:root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --text: #1a2332;
    --muted: #5c6778;
    --border: #d8dee6;
    --accent: #1f6feb;
    --accent-hover: #1858c7;
    --pass: #1a7f4c;
    --error: #b42318;
    --success-bg: #e6f4ea;
    --error-bg: #fce8e6;
    --font: "Segoe UI", system-ui, sans-serif;
    --radius: 8px;
    --max: 1080px;
}

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

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.5;
}

a { color: var(--accent); }
a:hover { color: var(--accent-hover); }

.site-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1.25rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.brand {
    font-weight: 700;
    text-decoration: none;
    color: var(--text);
    margin-right: auto;
}

.site-nav { display: flex; flex-wrap: wrap; gap: 0.75rem 1rem; }
.site-nav a { text-decoration: none; font-size: 0.95rem; }

.header-user { display: flex; align-items: center; gap: 0.75rem; }
.user-chip { font-size: 0.85rem; color: var(--muted); }

.site-main {
    max-width: var(--max);
    margin: 0 auto;
    padding: 1.5rem 1.25rem 3rem;
}

.site-footer {
    text-align: center;
    padding: 1rem;
    font-size: 0.85rem;
    color: var(--muted);
    border-top: 1px solid var(--border);
}

.flash {
    max-width: var(--max);
    margin: 0.75rem auto 0;
    padding: 0.65rem 1rem;
    border-radius: var(--radius);
}
.flash-success { background: var(--success-bg); color: var(--pass); }
.flash-error { background: var(--error-bg); color: var(--error); }

.page-header { margin-bottom: 1.5rem; }
.page-header h1 { margin: 0.25rem 0; font-size: 1.75rem; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.75rem; color: var(--muted); margin: 0; }
.lede { color: var(--muted); max-width: 42rem; }
.fine-print { font-size: 0.85rem; color: var(--muted); }
.muted { color: var(--muted); }

.hero { padding: 2rem 0; }
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1rem; }

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.split-panels { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    font: inherit;
    cursor: pointer;
    text-decoration: none;
    background: transparent;
}
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-ghost { border-color: var(--border); color: var(--text); }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.9rem; }

.stack-form label { display: block; margin-bottom: 0.75rem; }
.stack-form input[type="text"],
.stack-form input[type="email"],
.stack-form input[type="password"],
.stack-form input[type="number"],
.stack-form input[type="date"],
.stack-form textarea,
.stack-form select {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font: inherit;
}
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 0.75rem; }

.inline-form { display: inline; }

.auth-card { max-width: 420px; margin: 2rem auto; }

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}
.course-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
}
.course-card h2 { margin-top: 0; font-size: 1.15rem; }
.meta { font-size: 0.85rem; color: var(--muted); }
.card-actions { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.75rem; }

.badge {
    display: inline-block;
    font-size: 0.75rem;
    padding: 0.15rem 0.45rem;
    border-radius: 999px;
    background: #eef1f5;
    color: var(--muted);
}
.badge-pass { background: var(--success-bg); color: var(--pass); }

.progress-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.75rem;
    max-width: 320px;
}
.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--accent);
    border-radius: 999px;
}

.learn-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 1rem;
}
@media (max-width: 768px) {
    .learn-layout { grid-template-columns: 1fr; }
}

.lesson-outline { padding-left: 1.25rem; }
.lesson-outline li.is-done { color: var(--pass); }

.prose p { margin: 0.75rem 0; }
.lesson-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1.5rem; }

.question-block { border: none; margin: 0 0 1.25rem; padding: 0; }
.question-block legend { font-weight: 600; margin-bottom: 0.5rem; }
.choice { display: flex; align-items: flex-start; gap: 0.5rem; margin: 0.35rem 0; font-weight: normal; }

.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; background: var(--surface); }
.data-table th, .data-table td {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
}
.data-table th { font-size: 0.85rem; color: var(--muted); }

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
}
.stat-value { display: block; font-size: 1.75rem; font-weight: 700; }
.stat-label { font-size: 0.85rem; color: var(--muted); }

.certificate {
    background: var(--surface);
    border: 2px solid var(--text);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
}
.cert-name { font-size: 1.5rem; font-weight: 700; }

.portal-builder .site-header { border-bottom-color: #3d2e6b; }
.portal-admin .site-header { border-bottom-color: #6b2e2e; }