body {
    background: #0f172a;
    font-family: "Segoe UI", sans-serif;
}

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

/* Sidebar */
.sidebar {
    width: 270px;
    background: linear-gradient(180deg, #111827, #0b1220);
    color: white;
    padding: 20px;
    border-right: 1px solid rgba(255,255,255,0.05);
}

/* Sidebar brand */
.sidebar .brand {
    font-size: 20px;
    font-weight: bold;
    padding: 10px 0;
    margin-bottom: 20px;
    color: #60a5fa;
}

/* Sidebar links */
.sidebar a {
    color: #cbd5e1;
    text-decoration: none;
    display: block;
    padding: 10px 12px;
    border-radius: 10px;
    transition: 0.3s;
}

.sidebar a:hover {
    background: rgba(96,165,250,0.15);
    color: #fff;
    transform: translateX(4px);
}

/* Active state */
.sidebar a.active {
    background: #2563eb;
    color: white;
}

/* Collapse menu */
.collapse .nav-link {
    font-size: 14px;
    margin-left: 10px;
}

/* Content */
.content {
    flex: 1;
    padding: 25px;
    background: #0b1220;
}

/* Topbar */
.topbar {
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
    padding: 12px 20px;
    border-radius: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    color: white;
}

/* Cards */
.card-ui {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    padding: 20px;
    border-radius: 18px;
    color: white;
    transition: 0.3s;
}

.card-ui:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.07);
}

/* Dropdown */
.dropdown-menu {
    border-radius: 12px;
    border: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}