/* ==========================================================================
   De Hoeksteen — gedeelde stylesheet
   ========================================================================== */

:root {
  --color-accent: #32bdf0;
  --color-accent-dark: #109bd0;
  --color-text: #212529;
  --color-text-light: #5a6169;
  --color-bg: #ffffff;
  --color-bg-alt: #eef3f6;
  --color-bg-dark: #23272b;
  --color-border: #e3e8ec;
  --font-main: "Lato", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html, body {
  overflow-x: hidden;
  width: 100%;
}

body {
  margin: 0;
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 17px;
}

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

a {
  color: var(--color-accent-dark);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent);
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(6px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 20px;
  color: var(--color-text);
}

.site-logo img {
  height: 46px;
  width: 46px;
}

.site-logo .logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.site-logo .logo-text small {
  font-weight: 400;
  font-size: 12px;
  color: var(--color-text-light);
  letter-spacing: 0.03em;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-list > li {
  position: relative;
}

.nav-list > li > a {
  display: block;
  padding: 10px 2px;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
}

.nav-list > li > a:hover,
.nav-list > li.active > a {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent);
}

.nav-list .submenu {
  list-style: none;
  margin: 0;
  padding: 10px 0;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 210px;
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  border-radius: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: all 0.18s ease;
}

.nav-list > li:hover .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-list .submenu a {
  display: block;
  padding: 9px 18px;
  font-size: 13.5px;
  font-weight: 400;
  text-transform: none;
  letter-spacing: normal;
  color: var(--color-text);
}

.nav-list .submenu a:hover {
  background: var(--color-bg-alt);
  color: var(--color-accent-dark);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: 0.2s;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background: linear-gradient(120deg, #1c8fbf 0%, #32bdf0 60%, #6fd4f6 100%);
  color: #fff;
  overflow: hidden;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 90px 24px;
  position: relative;
  z-index: 2;
}

.hero h1 {
  color: #fff;
  font-size: 42px;
  margin: 0 0 14px;
}

.hero p.tagline {
  font-size: 19px;
  margin: 0;
  color: rgba(255, 255, 255, 0.92);
  max-width: 560px;
}

.hero-cross {
  position: absolute;
  right: -40px;
  top: -60px;
  width: 320px;
  height: 320px;
  opacity: 0.15;
}

.hero.hero-small .hero-inner {
  padding: 56px 24px;
}

.hero.hero-small h1 {
  font-size: 32px;
}

/* ---------- Announcement bar ---------- */

.announcement {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

.announcement .container {
  padding-top: 22px;
  padding-bottom: 22px;
  text-align: center;
  color: var(--color-accent-dark);
  font-weight: 700;
  font-size: 14.5px;
  letter-spacing: 0.02em;
}

.announcement p {
  margin: 4px 0;
}

/* ---------- Sections ---------- */

.section {
  padding: 64px 0;
}

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

.section-title {
  text-align: center;
  font-size: 30px;
  margin: 0 0 12px;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-light);
  max-width: 640px;
  margin: 0 auto 44px;
  font-size: 16px;
}

.divider {
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  margin: 0 auto 40px;
  border-radius: 2px;
}

/* ---------- Cards / grid ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 32px 26px;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 30px rgba(30, 40, 50, 0.08);
}

.card .icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(50, 189, 240, 0.12);
  color: var(--color-accent-dark);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 19px;
}

.card p {
  color: var(--color-text-light);
  font-size: 15px;
  margin: 0;
}

/* ---------- Info / service box ---------- */

.info-box {
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  border-radius: 6px;
  padding: 28px 32px;
  margin: 32px 0;
}

.info-box h3 {
  margin-top: 0;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 13px 30px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}

.btn:hover {
  background: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
}

.btn.btn-outline {
  background: transparent;
  border: 2px solid #fff;
  color: #fff;
}

.btn.btn-outline:hover {
  background: #fff;
  color: var(--color-accent-dark);
}

/* ---------- Article / content pages ---------- */

.article {
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}

.article h1 {
  font-size: 34px;
  margin-bottom: 26px;
}

.article h2 {
  font-size: 23px;
  margin: 40px 0 14px;
}

.article p {
  margin: 0 0 18px;
  color: #363c41;
}

.article blockquote {
  margin: 30px 0;
  padding: 20px 26px;
  border-left: 4px solid var(--color-accent);
  background: var(--color-bg-alt);
  font-style: italic;
  color: var(--color-text-light);
}

/* ---------- Agenda ---------- */

.agenda-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.agenda-item {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 22px 26px;
}

.agenda-date {
  flex: 0 0 auto;
  background: var(--color-accent);
  color: #fff;
  border-radius: 6px;
  width: 68px;
  text-align: center;
  padding: 10px 0;
  font-weight: 700;
}

.agenda-date .day {
  font-size: 22px;
  line-height: 1;
}

.agenda-date .month {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.agenda-item h3 {
  margin: 0 0 6px;
  font-size: 18px;
}

.agenda-item p {
  margin: 0;
  color: var(--color-text-light);
  font-size: 15px;
}

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: start;
}

.contact-info h3 {
  margin-top: 28px;
}

.contact-info h3:first-child {
  margin-top: 0;
}

.contact-info p {
  color: var(--color-text-light);
  margin: 4px 0 0;
}

form.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-form label {
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 6px;
  display: block;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 5px;
  font-family: var(--font-main);
  font-size: 15px;
}

.contact-form textarea {
  min-height: 130px;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(50, 189, 240, 0.15);
}

.map-embed {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-top: 30px;
}

.map-embed iframe {
  width: 100%;
  height: 320px;
  border: 0;
  display: block;
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--color-bg-dark);
  color: #c7cdd3;
  padding: 50px 0 26px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 30px;
}

.footer-grid h4 {
  color: #fff;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 16px;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-grid li {
  margin-bottom: 9px;
}

.footer-grid a {
  color: #c7cdd3;
}

.footer-grid a:hover {
  color: var(--color-accent);
}

.footer-grid p {
  margin: 0 0 8px;
  color: #a7aeb5;
  font-size: 14.5px;
}

.footer-bottom {
  border-top: 1px solid #33383d;
  padding-top: 22px;
  text-align: center;
  font-size: 13.5px;
  color: #8f979e;
}

.social-links {
  display: flex;
  gap: 12px;
  margin-top: 6px;
}

.social-links a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #33383d;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.social-links a:hover {
  background: var(--color-accent);
}

/* ---------- Back to top ---------- */

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 200;
  font-size: 18px;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- Responsive ---------- */

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

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

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

@media (max-width: 960px) {
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    height: calc(100vh - 76px);
    background: #fff;
    transform: translateX(100%);
    transition: transform 0.25s ease;
    overflow-y: auto;
    padding: 20px 0;
  }

  .main-nav.open {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0 24px;
  }

  .nav-list > li > a {
    padding: 16px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-list .submenu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    display: none;
    padding: 0 0 10px 16px;
  }

  .nav-list > li.open .submenu {
    display: block;
  }

  .hero h1 {
    font-size: 30px;
  }

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

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