/* ═══════════════════════════════════════════════════════════
   style.css — Omtrek Calculator
   ═══════════════════════════════════════════════════════════ */

/* ── Design tokens ─────────────────────────────────────────── */
:root {
  --bg:      #0e0f14;
  --surface: #16181f;
  --surface2:#1e2029;
  --border:  #2a2d3a;
  --accent:  #7c6aff;
  --accent2: #ff6b6b;
  --accent3: #43e97b;
  --text:    #e8e9f0;
  --muted:   #7a7d8e;
  --radius:  14px;
}

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

/* ── Body & achtergrond ─────────────────────────────────────── */
body {
  font-family: 'Syne', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 0;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 20%, rgba(124,106,255,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(67,233,123,0.05) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* ── Navigatiebalk ──────────────────────────────────────────── */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14,15,20,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 56px;
}

/* ── Globale link reset ──────────────────────────────────────── */
a {
  color: inherit;
  text-decoration: none;
}

/* Gedeelde link-stijl: gebruikt door nav, over-zijmenu en footer.
   Identiek aan .nav-btn / .nav-btn.active in de sidebar. */
a.site-link, .site-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 10px;
  text-decoration: none;
  font-family: 'Syne', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
  border: 1px solid transparent;
  cursor: pointer;
}

a.site-link:hover, .site-link:hover {
  background: var(--surface2);
  color: var(--text);
  text-decoration: none;
}

a.site-link.active, .site-link.active {
  background: rgba(124,106,255,0.15);
  color: #c4bcff;
  border-color: rgba(124,106,255,0.25);
  text-decoration: none;
}

a.site-link .link-icon, .site-link .link-icon { font-size: 1rem; flex-shrink: 0; }

/* Nav-balk container: de twee links naast elkaar, gecentreerd */
.nav-links-row {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ── "Op deze pagina"-menu in rechterzijbalk (verticaal) ──── */
.over-nav-links {
  list-style: none;
  padding: 6px 8px 8px;
}

.over-nav-links li a { width: 100%; text-decoration: none; }

/* ── Footer nav (over-pagina) ───────────────────────────────── */
.main-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.footer-tagline {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

/* ── Wrapper & layout ───────────────────────────────────────── */
.wrapper {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 720px) {
  .layout { grid-template-columns: 1fr; }
}

/* ── Header ─────────────────────────────────────────────────── */
header {
  text-align: center;
  padding: 3rem 0 2.5rem;
}

header .badge {
  display: inline-block;
  background: rgba(124,106,255,0.15);
  border: 1px solid rgba(124,106,255,0.3);
  color: #a89bff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  background: linear-gradient(135deg, #fff 30%, #7c6aff 70%, #43e97b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header p {
  color: var(--muted);
  margin-top: 0.75rem;
  font-size: 1rem;
  font-family: 'DM Mono', monospace;
}

/* ── Sidebar / accordion ────────────────────────────────────── */
.sidebar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  position: sticky;
  top: 1.5rem;
}

.accordion-group {
  border-bottom: 1px solid var(--border);
}

.accordion-group:last-child {
  border-bottom: none;
}

.accordion-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 11px 14px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: 'Syne', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  transition: background 0.15s, color 0.15s;
  text-align: left;
}

.accordion-toggle:hover {
  background: var(--surface2);
  color: var(--text);
}

.accordion-toggle.open {
  color: var(--text);
  background: var(--surface2);
}

.accordion-toggle.has-active {
  color: #c4bcff;
}

.accordion-arrow {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
  opacity: 0.5;
}

.accordion-toggle.open .accordion-arrow {
  transform: rotate(180deg);
  opacity: 1;
}

.accordion-items {
  display: none;
  padding: 4px 8px 8px;
}

.accordion-items.open {
  display: block;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 9px 12px;
  background: transparent;
  border: none;
  border-radius: 10px;
  color: var(--muted);
  font-family: 'Syne', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s ease;
}

.nav-btn:hover {
  background: var(--surface2);
  color: var(--text);
}

.nav-btn.active {
  background: rgba(124,106,255,0.15);
  color: #c4bcff;
  border: 1px solid rgba(124,106,255,0.25);
}

.nav-btn .icon { font-size: 1rem; flex-shrink: 0; }

/* ── Hoofdkaart ─────────────────────────────────────────────── */
.main-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.card-header {
  padding: 1.5rem 1.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-header .big-icon {
  font-size: 2rem;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface2);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.card-header h2 {
  font-size: 1.3rem;
  font-weight: 700;
}

.card-header p {
  color: var(--muted);
  font-size: 0.82rem;
  font-family: 'DM Mono', monospace;
  margin-top: 2px;
}

.card-body {
  padding: 1.75rem;
}

/* ── Formulier ──────────────────────────────────────────────── */
.fields-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

input[type="number"],
input[type="text"],
select {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 0.95rem;
  width: 100%;
  outline: none;
  transition: border-color 0.2s;
  -moz-appearance: textfield;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button { -webkit-appearance: none; }

input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124,106,255,0.12);
}

select option { background: #1e2029; }

.eenheid-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.eenheid-row label {
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eenheid-options {
  display: flex;
  gap: 6px;
}

.eenheid-options label {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.78rem;
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted);
  transition: all 0.15s;
}

.eenheid-options input[type="radio"] { display: none; }

.eenheid-options label:has(input:checked) {
  background: rgba(124,106,255,0.15);
  border-color: rgba(124,106,255,0.4);
  color: #c4bcff;
}

.submit-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: linear-gradient(135deg, var(--accent), #9b8cff);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-family: 'Syne', sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  letter-spacing: 0.02em;
}

.submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(124,106,255,0.35);
}

.submit-btn:active { transform: translateY(0); }

/* ── Resultaat ──────────────────────────────────────────────── */
@keyframes slideIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-card {
  margin-top: 1.5rem;
  background: linear-gradient(135deg, rgba(67,233,123,0.06), rgba(124,106,255,0.06));
  border: 1px solid rgba(67,233,123,0.2);
  border-radius: var(--radius);
  padding: 1.5rem;
  animation: slideIn 0.3s ease;
}

.result-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent3);
  margin-bottom: 0.5rem;
}

.result-number {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  font-family: 'DM Mono', monospace;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1;
}

.result-number span {
  font-size: 0.4em;
  color: var(--accent3);
  font-weight: 700;
  margin-left: 4px;
  vertical-align: middle;
}

.result-extra {
  margin-top: 0.6rem;
  font-size: 0.82rem;
  color: #a0f0c0;
  font-family: 'DM Mono', monospace;
}

.result-uitleg {
  margin-top: 1rem;
  padding: 1rem;
  background: rgba(0,0,0,0.3);
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.05);
}

.result-uitleg-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.result-uitleg pre {
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  color: #9d9db5;
  white-space: pre-wrap;
  line-height: 1.7;
}

.error-card {
  margin-top: 1.5rem;
  background: rgba(255,107,107,0.08);
  border: 1px solid rgba(255,107,107,0.25);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  color: #ffaaaa;
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
  animation: slideIn 0.3s ease;
}

/* ── Diversen ───────────────────────────────────────────────── */
.form-note {
  font-size: 0.78rem;
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 1.25rem 0;
}

.formula-chip {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(124,106,255,0.1);
  border: 1px solid rgba(124,106,255,0.2);
  border-radius: 6px;
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: #a89bff;
  margin-top: 0.3rem;
}

/* ── AdSense placeholders ───────────────────────────────────── */
.ad-label {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 4px;
  text-align: center;
}

.ad-horizontal {
  margin: 1.25rem 0;
  padding: 8px;
  min-height: 90px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.75rem;
  font-family: 'DM Mono', monospace;
}

.ad-sidebar {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 160px;
  min-height: 600px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-family: 'DM Mono', monospace;
  text-align: center;
}


.ad-sidebar-left  { left: 8px; }
.ad-sidebar-right { right: 8px; }

@media (max-width: 1300px) {
  .ad-sidebar { display: none; }
}

/* ── Over-pagina ────────────────────────────────────────────── */
.over-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 1.5rem;
  align-items: start;
  padding-bottom: 5rem;
}

@media (max-width: 860px) {
  .over-layout { grid-template-columns: 1fr; }
  .over-sidebar-col { display: none; }
}

/* Hoofdkolom: stapel van cards */
.over-main-col {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Intro-kaart */
.over-intro {
  background: linear-gradient(135deg, rgba(124,106,255,0.07), rgba(67,233,123,0.04));
  border: 1px solid rgba(124,106,255,0.22);
  border-radius: var(--radius);
  padding: 2rem 2rem;
}

.over-intro p {
  font-size: 1rem;
  color: var(--text);
  line-height: 1.9;
  margin: 0;
}

/* Sectie-cards */
.over-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.over-card-header {
  padding: 1.4rem 1.75rem 1.2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 14px;
}

.over-card-icon {
  font-size: 1.9rem;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface2);
  border-radius: 12px;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.over-card-header h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  margin: 0 0 2px;
}

.over-card-header .over-card-sub {
  color: var(--muted);
  font-size: 0.8rem;
  font-family: 'DM Mono', monospace;
}

.over-card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.over-card-body p {
  font-size: 0.93rem;
  color: var(--muted);
  line-height: 1.85;
  margin: 0;
}

/* Lijstitems als rijen met icoon + tekst naast elkaar */
.over-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.over-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 11px 16px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
}

.over-list li .li-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
  margin-top: 1px;
}

.over-list li .li-text {
  flex: 1;
}

.over-list li strong {
  color: var(--text);
  font-weight: 700;
  margin-right: 4px;
}

.li-mono {
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  color: #a89bff;
  background: rgba(124,106,255,0.1);
  border: 1px solid rgba(124,106,255,0.2);
  border-radius: 5px;
  padding: 1px 7px;
  white-space: nowrap;
}

/* Rechterkolom: snel naar */
.over-sidebar-col {
  position: sticky;
  top: calc(54px + 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.over-nav-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.over-nav-card-label {
  padding: 11px 14px 9px;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

.over-nav-links {
  list-style: none;
  padding: 6px 8px 8px;
}

.over-nav-links li a {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 9px 12px;
  border-radius: 10px;
  text-decoration: none;
  font-family: 'Syne', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  transition: background 0.15s, color 0.15s;
}

.over-nav-links li a:hover {
  background: var(--surface2);
  color: var(--text);
}

.over-nav-links li a .nav-btn-icon {
  font-size: 1rem;
  flex-shrink: 0;
}

/* CTA */
.over-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 20px;
  background: linear-gradient(135deg, var(--accent), #9b8cff);
  color: #fff;
  border-radius: 12px;
  text-decoration: none;
  font-family: 'Syne', sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: transform 0.15s, box-shadow 0.15s;
}

.over-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(124,106,255,0.4);
}