.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    border-radius: 20px;
    padding: 30px;
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    max-width: 500px;
    width: 100%;
    text-align: center;
}

h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

.buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
}

button {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px 20px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    font-weight: 500;
    -webkit-tap-highlight-color: transparent;
}

button:focus {
    outline: none;
}

button:active {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(0);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

button:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

textarea {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 16px;
    resize: none;
    margin-bottom: 20px;
    transition: border-color 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
}

.checkbox-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.checkbox-container input {
    display: none;
}

.checkbox-container label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    position: relative;
}

.checkbox-container label::before {
    content: '';
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 5px;
    background: transparent;
    transition: all 0.3s ease;
}

.checkbox-container label::after {
    content: '✓';
    position: absolute;
    left: 5px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    opacity: 0;
    transition: opacity 0.3s ease;
    line-height: 1;
    height: 14px;
    display: flex;
    align-items: center;
}

.checkbox-container input:checked+label::before {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.8);
}

.checkbox-container input:checked+label::after {
    opacity: 1;
}

#result {
    white-space: pre-wrap;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    padding: 15px;
    border-radius: 10px;
    font-family: 'Courier New', Courier, monospace;
    overflow-x: auto;
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: left;
}

.mode-button {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.mode-button::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.mode-button:disabled::after {
    width: 80%;
}

textarea {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease forwards;
}