/* SimpleMailServer Web UI — minimal hand-written CSS */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: #f5f5f5; color: #333; }
nav { background: #2c3e50; color: #fff; padding: 0.75rem 1.5rem; display: flex; align-items: center; gap: 2rem; }
.nav-brand { font-weight: bold; font-size: 1.1rem; }
.nav-links { list-style: none; display: flex; gap: 1rem; }
.nav-links a { color: #ddd; text-decoration: none; }
.nav-links a:hover { color: #fff; }
main { max-width: 960px; margin: 1.5rem auto; padding: 0 1rem; }
h2 { margin-bottom: 1rem; }
.flash { list-style: none; margin-bottom: 1rem; }
.flash li { padding: 0.5rem 1rem; border-radius: 4px; margin-bottom: 0.25rem; }
.flash .error { background: #f8d7da; color: #721c24; }
.flash .info { background: #d1ecf1; color: #0c5460; }
.flash .success { background: #d4edda; color: #155724; }
form label { display: block; margin-bottom: 0.5rem; }
form input, form select, form textarea { padding: 0.4rem; width: 100%; max-width: 400px; margin-top: 0.25rem; }
button { padding: 0.5rem 1.5rem; background: #3498db; color: #fff; border: none; border-radius: 4px; cursor: pointer; }
button:hover { background: #2980b9; }
button.danger { background: #e74c3c; }
button.danger:hover { background: #c0392b; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
th, td { padding: 0.5rem; text-align: left; border-bottom: 1px solid #ddd; }
th { background: #f0f0f0; }
tr:hover { background: #f9f9f9; }
.stat-box { display: inline-block; background: #fff; border: 1px solid #ddd; border-radius: 6px; padding: 1rem; margin: 0.5rem; min-width: 150px; text-align: center; }
.stat-box h3 { font-size: 0.85rem; color: #666; margin-bottom: 0.25rem; }
.stat-box .value { font-size: 1.5rem; font-weight: bold; color: #2c3e50; }

/* ── Disk Usage Bars ── */
.disk-section { max-width: 600px; margin: 0.5rem 0; }
.disk-bar { margin: 1rem 0; }
.disk-bar-label { font-size: 0.85rem; color: #666; margin-bottom: 0.3rem; word-break: break-all; }
.disk-bar-track { background: #e9ecef; border-radius: 4px; height: 20px; overflow: hidden; }
.disk-bar-fill { height: 100%; border-radius: 4px; min-width: 2px; transition: width 0.3s ease; }
.disk-bar-green { background: #27ae60; }
.disk-bar-yellow { background: #f39c12; }
.disk-bar-red { background: #e74c3c; }
.disk-bar-error { background: #95a5a6; }
.disk-bar-value { font-size: 0.85rem; margin-top: 0.2rem; text-align: right; color: #555; }