body {
    font-family: sans-serif; 
    padding: 20px;
    margin: 0;
    background-color: #282a36;
}

.container {
    max-width: 960px;
    width: 100%;
    margin: 0 auto;
    padding: 0;
    border: none;
}

.title {
    font-size: 2em;
    text-align: center;
    margin-bottom: 0.5em;
    color: #f8f8f2;
}

.subtitle {
    text-align: center;
    color: #6272a4;
    margin-bottom: 2em;
}


.converter-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 1024px) {
    .converter-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.converter-card {
    padding: 15px;
    padding-top: 0;
    background-color: #44475a; 
    border: 1px solid #6272a4;
}

.card-title {
    font-size: 1.2em;
    font-weight: bold;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    color: #bd93f9;
    justify-content: center;
}

.icon {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    stroke-width: 2;
    stroke: #bd93f9;
}

.hidden-file-input {
    width: 0.1px;
    height: 0.1px;
    opacity: 0;
    overflow: hidden;
    position: absolute;
    z-index: -1;
}

.custom-file-upload {
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    cursor: pointer;
    border: 1px solid #50fa7b;
    background-color: #50fa7b;
    color: #282a36;
    text-transform: none;
    letter-spacing: initial;
    transition: background-color 0.1s ease;
    box-sizing: border-box;
    font-size: 14px;
}

.custom-file-upload:hover {
    background-color: #f1fa8c;
    border-color: #f1fa8c;
}

#selectedFileName {
    margin-left: 10px;
    color: #44475a; 
}

.file-selected #fileInputLabelText {
    display: none;
}

.custom-file-upload:not(.file-selected) #fileInputLabelText {
    display: initial;
}


.input-area {
    min-height: 200px;
    width: 100%;
    padding: 5px;
    border: 1px solid #6272a4;
    resize: vertical;
    background-color: #282a36;
    color: #f8f8f2;
    margin-bottom: 10px;
    box-sizing: border-box;
}

.input-area:focus {
    outline: 1px solid #bd93f9;
    border-color: #bd93f9;
    box-shadow: none;
}

.file-name-group {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    color: #f8f8f2; 
}

.file-name-label {
    margin-right: 8px;
    white-space: nowrap;
}

.file-name-input {
    flex-grow: 1;
    padding: 5px;
    border: 1px solid #6272a4;
    color: #f8f8f2;
    background-color: #282a36;
    box-sizing: border-box;
}

.option-group {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    color: #f8f8f2;
}

.option-group input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.option-group label {
    position: relative;
    padding-left: 25px;
    cursor: pointer;
    user-select: none;
    margin-left: 5px;
}

.option-group label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    border: 2px solid #bd93f9;
    background-color: #282a36;
    box-sizing: border-box;
    transition: all 0.1s ease;
}

.option-group label::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 50%;
    width: 6px;
    height: 10px;
    border: solid #50fa7b;
    border-width: 0 3px 3px 0;
    transform: translateY(-60%) rotate(45deg);
    opacity: 0; 
    transition: opacity 0.1s ease;
}

.option-group input[type="checkbox"]:checked + label::after {
    opacity: 1;
}

.option-group input[type="checkbox"]:checked + label::before {
    background-color: #44475a;
}

.btn {
    width: 100%;
    padding: 8px;
    cursor: pointer;
    margin-bottom: 10px;
    border: 1px solid #bd93f9;
    background-color: #bd93f9;
    color: #282a36;
    font-weight: bold;
    text-transform: none;
    letter-spacing: initial;
    transition: background-color 0.1s ease;
}

.btn:hover:not(:disabled) {
    background-color: #ff79c6;
    border-color: #ff79c6;
}

.btn:disabled {
    opacity: 0.4;
    cursor: default;
    background-color: #6272a4;
    color: #282a36;
    border-color: #6272a4;
}

.message-box {
    padding: 10px;
    height: 18px;
    margin-top: 20px; 
    margin-bottom: 15px;
    border: 1px solid;
    text-align: center;
    background-color: #44475a;
}

.message-box.hidden {
    visibility: hidden; 
    height: 18px;
    padding: 10px;
    margin-top: 20px; 
    margin-bottom: 15px; 
    border: 1px solid transparent;
    background-color: transparent;
}

.message-box.success {
    visibility: visible;
    border-color: #50fa7b;
    color: #50fa7b;
    background-color: #44475a; 
}

.message-box.error {
    visibility: visible;
    border-color: #ff5555;
    color: #ff5555;
    background-color: #44475a;
}

.message-box.info {
    visibility: visible;
    border-color: #f1fa8c;
    color: #f1fa8c;
    background-color: #44475a;
}

.download-link-container {
    margin-top: 10px;
    text-align: center;
}

.download-link-container a {
    color: #8be9fd;
    font-weight: normal;
    text-decoration: underline;
    display: block;
    margin-top: 5px;
}