:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --success: #4cc9f0;
    --danger: #f72585;
    --warning: #f8961e;
    --light: #f8f9fa;
    --dark: #212529;
    --text: #333;
    --bg: #f5f7fa;
    --card: #fff;
    --border: #dee2e6;
}

[data-theme="dark"] {
    --primary: #4895ef;
    --secondary: #4361ee;
    --text: #f8f9fa;
    --bg: #212529;
    --card: #2b2d42;
    --border: #495057;
}

* {
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 10px;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    line-height: 1.5;
}

.container {
    width: 100%;
    max-width: 600px;
    background: var(--card);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    padding: 15px;
    border: 1px solid var(--border);
    margin: 10px 0;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

h1, h2 {
    color: var(--primary);
    margin: 0;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    padding: 0;
}

.password-box {
    display: flex;
    margin-bottom: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

#password-display {
    flex: 1;
    padding: 12px;
    font-size: 1.1rem;
    border: none;
    background: var(--card);
    color: var(--text);
    font-family: 'Courier New', monospace;
}

.password-actions {
    display: flex;
    background: var(--bg);
}

.password-actions button {
    padding: 0 12px;
    color: var(--text);
    font-size: 1rem;
    transition: color 0.2s;
}

.password-actions button:hover {
    color: var(--primary);
}

.warning-message {
    background-color: rgba(247, 37, 133, 0.1);
    color: var(--danger);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    margin: 5px 0 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.warning-message i {
    color: var(--danger);
}

.strength-meter {
    margin: 15px 0;
}

.strength-bar {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 5px;
}

.strength-fill {
    height: 100%;
    width: 0%;
    background: var(--danger);
    transition: width 0.3s, background-color 0.3s;
}

.password-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 8px;
    margin: 12px 0;
}

.detail-item {
    background: var(--bg);
    padding: 8px;
    border-radius: 6px;
    text-align: center;
}

.detail-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text);
    opacity: 0.8;
    margin-bottom: 3px;
}

.detail-value {
    font-weight: bold;
    font-size: 1rem;
    color: var(--primary);
}

.pronunciation-guide {
    background: var(--bg);
    padding: 10px 12px;
    border-radius: 6px;
    margin: 10px 0;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    overflow: hidden;
}

.pronunciation-guide.hidden {
    opacity: 0;
    height: 0;
    padding: 0;
    margin: 0;
    border: none;
}

.pronunciation-guide i {
    color: var(--primary);
}

.controls {
    margin: 15px 0;
}

.controls label {
    display: block;
    margin-bottom: 5px;
}

#length-slider {
    width: 100%;
    height: 8px;
    accent-color: var(--primary);
    margin-top: 5px;
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin: 15px 0;
}

.option-group {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
}

.option-group legend {
    font-weight: bold;
    padding: 0 5px;
    font-size: 0.9rem;
}

.option-group label {
    display: block;
    margin: 6px 0;
    cursor: pointer;
    font-size: 0.9rem;
}

#generate-button {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: white;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1rem;
    margin: 12px 0;
    transition: background-color 0.2s;
}

#generate-button:hover {
    background-color: var(--secondary);
}

.vault-section {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border);
}

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

.vault-header h2 {
    font-size: 1.2rem;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.collapsible {
    cursor: pointer;
    user-select: none;
}

.toggle-icon {
    transition: transform 0.3s;
    margin-left: 8px;
    font-size: 0.9rem;
}

.collapsed + .vault-list {
    display: none;
}

.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

#clear-vault {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 0.8rem;
    padding: 5px 8px;
    border-radius: 4px;
}

#clear-vault:hover {
    background-color: rgba(247, 37, 133, 0.1);
}

.vault-status {
    text-align: center;
    padding: 8px;
    font-size: 0.9rem;
    color: var(--text);
    opacity: 0.7;
}

.vault-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: max-height 0.3s;
}

.vault-list li {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.vault-list li:last-child {
    border-bottom: none;
}

.vault-entry {
    flex: 1;
}

.vault-entry-name {
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 3px;
    display: block;
    font-size: 0.95rem;
}

.vault-entry-password {
    font-family: 'Courier New', monospace;
    margin: 3px 0;
    cursor: pointer;
    user-select: none;
    font-size: 0.9rem;
}

.vault-entry-date {
    font-size: 0.7rem;
    opacity: 0.6;
}

.vault-entry-actions {
    display: flex;
    gap: 6px;
}

.vault-entry-actions button {
    color: var(--text);
    opacity: 0.6;
    transition: opacity 0.2s;
    background: none;
    border: none;
    padding: 4px;
}

.vault-entry-actions button:hover {
    opacity: 1;
    color: var(--primary);
}

.app-footer {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
    text-align: center;
}

.footer-line {
    display: block;
    width: 100%;
}

.security-disclaimer {
    color: var(--success);
}

.github-link {
    color: var(--primary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
}

.strength-very-weak .strength-fill {
    width: 10%;
    background: var(--danger);
}

.strength-weak .strength-fill {
    width: 20%;
    background: var(--danger);
}

.strength-fair .strength-fill {
    width: 40%;
    background: var(--warning);
}

.strength-good .strength-fill {
    width: 60%;
    background: var(--success);
}

.strength-strong .strength-fill {
    width: 80%;
    background: var(--primary);
}

.strength-excellent .strength-fill {
    width: 100%;
    background: var(--secondary);
}

/* Mobile responsiveness */
@media (max-width: 600px) {
    body {
        padding: 8px;
        align-items: flex-start;
    }
    
    .container {
        padding: 12px;
    }
    
    .password-box {
        margin-bottom: 10px;
    }
    
    .password-actions button {
        padding: 0 10px;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .vault-list {
        max-height: 30vh;
    }
    
    .vault-entry-name {
        font-size: 0.9rem;
    }
    
    .vault-entry-password {
        font-size: 0.85rem;
    }
    
    .app-footer {
        font-size: 0.7rem;
    }
}

@media (max-height: 700px) {
    .container {
        padding: 12px;
    }
    
    .password-details-grid {
        margin: 8px 0;
    }
    
    .vault-section {
        margin-top: 15px;
        padding-top: 12px;
    }
    
    .vault-list {
        max-height: 25vh;
    }
}