:root {
    --primary: #1565d8;
    --primary-dark: #0f4fb0;
    --sidebar-width: 240px;
    --bg-light: #f4f7fb;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-light);
    font-family: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
    color: #22252a;
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline-primary:hover {
    background-color: var(--primary);
    border-color: var(--primary);
}

a {
    color: var(--primary);
}

.nav-pills .nav-link.active {
    background-color: var(--primary);
}

.nav-tabs .nav-link.active {
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
    font-weight: 600;
}

/* ---------- Layout ---------- */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--primary), var(--primary-dark));
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 22px 20px;
    font-size: 1.15rem;
    font-weight: 700;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.sidebar-brand i {
    font-size: 1.5rem;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    padding: 12px 0;
}

.sidebar-nav a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    padding: 12px 22px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    transition: background-color 0.15s ease;
}

.sidebar-nav a i {
    font-size: 1.05rem;
    width: 20px;
}

.sidebar-nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.sidebar-nav a.active {
    background-color: rgba(255, 255, 255, 0.18);
    color: #fff;
    font-weight: 600;
    border-right: 3px solid #fff;
}

.sidebar-nav a.text-danger {
    color: #ffd3d3 !important;
    margin-top: auto;
}

.app-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-width: 0;
}

.page-title {
    font-weight: 700;
    color: #1a1d21;
}

/* ---------- Cards ---------- */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(22, 40, 70, 0.08);
}

.card-header {
    background-color: #fff;
    border-bottom: 1px solid #eef1f5;
    font-weight: 600;
    border-radius: 10px 10px 0 0 !important;
}

.stat-card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(22, 40, 70, 0.08);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1;
}

.stat-label {
    color: #6c757d;
    font-size: 0.85rem;
    margin-top: 4px;
}

/* ---------- Login page ---------- */
.login-body {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.login-card {
    background: #fff;
    border-radius: 14px;
    padding: 40px 36px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.login-brand {
    text-align: center;
    margin-bottom: 24px;
}

.login-brand i {
    font-size: 2.5rem;
    color: var(--primary);
}

.login-brand h1 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 8px 0 0;
}

.login-brand p {
    color: #6c757d;
    margin: 0;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .app-sidebar {
        position: static;
        width: 100%;
        height: auto;
    }
    .app-content {
        margin-left: 0;
    }
    .app-wrapper {
        flex-direction: column;
    }
    .sidebar-nav {
        flex-direction: row;
        flex-wrap: wrap;
    }
    .sidebar-nav a.text-danger {
        margin-top: 0;
    }
}