:root {
    --bg-color: #1A202C;
    --card-bg: #2D3748;
    --text-color: #E2E8F0;
    --accent-color: #FBBF24;
    --symbol-color: #38B2AC;
    --success-color: #48BB78;
    --ultra-color: #00BFFF;
    --border-color: #4A5568;
    --danger-color: #E53E3E;
    --warning-color: #DD6B20;
    --active-color: #FF5733;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column; 
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

.container {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    margin-bottom: 40px;
}

h2, h3 {
    color: var(--text-color);
    font-size: 1.5rem;
    margin-bottom: 25px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

h3 {
    font-size: 1.25rem;
    margin-top: 0;
    margin-bottom: 15px;
    border-bottom: none;
    padding-bottom: 0;
}

.password-display-wrapper {
    background-color: var(--bg-color);
    border: 2px solid var(--success-color);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center; 
    margin-bottom: 20px;
}

#password-display {
    flex-grow: 1;
    font-family: 'Roboto Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    overflow: hidden;
    word-break: break-all; 
    padding-right: 10px;
    line-height: 1.4; 
    color: var(--text-color); 
}

.symbol {
    color: var(--symbol-color);
}

.copy-btn {
    background-color: var(--accent-color);
    color: var(--bg-color);
    border: none;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.2s;
    flex-shrink: 0; 
}

.copy-btn:hover {
    background-color: #FFD750;
}

.controls-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.refresh-btn {
    background: none;
    color: var(--text-color);
    border: 2px solid var(--border-color);
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    transition: border-color 0.2s;
}

.refresh-btn:hover {
    border-color: var(--text-color);
}

.strength-indicator {
    padding: 5px 10px;
    border-radius: 4px;
    font-weight: bold;
    font-size: 0.9rem;
    text-transform: uppercase;
    text-align: center;
    min-width: 80px;
}

.strength-indicator.weak { background-color: var(--danger-color); color: white; }
.strength-indicator.medium { background-color: var(--warning-color); color: white; }
.strength-indicator.strong { background-color: var(--success-color); color: var(--bg-color); }
.strength-indicator.ultra { background-color: var(--ultra-color); color: var(--bg-color); }

.length-control {
    margin-bottom: 25px;
    padding-top: 5px;
}

.length-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.length-header label, .length-header span {
    font-size: 1.1rem;
    font-weight: bold;
}

.slider-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    flex-grow: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: grab;
    transition: background 0.2s;
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: grab;
}

.slider-wrapper button {
    background-color: var(--border-color);
    color: var(--text-color);
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
}

.option-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 25px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider-toggle {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: 0.4s;
    border-radius: 25px;
}

.slider-toggle:before {
    position: absolute;
    content: "";
    height: 17px;
    width: 17px;
    left: 4px;
    bottom: 4px;
    background-color: var(--text-color);
    transition: 0.4s;
    border-radius: 50%;
}

input:checked + .slider-toggle {
    background-color: var(--success-color);
}

input:checked + .slider-toggle:before {
    transform: translateX(25px);
    background-color: var(--bg-color);
}

.copy-message {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: var(--success-color);
    color: var(--bg-color);
    padding: 10px 15px;
    border-radius: 6px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 1000;
}

.threads-link {
    text-align: center;
    padding: 10px 0;
    font-size: 1rem;
    color: var(--text-color);
}

.threads-link a {
    color: var(--text-color); 
    text-decoration: none;
    transition: color 0.2s;
}

.threads-link .username {
    color: var(--symbol-color); 
    font-weight: bold;
    transition: color 0.2s;
}

.threads-link a:hover .username {
    color: var(--accent-color); 
}

.threads-link a:active .username {
    color: var(--active-color);
    transition: none;
}