/* ============================================
   Caloriebehoefte Berekenen - Main Stylesheet
   ============================================ */

/* CSS Variables */
:root {
  /* Colors - Dutch Orange Theme */
  --primary-color: #FF6B35;
  --primary-dark: #E85A2A;
  --primary-light: #FF8C61;
  --secondary-color: #4ECDC4;
  --secondary-dark: #3DB5AD;
  --accent-color: #45B7D1;
  --success-color: #28A745;
  --warning-color: #FFC107;
  --danger-color: #DC3545;
  
  /* Neutrals */
  --text-dark: #2C3E50;
  --text-medium: #5A6C7D;
  --text-light: #7F8C9A;
  --bg-white: #FFFFFF;
  --bg-light: #F8F9FA;
  --bg-gray: #E9ECEF;
  --border-color: #DEE2E6;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.6;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50%;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  line-height: var(--line-height-base);
  color: var(--text-dark);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--text-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

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

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* ============================================
   Layout Components
   ============================================ */

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

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.section-alt {
  background-color: var(--bg-light);
}

/* ============================================
   Header & Navigation
   ============================================ */

.site-header {
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.logo svg {
  width: 40px;
  height: 40px;
}

.main-nav {
  display: flex;
  align-items: center;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--text-dark);
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
  text-decoration: none;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-dark);
  cursor: pointer;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: var(--spacing-xs);
  margin-left: var(--spacing-lg);
}

.lang-switcher a {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  transition: all var(--transition-fast);
  border-bottom: none !important;
}

.lang-switcher a:hover {
  background-color: var(--bg-light);
  text-decoration: none;
}

.lang-switcher a.active {
  background-color: var(--primary-color);
  color: var(--bg-white);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--bg-white);
  padding: var(--spacing-xxl) 0;
  text-align: center;
}

.hero h1 {
  color: var(--bg-white);
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.hero .subtitle {
  font-size: 1.25rem;
  opacity: 0.95;
  margin-bottom: var(--spacing-xl);
}

/* ============================================
   Calculator Section
   ============================================ */

.calculator-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  max-width: 600px;
  margin: 0 auto;
}

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

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-dark);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: var(--spacing-sm);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

/* Radio Buttons */
.radio-group {
  display: flex;
  gap: var(--spacing-md);
}

.radio-option {
  flex: 1;
}

.radio-option input[type="radio"] {
  display: none;
}

.radio-option label {
  display: block;
  padding: var(--spacing-sm);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.radio-option input[type="radio"]:checked + label {
  border-color: var(--primary-color);
  background-color: var(--primary-light);
  color: var(--bg-white);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--bg-white);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: var(--bg-white);
}

.btn-secondary:hover {
  background-color: var(--secondary-dark);
}

.btn-block {
  display: block;
  width: 100%;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
}

/* ============================================
   Results Display
   ============================================ */

.results-card {
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--accent-color) 100%);
  color: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-lg);
  display: none;
}

.results-card.show {
  display: block;
  animation: slideIn 0.5s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-main {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.result-number {
  font-size: 3rem;
  font-weight: 700;
  margin: var(--spacing-sm) 0;
}

.result-label {
  font-size: 1.25rem;
  opacity: 0.9;
}

.result-goals {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.goal-card {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
}

.goal-card h4 {
  color: var(--bg-white);
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
}

.goal-number {
  font-size: 1.5rem;
  font-weight: 700;
}

/* Macros Display */
.macros-display {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.macros-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  text-align: center;
}

.macro-item {
  padding: var(--spacing-sm);
}

.macro-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.macro-label {
  font-size: 0.875rem;
  opacity: 0.9;
}

/* Share Buttons */
.share-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-top: var(--spacing-lg);
  flex-wrap: wrap;
}

.share-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.2);
  color: var(--bg-white);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.share-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* ============================================
   Feature Cards
   ============================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.feature-card h3 {
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Goal Cards
   ============================================ */

.goals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.goal-link-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 2px solid transparent;
  text-align: center;
  display: block;
  color: var(--text-dark);
}

.goal-link-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
  text-decoration: none;
}

.goal-link-card .icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

/* ============================================
   FAQ Section
   ============================================ */

.faq-list {
  max-width: 800px;
  margin: var(--spacing-lg) auto 0;
}

.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-question {
  padding: var(--spacing-md);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  transition: background-color var(--transition-fast);
}

.faq-question:hover {
  background-color: var(--bg-light);
}

.faq-toggle {
  font-size: 1.5rem;
  color: var(--primary-color);
  transition: transform var(--transition-base);
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 var(--spacing-md);
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item.active .faq-answer {
  padding: var(--spacing-md);
  max-height: 500px;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  background-color: var(--text-dark);
  color: var(--bg-light);
  padding: var(--spacing-xxl) 0 var(--spacing-md);
}

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

.footer-section h4 {
  color: var(--bg-white);
  margin-bottom: var(--spacing-md);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-xs);
}

.footer-section a {
  color: var(--bg-light);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
}

/* ============================================
   Cookie Banner
   ============================================ */

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--text-dark);
  color: var(--bg-white);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  display: none;
}

.cookie-banner.show {
  display: block;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

.cookie-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.cookie-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }
  
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow-md);
    flex-direction: column;
  }
  
  .main-nav.active {
    display: flex;
  }
  
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }
  
  .main-nav li {
    border-bottom: 1px solid var(--border-color);
    width: 100%;
  }
  
  .main-nav a {
    display: block;
    padding: var(--spacing-md);
  }
  
  .lang-switcher {
    margin-left: 0;
    padding: var(--spacing-md);
    justify-content: center;
    border-top: 2px solid var(--border-color);
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .result-goals {
    grid-template-columns: 1fr;
  }
  
  .macros-grid {
    grid-template-columns: 1fr;
  }
  
  .cookie-content {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Utility Classes
   ============================================ */

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }

/* ============================================
   Print Styles
   ============================================ */

@media print {
  .site-header,
  .site-footer,
  .cookie-banner,
  .share-buttons {
    display: none;
  }
}