:root { color-scheme: light; font-family: "Segoe UI", sans-serif; color: #3e342c; background: #f7f2e9; }
* { box-sizing: border-box; }
body { margin: 0; }
header, main, footer { width: min(820px, 100% - 40px); margin-inline: auto; }
header { display: flex; justify-content: space-between; gap: 16px; padding-block: 28px; font-size: 14px; }
header span { color: #716e60; }
a { color: #4c654d; text-underline-offset: 4px; }
header a { text-decoration: none; }
main { padding-block: 32px; }
.eyebrow { font-size: 11px; letter-spacing: .17em; color: #6c725b; }
h1 { font: 400 clamp(42px, 8vw, 72px)/1.1 Georgia, serif; margin: 18px 0; }
.intro { max-width: 570px; font-size: 18px; line-height: 1.7; color: #6a6055; }
nav { display: flex; flex-wrap: wrap; gap: 10px; margin-block: 28px; }
nav a { padding: 10px 15px; border: 1px solid #d8d7c8; border-radius: 24px; text-decoration: none; background: #fffaf2; }
nav a:hover { background: #e8eddc; }
.voortgang { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 14px; margin: 32px 0; }
progress { flex: 1; min-width: 120px; height: 9px; accent-color: #657a58; }
section { scroll-margin-top: 20px; margin-bottom: 24px; padding: clamp(20px, 4vw, 36px); border: 1px solid #e4ddcf; border-radius: 22px; background: #fffcf6; box-shadow: 0 5px 20px #46362005; }
.sectiekop { display: flex; gap: 18px; align-items: flex-start; }
.nummer { font: 30px Georgia, serif; color: #8d997c; }
h2 { font: 400 28px Georgia, serif; margin: 0; }
.sectiekop p { margin: 8px 0 20px; color: #746a5e; line-height: 1.5; }
ol { padding: 0; margin: 0 0 22px; list-style: none; }
li + li { border-top: 1px solid #ece6db; }
li label { display: flex; gap: 14px; padding: 17px 0; cursor: pointer; }
input { flex-shrink: 0; width: 20px; height: 20px; margin: 2px 0 0; accent-color: #657a58; }
strong { display: block; margin-bottom: 5px; font-weight: 600; }
li span span { display: block; color: #746a5e; line-height: 1.6; font-size: 15px; }
input:checked + span strong { color: #657a58; text-decoration: line-through; }
.bron { font-size: 13px; }
button { border: 1px solid #b7bea6; border-radius: 10px; background: #e8eddc; color: #394935; padding: 12px 18px; font: inherit; cursor: pointer; }
#klaar { padding: 18px; background: #e8eddc; border-radius: 12px; }
footer { padding-block: 16px 36px; color: #746a5e; font-size: 13px; line-height: 1.7; }
:focus-visible { outline: 3px solid #657a58; outline-offset: 4px; }
@media (max-width: 480px) { header span { display: none; } .sectiekop { gap: 12px; } }

/* Een doorlopende klimplant verbindt de vier hoofdstukken. */
:root { background: #f4f3e8; color: #34402e; }
body {
    background:
        radial-gradient(ellipse at 0 10%, #d9e3c57a, transparent 42%),
        radial-gradient(ellipse at 100% 45%, #e5d9b94d, transparent 45%),
        linear-gradient(180deg, #faf7ee, #eff1e4);
}
header, main, footer { width: min(900px, 100% - 40px); }
h1 { color: #364b34; }
.eyebrow { color: #75815c; }
nav a { background: #ffffff75; border-color: #ced7bd; }
.voortgang { padding: 18px 22px; background: #e6ebda; border-radius: 16px; }
.groeipad { position: relative; padding-left: 100px; isolation: isolate; }
.groeipad::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 90px;
    background: url("studeren101-plant.svg") center top / 90px 360px repeat-y;
    pointer-events: none;
    z-index: -1;
}
.groeipad section {
    position: relative;
    margin-bottom: 0;
    border: 1px solid #d9dfc9;
    border-radius: 9px 34px 9px 34px;
    background: linear-gradient(135deg, #fffdf5f5, #f7f7ecf5);
    box-shadow: 0 10px 30px #34492b08;
}
.groeipad section + section { margin-top: 40px; }
.groeipad section::before {
    content: "";
    position: absolute;
    right: 100%;
    top: 48px;
    width: 58px;
    height: 24px;
    border-top: 2px solid #758763;
    border-radius: 65% 0 0 0;
    transform: rotate(-12deg);
    transform-origin: right center;
    pointer-events: none;
}
.groeipad section::after {
    content: "";
    position: absolute;
    top: 22px;
    left: -33px;
    width: 20px;
    height: 32px;
    border-radius: 90% 0 90% 0;
    background: linear-gradient(120deg, #8ea575, #c1cca5);
    transform: rotate(-20deg);
    pointer-events: none;
}
.nummer { color: #73865d; padding: 7px 9px; background: #e8eddb; border-radius: 50% 8% 50% 8%; font-size: 23px; }
h2 { color: #405637; }
li + li { border-color: #e2e6d6; }
li label { border-radius: 8px; }
li label:hover { background: #e9efdd66; }
li label:has(input:checked) { background: #e7eedb80; }
input { accent-color: #617d4e; }
input:checked + span strong { color: #526b42; }
button { margin-top: 26px; border-radius: 18px 6px 18px 6px; }
footer { padding-top: 24px; border-top: 1px solid #d9dfcc; }
@media (max-width: 600px) {
    header, main, footer { width: calc(100% - 28px); }
    .groeipad { padding-left: 34px; }
    .groeipad::before { left: -6px; width: 36px; background-size: 36px 144px; }
    .groeipad section { padding: 22px 16px; border-radius: 8px 22px 8px 22px; }
    .groeipad section + section { margin-top: 28px; }
    .groeipad section::before { width: 24px; top: 40px; }
    .groeipad section::after { left: -17px; top: 23px; width: 11px; height: 20px; }
    .sectiekop { gap: 10px; }
    h2 { font-size: 24px; }
    .nummer { font-size: 18px; padding: 6px; }
    .voortgang { padding: 15px; }
}



/* Comfortabel bedienen op telefoon en tablet. */
@media (pointer: coarse), (max-width: 700px) {
    nav a, button, header a { min-height: 44px; display: inline-flex; align-items: center; }
    input[type="checkbox"] { width: 24px; height: 24px; }
    .bron { display: inline-flex; align-items: center; min-height: 44px; }
    li label { min-height: 48px; }
    .sectiekop > div, li label > span { min-width: 0; overflow-wrap: anywhere; }
    footer { padding-bottom: calc(36px + env(safe-area-inset-bottom)); }
}