/* ============================================
   NEXUS AI - Stock Market Analyst
   Design System: Copper & Slate
   ============================================ */

/* CSS Variables - Design Tokens */
:root {
    /* Primary Palette - Copper & Slate */
    --color-primary: #B87333;
    --color-primary-light: #D4A574;
    --color-primary-dark: #8B5A2B;
    --color-accent: #FF6B35;
    
    /* Background Colors */
    --bg-primary: #0F0F0F;
    --bg-secondary: #1A1A1A;
    --bg-tertiary: #252525;
    --bg-elevated: #2A2A2A;
    --bg-hover: #333333;
    
    /* Text Colors */
    --text-primary: #F5F0EB;
    --text-secondary: #B8B0A8;
    --text-tertiary: #8A827A;
    --text-muted: #5A524A;
    
    /* Border Colors */
    --border-primary: #3C3C3C;
    --border-secondary: #2A2A2A;
    
    /* Status Colors */
    --color-success: #22C55E;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-info: #3B82F6;
    
    /* Typography */
    --font-display: 'Clash Display', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(184, 115, 51, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Layout */
    --sidebar-width: 280px;
    --header-height: 64px;
    --input-height: 140px;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

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

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-secondary);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform var(--transition-base);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
}

.logo-icon svg {
    width: 20px;
    height: 20px;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--text-primary), var(--color-primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.new-chat-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.new-chat-btn:hover {
    background: var(--bg-hover);
    border-color: var(--color-primary);
}

.new-chat-btn svg {
    width: 18px;
    height: 18px;
}

/* Chat History */
.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
}

.history-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-xs);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.history-item.active {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
}

.history-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.history-item span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--bg-primary);
}

.user-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--bg-primary);
}

/* Header */
.main-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
    border-bottom: 1px solid var(--border-secondary);
    background: var(--bg-primary);
}

.model-selector {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.model-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.model-select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition-fast);
}

.model-select:hover,
.model-select:focus {
    border-color: var(--color-primary);
}

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

.icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-primary);
    color: var(--text-primary);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
}

/* ============================================
   CHAT CONTAINER
   ============================================ */
.chat-container {
    flex: 1;
    overflow-y: auto;
    position: relative;
}

/* Welcome Screen */
.welcome-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    padding: var(--space-3xl);
}

.welcome-content {
    text-align: center;
    max-width: 800px;
    animation: fadeInUp 0.6s ease;
}

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

.welcome-title {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light), var(--text-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.welcome-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-3xl);
    font-weight: 400;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
}

.feature-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
}

.feature-card:hover {
    background: var(--bg-tertiary);
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-card span {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Messages Area */
.messages-area {
    display: flex;
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-lg);
}

/* Message Bubbles */
.message {
    display: flex;
    gap: var(--space-md);
    max-width: 85%;
    animation: messageSlide 0.3s ease;
}

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

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.assistant {
    align-self: flex-start;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 600;
    font-size: 0.85rem;
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--bg-primary);
}

.message.assistant .message-avatar {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--color-primary);
}

.message-content {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    line-height: 1.7;
}

.message.user .message-content {
    background: var(--color-primary);
    color: var(--bg-primary);
    border-bottom-right-radius: var(--radius-sm);
}

.message.assistant .message-content {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    border-bottom-left-radius: var(--radius-sm);
}

/* Message Attachments */
.message-attachment {
    margin-top: var(--space-md);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.message-attachment img {
    max-width: 300px;
    max-height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.message-attachment video {
    max-width: 300px;
    border-radius: var(--radius-md);
}

.message-attachment audio {
    width: 250px;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: var(--space-md) var(--space-lg);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typingBounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

/* ============================================
   INPUT CONTAINER
   ============================================ */
.input-container {
    padding: var(--space-lg) var(--space-xl);
    background: var(--bg-primary);
    border-top: 1px solid var(--border-secondary);
}

.input-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.input-toolbar {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
    padding: 0 var(--space-xs);
}

.toolbar-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-tertiary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toolbar-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-primary);
    color: var(--text-primary);
}

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

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--border-primary);
    margin: 0 var(--space-xs);
}

.input-field-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--space-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-md);
    transition: border-color var(--transition-fast);
}

.input-field-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.message-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    resize: none;
    min-height: 24px;
    max-height: 200px;
    line-height: 1.6;
}

.message-input::placeholder {
    color: var(--text-tertiary);
}

.send-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-md);
    color: var(--bg-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
    background: var(--color-primary-light);
    transform: scale(1.05);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.send-btn svg {
    width: 20px;
    height: 20px;
}

.input-footer {
    text-align: center;
    margin-top: var(--space-sm);
}

.disclaimer {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ============================================
   MODALS
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

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

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    min-width: 400px;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

/* Recording Modal */
.recording-modal {
    text-align: center;
    padding: var(--space-3xl);
}

.recording-indicator {
    margin-bottom: var(--space-2xl);
}

.recording-waves {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-bottom: var(--space-lg);
    height: 60px;
}

.recording-waves span {
    width: 6px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    animation: soundWave 1s ease-in-out infinite;
}

.recording-waves span:nth-child(1) { height: 20px; animation-delay: 0s; }
.recording-waves span:nth-child(2) { height: 35px; animation-delay: 0.1s; }
.recording-waves span:nth-child(3) { height: 50px; animation-delay: 0.2s; }
.recording-waves span:nth-child(4) { height: 35px; animation-delay: 0.3s; }
.recording-waves span:nth-child(5) { height: 20px; animation-delay: 0.4s; }

@keyframes soundWave {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(1.5); }
}

.recording-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.recording-timer {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-display);
}

.recording-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

.btn-primary,
.btn-secondary {
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
}

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

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

/* Market Search Modal */
.market-search-modal {
    width: 500px;
}

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

.modal-header h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
}

.close-modal {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.close-modal svg {
    width: 20px;
    height: 20px;
}

.search-box {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
}

.search-box svg {
    width: 20px;
    height: 20px;
    color: var(--text-tertiary);
}

.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
}

.search-box input::placeholder {
    color: var(--text-tertiary);
}

.search-results {
    max-height: 400px;
    overflow-y: auto;
}

.result-category h4 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-secondary);
}

.result-item {
    display: grid;
    grid-template-columns: 60px 1fr 80px 70px;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-xs);
}

.result-item:hover {
    background: var(--bg-tertiary);
}

.result-symbol {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.result-name {
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-price {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: right;
}

.result-change {
    font-size: 0.85rem;
    font-weight: 600;
    text-align: right;
}

.result-change.positive {
    color: var(--color-success);
}

.result-change.negative {
    color: var(--color-error);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 100;
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .welcome-title {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .main-header {
        padding: 0 var(--space-md);
    }
    
    .input-container {
        padding: var(--space-md);
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .welcome-title {
        font-size: 2.5rem;
    }
    
    .message {
        max-width: 95%;
    }
    
    .result-item {
        grid-template-columns: 50px 1fr 70px;
    }
    
    .result-name {
        display: none;
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.loading-shimmer {
    background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-hover) 50%, var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

/* Code blocks in messages */
.message-content pre {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    overflow-x: auto;
    margin: var(--space-md) 0;
}

.message-content code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--color-primary-light);
}

.message-content p {
    margin-bottom: var(--space-sm);
}

.message-content p:last-child {
    margin-bottom: 0;
}

/* Stock data cards in messages */
.stock-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin: var(--space-md) 0;
}

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

.stock-symbol {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stock-price {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stock-change {
    font-size: 0.9rem;
    font-weight: 500;
}

.stock-chart {
    height: 120px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-top: var(--space-md);
}