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

:root {
    /* Cores principais com melhor contraste */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    
    --secondary-color: #64748b;
    --secondary-dark: #475569;
    --secondary-light: #94a3b8;
    
    --success-color: #059669;
    --success-dark: #047857;
    --success-light: #10b981;
    
    --warning-color: #d97706;
    --warning-dark: #b45309;
    --warning-light: #f59e0b;
    
    --danger-color: #dc2626;
    --danger-dark: #b91c1c;
    --danger-light: #ef4444;
    
    --info-color: #0891b2;
    --info-dark: #0e7490;
    --info-light: #06b6d4;
    
    /* Cores de texto com alto contraste */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-light: #f8fafc;
    
    /* Cores de fundo */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #1e293b;
    --bg-darker: #0f172a;
    
    /* Cores de borda */
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    --border-dark: #94a3b8;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Espaçamentos */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    padding-bottom: 80px;
    min-height: 100vh;
    font-size: 16px;
}

/* Header Styles */
.app-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-light);
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-xl);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 3px solid rgba(255, 255, 255, 0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-content h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-light);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-content h1::before {
   
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

.header-controls {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.lang-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--text-light);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 30px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all 0.3s ease;
    font-size: 0.95rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.lang-btn i {
    font-size: 1.1rem;
}

/* Header responsive */
@media (max-width: 768px) {
    .header-content h1 {
        font-size: 1.4rem;
    }
    
    .header-content h1::before {
        font-size: 1.6rem;
    }
    
    .lang-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: var(--spacing-md) 0;
    }
    
    .header-content h1 {
        font-size: 1.2rem;
    }
    
    .header-content h1::before {
        font-size: 1.4rem;
    }
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* Content Sections */
.content-section {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.section-header h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    font-weight: 700;
}

/* Button Styles */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--text-light);
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

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

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

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

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

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

.btn-success:hover {
    background: linear-gradient(135deg, var(--success-light) 0%, var(--success-color) 100%);
}

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

.btn-warning:hover {
    background: linear-gradient(135deg, var(--warning-light) 0%, var(--warning-color) 100%);
}

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

.btn-danger:hover {
    background: linear-gradient(135deg, var(--danger-light) 0%, var(--danger-color) 100%);
}

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

.btn-info:hover {
    background: linear-gradient(135deg, var(--info-light) 0%, var(--info-color) 100%);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-light);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.stat-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    color: var(--text-light);
    box-shadow: var(--shadow-sm);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-light);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.service-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.service-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-light);
    box-shadow: var(--shadow-sm);
}

.service-icon.google-drive { 
    background: linear-gradient(135deg, #4285f4 0%, #1a73e8 100%); 
}
.service-icon.dropbox { 
    background: linear-gradient(135deg, #0061ff 0%, #0047cc 100%); 
}
.service-icon.onedrive { 
    background: linear-gradient(135deg, #0078d4 0%, #106ebe 100%); 
}
.service-icon.icloud { 
    background: linear-gradient(135deg, #007aff 0%, #0051d5 100%); 
}
.service-icon.box { 
    background: linear-gradient(135deg, #0061d5 0%, #0047a3 100%); 
}

.service-info h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.service-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.status-synced { 
    background: var(--success-color); 
    box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.2);
}
.status-syncing { 
    background: var(--warning-color); 
    box-shadow: 0 0 0 2px rgba(217, 119, 6, 0.2);
}
.status-error { 
    background: var(--danger-color); 
    box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.2);
}
.status-paused { 
    background: var(--secondary-color); 
    box-shadow: 0 0 0 2px rgba(100, 116, 139, 0.2);
}

.service-details {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-light);
}

.service-detail {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.service-detail span:first-child {
    font-weight: 500;
    color: var(--text-primary);
}

.service-actions {
    margin-top: var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.8rem;
}

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

.service-item {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-light);
}

.service-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.service-item-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.service-item-info h3 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.service-item-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

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

.conflict-item {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--danger-color);
    border: 1px solid var(--border-light);
    border-left: 4px solid var(--danger-color);
}

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

.conflict-file {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.conflict-details-summary {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

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

/* Storage Overview */
.storage-overview {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.storage-chart {
    display: flex;
    justify-content: center;
    align-items: center;
}

.storage-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.storage-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
}

.storage-item-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.storage-item-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: var(--text-light);
    box-shadow: var(--shadow-sm);
}

.storage-item span {
    color: var(--text-primary);
    font-weight: 500;
}

.optimization-suggestions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.suggestion-card {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.suggestion-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.suggestion-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-light);
    background: linear-gradient(135deg, var(--success-color) 0%, var(--success-dark) 100%);
    box-shadow: var(--shadow-sm);
}

.suggestion-card h3 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.suggestion-card p {
    color: var(--text-secondary);
    line-height: 1.5;
}

.suggestion-card strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Backup Status */
.backup-status {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.backup-item {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

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

.backup-service {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.backup-status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.backup-details {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.backup-details div {
    margin-bottom: var(--spacing-xs);
}

.backup-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-xl);
}

/* FAQ Styles */
.faq-container {
    max-width: 800px;
}

.faq-item {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border: 1px solid var(--border-light);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-lg);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background: var(--bg-secondary);
}

.faq-question[aria-expanded="true"] {
    background: var(--bg-tertiary);
}

.faq-icon {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    animation: slideDown 0.3s ease;
}

.faq-answer[hidden] {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
        padding-bottom: 0;
    }
    to {
        opacity: 1;
        max-height: 200px;
        padding-bottom: var(--spacing-lg);
    }
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
}

.modal-header h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Form Styles */
.form-group {
    margin-bottom: var(--spacing-lg);
    padding: 0 var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    min-width: 60px;
}

.nav-item:hover,
.nav-item.active {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
}

.nav-item i {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 600;
}

/* Footer */
footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    margin-top: var(--spacing-2xl);
    border-top: 2px solid var(--border-light);
    position: relative;
}

footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color), var(--warning-color));
    border-radius: 0 0 3px 3px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.footer-brand i {
    color: var(--primary-color);
    font-size: 1.3rem;
}

.footer-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    position: relative;
}

.footer-link:hover {
    color: var(--primary-dark);
    background: rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

.footer-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.footer-link:hover::after {
    width: 100%;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Footer responsive */
@media (max-width: 768px) {
    footer {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .footer-content {
        gap: var(--spacing-sm);
    }
    
    .footer-brand {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    footer {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .footer-brand {
        font-size: 0.9rem;
    }
    
    .footer-text {
        font-size: 0.8rem;
    }
}

/* Loading States */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: var(--spacing-sm);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.7;
}

.empty-state h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 600;
}

.empty-state p {
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Notification Styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 10000;
    max-width: 300px;
    word-wrap: break-word;
    animation: slideInRight 0.3s ease;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.notification-success {
    background: linear-gradient(135deg, var(--success-color) 0%, var(--success-dark) 100%);
    color: var(--text-light);
}

.notification-error {
    background: linear-gradient(135deg, var(--danger-color) 0%, var(--danger-dark) 100%);
    color: var(--text-light);
}

.notification-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, var(--warning-dark) 100%);
    color: var(--text-light);
}

.notification-info {
    background: linear-gradient(135deg, var(--info-color) 0%, var(--info-dark) 100%);
    color: var(--text-light);
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content h1 {
        font-size: 1.3rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .storage-overview {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .optimization-suggestions {
        grid-template-columns: 1fr;
    }
    
    .backup-status {
        grid-template-columns: 1fr;
    }
    
    .service-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .service-item-actions {
        width: 100%;
        justify-content: flex-end;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .backup-actions {
        flex-direction: column;
    }
    
    .nav-item span {
        font-size: 0.6rem;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .service-card,
    .conflict-item,
    .suggestion-card,
    .backup-item {
        padding: var(--spacing-md);
    }
    
    .modal-content {
        width: 95%;
        margin: var(--spacing-md);
    }
    
    .bottom-nav {
        padding: var(--spacing-xs) 0;
    }
    
    .nav-item {
        padding: var(--spacing-xs);
        min-width: 50px;
    }
    
    .nav-item i {
        font-size: 1rem;
    }
    
    .nav-item span {
        font-size: 0.55rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn {
        border: 2px solid currentColor;
    }
    
    .service-card,
    .conflict-item,
    .suggestion-card,
    .backup-item {
        border: 2px solid var(--text-primary);
    }
    
    .stat-card {
        border: 2px solid var(--text-primary);
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;
        --text-light: #1e293b;
        
        --bg-primary: #1e293b;
        --bg-secondary: #334155;
        --bg-tertiary: #475569;
        --bg-dark: #0f172a;
        --bg-darker: #020617;
        
        --border-light: #475569;
        --border-medium: #64748b;
        --border-dark: #94a3b8;
    }
    
    body {
        background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
        color: var(--text-primary);
    }
    
    .app-header {
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
        border-bottom-color: rgba(255, 255, 255, 0.2);
    }
    
    .service-card,
    .conflict-item,
    .suggestion-card,
    .backup-item,
    .stat-card,
    .storage-overview,
    .modal-content,
    .faq-item {
        background: var(--bg-primary);
        color: var(--text-primary);
        border-color: var(--border-light);
    }
    
    .bottom-nav {
        background: var(--bg-primary);
        border-top-color: var(--border-light);
    }
    
    footer {
        background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
        color: var(--text-secondary);
        border-top-color: var(--border-light);
    }
    
    .footer-brand {
        color: var(--text-primary);
    }
    
    .footer-link {
        color: var(--primary-light);
    }
    
    .footer-link:hover {
        color: var(--primary-color);
        background: rgba(37, 99, 235, 0.2);
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        background: var(--bg-primary);
        color: var(--text-primary);
        border-color: var(--border-light);
    }
    
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
    }
}

/* Focus styles for accessibility */
.btn:focus,
.nav-item:focus,
.modal-close:focus,
.faq-question:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .bottom-nav,
    .app-header,
    .btn,
    .modal {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .service-card,
    .conflict-item,
    .suggestion-card,
    .backup-item,
    .stat-card {
        background: white !important;
        color: black !important;
        border: 1px solid #ccc !important;
        box-shadow: none !important;
    }
}