:root {
  /* Kleuren */
  --bg: #FAFAFA;
  --bg-white: #FFFFFF;
  --bg-dark: #0A0A0A;
  --bg-subtle: #F4F4F5;
  --text-primary: #0A0A0A;
  --text-secondary: #71717A;
  --text-light: #A1A1AA;
  --border: #E4E4E7;
  --border-subtle: #F4F4F5;
  --accent: #0A0A0A;
  --accent-hover: #27272A;
  --accent-light: #F4F4F5;
  --success: #22C55E;
  --tag-bg: #F0FDF4;
  --tag-text: #16A34A;

  /* Typography */
  --font-display: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --section-padding: 96px 0;
  --section-padding-sm: 64px 0;
  --container-max: 1200px;
  --container-padding: 0 24px;

  /* Borders */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
}

/* Reset + Base */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); background: var(--bg); color: var(--text-primary); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }

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

/* Typography */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; }
h1 { font-size: clamp(40px, 6vw, 72px); font-weight: 600; }
h2 { font-size: clamp(28px, 4vw, 48px); font-weight: 600; }
h3 { font-size: clamp(20px, 2.5vw, 28px); font-weight: 500; }
p { color: var(--text-secondary); font-size: 17px; line-height: 1.7; }

/* Sections */
section { padding: var(--section-padding); }
.section-label { font-size: 12px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-light); margin-bottom: 16px; }

/* Header */
header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,250,250,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 68px; display: flex; align-items: center;
}
header .container { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.logo { font-family: var(--font-display); font-size: 22px; font-weight: 600; color: var(--text-primary); text-decoration: none; letter-spacing: -0.02em; }

/* Buttons */
.btn-primary {
  background: var(--accent); color: white;
  border-radius: var(--radius-full);
  padding: 14px 28px; font-family: var(--font-body);
  font-weight: 500; font-size: 15px; border: none;
  cursor: pointer; transition: all 0.2s;
  text-decoration: none; display: inline-flex;
  align-items: center; gap: 8px;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary {
  background: transparent; color: var(--text-primary);
  border: 1.5px solid var(--border); border-radius: var(--radius-full);
  padding: 13px 28px; font-family: var(--font-body);
  font-weight: 500; font-size: 15px;
  cursor: pointer; transition: all 0.2s;
  text-decoration: none; display: inline-flex;
  align-items: center; gap: 8px;
}
.btn-secondary:hover { border-color: var(--accent); transform: translateY(-1px); }

/* Hero */
.hero { padding: 80px 0 96px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.hero-tag { display: inline-flex; align-items: center; gap: 8px; background: var(--tag-bg); color: var(--tag-text); font-size: 13px; font-weight: 500; padding: 6px 14px; border-radius: var(--radius-full); margin-bottom: 24px; }
.hero-title { margin-bottom: 20px; }
.hero-title em { font-style: italic; }
.hero-subtitle { font-size: 18px; color: var(--text-secondary); margin-bottom: 36px; max-width: 480px; }
.hero-cta { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.hero-social-proof { margin-top: 40px; display: flex; align-items: center; gap: 16px; }
.hero-avatars { display: flex; }
.hero-avatars img { width: 36px; height: 36px; border-radius: 50%; border: 2px solid white; margin-left: -8px; object-fit: cover; }
.hero-avatars img:first-child { margin-left: 0; }
.hero-proof-text { font-size: 14px; color: var(--text-secondary); }
.hero-proof-text strong { color: var(--text-primary); font-weight: 600; }
.hero-image { position: relative; }
.hero-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); width: 100%; object-fit: cover; max-height: 600px; }
.hero-image-badge {
  position: absolute; bottom: 24px; left: -24px;
  background: white; border-radius: var(--radius-md);
  padding: 16px 20px; box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 12px;
}
.hero-image-badge .badge-icon { font-size: 24px; }
.hero-image-badge .badge-text { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.hero-image-badge .badge-sub { font-size: 12px; color: var(--text-secondary); }

/* Problem sectie */
.problem-section { background: var(--bg-dark); color: white; }
.problem-section h2 { color: white; }
.problem-section p { color: #A1A1AA; }
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; margin-top: 64px; }
.problem-card { background: #18181B; padding: 40px 32px; }
.problem-card:first-child { border-radius: var(--radius-lg) 0 0 var(--radius-lg); }
.problem-card:last-child { border-radius: 0 var(--radius-lg) var(--radius-lg) 0; }
.problem-icon { font-size: 32px; margin-bottom: 20px; }
.problem-card h3 { color: white; font-size: 20px; margin-bottom: 12px; }
.problem-card p { color: #71717A; font-size: 15px; }

/* Systeem sectie */
.system-section { background: var(--bg-subtle); }
.system-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; margin-top: 64px; }
.system-steps { display: flex; flex-direction: column; gap: 32px; }
.system-step { display: flex; gap: 20px; align-items: flex-start; }
.step-number { width: 40px; height: 40px; background: var(--accent); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 14px; flex-shrink: 0; }
.step-content h3 { font-size: 18px; margin-bottom: 6px; }
.step-content p { font-size: 15px; }
.system-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

/* Kit sectie */
.kit-section { }
.kit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; margin-top: 64px; }
.kit-items { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.kit-item { display: flex; align-items: center; gap: 12px; padding: 16px; background: var(--bg-subtle); border-radius: var(--radius-md); }
.kit-item-icon { width: 40px; height: 40px; background: var(--accent-light); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; }
.kit-item-text { font-size: 14px; font-weight: 500; color: var(--text-primary); }
.resistance-levels { margin-top: 24px; }
.resistance-levels img { border-radius: var(--radius-md); }

/* Program Preview */
.preview-section { background: var(--bg-subtle); }
.preview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.preview-day { background: white; border-radius: var(--radius-md); padding: 28px; border: 1px solid var(--border); }
.preview-day-label { font-size: 12px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-light); margin-bottom: 8px; }
.preview-day-title { font-size: 18px; font-weight: 600; font-family: var(--font-display); margin-bottom: 20px; }
.preview-exercise { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--border-subtle); }
.preview-exercise:last-child { border-bottom: none; }
.preview-exercise-name { font-size: 14px; font-weight: 500; }
.preview-exercise-sets { font-size: 13px; color: var(--text-secondary); }

/* Founders */
.founders-section { }
.founders-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.founders-image img { border-radius: var(--radius-lg); }
.founders-quote { font-family: var(--font-display); font-size: clamp(22px, 3vw, 32px); font-style: italic; line-height: 1.4; margin-bottom: 32px; color: var(--text-primary); }
.founders-names { font-size: 15px; font-weight: 600; }
.founders-role { font-size: 14px; color: var(--text-secondary); }

/* FAQ */
.faq-section { background: var(--bg-subtle); }
.faq-list { max-width: 720px; margin: 48px auto 0; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-question { width: 100%; text-align: left; padding: 24px 0; background: none; border: none; font-size: 17px; font-weight: 500; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-family: var(--font-body); color: var(--text-primary); }
.faq-icon { width: 24px; height: 24px; border: 1.5px solid var(--border); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 16px; flex-shrink: 0; transition: transform 0.2s; color: var(--text-secondary); }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer { display: none; padding-bottom: 24px; color: var(--text-secondary); font-size: 16px; line-height: 1.7; }
.faq-item.open .faq-answer { display: block; }

/* Final CTA */
.cta-section { background: var(--bg-dark); color: white; text-align: center; padding: 120px 0; }
.cta-section h2 { color: white; max-width: 600px; margin: 0 auto 20px; }
.cta-section p { color: #A1A1AA; max-width: 480px; margin: 0 auto 40px; }
.cta-section .btn-primary { background: white; color: var(--bg-dark); font-size: 17px; padding: 18px 40px; }
.cta-section .btn-primary:hover { background: #F4F4F5; }

/* Footer */
footer { padding: 40px 0; border-top: 1px solid var(--border); }
footer .container { display: flex; justify-content: space-between; align-items: center; }
.footer-logo { font-family: var(--font-display); font-size: 18px; font-weight: 600; }
.footer-copy { font-size: 14px; color: var(--text-secondary); }

/* Quiz */
.quiz-page { min-height: 100vh; background: var(--bg); display: flex; flex-direction: column; }
.quiz-header { padding: 24px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 24px; }
.quiz-progress-bar { flex: 1; height: 4px; background: var(--border); border-radius: 2px; }
.quiz-progress-fill { height: 100%; background: var(--accent); border-radius: 2px; transition: width 0.4s ease; }
.quiz-progress-label { font-size: 14px; color: var(--text-secondary); white-space: nowrap; }
.quiz-body { flex: 1; display: flex; align-items: center; justify-content: center; padding: 48px 24px; }
.quiz-step { display: none; max-width: 600px; width: 100%; }
.quiz-step.active { display: block; }
.quiz-question { font-family: var(--font-display); font-size: clamp(22px, 3vw, 32px); font-weight: 600; margin-bottom: 8px; }
.quiz-subtitle { color: var(--text-secondary); font-size: 16px; margin-bottom: 36px; }
.quiz-options { display: flex; flex-direction: column; gap: 12px; }
.quiz-option { padding: 18px 20px; border: 1.5px solid var(--border); border-radius: var(--radius-md); cursor: pointer; transition: all 0.15s; display: flex; align-items: center; gap: 16px; }
.quiz-option:hover { border-color: var(--accent); background: var(--bg-subtle); }
.quiz-option.selected { border-color: var(--accent); background: var(--bg-subtle); }
.quiz-option input[type="radio"] { accent-color: var(--accent); width: 18px; height: 18px; flex-shrink: 0; }
.quiz-option-text { font-size: 16px; font-weight: 500; }
.quiz-option-sub { font-size: 14px; color: var(--text-secondary); }
.quiz-footer { padding: 24px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; }

/* Result pagina */
.result-hero { padding: 64px 0; text-align: center; background: var(--bg-subtle); }
.result-plan-tag { display: inline-flex; align-items: center; gap: 8px; background: var(--tag-bg); color: var(--tag-text); font-size: 14px; font-weight: 600; padding: 8px 16px; border-radius: var(--radius-full); margin-bottom: 20px; }
.result-title { font-size: clamp(28px, 4vw, 48px); font-family: var(--font-display); margin-bottom: 12px; }
.result-subtitle { font-size: 18px; color: var(--text-secondary); max-width: 560px; margin: 0 auto; }
.result-stats { display: flex; justify-content: center; gap: 40px; margin: 48px 0; flex-wrap: wrap; }
.result-stat { text-align: center; }
.result-stat-number { font-family: var(--font-display); font-size: 40px; font-weight: 600; }
.result-stat-label { font-size: 14px; color: var(--text-secondary); }
.result-preview { padding: 64px 0; }
.result-days { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin-top: 40px; }
.result-day { background: white; border: 1px solid var(--border); border-radius: var(--radius-md); padding: 24px; }
.result-day-label { font-size: 12px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-light); margin-bottom: 4px; }
.result-day-name { font-size: 17px; font-weight: 600; font-family: var(--font-display); margin-bottom: 16px; }
.result-exercise-item { font-size: 14px; color: var(--text-secondary); padding: 6px 0; border-bottom: 1px solid var(--border-subtle); display: flex; justify-content: space-between; }
.result-exercise-item:last-child { border-bottom: none; }
.result-cta { padding: 64px 0; background: var(--bg-subtle); text-align: center; }
.result-kit { display: flex; align-items: center; justify-content: center; gap: 40px; margin-bottom: 48px; flex-wrap: wrap; }
.result-kit-image { width: 280px; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.result-kit-items { text-align: left; }
.result-kit-item { display: flex; align-items: center; gap: 10px; padding: 8px 0; font-size: 15px; }
.result-kit-item::before { content: "✓"; color: var(--success); font-weight: 700; }
.result-price { font-family: var(--font-display); font-size: 48px; font-weight: 600; margin-bottom: 8px; }
.result-price-sub { font-size: 15px; color: var(--text-secondary); margin-bottom: 32px; }

/* Memberarea */
.member-page { min-height: 100vh; }
.member-header { padding: 40px 0; border-bottom: 1px solid var(--border); background: white; }
.member-welcome { font-size: 14px; color: var(--text-secondary); margin-bottom: 4px; }
.member-title { font-family: var(--font-display); font-size: 32px; font-weight: 600; }
.member-plan-tag { display: inline-flex; align-items: center; gap: 8px; background: var(--tag-bg); color: var(--tag-text); font-size: 13px; font-weight: 500; padding: 6px 14px; border-radius: var(--radius-full); margin-top: 12px; }
.member-stats { display: flex; gap: 32px; margin-top: 24px; flex-wrap: wrap; }
.member-stat { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-secondary); }
.member-stat strong { color: var(--text-primary); }
.member-content { padding: 48px 0; }
.training-days { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.training-day { background: white; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.training-day-header { padding: 24px; background: var(--bg-subtle); border-bottom: 1px solid var(--border); }
.training-day-label { font-size: 12px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-light); margin-bottom: 4px; }
.training-day-name { font-size: 20px; font-weight: 600; font-family: var(--font-display); }
.exercises-list { padding: 20px; display: flex; flex-direction: column; gap: 16px; }
.exercise-card { display: flex; gap: 16px; align-items: flex-start; padding: 16px; background: var(--bg-subtle); border-radius: var(--radius-md); }
.exercise-photo { width: 72px; height: 72px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; background: var(--border); }
.exercise-photo-placeholder { width: 72px; height: 72px; border-radius: var(--radius-sm); background: var(--accent-light); display: flex; align-items: center; justify-content: center; font-size: 28px; flex-shrink: 0; }
.exercise-info { flex: 1; }
.exercise-name { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.exercise-sets { font-size: 13px; color: var(--success); font-weight: 600; margin-bottom: 6px; }
.exercise-uitleg { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }

/* Shake animatie voor quiz validatie */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}
.shake { animation: shake 0.4s ease; }

/* Animaties */
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 768px) {
  section { padding: var(--section-padding-sm); }
  .hero { padding: 48px 0 64px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-image-badge { left: 12px; bottom: 12px; }
  .problem-grid { grid-template-columns: 1fr; gap: 2px; }
  .problem-card:first-child { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
  .problem-card:last-child { border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
  .system-grid { grid-template-columns: 1fr; gap: 40px; }
  .kit-grid { grid-template-columns: 1fr; gap: 40px; }
  .founders-grid { grid-template-columns: 1fr; gap: 40px; }
  .preview-grid { grid-template-columns: 1fr; }
  .result-stats { gap: 24px; }
  .result-days { grid-template-columns: 1fr; }
  .training-days { grid-template-columns: 1fr; }
  footer .container { flex-direction: column; gap: 16px; text-align: center; }
}