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

:root {
  --blue:       #0078D4;
  --blue-dark:  #005A9E;
  --blue-light: #EEF4FB;
  --red:        #C82613;
  --gray-50:    #F5F5F5;
  --gray-100:   #EBEBEB;
  --gray-200:   #DDDDDD;
  --gray-400:   #999999;
  --gray-600:   #555555;
  --gray-900:   #1A1A1A;
  --white:      #FFFFFF;
  --radius:     8px;
  --radius-sm:  4px;
  --shadow:     0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg:  0 4px 20px rgba(0,0,0,0.12);
  --font:       'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
  font-family: var(--font);
  font-size: 14px;
  color: var(--gray-900);
  background: var(--gray-50);
  min-height: 100vh;
}

/* ── SCHERMEN ── */
.screen { min-height: 100vh; }

/* ── LOGIN ── */
#screen-login {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-50);
}
.login-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 48px 40px;
  max-width: 400px;
  width: 100%;
  text-align: center;
}
.login-logo { width: 160px; margin-bottom: 24px; }
.login-card h1 { font-size: 22px; font-weight: 600; margin-bottom: 10px; color: var(--gray-900); }
.login-card p { color: var(--gray-600); font-size: 14px; margin-bottom: 28px; line-height: 1.5; }
.error-msg { color: var(--red); font-size: 13px; margin-top: 12px; }

/* ── HEADER ── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 32px;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-logo { height: 32px; }
.header-user { display: flex; align-items: center; gap: 16px; font-size: 14px; color: var(--gray-600); }

/* ── MAIN LAYOUT ── */
.app-main {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 20px;
  padding: 24px 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.col {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.col-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-900);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--gray-100);
}

/* ── SETTINGS ── */
.setting-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Toggle */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.toggle-label { font-size: 14px; color: var(--gray-900); cursor: pointer; }

.toggle-switch { position: relative; display: inline-block; width: 44px; height: 24px; flex-shrink: 0; cursor: pointer; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-track {
  position: absolute; inset: 0;
  background: var(--gray-200);
  border-radius: 24px;
  transition: background 0.2s;
}
.toggle-track::after {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  left: 3px; top: 3px;
  background: var(--white);
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.toggle-switch input:checked + .toggle-track { background: var(--blue); }
.toggle-switch input:checked + .toggle-track::after { transform: translateX(20px); }

/* Dagknoppen */
.dagen-grid {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.dag-btn {
  width: 52px;
  height: 36px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  background: var(--gray-100);
  color: var(--gray-600);
  transition: background 0.15s, color 0.15s;
}
.dag-btn.active {
  background: var(--blue);
  color: var(--white);
}
.dag-btn:hover:not(.active) { background: var(--gray-200); }

/* Data info */
.data-info {
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-top: 4px;
}
.data-row {
  display: flex;
  padding: 8px 12px;
  font-size: 13px;
  gap: 12px;
}
.data-row:nth-child(odd) { background: var(--gray-50); }
.data-label { color: var(--gray-400); width: 70px; flex-shrink: 0; }
.data-value { color: var(--gray-900); font-weight: 500; }

/* ── RECHTER KOLOM ── */
.preview-box {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 20px;
  min-height: 200px;
  background: var(--white);
}

.feedback {
  background: #E6F4EA;
  color: #1B7E2E;
  border: 1px solid #A8D5B0;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 500;
}

.instructie-box {
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 16px;
  background: var(--gray-50);
}
.instructie-titel {
  font-weight: 600;
  font-size: 13px;
  margin-bottom: 10px;
  color: var(--gray-900);
}
.instructie-lijst {
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.instructie-lijst li { font-size: 13px; color: var(--gray-600); line-height: 1.5; }
.instructie-lijst strong { color: var(--gray-900); }

/* ── KNOPPEN ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 6px;
  font-family: var(--font);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost { background: transparent; color: var(--gray-600); border: 1px solid var(--gray-200); }
.btn-ghost:hover { background: var(--gray-50); }
.btn-large { font-size: 15px; padding: 12px 24px; }
.btn-small { font-size: 13px; padding: 6px 12px; }
.btn-full { width: 100%; font-size: 14px; padding: 12px; }

/* ── LOADING ── */
#screen-loading {
  display: flex;
  align-items: center;
  justify-content: center;
}
.loader-wrap { text-align: center; color: var(--gray-400); }
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── RESPONSIVE ── */
@media (max-width: 800px) {
  .app-main { grid-template-columns: 1fr; padding: 16px; }
  .login-card { padding: 32px 24px; margin: 16px; }
}

/* Mobiel invulveld */
.mobiel-input-row {
  display: flex;
  align-items: center;
  padding-top: 6px;
}
.mobiel-input {
  width: 100%;
  padding: 7px 10px;
  font-size: 14px;
  font-family: var(--font);
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  color: var(--gray-900);
  background: var(--white);
  outline: none;
}
.mobiel-input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 2px rgba(0,120,212,0.15);
}
.mobiel-input::placeholder {
  color: var(--gray-400);
}