:root {
    --primary: #4a6bdf;
    --primary-dark: #3a5bc7;
    --secondary: #6b7fd7;
    --accent: #f03a47;
    --accent-dark: #d02835;
    --background: #f8f9fc;
    --card-bg: #ffffff;
    --text: #2c3e50;
    --text-light: #7f8c8d;
    --border: #e1e8ed;
    --success: #2ecc71;
    --warning: #f39c12;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --radius: 16px;
}

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

body {
    font-family: 'Inter', 'Segoe UI', Roboto, sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
}

.password-generator-container {
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
}

.password-generator-tool-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px;
    margin-bottom: 40px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.password-generator-tool-card:hover {
    box-shadow: var(--shadow-hover);
}

.password-generator-tool-header {
    text-align: center;
    margin-bottom: 40px;
}

.password-generator-tool-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 10px;
}

.password-generator-tool-header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

.password-generator-control-panel {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-bottom: 30px;
}

.password-generator-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.password-generator-option {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    cursor: pointer;
}

.password-generator-option input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
    cursor: pointer;
}

.password-generator-length-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

.password-generator-length-group label {
    font-weight: 600;
    color: var(--text);
}

.password-generator-length-group input[type="range"] {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: var(--border);
    outline: none;
    -webkit-appearance: none;
}

.password-generator-length-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
}

.password-generator-length-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: none;
}

.password-generator-length-group #length-value {
    font-weight: 700;
    color: var(--primary);
    min-width: 30px;
    text-align: center;
}

.password-generator-generate-btn {
    padding: 16px 32px;
    border: none;
    border-radius: 50px;
    background: var(--primary);
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    align-self: center;
}

.password-generator-generate-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(74, 107, 223, 0.3);
}

.password-generator-output {
    margin-top: 30px;
}

.password-generator-result {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.password-generator-result input[type="text"] {
    flex: 1;
    padding: 16px 20px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text);
    background: var(--background);
    outline: none;
    transition: var(--transition);
}

.password-generator-result input[type="text"]:focus {
    border-color: var(--primary);
}

.password-generator-copy-btn {
    padding: 16px 24px;
    border: none;
    border-radius: var(--radius);
    background: var(--success);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.password-generator-copy-btn:hover {
    background: #27ae60;
    transform: translateY(-2px);
}

.password-generator-strength {
    text-align: center;
    padding: 12px;
    background: var(--background);
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
}

.password-generator-strength.very-weak {
    color: #e74c3c;
}

.password-generator-strength.weak {
    color: #e67e22;
}

.password-generator-strength.medium {
    color: #f1c40f;
}

.password-generator-strength.strong {
    color: #2ecc71;
}

.password-generator-strength.very-strong {
    color: #27ae60;
}

.password-generator-copy-notification {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--success);
    color: white;
    padding: 15px 30px;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: var(--shadow);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1001;
}

.password-generator-copy-notification.show {
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .password-generator-options {
        grid-template-columns: 1fr;
    }

    .password-generator-length-group {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .password-generator-result {
        flex-direction: column;
    }

    .password-generator-copy-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .password-generator-tool-card {
        padding: 25px 20px;
    }

    .password-generator-tool-header h2 {
        font-size: 2rem;
    }
}