/* ============================================
   TEMA 3: NEUMORPHISM
   Yumuşak 3D Gölgeler - Soft UI
   2026 Trend: Tactile Minimalist Design
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800&display=swap');

:root {
  --neu-bg: #e0e5ec;
  --neu-bg-dark: #d1d9e6;
  --neu-text: #2d3748;
  --neu-text-secondary: #4a5568;
  --neu-text-muted: #718096;
  --neu-accent: #667eea;
  --neu-accent-light: #764ba2;
  --neu-success: #48bb78;
  --neu-warning: #ed8936;
  --neu-error: #f56565;
  --neu-shadow-light: #ffffff;
  --neu-shadow-dark: #a3b1c6;
  --neu-radius: 16px;
  --neu-radius-sm: 12px;
}

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

body {
  font-family: 'Nunito', -apple-system, sans-serif;
  background: var(--neu-bg);
  color: var(--neu-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* Neumorphic Shadow Mixins */
.neu-raised {
  background: var(--neu-bg);
  box-shadow: 
    8px 8px 16px var(--neu-shadow-dark),
    -8px -8px 16px var(--neu-shadow-light);
}

.neu-sunken {
  background: var(--neu-bg);
  box-shadow: 
    inset 4px 4px 8px var(--neu-shadow-dark),
    inset -4px -4px 8px var(--neu-shadow-light);
}

.neu-concave {
  background: linear-gradient(145deg, var(--neu-bg-dark), #f0f5fd);
  box-shadow: 
    8px 8px 16px var(--neu-shadow-dark),
    -8px -8px 16px var(--neu-shadow-light);
}

.neu-convex {
  background: linear-gradient(145deg, #f0f5fd, var(--neu-bg-dark));
  box-shadow: 
    8px 8px 16px var(--neu-shadow-dark),
    -8px -8px 16px var(--neu-shadow-light);
}

/* Container */
.neu-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

/* Header */
.neu-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--neu-bg);
  padding: 16px 0;
}

.neu-header .neu-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.neu-logo-card {
  padding: 12px 24px;
  border-radius: var(--neu-radius);
  display: flex;
  align-items: center;
  gap: 12px;
}

.neu-logo-card i {
  font-size: 2rem;
  color: var(--neu-accent);
}

.neu-logo-card span {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--neu-text);
}

/* Navigation */
.neu-nav { display: flex; gap: 16px; }

.neu-nav a {
  padding: 12px 24px;
  border-radius: var(--neu-radius-sm);
  color: var(--neu-text-secondary);
  font-weight: 600;
  transition: all 0.3s ease;
  text-decoration: none;
}

.neu-nav a:hover {
  color: var(--neu-accent);
  box-shadow: 
    4px 4px 8px var(--neu-shadow-dark),
    -4px -4px 8px var(--neu-shadow-light);
}

.neu-nav a.active {
  box-shadow: 
    inset 3px 3px 6px var(--neu-shadow-dark),
    inset -3px -3px 6px var(--neu-shadow-light);
  color: var(--neu-accent);
}

/* CTA Button */
.neu-cta {
  padding: 14px 32px;
  border-radius: var(--neu-radius-sm);
  background: var(--neu-bg);
  color: var(--neu-accent);
  font-weight: 700;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 
    6px 6px 12px var(--neu-shadow-dark),
    -6px -6px 12px var(--neu-shadow-light);
}

.neu-cta:hover {
  box-shadow: 
    4px 4px 8px var(--neu-shadow-dark),
    -4px -4px 8px var(--neu-shadow-light);
  transform: translateY(1px);
}

.neu-cta:active {
  box-shadow: 
    inset 4px 4px 8px var(--neu-shadow-dark),
    inset -4px -4px 8px var(--neu-shadow-light);
  transform: translateY(2px);
}

/* Main Content */
.neu-main { padding-top: 100px; min-height: 100vh; }

/* Hero Section */
.neu-hero {
  padding: 80px 40px;
  margin: 40px 0;
  border-radius: var(--neu-radius);
  text-align: center;
}

.neu-hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--neu-text);
}

.neu-hero p {
  font-size: 1.2rem;
  color: var(--neu-text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
}

.neu-hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Button Variants */
.neu-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  border-radius: var(--neu-radius-sm);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
}

.neu-btn-primary {
  background: linear-gradient(145deg, #6b7bfa, #5d6bd8);
  color: white;
  box-shadow: 
    6px 6px 12px var(--neu-shadow-dark),
    -6px -6px 12px var(--neu-shadow-light);
}

.neu-btn-primary:hover {
  box-shadow: 
    4px 4px 8px var(--neu-shadow-dark),
    -4px -4px 8px var(--neu-shadow-light);
  transform: translateY(-2px);
}

.neu-btn-secondary {
  background: var(--neu-bg);
  color: var(--neu-text);
  box-shadow: 
    6px 6px 12px var(--neu-shadow-dark),
    -6px -6px 12px var(--neu-shadow-light);
}

.neu-btn-secondary:hover {
  box-shadow: 
    4px 4px 8px var(--neu-shadow-dark),
    -4px -4px 8px var(--neu-shadow-light);
}

/* Grid */
.neu-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.neu-grid-2 { grid-template-columns: repeat(2, 1fr); }
.neu-grid-3 { grid-template-columns: repeat(3, 1fr); }
.neu-grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Cards */
.neu-card {
  padding: 32px;
  border-radius: var(--neu-radius);
  transition: all 0.3s ease;
}

.neu-card:hover {
  transform: translateY(-4px);
  box-shadow: 
    12px 12px 24px var(--neu-shadow-dark),
    -12px -12px 24px var(--neu-shadow-light);
}

.neu-card-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 2rem;
  color: var(--neu-accent);
  background: var(--neu-bg);
  box-shadow: 
    inset 4px 4px 8px var(--neu-shadow-dark),
    inset -4px -4px 8px var(--neu-shadow-light);
}

.neu-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--neu-text);
}

.neu-card p {
  color: var(--neu-text-secondary);
  line-height: 1.7;
}

/* Stats */
.neu-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 48px 0;
}

.neu-stat {
  padding: 32px 24px;
  border-radius: var(--neu-radius);
  text-align: center;
}

.neu-stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--neu-accent);
  margin-bottom: 8px;
}

.neu-stat-label {
  font-size: 0.875rem;
  color: var(--neu-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

/* Input Fields */
.neu-input {
  width: 100%;
  padding: 16px 20px;
  border-radius: var(--neu-radius-sm);
  border: none;
  background: var(--neu-bg);
  color: var(--neu-text);
  font-size: 1rem;
  box-shadow: 
    inset 3px 3px 6px var(--neu-shadow-dark),
    inset -3px -3px 6px var(--neu-shadow-light);
  transition: all 0.3s ease;
}

.neu-input:focus {
  outline: none;
  box-shadow: 
    inset 5px 5px 10px var(--neu-shadow-dark),
    inset -5px -5px 10px var(--neu-shadow-light);
}

.neu-input::placeholder { color: var(--neu-text-muted); }

/* Toggle Switch */
.neu-toggle {
  position: relative;
  width: 60px;
  height: 32px;
  border-radius: 16px;
  background: var(--neu-bg);
  box-shadow: 
    inset 3px 3px 6px var(--neu-shadow-dark),
    inset -3px -3px 6px var(--neu-shadow-light);
  cursor: pointer;
  transition: all 0.3s ease;
}

.neu-toggle::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--neu-bg);
  box-shadow: 
    2px 2px 4px var(--neu-shadow-dark),
    -2px -2px 4px var(--neu-shadow-light);
  transition: all 0.3s ease;
}

.neu-toggle.active::after {
  left: 32px;
  background: var(--neu-accent);
}

/* Progress Bar */
.neu-progress {
  height: 20px;
  border-radius: 10px;
  background: var(--neu-bg);
  box-shadow: 
    inset 3px 3px 6px var(--neu-shadow-dark),
    inset -3px -3px 6px var(--neu-shadow-light);
  overflow: hidden;
  padding: 4px;
}

.neu-progress-bar {
  height: 100%;
  border-radius: 8px;
  background: linear-gradient(90deg, var(--neu-accent), var(--neu-accent-light));
  box-shadow: 
    2px 2px 4px var(--neu-shadow-dark),
    -2px -2px 4px var(--neu-shadow-light);
  transition: width 0.5s ease;
}

/* Badge */
.neu-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--neu-accent);
  background: var(--neu-bg);
  box-shadow: 
    3px 3px 6px var(--neu-shadow-dark),
    -3px -3px 6px var(--neu-shadow-light);
}

/* Tab Navigation */
.neu-tabs {
  display: flex;
  gap: 16px;
  padding: 8px;
  border-radius: var(--neu-radius);
  background: var(--neu-bg);
  box-shadow: 
    inset 3px 3px 6px var(--neu-shadow-dark),
    inset -3px -3px 6px var(--neu-shadow-light);
}

.neu-tab {
  padding: 12px 24px;
  border-radius: var(--neu-radius-sm);
  font-weight: 600;
  color: var(--neu-text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
}

.neu-tab.active {
  background: var(--neu-bg);
  color: var(--neu-accent);
  box-shadow: 
    4px 4px 8px var(--neu-shadow-dark),
    -4px -4px 8px var(--neu-shadow-light);
}

/* Footer */
.neu-footer {
  margin-top: 80px;
  padding: 48px 0;
  background: var(--neu-bg-dark);
  border-radius: var(--neu-radius) var(--neu-radius) 0 0;
}

.neu-footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
}

/* Section Title */
.neu-section-title {
  text-align: center;
  margin-bottom: 48px;
}

.neu-section-title h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--neu-text);
  margin-bottom: 12px;
  display: inline-block;
  padding: 16px 32px;
  border-radius: var(--neu-radius);
  box-shadow: 
    6px 6px 12px var(--neu-shadow-dark),
    -6px -6px 12px var(--neu-shadow-light);
}

.neu-section-title p {
  color: var(--neu-text-secondary);
  max-width: 500px;
  margin: 24px auto 0;
}

/* Responsive */
@media (max-width: 1024px) {
  .neu-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .neu-stats { grid-template-columns: repeat(2, 1fr); }
  .neu-footer-grid { grid-template-columns: repeat(2, 1fr); }
  .neu-nav { display: none; }
  .neu-hero h1 { font-size: 2.2rem; }
}

@media (max-width: 640px) {
  .neu-grid-2, .neu-grid-3, .neu-grid-4 { grid-template-columns: 1fr; }
  .neu-stats { grid-template-columns: 1fr; }
  .neu-footer-grid { grid-template-columns: 1fr; }
  .neu-hero { padding: 40px 20px; }
  .neu-hero h1 { font-size: 1.8rem; }
  .neu-section-title h2 { font-size: 1.5rem; padding: 12px 24px; }
}