body {
    background-color: #f4f6f9;
    font-family: 'Segoe UI', sans-serif;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    width: 240px;
    height: calc(100vh - 60px);
    background-color: #ffffff;
    border-right: 1px solid #dee2e6;
    overflow-y: auto;
    z-index: 1030;
    padding: 0.5rem 0;
}

.sidebar .nav-link {
    color: #444;
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    border-radius: 0;
    transition: background 0.15s;
}

.sidebar .nav-link:hover {
    background-color: #f0f4ff;
    color: #1a3a5c;
}

.sidebar .nav-link.active {
    background-color: #e8f0fe;
    color: #1a3a5c;
    font-weight: 600;
    border-left: 3px solid #1a3a5c;
}

.sidebar-label {
    display: block;
    padding: 0.25rem 1.25rem;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #aaa;
    text-transform: uppercase;
}

/* Main content */
.main-content {
    margin-left: 240px;
    margin-top: 60px;
    padding: 1.5rem;
    min-height: calc(100vh - 60px);
}

/* Cards */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.card-header {
    background-color: #fff;
    border-bottom: 1px solid #f0f0f0;
    font-weight: 600;
    border-radius: 10px 10px 0 0 !important;
}

/* Stat cards */
.stat-card {
    border-radius: 10px;
    padding: 1.25rem;
    color: white;
}

.stat-card .stat-number {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.stat-card .stat-label {
    font-size: 0.8rem;
    opacity: 0.85;
    margin-top: 0.25rem;
}

/* Tables */
.table th {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #666;
    border-top: none;
}

/* Badges for remarks */
.badge-passed     { background-color: #198754; }
.badge-failed     { background-color: #dc3545; }
.badge-incomplete { background-color: #fd7e14; }
.badge-dropped    { background-color: #6c757d; }
.badge-pending    { background-color: #ffc107; color: #000; }
.badge-approved   { background-color: #198754; }
.badge-rejected   { background-color: #dc3545; }

/* Auth pages */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a3a5c 0%, #2e6da4 100%);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    border-radius: 16px;
    padding: 2.5rem;
    background: white;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

@media (max-width: 768px) {
    .sidebar { display: none; }
    .main-content { margin-left: 0; }
}