:root {
    --navy: #0B1F3A;
    --deep-navy: #081827;
    --sky: #38BDF8;
    --light-sky: #E0F7FF;
    --app-bg: #F4F8FB;
    --card-bg: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #dbe6ef;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text);
    background: var(--app-bg);
}

.erp-shell {
    min-height: 100vh;
    display: flex;
}

.erp-sidebar {
    width: 260px;
    background: linear-gradient(180deg, var(--navy), var(--deep-navy));
    color: #cfe5ff;
    padding: 1rem 0.85rem;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1050;
    overflow-y: auto;
}

.erp-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.15);
    margin-bottom: 0.85rem;
}

.brand-drop {
    width: 16px;
    height: 22px;
    background: linear-gradient(180deg, #7dd3fc, #0ea5e9);
    border-radius: 55% 55% 55% 55% / 65% 65% 45% 45%;
    transform: rotate(45deg);
}

.brand-title { color: #fff; font-weight: 700; line-height: 1.2; }
.brand-sub { color: #b8d6f5; font-size: 0.75rem; }

.erp-nav-title {
    color: #9ec0e8;
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 1rem 0 0.3rem;
    padding: 0 0.6rem;
}

.erp-nav a {
    display: block;
    color: #cfe5ff;
    text-decoration: none;
    padding: 0.55rem 0.7rem;
    border-radius: 0.6rem;
    margin-bottom: 0.2rem;
    transition: all 0.2s ease;
}

.erp-nav a:hover,
.erp-nav a.active,
.erp-nav a[aria-current="page"] {
    background: rgba(56, 189, 248, 0.2);
    color: #ffffff;
}

.erp-main {
    flex: 1;
    margin-left: 260px;
    min-width: 0;
}

.erp-topbar {
    height: 64px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.erp-page-title {
    font-size: 1.05rem;
    margin: 0;
    font-weight: 700;
    color: var(--navy);
}

.erp-content { padding: 1rem; }

.user-chip {
    background: var(--light-sky);
    color: var(--navy);
    border: 1px solid #b9e8fb;
    border-radius: 999px;
    padding: 0.3rem 0.65rem;
    font-size: 0.85rem;
}

.btn-sky, .btn-primary {
    background: var(--sky);
    border-color: var(--sky);
    color: #083344;
    font-weight: 600;
}

.btn-sky:hover, .btn-primary:hover {
    background: #1daeea;
    border-color: #1daeea;
    color: #062f3f;
}

.btn-toggle {
    border: 1px solid var(--border);
    background: #fff;
    color: var(--navy);
}

.card {
    border: 1px solid var(--border);
    border-radius: 0.9rem;
    background: var(--card-bg);
    box-shadow: 0 8px 20px rgba(11,31,58,0.05);
}

.card-header {
    background: #fff;
    border-bottom: 1px solid var(--border);
    border-radius: 0.9rem 0.9rem 0 0;
}

.table { --bs-table-bg: #fff; }
.table thead th {
    background: #f8fbff;
    color: #0f2f57;
    font-weight: 600;
    border-bottom-width: 1px;
}

.badge-status-active { background: #dcfce7; color: #166534; }
.badge-status-inactive { background: #fee2e2; color: #991b1b; }

.form-control, .form-select {
    border-radius: 0.55rem;
    border-color: #cfe0ed;
}

.form-control:focus, .form-select:focus {
    border-color: #7dd3fc;
    box-shadow: 0 0 0 0.2rem rgba(56, 189, 248, 0.18);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(8, 24, 39, 0.45);
    z-index: 1040;
}

.stat-card .label { color: var(--muted); font-size: 0.85rem; }
.stat-card .value { font-size: 1.4rem; font-weight: 700; color: var(--navy); }

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: linear-gradient(120deg, #e8f6ff, #f7fbff);
}

.login-card {
    width: min(380px, calc(100vw - 2rem));
}

@media (max-width: 991.98px) {
    .erp-sidebar {
        transform: translateX(-100%);
        transition: transform 0.25s ease;
    }

    .erp-shell.sidebar-open .erp-sidebar {
        transform: translateX(0);
    }

    .erp-shell.sidebar-open .sidebar-overlay {
        display: block;
    }

    .erp-main {
        margin-left: 0;
    }

    .erp-content {
        padding: 0.85rem;
    }

    .erp-page-title {
        font-size: 0.95rem;
    }
}