/* koopchromebook.nl — design system
   Palette matches the official logo (blue/red/yellow/green tiles),
   clean white/light-grey base inspired by google.com/chromebook */

:root {
  --blue: #3d85c6;
  --blue-dark: #2C5F91;
  --red: #cc0000;
  --red-dark: #990000;
  --yellow: #f1c232;
  --yellow-dark: #8A6300;
  --green: #6aa84f;
  --green-dark: #4F7F3B;

  --ink: #202124;
  --ink-soft: #3C4043;
  --grey: #5F6368;
  --grey-light: #80868B;
  --border: #DADCE0;
  --bg: #FFFFFF;
  --bg-alt: #F8F9FA;
  --bg-alt-2: #F1F3F4;

  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 20px;
  --shadow-s: 0 1px 3px rgba(60,64,67,.15), 0 1px 2px rgba(60,64,67,.10);
  --shadow-m: 0 2px 8px rgba(60,64,67,.15), 0 1px 3px rgba(60,64,67,.10);
  --shadow-l: 0 8px 24px rgba(60,64,67,.18), 0 2px 6px rgba(60,64,67,.10);

  --max: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink-soft);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--blue-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--ink); font-weight: 700; line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 4vw, 3.1rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); letter-spacing: -.01em; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
ul { margin: 0 0 1em; padding-left: 1.25em; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
section { padding: 56px 0; }
.section-alt { background: var(--bg-alt); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 24px;
}
.logo-link { display: flex; align-items: center; }
.logo-link svg { height: 30px; width: auto; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--ink-soft); font-weight: 600; font-size: .95rem;
  padding: 10px 14px; border-radius: var(--radius-s); text-decoration: none;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active { background: var(--bg-alt-2); color: var(--ink); }
.nav-toggle { display: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 700; font-size: .95rem; padding: 12px 22px;
  border-radius: 999px; border: 2px solid transparent; cursor: pointer;
  text-decoration: none; transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--blue); color: #fff; box-shadow: var(--shadow-s); }
.btn-primary:hover { background: var(--blue-dark); box-shadow: var(--shadow-m); transform: translateY(-1px); }
.btn-outline { background: #fff; color: var(--ink); border-color: var(--border); }
.btn-outline:hover { border-color: var(--grey-light); background: var(--bg-alt); }
.btn-red { background: var(--red); color: #fff; }
.btn-red:hover { background: var(--red-dark); }
.btn-sm { padding: 8px 16px; font-size: .85rem; }
.btn-block { width: 100%; }

/* ---------- hero ---------- */
.hero { padding: 72px 0 56px; background: linear-gradient(180deg,#F8F9FA 0%, #FFFFFF 100%); }
.hero .container { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: #E8F0FE; color: var(--blue-dark); font-weight: 700; font-size: .8rem;
  padding: 6px 14px; border-radius: 999px; margin-bottom: 18px;
}
.hero p.lead { font-size: 1.15rem; color: var(--grey); max-width: 46ch; }
.hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero-art {
  background: var(--bg-alt-2); border-radius: var(--radius-l); padding: 32px;
  display: grid; place-items: center; min-height: 280px;
}
.hero-stats { display: flex; gap: 28px; margin-top: 36px; flex-wrap: wrap; }
.hero-stats div strong { display: block; font-size: 1.6rem; color: var(--ink); }
.hero-stats div span { color: var(--grey); font-size: .85rem; }

/* ---------- cards / grids ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-m);
  overflow: hidden; transition: box-shadow .15s ease, transform .15s ease;
}
.card:hover { box-shadow: var(--shadow-m); transform: translateY(-2px); }

.product-card { display: flex; flex-direction: column; height: 100%; }
.product-card .thumb {
  background: var(--bg-alt); padding: 20px; display: grid; place-items: center; height: 190px;
}
.product-card .thumb img { max-height: 150px; object-fit: contain; }
.product-card .body { padding: 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.badge {
  display: inline-flex; align-items: center; font-size: .72rem; font-weight: 700;
  padding: 4px 10px; border-radius: 999px; text-transform: uppercase; letter-spacing: .03em;
  width: fit-content;
}
.badge-blue { background: #E7F0F8; color: var(--blue-dark); }
.badge-green { background: #EAF4E5; color: var(--green-dark); }
.badge-red { background: #FBE6E6; color: var(--red-dark); }
.badge-yellow { background: #FCF1DA; color: var(--yellow-dark); }
.badge-grey { background: var(--bg-alt-2); color: var(--grey); }
.badge-unavailable { background: #EDEDED; color: #6B6B6B; }
.product-card .brand { color: var(--grey); font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.product-card h3 { font-size: 1.02rem; margin: 0; }
.product-card .specs { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0; }
.spec-chip { background: var(--bg-alt-2); color: var(--ink-soft); font-size: .75rem; padding: 4px 9px; border-radius: 6px; }
.price-row { display: flex; align-items: baseline; justify-content: space-between; margin-top: auto; padding-top: 10px; }
.price { font-size: 1.35rem; font-weight: 800; color: var(--ink); }
.price small { font-size: .7rem; font-weight: 600; color: var(--grey); }

/* ---------- unavailable / discontinued products ---------- */
.product-card.is-unavailable .thumb img { opacity: .55; filter: grayscale(40%); }
.product-card.is-unavailable h3 { color: var(--grey); }
.price-old { color: var(--grey); text-decoration: line-through; font-weight: 700; font-size: 1.1rem; }
.unavailable-notice {
  display: flex; gap: 12px; align-items: flex-start;
  background: #F4F4F4; border: 1px solid #E0E0E0; border-radius: var(--radius-m);
  padding: 16px 18px; margin: 18px 0; color: var(--ink-soft); font-size: .92rem;
}
.unavailable-notice strong { color: var(--ink); }

/* ---------- catalog layout ---------- */
.catalog-layout { display: grid; grid-template-columns: 280px 1fr; gap: 32px; align-items: start; }
.filters {
  background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius-m);
  padding: 20px; position: sticky; top: 96px;
}
.filters h4 { font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; color: var(--grey); margin: 18px 0 10px; }
.filters h4:first-child { margin-top: 0; }
.filter-group { display: flex; flex-direction: column; gap: 8px; }
.filter-check { display: flex; align-items: center; gap: 8px; font-size: .9rem; color: var(--ink-soft); cursor: pointer; }
.filter-check input { accent-color: var(--blue); width: 16px; height: 16px; }
.range-row { display: flex; align-items: center; gap: 8px; font-size: .85rem; }
.range-row input[type=range] { flex: 1; accent-color: var(--blue); }
.filters .reset-link { font-size: .82rem; font-weight: 600; }
.results-bar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; flex-wrap: wrap; gap: 12px; }
.results-bar select { border: 1px solid var(--border); border-radius: var(--radius-s); padding: 8px 12px; font-family: var(--font); }
.empty-state { padding: 60px 20px; text-align: center; color: var(--grey); }

/* ---------- product detail ---------- */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.product-gallery { background: var(--bg-alt); border-radius: var(--radius-l); padding: 40px; display: grid; place-items: center; }
.product-gallery img { max-height: 340px; }
.spec-table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.spec-table tr { border-bottom: 1px solid var(--border); }
.spec-table td { padding: 10px 4px; font-size: .92rem; }
.spec-table td:first-child { color: var(--grey); width: 45%; }
.spec-table td:last-child { font-weight: 600; color: var(--ink); }
.affiliate-disclosure { font-size: .78rem; color: var(--grey-light); margin-top: 10px; }

/* ---------- blog ---------- */
.blog-card { display: flex; flex-direction: column; }
.blog-card .body { padding: 20px; }
.blog-card .meta { font-size: .78rem; color: var(--grey); display: flex; gap: 10px; align-items: center; margin-bottom: 8px; }
.blog-card .meta .post-date { text-decoration: none; }
.blog-card .thumb { height: 150px; background: linear-gradient(135deg,var(--blue),var(--green)); overflow: hidden; }
.blog-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.blog-card-thumb-link, .blog-card-thumb-link:hover { text-decoration: none; }
.blog-card-title-link, .blog-card-title-link:hover { color: inherit; }
.blog-card-title-link h3 { margin: 0; }
.blog-card .body p { color: var(--grey); }
.blog-card.c1 .thumb { background: linear-gradient(135deg,var(--blue),var(--blue-dark)); }
.blog-card.c2 .thumb { background: linear-gradient(135deg,var(--red),var(--red-dark)); }
.blog-card.c3 .thumb { background: linear-gradient(135deg,var(--yellow),var(--yellow-dark)); }
.blog-card.c4 .thumb { background: linear-gradient(135deg,var(--green),var(--green-dark)); }
.blog-card.c5 .thumb { background: linear-gradient(135deg,var(--blue),var(--green)); }
.blog-card.c6 .thumb { background: linear-gradient(135deg,#5F6368,#202124); }
.article-body { max-width: 720px; margin: 0 auto; font-size: 1.06rem; }
.article-body h2 { margin-top: 1.4em; }
.article-hero-image { max-width: 720px; margin: 0 auto 28px; }
.article-hero-image img { width: 100%; max-height: 380px; object-fit: cover; border-radius: var(--radius-m); }
.image-credit { font-size: .75rem; color: var(--grey-light); margin: 6px 0 0; }
.article-header { max-width: 720px; margin: 0 auto 32px; }
.article-header .meta { color: var(--grey); font-size: .9rem; }
.product-refs-box {
  background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius-m);
  padding: 18px; margin: 28px 0; max-width: 720px;
}
.product-refs-box h4 { font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; color: var(--grey); margin: 0 0 12px; }

/* ---------- tips ---------- */
.tip-card { display: flex; gap: 16px; padding: 18px; }
.tip-card .icon { width: 56px; height: 56px; flex-shrink: 0; }
.tip-card h3 { margin-bottom: 4px; font-size: 1.05rem; }
.category-pill {
  display: inline-block; padding: 6px 14px; border-radius: 999px; font-weight: 700; font-size: .85rem;
  background: var(--bg-alt-2); color: var(--ink-soft); margin: 4px 6px 4px 0;
}
.category-pill:hover { background: #E8F0FE; color: var(--blue-dark); text-decoration: none; }
.category-pill.active { background: var(--blue); color: #fff; }
.tip-detail .icon-lg { width: 110px; height: 110px; margin-bottom: 20px; }

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: #E8EAED; padding: 56px 0 28px; margin-top: 64px; }
.site-footer a { color: #E8EAED; }
.site-footer .grid-4 { margin-bottom: 40px; }
.site-footer h4 { color: #fff; font-size: .85rem; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 14px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.site-footer ul a { color: #BDC1C6; font-size: .92rem; }
.site-footer ul a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid #3C4043; padding-top: 24px; display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 12px; color: #9AA0A6; font-size: .82rem;
}
.footer-logo svg { height: 26px; margin-bottom: 14px; }

/* ---------- review carousel (homepage) ---------- */
.review-carousel { overflow: hidden; }
.review-track { display: flex; transition: transform .5s ease; }
.review-slide { flex: 0 0 100%; padding: 4px 4px 8px; min-height: 140px; }
.review-quote { font-size: 1.12rem; color: var(--ink); font-style: italic; margin-bottom: 10px; }
.review-theme { font-weight: 700; color: var(--blue-dark); font-size: .85rem; }
.review-dots { display: flex; gap: 8px; margin-top: 8px; }
.review-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); border: none; cursor: pointer; padding: 0; }
.review-dot.active { background: var(--blue); }

/* ---------- blog post prev/next ---------- */
.post-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  max-width: 720px; margin: 0 auto; padding: 24px 0;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.post-nav-link { display: block; color: var(--ink); }
.post-nav-link.next { text-align: right; }
.post-nav-link span { display: block; font-size: .8rem; color: var(--grey); margin-bottom: 4px; }
.post-nav-link strong { color: var(--blue-dark); }

/* ---------- blog / tips: search + time filter + list rows ---------- */
.blog-controls { display: flex; gap: 12px; margin-top: 18px; flex-wrap: wrap; }
.search-box {
  border: 1px solid var(--border); border-radius: var(--radius-s); padding: 10px 14px;
  font-family: var(--font); font-size: .92rem; flex: 1; min-width: 220px;
}
.blog-controls select {
  border: 1px solid var(--border); border-radius: var(--radius-s); padding: 10px 12px; font-family: var(--font);
}
.blog-list { display: flex; flex-direction: column; }
.blog-list-row {
  display: flex; align-items: center; gap: 16px; padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.blog-list-row .post-date { color: var(--grey); font-size: .85rem; width: 110px; flex-shrink: 0; }
.blog-list-row .blog-list-title { flex: 1; font-weight: 600; color: var(--ink); }

/* ---------- misc ---------- */
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 28px; flex-wrap: wrap; gap: 12px; }
.section-head p { color: var(--grey); margin: 0; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.breadcrumbs { font-size: .85rem; color: var(--grey); margin-bottom: 18px; }
.breadcrumbs a { color: var(--grey); }
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 32px; }
.pagination a, .pagination span {
  padding: 8px 14px; border-radius: var(--radius-s); border: 1px solid var(--border); font-size: .9rem; color: var(--ink-soft);
}
.pagination .active { background: var(--blue); color: #fff; border-color: var(--blue); }
.rating { color: var(--yellow); font-size: .85rem; }
.disclosure-banner {
  background: #FEF7E0; color: #7a5500; font-size: .85rem; padding: 10px 0; text-align: center;
}

/* ---------- contact modal ---------- */
.contact-fab {
  position: fixed; right: 24px; bottom: 24px; z-index: 60;
  background: var(--blue); color: #fff; border: none; border-radius: 999px;
  padding: 14px 22px; font-weight: 700; font-size: .92rem; cursor: pointer;
  box-shadow: var(--shadow-l);
}
.contact-fab:hover { background: var(--blue-dark); }
dialog#contact-dialog {
  border: none; border-radius: var(--radius-l); box-shadow: var(--shadow-l);
  padding: 32px; width: min(480px, 92vw); max-height: 88vh; overflow-y: auto;
}
dialog#contact-dialog::backdrop { background: rgba(32,33,36,.55); }
dialog#contact-dialog h3 { margin-top: 0; }
.modal-intro { color: var(--grey); font-size: .92rem; }
.modal-close {
  position: absolute; top: 14px; right: 16px; background: none; border: none;
  font-size: 1.6rem; line-height: 1; color: var(--grey); cursor: pointer;
}
.modal-close:hover { color: var(--ink); }
.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: .85rem; font-weight: 600; color: var(--ink-soft); margin-bottom: 6px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-s);
  font-family: var(--font); font-size: .95rem; color: var(--ink); background: #fff;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: 2px solid var(--blue); outline-offset: 1px;
}
.form-field textarea { resize: vertical; }

@media (max-width: 980px) {
  .hero .container { grid-template-columns: 1fr; }
  .catalog-layout { grid-template-columns: 1fr; }
  .filters { position: static; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .product-detail { grid-template-columns: 1fr; }
  .main-nav { display: none; }
}
@media (max-width: 560px) {
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .site-footer .grid-4 { grid-template-columns: 1fr 1fr; gap: 28px; }
  .contact-fab { right: 16px; bottom: 16px; padding: 12px 18px; font-size: .85rem; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-link.next { text-align: left; }
  .blog-controls { flex-direction: column; align-items: stretch; }
  .blog-list-row { flex-wrap: wrap; gap: 6px 16px; }
  .blog-list-row .post-date { width: auto; order: 3; }
}