.alert {
    position: relative;
    padding: 15px 20px;
    margin-bottom: 20px;
    border: 1px solid transparent;
    border-radius: 5px;
    font-size: 16px;
    line-height: 1.5;
}

.alert-heading {
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 18px;
}

.alert-link {
    font-weight: 600;
    text-decoration: underline;
}

.alert-dismissible {
    padding-right: 50px;
}

.btn-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: transparent;
    border: none;
    font-size: 24px;
    font-weight: 300;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.2s;
    padding: 0;
    width: 20px;
    height: 20px;
    line-height: 20px;
}

.btn-close:hover {
    opacity: 0.8;
}

/* Primary Alert */
.alert-primary {
    color: #084298;
    background-color: #cfe2ff;
    border-color: #b6d4fe;
}

.alert-primary .alert-link {
    color: #06357a;
}

.alert-primary .btn-close {
    color: #084298;
}

/* Secondary Alert */
.alert-secondary {
    color: #41464b;
    background-color: #e2e3e5;
    border-color: #d3d6d8;
}

.alert-secondary .alert-link {
    color: #34383c;
}

.alert-secondary .btn-close {
    color: #41464b;
}

/* Success Alert */
.alert-success {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}

.alert-success .alert-link {
    color: #0c4128;
}

.alert-success .btn-close {
    color: #0f5132;
}

/* Danger Alert */
.alert-danger {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}

.alert-danger .alert-link {
    color: #6a1a21;
}

.alert-danger .btn-close {
    color: #842029;
}

/* Warning Alert */
.alert-warning {
    color: #664d03;
    background-color: #fff3cd;
    border-color: #ffecb5;
}

.alert-warning .alert-link {
    color: #523e02;
}

.alert-warning .btn-close {
    color: #664d03;
}

/* Info Alert */
.alert-info {
    color: #055160;
    background-color: #cff4fc;
    border-color: #b6effb;
}

.alert-info .alert-link {
    color: #04414d;
}

.alert-info .btn-close {
    color: #055160;
}

/* Light Alert */
.alert-light {
    color: #636464;
    background-color: #fefefe;
    border-color: #fdfdfe;
}

.alert-light .alert-link {
    color: #4f5050;
}

.alert-light .btn-close {
    color: #636464;
}

/* Dark Alert */
.alert-dark {
    color: #141619;
    background-color: #d3d3d4;
    border-color: #bcbebf;
}

.alert-dark .alert-link {
    color: #101214;
}

.alert-dark .btn-close {
    color: #141619;
}