:root {
    --primary-color: #0052CC;
    --primary-hover: #0747A6;
    --secondary-color: #42526E;
    --success-color: #00875A;
    --danger-color: #DE350B;
    --warning-color: #FF991F;
    --background-color: #FAFBFC;
    --surface-color: #FFFFFF;
    --border-color: #DFE1E6;
    --text-primary: #172B4D;
    --text-secondary: #5E6C84;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
    --radius-sm: 3px;
    --radius-md: 4px;
    --radius-lg: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 24px 0;
    margin-bottom: 32px;
    box-shadow: var(--shadow-sm);
}

header h1 {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

.language-selector {
    position: absolute;
    top: 24px;
    right: 24px;
}

.language-selector select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--surface-color);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: border-color 0.2s;
}

.language-selector select:hover {
    border-color: var(--primary-color);
}

.auth-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.auth-card {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 100%;
}

.auth-card h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
    text-align: center;
}

.info-text {
    color: var(--text-secondary);
    font-size: 14px;
    text-align: center;
    margin-bottom: 32px;
}

input[type="text"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: border-color 0.2s;
    background-color: var(--surface-color);
}

input[type="text"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    width: 100%;
}

.primary-btn:hover {
    background-color: var(--primary-hover);
}

.action-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.action-btn {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.action-btn:hover {
    background-color: var(--background-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.action-btn.danger {
    color: var(--danger-color);
}

.action-btn.danger:hover {
    background-color: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
}

.search-section {
    margin-bottom: 24px;
}

.search-section input {
    max-width: 400px;
}

.password-list {
    display: grid;
    gap: 16px;
}

.password-item {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: box-shadow 0.2s;
}

.password-item:hover {
    box-shadow: var(--shadow-md);
}

.password-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.password-item-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.password-item-actions {
    display: flex;
    gap: 8px;
}

.icon-btn {
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s;
}

.icon-btn:hover {
    background-color: var(--background-color);
}

.password-item-details p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.password-item-details strong {
    color: var(--text-primary);
}

.password-hidden {
    font-family: monospace;
    letter-spacing: 2px;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
    font-size: 16px;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.2s;
}

.modal-content {
    background-color: var(--surface-color);
    margin: 5% auto;
    padding: 40px;
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: slideIn 0.3s;
}

.close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

.close:hover {
    color: var(--text-primary);
}

.modal h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.password-input-group {
    display: flex;
    gap: 8px;
}

.password-input-group input {
    flex: 1;
}

.toggle-password {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.toggle-password:hover {
    background-color: var(--surface-color);
    border-color: var(--primary-color);
}

.password-strength {
    margin-top: 8px;
    font-size: 12px;
}

.strength-weak {
    color: var(--danger-color);
}

.strength-medium {
    color: var(--warning-color);
}

.strength-strong {
    color: var(--success-color);
}

.strength-very-strong {
    color: var(--primary-color);
}

.generator-options {
    margin-bottom: 24px;
}

input[type="range"] {
    width: 100%;
    margin-top: 8px;
}

.checkbox-group {
    display: grid;
    gap: 12px;
    margin-top: 16px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    font-size: 14px;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
}

.generated-password-display {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.generated-password-display input {
    flex: 1;
    font-family: monospace;
    font-size: 16px;
}

.copy-btn {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.copy-btn:hover {
    background-color: var(--surface-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: var(--success-color);
    color: white;
    padding: 16px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.3s;
    z-index: 2000;
}

.notification.show {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    header {
        padding: 16px 0;
    }
    
    header h1 {
        font-size: 24px;
    }
    
    .auth-card {
        padding: 32px 24px;
    }
    
    .modal-content {
        padding: 32px 24px;
        margin: 10% auto;
    }
    
    .action-bar {
        justify-content: center;
    }
    
    .language-selector {
        position: static;
        margin-top: 16px;
    }
}