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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.title {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.password-display {
    background: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 25px;
    position: relative;
    min-height: 60px;
    display: flex;
    align-items: center;
    font-family: 'Courier New', monospace;
    font-size: 16px;
    word-break: break-all;
    transition: all 0.3s ease;
}

.password-display:hover {
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

#passwordText {
    flex: 1;
    padding-right: 80px;
}

.copy-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    transform: translateY(-50%) scale(1.05);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.copy-btn.copied {
    background: #28a745;
}

.length-section {
    margin-bottom: 25px;
}

.length-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    color: #333;
    font-weight: 600;
}

.length-value {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
}

.slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: #e0e0e0;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.options-section {
    margin-bottom: 25px;
}

.section-title {
    color: #333;
    font-weight: 600;
    margin-bottom: 15px;
    font-size: 16px;
}

.checkbox-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.symbols-group {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
    margin-top: 10px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 12px;
    border: 1px solid #e0e0e0;
}

.symbol-item {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 6px;
    transition: background-color 0.2s ease;
    font-size: 14px;
}

.symbol-item:hover {
    background-color: rgba(102, 126, 234, 0.1);
}

.symbol-item input[type="checkbox"] {
    margin-right: 6px;
    cursor: pointer;
    transform: scale(1.1);
}

.symbol-chars {
    font-family: 'Courier New', monospace;
    color: #666;
    margin-left: 4px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background-color 0.2s ease;
}

.checkbox-item:hover {
    background-color: rgba(102, 126, 234, 0.1);
}

.checkbox-item input[type="checkbox"] {
    margin-right: 8px;
    cursor: pointer;
    transform: scale(1.2);
}

.exclude-section {
    margin-top: 15px;
}

.exclude-input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s ease;
    font-family: 'Courier New', monospace;
}

.exclude-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.strength-meter {
    margin-bottom: 25px;
}

.strength-bar-container {
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 8px;
}

.strength-bar {
    height: 100%;
    transition: all 0.5s ease;
    border-radius: 4px;
}

.strength-text {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
}

.strength-score {
    font-size: 14px;
    padding: 2px 8px;
    border-radius: 12px;
    color: white;
}

.generate-btn {
    width: 100%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 15px 20px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.generate-btn:active {
    transform: translateY(0);
}

.warning {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    color: #856404;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 14px;
    display: none;
}