:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --dark: #1e293b;
    --light: #f8fafc;
    --border: #e2e8f0;
    --text-main: #334155;
    --green: #10b981;
    --yellow: #f59e0b;
    --red: #ef4444;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background-color: var(--light); color: var(--text-main); }
.hidden { display: none !important; }

/* Buttons */
button { cursor: pointer; border: none; border-radius: 6px; font-weight: 600; transition: 0.2s; }
.btn-primary { background: var(--primary); color: white; padding: 10px 20px; display: inline-flex; align-items: center; gap: 8px; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-large { background: var(--primary); color: white; padding: 15px 40px; font-size: 1.1rem; }
.btn-secondary { background: white; border: 1px solid var(--border); padding: 6px 12px; color: var(--text-main); }
.btn-secondary:hover { background: var(--light); }
.btn-logout { background: transparent; color: var(--text-main); padding: 10px; text-align: left; width: 100%; margin-top: auto; }
.btn-logout:hover { color: var(--red); }

.logo { font-size: 1.5rem; font-weight: bold; color: var(--primary); text-decoration: none; }

/* Links styled as buttons */
a.btn-primary, a.btn-large { text-decoration: none; font-weight: 600; border-radius: 8px; cursor: pointer; transition: 0.2s; }
a.btn-large { display: inline-block; }