/* ── Design tokens ─────────────────────────────── */
:root {
  --color-primary: #1a1a1a;
  --color-accent:  #e84545;
  --color-bg:      #ffffff;
  --color-surface: #f5f5f5;
  --color-muted:   #666666;
  --color-border:  #e0e0e0;
  --font-base: 'Inter', system-ui, sans-serif;
  --max-width: 1280px;
  --nav-height: 64px;
  --transition: 0.2s ease;
}

/* ── Reset ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font-base); color: var(--color-primary); background: var(--color-bg); line-height: 1.6; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* ── Utilities ─────────────────────────────────── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; }
.hidden { display: none !important; }

/* ── Typography ────────────────────────────────── */
h1, h2, h3 { font-weight: 700; line-height: 1.1; letter-spacing: -0.02em; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.125rem; }
.label { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-muted); }
.lead { font-size: 1.125rem; color: var(--color-muted); max-width: 60ch; line-height: 1.7; }

/* ── Buttons ───────────────────────────────────── */
.btn { display: inline-flex; align-items: center; padding: 0.875rem 2rem; font-family: var(--font-base); font-size: 0.8125rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; border: 2px solid transparent; cursor: pointer; transition: var(--transition); }
.btn-primary { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn-primary:hover { background: #c73333; border-color: #c73333; }
.btn-outline { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #fff; }

/* ── Navigation ────────────────────────────────── */
.nav { position: sticky; top: 0; z-index: 100; background: var(--color-bg); border-bottom: 1px solid var(--color-border); height: var(--nav-height); }
.nav .container { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav-logo img { margin-inline-end: 1rem; height:40px; display:block; }
.nav-brand .accent { color: var(--color-accent); }
.nav-brand { font-size: 1rem; font-weight: 900; letter-spacing: 0.08em; text-transform: uppercase; padding: .75rem 2rem; }
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a { font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; transition: color var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--color-accent); }

/* ── Footer ────────────────────────────────────── */
.footer { background: var(--color-primary); color: rgba(255,255,255,0.5); padding: 1.5rem 0; font-size: 0.8125rem; }
.footer .container { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; }

/* ── Hero ──────────────────────────────────────── */
.hero { position: relative; height: 90vh; min-height: 520px; display: flex; align-items: flex-end; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.72) 0%, rgba(0,0,0,0.08) 55%); }
.hero-content { position: relative; z-index: 1; color: #fff; width: 100%; padding-bottom: 5rem; }
.hero-content .container { display: flex; flex-direction: column; gap: 1rem; }
.hero-content h1 { color: #fff; }
.hero-subtitle { font-size: 1.125rem; opacity: 0.85; max-width: 48ch; }

/* ── About ─────────────────────────────────────── */
.about { padding: 6rem 0; }
.about-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 5rem; align-items: start; }
.about-text { display: flex; flex-direction: column; gap: 2rem; }
.about-heading { margin-top: 0.75rem; }
.category-blocks { display: flex; flex-direction: column; gap: 1rem; }
.category-block { border-left: 3px solid var(--color-accent); padding: 1rem 1.5rem; background: var(--color-surface); }
.category-block h3 { font-size: 0.8125rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.25rem; }
.category-block p { font-size: 0.875rem; color: var(--color-muted); }

/* ── Carousel ──────────────────────────────────── */
.carousel-section { padding: 5rem 0; background: var(--color-surface); }
.carousel-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 2rem; }
.carousel-controls { display: flex; gap: 0.5rem; }
.carousel-btn { width: 44px; height: 44px; border: 2px solid var(--color-primary); background: none; cursor: pointer; font-size: 1.125rem; transition: var(--transition); display: flex; align-items: center; justify-content: center; }
.carousel-btn:hover { background: var(--color-primary); color: #fff; }
.carousel-track-wrapper { overflow: hidden; }
.carousel-track { display: flex; gap: 1.5rem; transition: transform 0.4s ease; will-change: transform; }

/* ── Project card ──────────────────────────────── */
.project-card { flex: 0 0 320px; position: relative; overflow: hidden; background: var(--color-primary); display: block; }
.project-card > div { text-shadow: 0 0 2px rgba(0, 0, 0, .8); }
.project-card-img { width: 100%; height: 220px; object-fit: cover; transition: transform 0.4s ease; }
.project-card:hover .project-card-img { transform: scale(1.05); }
.project-card-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.78) 0%, transparent 55%); pointer-events: none; }
.project-card-body { position: absolute; bottom: 0; left: 0; right: 0; padding: 1.25rem; color: #fff; }
.project-card-name { font-weight: 700; font-size: 1rem; margin-bottom: 0.2rem; }
.project-card-location { font-size: 0.775rem; opacity: 0.75; margin-bottom: 0.6rem; }
.project-card-badge { display: inline-block; background: var(--color-accent); color: #fff; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; padding: 0.2rem 0.5rem; }

/* ── Projects overview ─────────────────────────── */
.projects-page { padding: 5rem 0; }
.projects-page-header { margin-bottom: 3rem; }
.filter-bar { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 2rem; }
.filter-btn { padding: 0.5rem 1.25rem; border: 2px solid var(--color-border); background: none; font-family: var(--font-base); font-size: 0.775rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; cursor: pointer; transition: var(--transition); }
.filter-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.filter-btn.active { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 2rem; }
.projects-grid .project-card { flex: none; width: 100%; }
.projects-grid .project-card-img { height: 260px; }

/* ── Project detail ────────────────────────────── */
.project-detail-hero { position: relative; height: 60vh; min-height: 400px; }
.project-detail-hero img { width: 100%; height: 100%; object-fit: cover; }
.project-detail-hero-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.65) 0%, transparent 55%); }
.project-detail-hero-content { position: absolute; bottom: 0; left: 0; right: 0; color: #fff; padding: 2.5rem 0; }
.project-detail-hero-content h1 { color: #fff; margin-top: 0.5rem; }
.project-detail-body { padding: 5rem 0; }
.project-omschrijving { font-size: 1.125rem; color: var(--color-muted); margin-bottom: 3rem; max-width: 70ch; line-height: 1.7; }

/* ── Slider ────────────────────────────────────── */
.slider { margin-bottom: 3rem; }
.slider-main { position: relative; overflow: hidden; background: #000; aspect-ratio: 16/9; }
.slider-main-img { width: 100%; height: 100%; object-fit: contain; }
.slider-arrow { position: absolute; top: 50%; transform: translateY(-50%); background: rgba(0,0,0,0.45); color: #fff; border: none; width: 48px; height: 48px; font-size: 1.5rem; cursor: pointer; z-index: 5; display: flex; align-items: center; justify-content: center; transition: background var(--transition); }
.slider-arrow:hover { background: var(--color-accent); }
.slider-arrow-prev { left: 12px; }
.slider-arrow-next { right: 12px; }
.slider-counter { position: absolute; bottom: 12px; right: 14px; color: rgba(255,255,255,0.8); font-size: 0.75rem; background: rgba(0,0,0,0.4); padding: 0.2rem 0.5rem; }
.slider-thumbs { display: flex; gap: 0.5rem; overflow-x: auto; padding: 0.5rem 0; scrollbar-width: thin; }
.slider-thumb { flex: 0 0 80px; height: 56px; object-fit: cover; cursor: pointer; opacity: 0.45; transition: opacity var(--transition); border: 2px solid transparent; }
.slider-thumb.active { opacity: 1; border-color: var(--color-accent); }

/* ── Factsheet ─────────────────────────────────── */
.factsheet { background: var(--color-surface); padding: 2rem; }
.factsheet-title { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--color-muted); margin-bottom: 1.5rem; }
.factsheet-row { display: grid; grid-template-columns: 160px 1fr; gap: 1rem; padding: 0.875rem 0; border-bottom: 1px solid var(--color-border); }
.factsheet-row:last-child { border-bottom: none; }
.factsheet-label { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--color-muted); padding-top: 0.1rem; }
.factsheet-value { font-size: 0.9375rem; white-space: pre-line; }

/* ── Back link ─────────────────────────────────── */
.back-link { display: inline-flex; align-items: center; gap: 0.5rem; margin-top: 3rem; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-muted); transition: color var(--transition); }
.back-link:hover { color: var(--color-accent); }

/* ── Contact ───────────────────────────────────── */
.contact-page { padding: 5rem 0; }
.contact-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 5rem; margin-top: 3rem; }
.contact-info { display: flex; flex-direction: column; gap: 2rem; }
.contact-field-label { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-muted); margin-bottom: 0.4rem; }
.contact-info a { color: var(--color-accent); }
.contact-map iframe { width: 100%; height: 420px; border: none; display: block; }

/* ── Responsive ────────────────────────────────── */
@media (max-width: 1024px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}
@media (max-width: 640px) {
  .projects-grid { grid-template-columns: 1fr; }
  .factsheet-row { grid-template-columns: 1fr; gap: 0.2rem; }
  .nav-links { gap: 1.5rem; }
  .hero { height: 75vh; }
  .container { padding: 0 1rem; }
  .hide-sm { display: none; }
}