/* ========================================
   DESIGN SYSTEM - CSS Variables
   ======================================== */
:root {
    /* Colors - Dark Theme with Vibrant Accents */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a25;
    --color-bg-card: rgba(26, 26, 37, 0.8);
    --color-bg-card-hover: rgba(35, 35, 50, 0.9);
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-active: rgba(255, 255, 255, 0.15);
    
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-tertiary: rgba(255, 255, 255, 0.5);
    --color-text-muted: rgba(255, 255, 255, 0.35);
    
    /* Accent Colors */
    --color-accent-primary: #6366f1;
    --color-accent-primary-hover: #818cf8;
    --color-accent-secondary: #8b5cf6;
    --color-accent-tertiary: #a855f7;
    
    /* Semantic Colors */
    --color-success: #22c55e;
    --color-success-bg: rgba(34, 197, 94, 0.15);
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.15);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.15);
    --color-info: #3b82f6;
    --color-info-bg: rgba(59, 130, 246, 0.15);
    
    /* Metric Card Colors */
    --color-score: #f59e0b;
    --color-conversations: #3b82f6;
    --color-resolution: #22c55e;
    --color-improvements: #a855f7;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
    --gradient-glow: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.15), transparent 70%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Container */
    --container-max-width: 1280px;
    --container-padding: var(--spacing-lg);
}

/* ========================================
   RESET & BASE
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background Gradient Glow */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 60vh;
    background: var(--gradient-glow);
    pointer-events: none;
    z-index: -1;
}

/* ========================================
   UTILITIES
   ======================================== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.hidden {
    display: none !important;
}

/* ========================================
   HEADER
   ======================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

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

.logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    color: white;
    padding: var(--spacing-sm);
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.status-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-warning);
    animation: pulse 2s infinite;
}

.status-badge.connected .status-dot {
    background: var(--color-success);
    animation: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: 1.5;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

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

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

.btn-full {
    width: 100%;
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.main {
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - 200px);
}

/* ========================================
   LOADING STATE
   ======================================== */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl);
    gap: var(--spacing-lg);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* ========================================
   ERROR STATE
   ======================================== */
.error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl);
    gap: var(--spacing-lg);
    text-align: center;
}

.error-icon {
    font-size: 3rem;
}

.error-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-error);
}

.error-message {
    color: var(--color-text-secondary);
    max-width: 400px;
}

/* ========================================
   DASHBOARD
   ======================================== */
.dashboard {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.section-title svg {
    width: 24px;
    height: 24px;
    color: var(--color-accent-primary);
}

/* ========================================
   EXECUTIVE SUMMARY
   ======================================== */
.summary-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.summary-text {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text-secondary);
}

/* ========================================
   METRICS GRID
   ======================================== */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
}

.metric-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.metric-card:hover {
    transform: translateY(-4px);
    background: var(--color-bg-card-hover);
    box-shadow: var(--shadow-lg);
}

.metric-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
}

.metric-icon svg {
    width: 100%;
    height: 100%;
}

.metric-icon.score {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-score);
}

.metric-icon.conversations {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-conversations);
}

.metric-icon.resolution {
    background: rgba(34, 197, 94, 0.15);
    color: var(--color-resolution);
}

.metric-icon.improvements {
    background: rgba(168, 85, 247, 0.15);
    color: var(--color-improvements);
}

.metric-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.metric-value {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-extrabold);
    line-height: 1;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* ========================================
   ACCORDION
   ======================================== */
.accordion {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.accordion-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.accordion-item:hover {
    border-color: var(--color-border-active);
}

.accordion-item.active {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.1);
}

.accordion-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-lg);
    background: none;
    border: none;
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.accordion-header:hover {
    background: rgba(255, 255, 255, 0.03);
}

.accordion-icon {
    font-size: var(--font-size-xl);
}

.accordion-title {
    flex: 1;
    text-align: left;
    font-weight: var(--font-weight-semibold);
}

.accordion-percentage {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-tertiary);
}

.accordion-chevron {
    width: 20px;
    height: 20px;
    color: var(--color-text-tertiary);
    transition: transform var(--transition-base);
}

.accordion-item.active .accordion-chevron {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.accordion-item.active .accordion-content {
    max-height: 2000px;
}

.accordion-body {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.placeholder-text {
    color: var(--color-text-muted);
    font-style: italic;
}

/* Analysis Content Styling */
.analysis-section {
    margin-bottom: var(--spacing-lg);
}

.analysis-section:last-child {
    margin-bottom: 0;
}

.analysis-section h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-sm);
}

.analysis-section ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.analysis-section li {
    position: relative;
    padding-left: var(--spacing-lg);
    color: var(--color-text-secondary);
}

.analysis-section li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent-secondary);
}

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

.recommendation-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.recommendation-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-active);
    box-shadow: var(--shadow-lg);
}

.recommendation-card.placeholder {
    opacity: 0.6;
}

.recommendation-priority {
    display: inline-flex;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    width: fit-content;
}

.recommendation-priority.high {
    background: var(--color-error-bg);
    color: var(--color-error);
}

.recommendation-priority.medium {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.recommendation-priority.low {
    background: var(--color-info-bg);
    color: var(--color-info);
}

.recommendation-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.recommendation-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.recommendation-meta {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.meta-item svg {
    width: 16px;
    height: 16px;
}

/* ========================================
   CONVERSATIONS LIST
   ======================================== */
.conversations-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
}

.conversations-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-height: 500px;
    overflow-y: auto;
    padding-right: var(--spacing-sm);
}

.conversations-list::-webkit-scrollbar {
    width: 6px;
}

.conversations-list::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full);
}

.conversations-list::-webkit-scrollbar-thumb {
    background: var(--color-border-active);
    border-radius: var(--radius-full);
}

.conversation-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.conversation-item:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-active);
}

.conversation-avatar {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.conversation-content {
    flex: 1;
    min-width: 0;
}

.conversation-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.conversation-id {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-time {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.conversation-preview {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ========================================
   MODAL
   ======================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 480px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    color: var(--color-text-tertiary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-xl);
}

.modal-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Analysis Progress */
.analysis-progress {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
}

.progress-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.progress-text {
    color: var(--color-text-secondary);
    text-align: center;
}

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

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.form-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.form-link:hover {
    color: var(--color-accent-primary-hover);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    :root {
        --container-padding: var(--spacing-md);
    }
    
    .header-content {
        flex-wrap: wrap;
    }
    
    .logo-text {
        font-size: var(--font-size-lg);
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .metric-card {
        padding: var(--spacing-lg);
    }
    
    .metric-value {
        font-size: var(--font-size-2xl);
    }
    
    .recommendations-grid {
        grid-template-columns: 1fr;
    }
    
    .accordion-header {
        padding: var(--spacing-md);
    }
    
    .section-title {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    .header-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-xs);
    }
    
    .status-badge {
        font-size: var(--font-size-xs);
    }
}