:root {
    --primary: #1a365d;
    --secondary: #2c5282;
    --accent: #3182ce;
    --success: #38a169;
    --warning: #d69e2e;
    --danger: #e53e3e;
    --background: #f7fafc;
    --text: #2d3748;
    --text-muted: #718096;
    --border: #e2e8f0;
    --sidebar-width: 260px;
}

html {
    font-size: 14px;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
    position: relative;
    min-height: 100%;
}

body {
    margin-bottom: 60px;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}


/* Cards */
.card {
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: box-shadow 0.2s ease;
}

    .card:hover {
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

.card-header {
    background-color: #fff;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}

/* Certificate Card */
    .certificate-card {
        position: relative;
        overflow: hidden;
    }

    .certificate-card .status-ribbon {
        position: absolute;
        top: 10px;
        right: -35px;
        background: var(--success);
        color: #fff;
        padding: 0.25rem 2.5rem;
        font-size: 0.7rem;
        font-weight: 600;
        text-transform: uppercase;
        transform: rotate(45deg);
    }

    .certificate-card .status-ribbon.expiring {
        background: var(--warning);
    }

    .certificate-card .status-ribbon.expired {
        background: var(--danger);
    }

/* Status Badges */
.badge-status {
    padding: 0.35rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 0.25rem;
}

.badge-valid {
    background-color: rgba(56, 161, 105, 0.1);
    color: var(--success);
}

.badge-expiring {
    background-color: rgba(214, 158, 46, 0.1);
    color: var(--warning);
}

.badge-expired {
    background-color: rgba(229, 62, 62, 0.1);
    color: var(--danger);
}

.badge-enrolled {
    background-color: rgba(49, 130, 206, 0.1);
    color: var(--accent);
}

.badge-completed {
    background-color: rgba(56, 161, 105, 0.1);
    color: var(--success);
}