:root {
    --kleur-achtergrond: #f4f7fb;
    --kleur-sidebar: #0f172a;
    --kleur-sidebar-hover: #1e293b;
    --kleur-sidebar-actief: #2563eb;

    --kleur-primair: #2563eb;
    --kleur-primair-hover: #1d4ed8;

    --kleur-tekst: #172033;
    --kleur-tekst-zacht: #667085;
    --kleur-rand: #e5e9f0;
    --kleur-wit: #ffffff;

    --schaduw-kaart: 0 10px 30px rgba(15, 23, 42, 0.07);

    --sidebar-breedte: 250px;
    --topbar-hoogte: 88px;
    --afronding: 14px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    min-height: 100%;
    margin: 0;

    font-family:
        Inter,
        Arial,
        Helvetica,
        sans-serif;

    background: var(--kleur-achtergrond);
    color: var(--kleur-tekst);
}

a {
    color: inherit;
}

button,
input,
select,
textarea {
    font: inherit;
}

.app-layout {
    min-height: 100vh;
}

/* Sidebar */

.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 30;

    width: var(--sidebar-breedte);
    min-height: 100vh;

    display: flex;
    flex-direction: column;

    padding: 26px 18px;

    background: var(--kleur-sidebar);
    color: var(--kleur-wit);

    transition: transform 0.25s ease;
}

.sidebar-logo {
    padding: 0 10px 28px;
}

.sidebar-logo a {
    display: flex;
    align-items: center;
    gap: 12px;

    color: white;
    text-decoration: none;
}

.logo-beeldmerk {
    width: 42px;
    height: 42px;

    display: inline-flex;
    align-items: center;
    justify-content: center;

    border-radius: 12px;

    background: linear-gradient(
        135deg,
        #2563eb,
        #60a5fa
    );

    font-size: 22px;
    font-weight: 800;
}

.logo-tekst {
    font-size: 25px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.menu-link {
    display: flex;
    align-items: center;
    gap: 13px;

    min-height: 48px;
    padding: 12px 14px;

    border-radius: 11px;

    color: #cbd5e1;
    text-decoration: none;

    transition:
        background 0.2s ease,
        color 0.2s ease;
}

.menu-link:hover {
    background: var(--kleur-sidebar-hover);
    color: white;
}

.menu-link.actief {
    background: var(--kleur-sidebar-actief);
    color: white;
    font-weight: 700;
}

.menu-link-uitgeschakeld {
    opacity: 0.45;
    cursor: not-allowed;
}

.menu-link-uitgeschakeld:hover {
    background: transparent;
    color: #cbd5e1;
}

.menu-icoon {
    width: 24px;

    text-align: center;
    font-size: 18px;
}

.sidebar-onderkant {
    margin-top: auto;
    padding: 20px 10px 0;

    border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.sidebar-status {
    display: flex;
    align-items: center;
    gap: 9px;

    color: #cbd5e1;
    font-size: 14px;
}

.status-punt {
    width: 9px;
    height: 9px;

    border-radius: 50%;

    background: #22c55e;

    box-shadow:
        0 0 0 4px rgba(34, 197, 94, 0.13);
}

.sidebar-versie {
    margin-top: 9px;

    color: #64748b;
    font-size: 12px;
}

/* Hoofdgebied */

.hoofdgebied {
    min-height: 100vh;
    margin-left: var(--sidebar-breedte);
}

/* Topbar */

.topbar {
    position: sticky;
    top: 0;
    z-index: 20;

    min-height: var(--topbar-hoogte);

    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;

    padding: 18px 32px;

    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid var(--kleur-rand);

    backdrop-filter: blur(12px);
}

.topbar-links {
    display: flex;
    align-items: center;
    gap: 16px;
}

.topbar-label {
    margin: 0 0 3px;

    color: var(--kleur-tekst-zacht);

    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
}

.topbar-titel {
    margin: 0;

    font-size: 25px;
    letter-spacing: -0.5px;
}

.topbar-rechts {
    display: flex;
    align-items: center;
    gap: 22px;
}

.topbar-actie {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    min-height: 43px;
    padding: 10px 16px;

    border-radius: 10px;

    background: var(--kleur-primair);
    color: white;

    font-weight: 700;
    text-decoration: none;

    transition:
        background 0.2s ease,
        transform 0.2s ease;
}

.topbar-actie:hover {
    background: var(--kleur-primair-hover);
    transform: translateY(-1px);
}

.gebruiker {
    display: flex;
    align-items: center;
    gap: 11px;
}

.gebruiker-avatar {
    width: 42px;
    height: 42px;

    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 50%;

    background: #e8efff;
    color: var(--kleur-primair);

    font-weight: 800;
}

.gebruiker-tekst {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.gebruiker-tekst strong {
    font-size: 14px;
}

.gebruiker-tekst span {
    color: var(--kleur-tekst-zacht);
    font-size: 12px;
}

.mobiel-menu-knop {
    display: none;

    width: 42px;
    height: 42px;

    border: 1px solid var(--kleur-rand);
    border-radius: 9px;

    background: white;
    color: var(--kleur-tekst);

    cursor: pointer;
}

/* Pagina */

.pagina-inhoud {
    width: 100%;
    max-width: 1450px;

    margin: 0 auto;
    padding: 32px;
}

.pagina-intro {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 25px;

    margin-bottom: 28px;
}

.pagina-intro h2 {
    margin: 0 0 7px;

    font-size: 28px;
    letter-spacing: -0.6px;
}

.pagina-intro p {
    margin: 0;

    color: var(--kleur-tekst-zacht);
    line-height: 1.6;
}

/* Algemene kaarten en knoppen */

.kaart {
    background: var(--kleur-wit);

    border: 1px solid var(--kleur-rand);
    border-radius: var(--afronding);

    box-shadow: var(--schaduw-kaart);
}

.knop {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;

    min-height: 44px;
    padding: 11px 17px;

    border: 0;
    border-radius: 10px;

    background: var(--kleur-primair);
    color: white;

    font-weight: 700;
    text-decoration: none;

    cursor: pointer;

    transition:
        background 0.2s ease,
        transform 0.2s ease;
}

.knop:hover {
    background: var(--kleur-primair-hover);
    transform: translateY(-1px);
}

.knop-secundair {
    background: white;
    color: var(--kleur-tekst);

    border: 1px solid var(--kleur-rand);
}

.knop-secundair:hover {
    background: #f8fafc;
}

/* Formulieren */

.formulier-kaart {
    padding: 28px;
}

.formulier-grid {
    display: grid;
    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 20px;
}

.formulier-groep {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.formulier-groep-volledig {
    grid-column: 1 / -1;
}

.formulier-groep label {
    font-size: 14px;
    font-weight: 700;
}

.formulier-groep input,
.formulier-groep select,
.formulier-groep textarea {
    width: 100%;

    padding: 12px 14px;

    border: 1px solid #d7dde6;
    border-radius: 10px;

    background: white;
    color: var(--kleur-tekst);

    outline: none;

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.formulier-groep textarea {
    min-height: 120px;
    resize: vertical;
}

.formulier-groep input:focus,
.formulier-groep select:focus,
.formulier-groep textarea:focus {
    border-color: var(--kleur-primair);

    box-shadow:
        0 0 0 4px rgba(37, 99, 235, 0.10);
}

/* Tabellen */

.tabel-kaart {
    overflow-x: auto;
}

.tabel {
    width: 100%;
    border-collapse: collapse;
}

.tabel th,
.tabel td {
    padding: 16px 18px;

    border-bottom: 1px solid var(--kleur-rand);

    text-align: left;
}

.tabel th {
    background: #f8fafc;
    color: var(--kleur-tekst-zacht);

    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.7px;
}

.tabel tbody tr {
    transition: background 0.2s ease;
}

.tabel tbody tr:hover {
    background: #f7faff;
}

.tabel tbody tr:last-child td {
    border-bottom: 0;
}

.kenteken {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    min-width: 92px;
    padding: 7px 11px;

    border: 2px solid #111827;
    border-radius: 5px;

    background: #facc15;
    color: #111827;

    font-weight: 900;
    letter-spacing: 0.8px;
}

/* Meldingen */

.melding {
    padding: 15px 17px;
    margin-bottom: 20px;

    border-radius: 10px;
}

.melding-fout {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #b42318;
}

.melding-succes {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
}

/* Responsive */

@media (max-width: 900px) {
    .sidebar {
        transform: translateX(-100%);
    }

    body.menu-open .sidebar {
        transform: translateX(0);
    }

    .hoofdgebied {
        margin-left: 0;
    }

    .mobiel-menu-knop {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .gebruiker-tekst {
        display: none;
    }
}

@media (max-width: 700px) {
    .topbar {
        padding: 15px 18px;
    }

    .topbar-actie {
        display: none;
    }

    .pagina-inhoud {
        padding: 22px 16px;
    }

    .pagina-intro {
        flex-direction: column;
    }

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

    .formulier-groep-volledig {
        grid-column: auto;
    }
}