:root {
    --bg: #0d1117;
    --panel: #161b22;
    --accent: #7c3aed;
    --text: #e6edf3;
    --muted: #8b949e;
    --border: #30363d;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: #0b0f14;
    border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 8px; }
.brand .logo { font-size: 24px; }
.brand-name { color: var(--text); font-weight: 700; text-decoration: none; }

.nav-links { display: flex; gap: 16px; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a:hover { color: var(--text); }

.user-area { display: flex; align-items: center; gap: 12px; }
.user-name { color: var(--text); font-weight: 600; }
.link-button {
    background: none;
    border: none;
    color: var(--muted);
    cursor: pointer;
    text-decoration: underline;
}
.btn {
    background: var(--accent);
    color: white;
    padding: 8px 14px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
}
.btn.secondary { background: #243055; }

.content { padding: 24px; max-width: 1100px; margin: 0 auto; }

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.35);
}

.panel h2 { margin-top: 0; }
.panel .meta { color: var(--muted); font-size: 12px; }

.form-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-field input, .form-field textarea, .form-field select {
    background: #0f1520;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px;
}

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { border-bottom: 1px solid var(--border); padding: 10px; text-align: left; }
.table th { color: var(--muted); font-weight: 500; }

.badge { display: inline-block; padding: 4px 8px; border-radius: 999px; background: #1f2937; color: var(--muted); font-size: 12px; }
.badge.accent { background: #2c1b4e; color: #d8b4fe; }

.markdown { border: 1px solid var(--border); border-radius: 10px; padding: 12px; background: #0f1520; }

.learn-container { display: grid; gap: 16px; grid-template-columns: 2fr 1fr; align-items: start; }
.learn-card { padding: 16px; border-radius: 12px; border: 1px solid var(--border); background: #0f1520; }
.learn-card h3 { margin-top: 0; }
.learn-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.footer { padding: 16px 24px; color: var(--muted); text-align: center; border-top: 1px solid var(--border); }

.alert { padding: 12px; border-radius: 8px; margin-bottom: 12px; }
.alert.success { background: #123524; color: #a6f4c5; }
.alert.warning { background: #3b2c0f; color: #facc15; }
.alert.info { background: #112240; color: #93c5fd; }