%);
  opacity: 0.1;
  z-index: 1;
}

.hero-image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 3/4;
}

.hero-content {
  position: relative;
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.hero-title {
  margin-bottom: var(--spacing-md);
}

.hero-value-proposition {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 500;
  color: var(--color-slate-600);
  line-height: 1.6;
  margin-bottom: var(--spacing-xl);
  font-style: italic;
}

.hero-credentials {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.credential-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-slate-700);
}

.credential-icon {
  width: 20px;
  height: 20px;
  color: var(--color-gold);
}

/* ========== Expertise Pillars (Triangle Model) ========== */
.expertise {
  background: rgba(255, 255, 255, 0.5);
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-3xl);
}

.section-subtitle {
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.section-title {
  margin-bottom: var(--spacing-md);
}

.section-description {
  font-size: 1.125rem;
  color: var(--color-slate-600);
  margin-bottom: 0;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.pillar-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.pillar-card:hover::before {
  transform: scaleX(1);
}

.pillar-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-light);
}

.pillar-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 2rem;
}

.pillar-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-slate-900);
}

.pillar-description {
  color: var(--color-slate-600);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.pillar-features {
  list-style: none;
}

.pillar-features li {
  padding-left: var(--spacing-md);
  position: relative;
  margin-bottom: var(--spacing-xs);
  color: var(--color-slate-600);
  font-size: 0.95rem;
}

.pillar-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* ========== Timeline / Career Journey ========== */
.timeline {
  position: relative;
}

.timeline-container {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary-light), var(--color-gold));
  transform: translateX(-50%);
}

.timeline-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
  position: relative;
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-slow);
}

.timeline-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-item:nth-child(even) .timeline-content {
  grid-column: 2;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: auto;
  right: -21px;
}

.timeline-content {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  position: relative;
}

.timeline-dot {
  position: absolute;
  top: 24px;
  left: -21px;
  width: 16px;
  height: 16px;
  background: var(--color-gold);
  border: 4px solid var(--color-white);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  z-index: 10;
}

.timeline-date {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.timeline-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-slate-900);
}

.timeline-company {
  font-weight: 600;
  color: var(--color-slate-600);
  margin-bottom: var(--spacing-sm);
}

.timeline-description {
  color: var(--color-slate-600);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ========== Training Grid ========== */
.training-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.training-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  text-align: center;
}

.training-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.training-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--spacing-md);
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  transition: all var(--transition-base);
}

.training-card:hover .training-icon {
  background: var(--color-primary);
  transform: scale(1.1);
}

.training-title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-slate-900);
}

.training-description {
  font-size: 0.9rem;
  color: var(--color-slate-600);
}

/* ========== Psychology & Coaching Section ========== */
.psychology {
  background: linear-gradient(135deg, rgba(125, 205, 205, 0.1) 0%, rgba(255, 255, 255, 0.5) 100%);
  position: relative;
}

.psychology-container {
  max-width: 1000px;
  margin: 0 auto;
}

.psychology-content {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-xl);
}

.psychology-intro {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.psychology-quote {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-style: italic;
  color: var(--color-slate-700);
  margin: var(--spacing-xl) 0;
  padding-left: var(--spacing-lg);
  border-left: 4px solid var(--color-gold);
}

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

.methodology-item {
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
}

.methodology-item h4 {
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-sm);
}

/* ========== Footer ========== */
.footer {
  background: var(--color-slate-900);
  color: var(--color-slate-300);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

.footer-section h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

.footer-section p,
.footer-section a {
  color: var(--color-slate-400);
  font-size: 0.95rem;
  line-height: 1.8;
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-slate-800);
  color: var(--color-slate-500);
  font-size: 0.9rem;
}

.footer-bottom span {
  color: var(--color-primary);
}

/* ========== Responsive Design ========== */
@media (max-width: 1024px) {
  .timeline-line {
    left: 0;
    transform: none;
  }
  
  .timeline-item {
    grid-template-columns: 1fr;
    padding-left: var(--spacing-xl);
  }
  
  .timeline-item:nth-child(even) .timeline-content {
    grid-column: 1;
  }
  
  .timeline-dot {
    left: -21px !important;
    right: auto !important;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-3xl: 4rem;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(var(--glass-blur));
    width: 100%;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transition: left var(--transition-base);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .hero-image {
    order: 2;
  }
  
  .hero-content {
    order: 1;
    text-align: center;
  }
  
  .hero-credentials {
    justify-content: center;
  }
  
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  
  .training-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }
}

@media (max-width: 480px) {
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  .glass-card {
    padding: var(--spacing-md);
  }
  
  .pillar-card {
    padding: var(--spacing-lg);
  }
  
  .psychology-content {
    padding: var(--spacing-lg);
  }
}

/* ========== Animations ========== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}

/* Scroll Animations */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.scroll-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}