:root {
    --ac-blue: #1D4ED8;
    --ac-blue-dark: #1E3A8A;
    --ac-orange: #F59E0B;
    --ac-bg: #F3F4F6;
}

body {
    background: var(--ac-bg);
    font-family: "Segoe UI", Roboto, Arial, sans-serif;
}

.ac-sidebar {
    min-height: 100vh;
    background: var(--ac-blue-dark);
    color: #fff;
}

.ac-sidebar .nav-link {
    color: #cbd5e1;
    padding: .55rem .9rem;
    border-radius: .4rem;
    font-size: .92rem;
}

.ac-sidebar .nav-link.active,
.ac-sidebar .nav-link:hover {
    background: rgba(255, 255, 255, .12);
    color: #fff;
}

.ac-sidebar .nav-header {
    text-transform: uppercase;
    font-size: .72rem;
    letter-spacing: .04em;
    color: #93a5c4;
    margin: 1.1rem 0 .3rem .9rem;
}

.ac-brand {
    font-weight: 700;
    font-size: 1.05rem;
    padding: 1rem .9rem;
    border-bottom: 1px solid rgba(255, 255, 255, .12);
    margin-bottom: .5rem;
}

.ac-card {
    border: none;
    border-radius: .8rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .08);
}

.ac-stat-value {
    font-size: 1.6rem;
    font-weight: 700;
}

.badge-ok { background: #DCFCE7; color: #166534; }
.badge-partial { background: #FEF3C7; color: #92400E; }
.badge-due { background: #FEE2E2; color: #991B1B; }

.auth-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--ac-blue-dark), var(--ac-blue));
}

.auth-card {
    max-width: 420px;
    width: 100%;
    border-radius: 1rem;
}