/* Smartschool Stats — publieke pagina's (homepage, uitleg, privacy, ...). Zelfde kleuren als het dashboard. */

:root {
    --bg: #f3f4f6;
    --surface: #ffffff;
    --surface-2: #f7f8fa;
    --surface-3: #eef0f3;
    --border: #e1e4e8;
    --border-strong: #c9ced5;
    --text: #15191e;
    --text-2: #444c56;
    --text-3: #6e7781;
    --accent: #1e5fb4;
    --accent-hover: #184f97;
    --accent-weak: #e6eefa;
    --accent-text: #ffffff;
    --good: #18794e;
    --warn: #9a5b00;
    --bad: #c4291f;
    --win: #e9f3ec;
    --radius: 8px;
    --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Roboto, Arial, sans-serif;
    --mono: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
    color-scheme: light;
}

:root[data-theme="dark"] {
    --bg: #101214;
    --surface: #181b1f;
    --surface-2: #1d2125;
    --surface-3: #252a2f;
    --border: #2b3036;
    --border-strong: #3b424a;
    --text: #e8eaed;
    --text-2: #b5bcc4;
    --text-3: #868e97;
    --accent: #6ea8f5;
    --accent-hover: #8cbbf8;
    --accent-weak: #1c2a3d;
    --accent-text: #0d1622;
    --good: #5cc28c;
    --warn: #e0a54a;
    --bad: #f07a70;
    --win: #172a1f;
    color-scheme: dark;
}

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

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3 { margin: 0; line-height: 1.25; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: var(--accent); }
img { max-width: 100%; }
[hidden] { display: none !important; }

.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--text-3); }
.small { font-size: 0.875rem; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* Kop */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.site-header .container { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--text); text-decoration: none; font-weight: 600; white-space: nowrap; }
.brand img { width: 26px; height: 26px; border-radius: 6px; }
.site-nav { display: flex; gap: 20px; margin-left: auto; align-items: center; }
.site-nav a { color: var(--text-2); text-decoration: none; font-size: 0.95rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--text); }
.site-nav a[aria-current="page"] { font-weight: 500; }

/* Knoppen */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 40px;
    padding: 0 16px;
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text) !important;
    font: inherit;
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    cursor: pointer;
    white-space: nowrap;
}
.btn:hover { background: var(--surface-3); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text) !important; }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-small { min-height: 34px; padding: 0 12px; font-size: 0.9rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }

/* Secties */
main { flex: 1; }
.section { padding: 56px 0; }
.section + .section { border-top: 1px solid var(--border); }
.section-head { max-width: 640px; margin-bottom: 28px; }
.section-head h2 { font-size: 1.6rem; }
.section-head p { margin-top: 8px; color: var(--text-2); }

.hero { padding: 64px 0 56px; }
.hero .container { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(2rem, 4.2vw, 2.9rem); letter-spacing: -0.02em; }
.hero-lead { margin-top: 16px; font-size: 1.1rem; color: var(--text-2); max-width: 540px; }
.hero .btn-row { margin-top: 28px; }
.hero-note { margin-top: 14px; font-size: 0.9rem; color: var(--text-3); }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.card-head { padding: 14px 18px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.card-head h3 { font-size: 1rem; }
.card-body { padding: 18px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.feature { padding: 20px; }
.feature h3 { font-size: 1.05rem; margin-bottom: 6px; }
.feature p { color: var(--text-2); font-size: 0.95rem; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; counter-reset: step; }
.steps li { counter-increment: step; padding: 20px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.steps li::before { content: counter(step); display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; margin-bottom: 10px; border-radius: 50%; background: var(--accent-weak); color: var(--accent); font-weight: 600; font-size: 0.9rem; }
.steps h3 { font-size: 1rem; margin-bottom: 4px; }
.steps p { color: var(--text-2); font-size: 0.95rem; }

/* Tabellen (voorbeeld en calculator) */
.table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.table th, .table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); }
.table thead th { color: var(--text-3); font-weight: 500; font-size: 0.8rem; background: var(--surface-2); }
.table tbody tr:last-child > * { border-bottom: 0; }
.table .num { text-align: right; }
.cell-sub { display: block; color: var(--text-3); font-size: 0.78rem; }
.is-win { background: var(--win); font-weight: 600; }
.pos { color: var(--good); }
.neg { color: var(--bad); }
.preview-foot { padding: 12px 18px; border-top: 1px solid var(--border); background: var(--surface-2); font-size: 0.875rem; color: var(--text-2); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; border-radius: 0 0 var(--radius) var(--radius); }

.input {
    height: 38px;
    padding: 0 10px;
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 0.95rem;
    width: 100%;
    min-width: 0;
}
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-weak); }
.input-num { text-align: right; font-variant-numeric: tabular-nums; }
.icon-btn { width: 36px; height: 36px; border: 0; border-radius: 6px; background: none; color: var(--text-3); cursor: pointer; font-size: 1.1rem; }
.icon-btn:hover { background: var(--surface-3); color: var(--bad); }

.calc-row { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr) 36px; gap: 10px; align-items: center; padding: 6px 18px; }
.calc-head { color: var(--text-3); font-size: 0.8rem; padding-top: 12px; }
.calc-result { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; padding: 16px 18px; border-top: 1px solid var(--border); background: var(--surface-2); border-radius: 0 0 var(--radius) var(--radius); }
.calc-result-value { font-size: 2rem; font-weight: 600; font-variant-numeric: tabular-nums; line-height: 1.1; }

/* Tekstpagina's */
.page-head { padding: 48px 0 8px; }
.page-head h1 { font-size: clamp(1.8rem, 3.6vw, 2.4rem); }
.page-head p { margin-top: 10px; color: var(--text-2); max-width: 680px; font-size: 1.05rem; }
.prose { max-width: 720px; padding: 24px 0 64px; }
.prose h2 { font-size: 1.3rem; margin: 36px 0 10px; }
.prose h3 { font-size: 1.05rem; margin: 24px 0 8px; }
.prose p, .prose ul, .prose ol { margin: 0 0 14px; color: var(--text-2); }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: 4px 0; }
.prose strong { color: var(--text); }
.prose code { font-family: var(--mono); font-size: 0.88em; background: var(--surface-3); padding: 1px 5px; border-radius: 4px; }
.note { padding: 14px 16px; border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: var(--radius); background: var(--surface); color: var(--text-2); margin: 0 0 18px; }
.note strong { color: var(--text); }
.note-warn { border-left-color: var(--bad); }
.formula { font-family: var(--mono); font-size: 0.92rem; padding: 12px 14px; background: var(--surface-3); border-radius: 6px; margin: 10px 0; overflow-x: auto; color: var(--text); }
.callout { margin-top: 32px; padding: 20px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.callout p { margin: 4px 0 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); margin-top: auto; }
.site-footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; padding-top: 20px; padding-bottom: 20px; color: var(--text-3); font-size: 0.875rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
.site-footer a { color: var(--text-2); text-decoration: none; }
.site-footer a:hover { color: var(--text); text-decoration: underline; }

.ad-slot { margin: 0 auto; padding: 24px 0; text-align: center; }
.ad-slot:empty { display: none; }

@media (max-width: 860px) {
    .hero .container { grid-template-columns: 1fr; gap: 32px; }
    .grid-3, .steps, .grid-2 { grid-template-columns: 1fr; }
    .site-nav .hide-sm { display: none; }
}

@media (max-width: 560px) {
    .site-header .container { gap: 12px; }
    .site-nav { gap: 14px; }
    .site-nav a:not(.btn) { display: none; }
    .section { padding: 40px 0; }
    .hero { padding: 40px 0; }
    .calc-row { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr) 32px; padding: 6px 12px; gap: 6px; }
    .table th, .table td { padding: 9px 10px; }
}