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

:root {
    /* Colors */
    --primary: #7c3aed;
    --primary-hover: #6d28d9;
    --secondary: #a78bfa;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    
    /* Dark theme */
    --bg-primary: #0f0d1e;
    --bg-secondary: #1e1b4b;
    --bg-card: rgba(76, 29, 149, 0.2);
    --border: rgba(167, 139, 250, 0.2);
    
    /* Text */
    --text-primary: #e0e7ff;
    --text-secondary: #a5b4fc;
    --text-muted: #6b7280;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, #312e81 100%);
    color: var(--text-primary);
    min-height: 100vh;
}

/* App Container */
.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: rgba(15, 13, 30, 0.9);
    backdrop-filter: blur(10px);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: var(--spacing-lg) var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.app-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #a78bfa 0%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.25rem;
}

.app-tagline {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md) 0;
}

.nav-item {
    display: flex;
    align-items: center;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.nav-item:hover {
    background: rgba(167, 139, 250, 0.1);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(124, 58, 237, 0.2);
    color: var(--secondary);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--secondary);
}

.nav-icon {
    font-size: 1.2rem;
    margin-right: var(--spacing-sm);
}

.nav-label {
    flex: 1;
    text-align: left;
}

.nav-badge {
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 10px;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.energy-meter {
    margin-bottom: var(--spacing-md);
}

.energy-meter label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.energy-bar {
    height: 8px;
    background: rgba(76, 29, 149, 0.3);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.energy-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--danger) 0%, var(--warning) 50%, var(--success) 100%);
    transition: width 0.3s ease;
}

.energy-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.logout-btn {
    width: 100%;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

/* Panels */
.panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.panel-header {
    margin-bottom: var(--spacing-lg);
}

.panel-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.panel-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.panel-header .btn {
    float: right;
    margin-top: -2.5rem;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--secondary);
    font-weight: 500;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--secondary);
    background: rgba(76, 29, 149, 0.3);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
    font-family: inherit;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(124, 58, 237, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--secondary);
    color: var(--secondary);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #34d399 100%);
    color: white;
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger);
}

/* Translation Result */
.translation-result {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.preservation-meter {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.preservation-bar {
    width: 150px;
    height: 8px;
    background: rgba(76, 29, 149, 0.3);
    border-radius: 4px;
    overflow: hidden;
}

.preservation-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--danger) 0%, var(--warning) 50%, var(--success) 100%);
    transition: width 0.5s ease;
}

.message-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.message-card {
    padding: var(--spacing-md);
    background: rgba(30, 27, 75, 0.5);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.message-card.original {
    border-left: 3px solid var(--secondary);
}

.message-card.translated {
    border-left: 3px solid var(--success);
}

.message-card h4 {
    color: var(--secondary);
    margin-bottom: var(--spacing-sm);
}

.message-text {
    color: var(--text-primary);
    line-height: 1.6;
    white-space: pre-wrap;
}

.result-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Items Grid */
.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.item-card {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.item-card:hover {
    transform: translateY(-2px);
    border-color: var(--secondary);
}

.item-card h3 {
    color: var(--secondary);
    margin-bottom: var(--spacing-sm);
}

.item-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

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

/* Archive List */
.archive-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.archive-item {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.archive-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.archive-meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.archive-preview {
    color: var(--text-primary);
    line-height: 1.5;
}

/* Insights */
.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.insight-card {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-align: center;
}

.insight-card h3 {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.insight-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--success) 0%, #34d399 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-sm);
}

.insight-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: var(--spacing-xl);
}

/* Loading */
.loading {
    display: inline-block;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Add Form */
.add-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.add-form h3 {
    color: var(--secondary);
    margin-bottom: var(--spacing-md);
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    
    .sidebar-nav {
        display: flex;
        overflow-x: auto;
        padding: var(--spacing-sm);
    }
    
    .nav-item {
        flex-direction: column;
        padding: var(--spacing-sm);
        min-width: 80px;
    }
    
    .nav-label {
        font-size: 0.75rem;
        text-align: center;
    }
    
    .nav-icon {
        margin-right: 0;
        margin-bottom: 0.25rem;
    }
    
    .sidebar-footer {
        display: none;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .message-comparison {
        grid-template-columns: 1fr;
    }
}