:root {
    --edutrack-green: #1e8e3e;
    --edutrack-green-dark: #176b31;
    --edutrack-blue: #1a73e8;
    --edutrack-bg: #f6f8fb;
    --edutrack-border: #dfe4ea;
    --edutrack-text: #263238;
}

body {
    background: var(--edutrack-bg);
    color: var(--edutrack-text);
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: .2px;
}

.brand-mark {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--edutrack-green);
    color: #fff;
    font-weight: 700;
}

.app-shell {
    min-height: calc(100vh - 64px);
}

.sidebar {
    background: #fff;
    border-right: 1px solid var(--edutrack-border);
    min-height: calc(100vh - 64px);
}

    .sidebar .nav-link {
        color: #455a64;
        border-radius: 8px;
        margin-bottom: 4px;
    }

        .sidebar .nav-link.active,
        .sidebar .nav-link:hover {
            background: #e8f5e9;
            color: var(--edutrack-green-dark);
        }

.page-title {
    font-weight: 700;
}

.hero {
    background: linear-gradient(120deg, rgba(30, 142, 62, .96), rgba(26, 115, 232, .9)), url("https://images.unsplash.com/photo-1523240795612-9a054b0db644?auto=format&fit=crop&w=1600&q=80");
    background-size: cover;
    background-position: center;
    color: #fff;
    min-height: 520px;
}

.course-banner {
    background: linear-gradient(120deg, rgba(30, 142, 62, .94), rgba(26, 115, 232, .88)), url("https://images.unsplash.com/photo-1509062522246-3755977927d7?auto=format&fit=crop&w=1400&q=80");
    background-size: cover;
    background-position: center;
    color: #fff;
    border-radius: 12px;
}

.card {
    border: 1px solid var(--edutrack-border);
    border-radius: 8px;
    box-shadow: 0 4px 14px rgba(26, 35, 46, .04);
}

.btn-success {
    background: var(--edutrack-green);
    border-color: var(--edutrack-green);
}

    .btn-success:hover {
        background: var(--edutrack-green-dark);
        border-color: var(--edutrack-green-dark);
    }

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #e8f5e9;
    color: var(--edutrack-green-dark);
    font-weight: 700;
}

.metric {
    font-size: 2rem;
    font-weight: 700;
}

.stream-item {
    border-left: 4px solid var(--edutrack-green);
}

.form-card {
    max-width: 760px;
}

.table > :not(caption) > * > * {
    vertical-align: middle;
}

@media (max-width: 991.98px) {
    .sidebar {
        min-height: auto;
        border-right: 0;
        border-bottom: 1px solid var(--edutrack-border);
    }
}



.course-code-box {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border: 1px solid #dee2e6;
    border-radius: 10px;
    background-color: #f8f9fa;
    font-size: 0.875rem;
}

.course-code-label {
    color: #6c757d;
    font-weight: 500;
}

.course-code-value {
    font-family: Consolas, Monaco, monospace;
    font-weight: 600;
    color: #212529;
    letter-spacing: 0.3px;
}

.course-code-copy-btn {
    border: none;
    background: transparent;
    color: #198754;
    padding: 0;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
}

    .course-code-copy-btn:hover {
        color: #146c43;
    }