/* ========================================
   GRID SYSTEM 
   ======================================== */

.container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 15px;
    box-sizing: border-box;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col-12 {
    flex: 0 0 100%;
    max-width: 100%;
    padding: 0 15px;
    box-sizing: border-box;
}

@media (min-width: 992px) {
    .col-lg-12 {
        flex: 0 0 100%;
        max-width: 100%;
    }
}

/* ========================================
   SPACING UTILITIES
   ======================================== */

.mt-3 {
    margin-top: 1rem;
}

.mt-5 {
    margin-top: 3rem;
}

.mb-5 {
    margin-bottom: 3rem;
}

/* ========================================
   ALERT COMPONENTS
   ======================================== */

.alert {
    position: relative;
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 0.375rem;
}

.alert-light {
    color: #495057;
    background-color: #fcfcfd;
    border-color: #e9ecef;
}

.alert-danger {
    color: #58151c;
    background-color: #f8d7da;
    border-color: #f1aeb5;
}

.alert-success {
    color: #0a3622;
    background-color: #d1e7dd;
    border-color: #a3cfbb;
}

.alert-warning {
    color: #664d03;
    background-color: #fff3cd;
    border-color: #ffe69c;
}

.alert-dark {
    color: #495057;
    background-color: #ced4da;
    border-color: #adb5bd;
}

/* ========================================
   ACCORDION COMPONENT
   ======================================== */

.accordion {
    border-radius: 0.375rem;
}

.accordion-item {
    background-color: #fff;
    border: 1px solid rgba(0, 0, 0, 0.125);
}

.accordion-item:first-of-type {
    border-top-left-radius: 0.375rem;
    border-top-right-radius: 0.375rem;
}

.accordion-item:last-of-type {
    border-bottom-right-radius: 0.375rem;
    border-bottom-left-radius: 0.375rem;
}

.accordion-item:not(:first-of-type) {
    border-top: 0;
}

.accordion-header {
    margin-bottom: 0;
    padding-top: 0;
    margin-top: 0;
}

.accordion-button {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    padding: 0.5rem 1.25rem;
    font-size: 1rem;
    color: #212529;
    text-align: left;
    background-color: #fff;
    border: 0;
    border-radius: 0;
    overflow-anchor: none;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out;
    cursor: pointer;
}

.accordion-button:not(.collapsed) {
    color: #052c65;
    background-color: #cfe2ff;
    box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.125);
}

.accordion-button:after {
    flex-shrink: 0;
    width: 1.25rem;
    height: 1.25rem;
    margin-left: auto;
    content: "";
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23212529'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-size: 1.25rem;
    transition: transform 0.2s ease-in-out;
}

.accordion-button:not(.collapsed):after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23052c65'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
    transform: rotate(-180deg);
}

.accordion-button:hover {
    z-index: 2;
}

.accordion-button:focus {
    z-index: 3;
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.accordion-collapse {
    border-top: 1px solid rgba(0, 0, 0, 0.125);
}

.accordion-item:first-of-type .accordion-button {
    border-top-left-radius: 0.375rem;
    border-top-right-radius: 0.375rem;
}

.accordion-item:last-of-type .accordion-button.collapsed {
    border-bottom-right-radius: 0.375rem;
    border-bottom-left-radius: 0.375rem;
}

.accordion-item:last-of-type .accordion-collapse {
    border-bottom-right-radius: 0.375rem;
    border-bottom-left-radius: 0.375rem;
}

.accordion-body {
    padding: 1rem 1.25rem;
}

/* ========================================
   COLLAPSE FUNCTIONALITY
   ======================================== */

.collapse {
    display: none;
}

.collapse.show {
    display: block;
}

.collapsing {
    height: 0;
    overflow: hidden;
    transition: height 0.35s ease;
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.text-center {
    text-align: center;
}

/* Center tag ersatz (für <center> Tags im HTML) */
center {
    display: block;
    text-align: center;
}

/* ========================================
   RESPONSIVE IMAGES
   ======================================== */

img {
    max-width: 100%;
    height: auto;
}

/* ========================================
   MEDIA QUERIES
   ======================================== */

@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .accordion-button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .accordion-body {
        padding: 0.75rem 1rem;
    }
    
    .alert {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 5px;
    }
    
    .row {
        margin: 0 -5px;
    }
    
    .col-12 {
        padding: 0 5px;
    }
}