/* ═══════════════════════════════════════════════════════════
   SAMEN VERDER – Stylesheet
   CBS Op Dreef & OBS De Meerpaal, Bruinisse

   Design tokens → globals → layout → components → sections
   ═══════════════════════════════════════════════════════════ */

/* ─── 1. Design Tokens ────────────────────────────────────── */
:root {
  /* Colors – primary */
  --color-blue-50:  #EEF7FC;
  --color-blue-100: #D2EAF5;
  --color-blue-200: #A4D4EA;
  --color-blue-300: #5CB5D6;
  --color-blue-500: #2797BA;   /* primary action */
  --color-blue-700: #186282;   /* hover / emphasis */

  /* Colors – accent (green, used sparingly) */
  --color-green-50:  #EAF5EE;
  --color-green-100: #C8E8D2;
  --color-green-500: #4FA064;
  --color-green-700: #347549;

  /* Colors – neutral */
  --color-neutral-0:   #FFFFFF;
  --color-neutral-50:  #F7FAFB;
  --color-neutral-100: #EFF3F5;
  --color-neutral-200: #DDE4E9;
  --color-neutral-300: #C5CDD4;
  --color-neutral-500: #6B7A84;
  --color-neutral-700: #3E4D58;
  --color-neutral-900: #1A252C;

  /* Semantic aliases */
  --color-bg:         var(--color-neutral-0);
  --color-bg-subtle:  var(--color-neutral-50);
  --color-border:     var(--color-neutral-200);
  --color-text:       var(--color-neutral-900);
  --color-text-muted: var(--color-neutral-500);

  /* Typography */
  --font-body:  'Inter', system-ui, -apple-system, sans-serif;
  --font-size:  18px;
  --line-height: 1.75;

  /* Spacing scale */
  --space-2:   4px;
  --space-4:   8px;
  --space-6:  12px;
  --space-8:  16px;
  --space-10: 20px;
  --space-12: 24px;
  --space-16: 32px;
  --space-20: 40px;
  --space-24: 48px;
  --space-32: 64px;
  --space-40: 80px;

  /* Border radius */
  --radius-sm:  8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 3px rgba(0,0,0,.06);
  --shadow-sm: 0 2px 8px rgba(0,0,0,.07), 0 1px 3px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.09), 0 2px 6px rgba(0,0,0,.05);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.10), 0 2px 8px rgba(0,0,0,.04);

  /* Layout */
  --container:      960px;
  --container-wide: 1280px;

  /* Nav height – used for scroll offset compensation */
  --nav-height: 64px;
}

/* ─── 2. Reset ────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: var(--line-height);
  -webkit-font-smoothing: antialiased;
  padding-top: var(--nav-height); /* compensate for fixed nav */
}

img {
  display: block;
  max-width: 100%;
}

ul, ol {
  list-style: none;
}

/* ─── 3. Layout ───────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-12);
}

.container--wide {
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--space-12);
}

section {
  padding-block: var(--space-40);
}

.section-intro {
  margin-bottom: var(--space-24);
}

.section-intro + * {
  /* first child after intro gets no extra top margin */
}

/* ─── 4. Typography ───────────────────────────────────────── */
h1 {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.01em;
}

h2 {
  font-size: clamp(1.3rem, 3vw, 1.65rem);
  font-weight: 700;
  line-height: 1.3;
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
}

p {
  color: var(--color-text-muted);
}

strong {
  color: var(--color-text);
  font-weight: 600;
}

a {
  color: var(--color-blue-500);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.eyebrow {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-blue-500);
  margin-bottom: var(--space-6);
}

.lead {
  font-size: 1.05rem;
  color: var(--color-neutral-700);
  line-height: 1.8;
}

/* ─── 5. Divider line ─────────────────────────────────────── */
.rule {
  width: 40px;
  height: 3px;
  background: var(--color-blue-300);
  border-radius: 2px;
  margin-top: var(--space-8);
}

/* ─── 6. Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 600;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background .15s, border-color .15s, box-shadow .15s, transform .1s;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-blue-500);
  color: var(--color-neutral-0);
  border-color: var(--color-blue-500);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background: var(--color-blue-700);
  border-color: var(--color-blue-700);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  background: transparent;
  color: var(--color-blue-500);
  border-color: var(--color-blue-200);
}

.btn--ghost:hover {
  background: var(--color-blue-50);
  border-color: var(--color-blue-300);
}

/* ─── 7. Badge / notice ───────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  font-size: .78rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full);
}

.badge--green {
  background: var(--color-green-50);
  color: var(--color-green-700);
  border: 1px solid var(--color-green-100);
}

.badge--green::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-green-500);
  flex-shrink: 0;
}

/* ─── 8. Card ─────────────────────────────────────────────── */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-12) var(--space-12);
  box-shadow: var(--shadow-xs);
}

.card--elevated {
  box-shadow: var(--shadow-sm);
}

/* ─── 9. Callout ──────────────────────────────────────────── */
.callout {
  display: flex;
  gap: var(--space-8);
  padding: var(--space-10) var(--space-12);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  line-height: 1.65;
}

.callout--blue {
  background: var(--color-blue-50);
  border-left: 3px solid var(--color-blue-300);
  color: var(--color-neutral-700);
}

.callout--green {
  background: var(--color-green-50);
  border: 1px solid var(--color-green-100);
  color: var(--color-green-700);
  border-radius: var(--radius-md);
}

.callout__icon {
  flex-shrink: 0;
  margin-top: 2px;
}

/* ─── 10. Form elements ───────────────────────────────────── */
label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  color: var(--color-neutral-700);
  margin-bottom: var(--space-2);
}

input,
select,
textarea {
  font-family: var(--font-body);
  font-size: .9rem;
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color .15s, box-shadow .15s;
  appearance: none;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-blue-300);
  box-shadow: 0 0 0 3px var(--color-blue-100);
}

textarea {
  resize: vertical;
  min-height: 110px;
}

/* ═══════════════════════════════════════════════════════════
   COMPONENTS
   ═══════════════════════════════════════════════════════════ */

/* ─── Navigation ──────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-12);
  padding-block: var(--space-8);
}

.nav__logos {
  display: flex;
  align-items: center;
  gap: var(--space-10);
}

.nav__logos img {
  height: 38px;
  width: auto;
}

.nav__sep {
  width: 1px;
  height: 30px;
  background: var(--color-border);
  flex-shrink: 0;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-16);
}

.nav__links a {
  font-size: .88rem;
  font-weight: 500;
  color: var(--color-neutral-700);
  transition: color .15s;
}

.nav__links a:hover {
  color: var(--color-blue-500);
  text-decoration: none;
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
  color: var(--color-neutral-700);
}

/* Mobile nav */
@media (max-width: 680px) {
  .nav__links {
    display: none;
  }

  .nav__links.is-open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-8) var(--space-12) var(--space-12);
    gap: var(--space-8);
    box-shadow: var(--shadow-md);
  }

  .nav__toggle {
    display: flex;
  }
}

/* ═══════════════════════════════════════════════════════════
   SECTIONS
   ═══════════════════════════════════════════════════════════ */

/* ─── Hero ────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(160deg, var(--color-blue-50) 0%, var(--color-neutral-0) 60%);
  padding-block: 80px 72px;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-32);
  align-items: center;
}

.hero .badge {
  margin-bottom: var(--space-10);
}

.hero h1 {
  margin-bottom: var(--space-8);
}

.hero h1 em {
  font-style: normal;
  color: var(--color-blue-500);
}

.hero__intro {
  margin-bottom: var(--space-20);
}

.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__visual svg {
  width: 100%;
  max-width: 460px;
  height: auto;
}

/* ─── Video ───────────────────────────────────────────────── */
.video-section {
  background: var(--color-bg-subtle);
}

.video-section .section-intro {
  text-align: center;
}

.video-section .rule {
  margin-inline: auto;
}

.video-section .lead {
  max-width: 500px;
  margin-inline: auto;
  margin-top: var(--space-6);
}

.video-frame {
  position: relative;
  max-width: 680px;
  margin-inline: auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--color-neutral-900);
  aspect-ratio: 16 / 9;
}

.video-frame iframe,
.video-frame video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-frame__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  color: rgba(255,255,255,.5);
  font-size: .88rem;
}

.video-frame__placeholder svg {
  width: 52px;
  height: 52px;
}

/* ─── Explanation ─────────────────────────────────────────── */
.explanation__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-20);
  align-items: start;
  margin-top: var(--space-20);
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.check-list li {
  display: flex;
  gap: var(--space-6);
  align-items: flex-start;
  font-size: .93rem;
  color: var(--color-neutral-700);
}

.check-list__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-blue-100);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 3px;
}

.check-list__icon svg {
  width: 10px;
  height: 10px;
  color: var(--color-blue-500);
}

.callout-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

/* ─── Why cards ───────────────────────────────────────────── */
.card-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-20);
}

.why-card .card-icon {
  font-size: 1.4rem;
  margin-bottom: var(--space-8);
  width: 48px;
  height: 48px;
  background: var(--color-blue-50);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.why-card h3 {
  margin-bottom: var(--space-4);
}

.why-card p {
  font-size: .88rem;
}

/* ─── Possibilities ───────────────────────────────────────── */
.poss-notice {
  margin-bottom: var(--space-20);
}

.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.poss-tag {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  background: var(--color-green-50);
  color: var(--color-green-700);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}

.poss-card h3 {
  margin-bottom: var(--space-2);
}

.poss-card p {
  font-size: .88rem;
}

/* ─── Timeline ────────────────────────────────────────────── */
.timeline-section {
  background: var(--color-bg-subtle);
}

.timeline {
  position: relative;
  margin-top: var(--space-24);
  padding-left: 56px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 21px;
  top: 20px;
  bottom: 20px;
  width: 2px;
  background: var(--color-border);
}

.timeline__step {
  position: relative;
  padding-bottom: var(--space-20);
}

.timeline__step:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: -44px;
  top: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  font-weight: 700;
  border: 3px solid var(--color-bg);
  box-shadow: var(--shadow-xs);
}

.timeline__step--active .timeline__dot {
  background: var(--color-blue-500);
  color: var(--color-neutral-0);
}

.timeline__step--upcoming .timeline__dot {
  background: var(--color-neutral-200);
  color: var(--color-neutral-500);
}

.timeline__period {
  display: block;
  font-size: .75rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.timeline__step--active .timeline__period {
  color: var(--color-blue-500);
}

.timeline__step--upcoming .timeline__period {
  color: var(--color-neutral-500);
}

.timeline__step h3 {
  margin-bottom: var(--space-2);
}

.timeline__step p {
  font-size: .9rem;
}

/* ─── Impact / reassurance ────────────────────────────────── */
.impact-card {
  text-align: center;
  padding: var(--space-20);
}

.impact-card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-10);
  display: block;
}

.impact-card h3 {
  margin-bottom: var(--space-4);
}

.impact-card p {
  font-size: .9rem;
}

/* ─── FAQ ─────────────────────────────────────────────────── */
.faq-section {
  background: var(--color-bg-subtle);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-20);
}

details {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .2s;
}

details[open] {
  border-color: var(--color-blue-200);
}

summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  padding: var(--space-10) var(--space-12);
  font-size: .93rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: background .15s;
  line-height: 1.4;
}

summary::-webkit-details-marker {
  display: none;
}

summary:hover {
  background: var(--color-blue-50);
}

.summary__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-blue-50);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s, transform .2s;
}

.summary__icon svg {
  width: 12px;
  height: 12px;
  color: var(--color-blue-500);
  transition: transform .2s;
}

details[open] .summary__icon {
  background: var(--color-blue-100);
}

details[open] .summary__icon svg {
  transform: rotate(45deg);
}

.faq__answer {
  padding: 0 var(--space-12) var(--space-10);
  font-size: .9rem;
  color: var(--color-neutral-700);
  line-height: 1.75;
}

.faq__cta {
  text-align: center;
  margin-top: var(--space-16);
}

/* ─── Contact ─────────────────────────────────────────────── */
.contact__box {
  max-width: 620px;
  margin-inline: auto;
  background: var(--color-blue-50);
  border: 1px solid var(--color-blue-100);
  border-radius: var(--radius-xl);
  padding: var(--space-32) var(--space-24);
  text-align: center;
}

.contact__box h2 {
  margin-bottom: var(--space-4);
}

.contact__box > p {
  margin-bottom: var(--space-20);
}

.contact__form {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.contact__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.contact__field {
  display: flex;
  flex-direction: column;
}

.contact__submit {
  display: flex;
  justify-content: center;
  margin-top: var(--space-4);
}

.contact__privacy {
  font-size: .78rem;
  color: var(--color-neutral-500);
  text-align: center;
  margin-top: var(--space-8);
}

/* ─── Footer ──────────────────────────────────────────────── */
.footer {
  background: var(--color-neutral-100);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-20);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-12);
}

.footer__logos {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.footer__logos img {
  height: 38px;
  width: auto;
}

.footer__text {
  font-size: .82rem;
  color: var(--color-neutral-500);
  text-align: center;
  line-height: 1.6;
}

.footer__links {
  display: flex;
  gap: var(--space-12);
}

.footer__links a {
  font-size: .82rem;
  color: var(--color-neutral-500);
}

.footer__links a:hover {
  color: var(--color-blue-500);
}

/* ─── Scroll offset for fixed nav ────────────────────────── */
/* Prevents the nav bar from covering section headings on anchor jump */
section[id] {
  scroll-margin-top: var(--nav-height);
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 860px) {
  .card-grid-3 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  section {
    padding-block: var(--space-32);
  }

  .hero {
    padding-block: var(--space-32);
  }

  .hero__grid {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    display: none;
  }

  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

  .explanation__grid {
    grid-template-columns: 1fr;
  }

  .card-grid-3 {
    grid-template-columns: 1fr;
  }

  .card-grid-2 {
    grid-template-columns: 1fr;
  }

  .contact__row {
    grid-template-columns: 1fr;
  }

  .contact__box {
    padding: var(--space-20) var(--space-12);
    border-radius: var(--radius-lg);
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .footer__logos {
    justify-content: center;
  }

  .footer__links {
    justify-content: center;
  }
}