body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: #f4f7f6;
    color: #333;
    margin: 0;
    padding: 0;
}

.tdm-top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #cc0000;
    padding: 8px 24px;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.tdm-top-bar-button {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    white-space: nowrap;
    transition: background-color 0.2s;
}

.tdm-top-bar-button:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.container {
    max-width: 600px;
    margin: 30px auto;
    background-color: #fff;
    padding: 30px 40px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

h1 {
    color: #111;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
    margin-top: 0;
    font-size: 28px;
}

p {
    line-height: 1.6;
    color: #555;
    font-size: 16px;
}

.generator-wrapper {
    margin-top: 30px;
}

.password-display {
    display: flex;
    margin-bottom: 10px;
}

#password-output {
    flex-grow: 1;
    border: 1px solid #ccc;
    background-color: #f9f9f9;
    padding: 15px;
    font-size: 20px;
    font-family: monospace;
    border-radius: 8px 0 0 8px;
}

#copy-btn {
    flex-shrink: 0;
    width: 60px;
    border: 1px solid #ccc;
    border-left: none;
    background-color: #e9e9e9;
    font-size: 24px;
    cursor: pointer;
    border-radius: 0 8px 8px 0;
}

.strength-bar {
    width: 100%;
    height: 8px;
    background-color: #e9ecef;
    border-radius: 4px;
    margin-bottom: 25px;
    transition: background-color 0.3s;
}

.strength-bar.strength-1 {
    background: linear-gradient(to right, #dc3545 25%, #e9ecef 25%);
}

.strength-bar.strength-2 {
    background: linear-gradient(to right, #ffc107 50%, #e9ecef 50%);
}

.strength-bar.strength-3 {
    background: linear-gradient(to right, #28a745 75%, #e9ecef 75%);
}

.strength-bar.strength-4 {
    background: linear-gradient(to right, #28a745 100%, #e9ecef 100%);
}

.settings-panel {
    border: 1px solid #ddd;
    padding: 25px;
    border-radius: 8px;
}

.form-group {
    margin-bottom: 20px;
}

.checkbox-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
}

input[type="range"] {
    width: 100%;
}

.submit-btn {
    display: block;
    width: 100%;
    background-color: #cc0000;
    color: #fff;
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.2s;
    margin-top: 20px;
}

.submit-btn:hover {
    background-color: #a10000;
}