* { box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    max-width: 780px;
    margin: 0 auto;
    padding: 0 1rem 3rem;
    color: #1a1a1a;
    line-height: 1.5;
}
header { padding: 1rem 0; border-bottom: 1px solid #ddd; margin-bottom: 1.5rem; }
header h1 { font-size: 1.1rem; margin: 0 0 0.5rem; }
header h1 a { color: inherit; text-decoration: none; }
nav a { margin-right: 0.25rem; font-size: 0.9rem; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; }
th, td { text-align: left; padding: 0.5rem; border-bottom: 1px solid #eee; }
.flash { padding: 0.75rem 1rem; margin-bottom: 1rem; border-radius: 4px; }
.flash-success { background: #e6f4ea; border: 1px solid #b7e0c4; }
.flash-error { background: #fce8e6; border: 1px solid #f3b4ad; }
form { margin: 1rem 0; }
label { display: block; margin-bottom: 0.25rem; font-weight: 600; }
input, select { width: 100%; max-width: 400px; padding: 0.4rem; margin-bottom: 1rem; }
button, input[type=submit] { padding: 0.5rem 1rem; cursor: pointer; }
.badge { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 3px; font-size: 0.8rem; }
.badge-pending { background: #fef3cd; }
.badge-complete { background: #e6f4ea; }
.badge-conflict { background: #fce8e6; }
.muted { color: #666; font-size: 0.9rem; }