:root {
    --primary: #2c3e6b;
    --sidebar-w: 230px;
}

body {
    background: #f4f6fb;
    font-family: 'Segoe UI', Arial, sans-serif;
}

.topbar {
    background: var(--primary);
    height: 60px;
}

.topbar-logo {
    height: 34px;
    width: 34px;
    object-fit: contain;
    border-radius: 4px;
    background: #fff;
}

.app-wrapper {
    display: flex;
    min-height: calc(100vh - 60px);
}

.sidebar {
    width: var(--sidebar-w);
    background: #1e274a;
    padding-top: 1rem;
    flex-shrink: 0;
}

.sidebar .nav-link {
    color: #cfd6f0;
    padding: 0.75rem 1.25rem;
    border-left: 3px solid transparent;
}

.sidebar .nav-link i {
    width: 20px;
}

.sidebar .nav-link:hover {
    background: #2a3560;
    color: #fff;
}

.sidebar .nav-link.active {
    background: #2a3560;
    color: #fff;
    border-left-color: #4e7cff;
}

.content-area {
    flex-grow: 1;
    padding: 1.5rem;
}

.login-body {
    background: linear-gradient(135deg, #2c3e6b, #1e274a);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-box {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 10px 30px rgba(0,0,0,.2);
}

.marks-input {
    width: 70px;
    text-align: center;
}

.report-body {
    background: #fff;
}

.report-logo {
    height: 70px;
    width: 70px;
    object-fit: contain;
}

.report-page {
    max-width: 800px;
    margin: 0 auto;
}