:root {
    --tekst: #16243d;
    --tekst-zacht: #5a6b85;
    --accent: #2d68c4;
    --accent-donker: #2354a0;
    --accent-licht: #e3ecf9;
    --achtergrond: #f1f5fb;
    --kaart: #ffffff;
    --rand: #cfd9e8;
    --fout: #b3203c;
    --fout-bg: #fdecef;
    --succes: #1b6b3a;
    --succes-bg: #e8f6ee;
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100dvh;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--tekst);
    background: var(--achtergrond);
}

.pagina {
    width: 100%;
    max-width: 28rem;
    min-height: 100dvh;
    margin: 0 auto;
    padding: 1.25rem 1rem 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1.5rem;
}

.kaart {
    background: var(--kaart);
    border-radius: 20px;
    padding: 1.5rem 1.25rem;
    box-shadow: 0 10px 30px rgba(22, 36, 61, 0.1);
}

h1 {
    margin: 0 0 1.25rem;
    font-size: 1.5rem;
    line-height: 1.25;
    text-align: center;
}

h2 {
    margin: 0 0 0.75rem;
    font-size: 1.15rem;
}

.veld {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.95rem;
    font-weight: 600;
}

input,
select,
textarea {
    width: 100%;
    padding: 0.75rem 0.875rem;
    font: inherit;
    font-size: 1rem;
    color: var(--tekst);
    background: #fff;
    border: 1.5px solid var(--rand);
    border-radius: 10px;
}

textarea {
    resize: vertical;
}

input[type="date"] {
    display: block;
    min-width: 0;
    max-width: 100%;
    height: calc(3rem + 3px);
    -webkit-appearance: none;
    appearance: none;
    text-align: left;
}

input[type="date"]::-webkit-date-and-time-value {
    text-align: left;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid rgba(45, 104, 196, 0.25);
    border-color: var(--accent);
}

input[type="file"] {
    padding: 0.5rem;
}

input[type="file"]::file-selector-button {
    margin-right: 0.75rem;
    padding: 0.5rem 0.9rem;
    font: inherit;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-licht);
    border: 0;
    border-radius: 999px;
    cursor: pointer;
}

.hint {
    margin: 0.3rem 0 0;
    font-size: 0.85rem;
    color: var(--tekst-zacht);
}

.knop {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 3rem;
    padding: 0 1.25rem;
    font: inherit;
    font-weight: 700;
    text-decoration: none;
    color: #fff;
    background: var(--accent);
    border: 2px solid var(--accent);
    border-radius: 999px;
    cursor: pointer;
}

.knop:hover {
    background: var(--accent-donker);
    border-color: var(--accent-donker);
}

.knop:focus-visible {
    outline: 3px solid rgba(45, 104, 196, 0.35);
    outline-offset: 2px;
}

.knop-secundair {
    color: var(--accent);
    background: transparent;
}

.knop-secundair:hover {
    color: #fff;
}

.wissel {
    margin: 1.5rem 0 0;
    text-align: center;
    color: var(--tekst-zacht);
}

.wissel a {
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
}

.wissel a:hover {
    text-decoration: underline;
}

.wissel a:focus-visible {
    outline: 3px solid rgba(45, 104, 196, 0.35);
    outline-offset: 2px;
    border-radius: 4px;
}

.verplicht {
    color: var(--accent);
}

.melding {
    margin: 0 0 1rem;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    border-radius: 10px;
}

.melding-fout {
    color: var(--fout);
    background: var(--fout-bg);
}

.melding-succes {
    color: var(--succes);
    background: var(--succes-bg);
}

[hidden] {
    display: none !important;
}

.knoppen {
    display: grid;
    gap: 0.75rem;
}

.kaart > .knoppen,
.kaart > .uitleg {
    margin-bottom: 1rem;
}

.stappen {
    margin: 0 0 1rem;
    padding-left: 1.25rem;
}

.uitleg input {
    margin: 0.5rem 0;
    font-size: 0.85rem;
}

.uitleg h2 {
    margin-top: 1.25rem;
}

.uitleg li {
    margin-bottom: 0.75rem;
}

@media (min-width: 40rem) {
    .kaart {
        padding: 2rem;
    }
}

.keuze-kop {
    margin: 1.25rem 0 0.75rem;
    font-size: 1rem;
    text-align: center;
}

.os-keuze {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.os-knop {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 0.5rem;
    font: inherit;
    font-weight: 700;
    color: var(--tekst);
    background: var(--kaart);
    border: 2px solid var(--rand);
    border-radius: 16px;
    cursor: pointer;
}

.os-knop:hover { border-color: var(--accent); }

.os-knop[aria-pressed="true"] {
    border-color: var(--accent);
    background: var(--accent-licht);
}

.os-knop:focus-visible {
    outline: 3px solid rgba(45, 104, 196, 0.35);
    outline-offset: 2px;
}

.os-logo {
    width: 3.5rem;
    height: 3.5rem;
}

.paneel {
    margin-bottom: 1rem;
    padding: 1rem;
    border: 1.5px solid var(--rand);
    border-radius: 16px;
}

.paneel h2 {
    margin: 0 0 0.75rem;
    font-size: 1.1rem;
}

.paneel h3 {
    margin: 1.25rem 0 0.5rem;
    font-size: 1rem;
}

.paneel .melding { margin-bottom: 0.75rem; }

.protocol {
    display: inline-block;
    padding: 0 0.4rem;
    border-radius: 6px;
    background: var(--accent-licht);
    color: var(--accent-donker);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.9em;
    font-weight: 700;
}