/* Reset e base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #1a202c;
    line-height: 1.6;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-spinner {
    text-align: center;
    color: white;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: white;
    border-radius: 16px;
    padding: 40px;
    width: 90%;
    max-width: 450px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    text-align: center;
    margin-bottom: 30px;
}

.modal-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 8px;
}

.modal-header p {
    color: #64748b;
    font-size: 16px;
}

/* Form Styles */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 500;
    margin-bottom: 8px;
    color: #374151;
}

.form-group input {
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.2s ease;
    background: #f9fafb;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
    margin-top: 4px;
    color: #6b7280;
    font-size: 14px;
}

/* Button Styles */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-ghost {
    background: transparent;
    color: #6b7280;
    border: 1px solid #e5e7eb;
}

.btn-ghost:hover {
    background: #f3f4f6;
    color: #374151;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.auth-switch {
    text-align: center;
    margin-top: 20px;
    color: #6b7280;
}

.auth-switch a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* Dashboard Layout */
.dashboard {
    display: grid;
    grid-template-columns: 280px 1fr;
    height: 100vh;
    background: #f8fafc;
}

/* Sidebar */
.sidebar {
    background: white;
    border-right: 1px solid #e5e7eb;
    display: flex;
    flex-direction: column;
    box-shadow: 4px 0 6px rgba(0, 0, 0, 0.05);
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid #e5e7eb;
}

.sidebar-header h1 {
    font-size: 20px;
    font-weight: 700;
    color: #667eea;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: #6b7280;
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: #f3f4f6;
    color: #374151;
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.1) 0%, transparent 100%);
    color: #667eea;
    border-left-color: #667eea;
    font-weight: 500;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid #e5e7eb;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.user-details {
    flex: 1;
}

.user-details span {
    display: block;
    font-weight: 500;
    color: #374151;
}

.user-details small {
    color: #6b7280;
    font-size: 12px;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.content-header {
    background: white;
    padding: 24px 32px;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.header-left h2 {
    font-size: 28px;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 4px;
}

.header-left p {
    color: #6b7280;
    font-size: 16px;
}

.header-stats {
    display: flex;
    gap: 32px;
}

.stat-item {
    text-align: right;
}

.stat-label {
    display: block;
    font-size: 14px;
    color: #6b7280;
    margin-bottom: 4px;
}

.stat-value {
    display: block;
    font-size: 20px;
    font-weight: 600;
    color: #1a202c;
}

.content-body {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
    background: #f8fafc;
}

/* Content Sections */
.content-section {
    display: none;
}

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

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.section-header h3 {
    font-size: 24px;
    font-weight: 600;
    color: #1a202c;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.2s ease;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.card-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3,
.card-header h4 {
    font-size: 18px;
    font-weight: 600;
    color: #1a202c;
}

.card-header i {
    color: #667eea;
    font-size: 20px;
}

.card-body {
    padding: 20px 24px 24px;
}

/* Metric Cards */
.metric-card .card-body {
    text-align: center;
}

.metric-value {
    font-size: 36px;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 8px;
}

.metric-change {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
}

.metric-change.positive {
    color: #059669;
}

.metric-change.negative {
    color: #dc2626;
}

.metric-change.neutral {
    color: #6b7280;
}

.metric-subtitle {
    color: #6b7280;
    font-size: 14px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #f1f5f9;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Feature Stats */
.feature-stats {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feature-stat {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.feature-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.feature-info i {
    width: 20px;
    color: #667eea;
}

.feature-usage {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 120px;
}

.usage-count {
    font-weight: 600;
    color: #1a202c;
    min-width: 50px;
    text-align: right;
}

.usage-bar {
    width: 60px;
    height: 6px;
    background: #f1f5f9;
    border-radius: 3px;
    overflow: hidden;
}

.usage-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 3px;
}

/* Chart Card */
.chart-card {
    grid-column: 1 / -1;
}

.chart-controls {
    display: flex;
    gap: 8px;
}

.chart-controls .btn {
    background: #f1f5f9;
    color: #6b7280;
    border: none;
}

.chart-controls .btn.active {
    background: #667eea;
    color: white;
}

/* Settings */
.settings-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 32px;
    border-bottom: 1px solid #e5e7eb;
}

.tab-btn {
    padding: 16px 24px;
    background: none;
    border: none;
    font-size: 16px;
    font-weight: 500;
    color: #6b7280;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

.tab-content {
    display: none;
}

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

.settings-form {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Checkbox Styles */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-weight: 500;
    color: #374151;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #d1d5db;
    border-radius: 4px;
    position: relative;
    transition: all 0.2s ease;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: #667eea;
    border-color: #667eea;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

/* Notification Toast */
.notification-toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1000;
    transform: translateX(400px);
    transition: transform 0.3s ease;
}

.notification-toast.show {
    transform: translateX(0);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.toast-icon {
    font-size: 18px;
}

.toast-icon.success {
    color: #059669;
}

.toast-icon.error {
    color: #dc2626;
}

.toast-icon.info {
    color: #0284c7;
}

.toast-message {
    font-weight: 500;
    color: #374151;
}

.toast-close {
    background: none;
    border: none;
    color: #6b7280;
    cursor: pointer;
    padding: 4px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: fixed;
        top: 0;
        left: -280px;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .content-header {
        padding: 16px 20px;
    }
    
    .content-body {
        padding: 20px;
    }
    
    .header-stats {
        display: none;
    }
}

@media (max-width: 640px) {
    .modal-content {
        padding: 24px;
        margin: 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .settings-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        padding: 12px 16px;
        font-size: 14px;
    }
}

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

.content-section.active {
    animation: fadeIn 0.3s ease;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mb-0 {
    margin-bottom: 0 !important;
}

.mt-4 {
    margin-top: 16px;
}

.p-4 {
    padding: 16px;
}