static/style.css

/* ============================================
   PROFESSIONAL PROJECT SAMARTH STYLES
   ============================================ */

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

:root {
    /* Primary Colors */
    --primary: #10b981;
    --primary-dark: #059669;
    --primary-light: #d1fae5;
    
    /* Accent Colors */
    --accent: #3b82f6;
    --accent-dark: #2563eb;
    --accent-light: #dbeafe;
    
    /* Neutral Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --border-dark: #d1d5db;
    
    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition: all 0.2s ease;
    
    /* Layout Heights */
    --nav-height: 73px;
    --input-section-height: 140px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* === TOP NAVIGATION === */
.top-nav {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-height);
    backdrop-filter: blur(10px);
}

.nav-content {
    max-width: 100%;
    height: 100%;
    padding: 0 var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-icon {
    font-size: 2rem;
    animation: gentle-bounce 3s ease-in-out infinite;
}

@keyframes gentle-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0;
    line-height: 1.2;
}

.tagline {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

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

.system-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.status-text {
    color: var(--primary-dark);
}

.btn-icon {
    background: var(--bg-tertiary);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.25rem;
}

.btn-icon:hover {
    background: var(--border-dark);
    transform: translateY(-1px);
}

/* === MAIN CONTAINER === */
.main-container {
    display: grid;
    grid-template-columns: 300px 1fr 320px;
    gap: 0;
    margin-top: var(--nav-height);
    height: calc(100vh - var(--nav-height));
    overflow: hidden;
}

/* === SIDEBAR STYLES === */
.sidebar {
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition);
    border-right: 1px solid var(--border);
    height: 100%;
}

.right-sidebar {
    border-right: none;
    border-left: 1px solid var(--border);
}

.sidebar.collapsed {
    width: 0 !important;
    min-width: 0;
    border: none;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.sidebar-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.collapse-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    font-size: 1rem;
    transition: var(--transition);
    border-radius: var(--radius-sm);
}

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

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

/* === EXAMPLES GRID === */
.examples-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.example-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    display: flex;
    gap: var(--spacing-md);
    align-items: start;
}

.example-card:hover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.example-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.example-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.example-card:hover .example-text {
    color: var(--text-primary);
}

/* === CHAT AREA === */
.chat-area {
    display: flex;
    flex-direction: column;
    background: var(--bg-tertiary);
    position: relative;
    height: 100%;
    overflow: hidden;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-xl);
    padding-bottom: calc(var(--spacing-xl) + 40px); /* Increased bottom padding */
    scroll-behavior: smooth;
    height: calc(100vh - var(--nav-height) - var(--input-section-height));
}

/* === WELCOME SCREEN === */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100%;
    text-align: center;
    padding: var(--spacing-xl);
    padding-top: calc(var(--spacing-xl) * 2);
}

.welcome-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    animation: wave 2s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(20deg); }
    75% { transform: rotate(-20deg); }
}

.welcome-screen h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.welcome-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.feature-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.pill {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.welcome-prompt {
    max-width: 600px;
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 60px;  /* Add this line */
    padding-bottom: 20px; /* Add this line */
}

/* === MESSAGES === */
.message {
    margin-bottom: var(--spacing-xl);
    animation: slideUp 0.3s ease-out;
}

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

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

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 600;
}

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

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

.message-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.message-content {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.message.user .message-content {
    background: var(--accent-light);
    border-color: var(--accent);
}

/* === INPUT SECTION - FIXED AT BOTTOM === */
.input-section {
    position: fixed;
    bottom: 0;
    left: 300px;
    right: 320px;
    height: var(--input-section-height);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    z-index: 10;
    flex-shrink: 0;
}

.input-wrapper {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md);
    transition: var(--transition);
}

.input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

#questionInput {
    flex: 1;
    border: none;
    background: transparent;
    font-family: inherit;
    font-size: 0.9375rem;
    color: var(--text-primary);
    resize: none;
    outline: none;
    max-height: 120px;
    line-height: 1.5;
}

#questionInput::placeholder {
    color: var(--text-secondary);
}

.send-button {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.send-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.send-icon {
    color: white;
    font-size: 1.25rem;
    font-weight: bold;
}

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

.hint {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* === INFO SECTIONS === */
.info-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border);
}

.info-section-header {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
}

.info-icon {
    font-size: 1.25rem;
}

.info-section-header h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.info-content {
    padding: var(--spacing-md);
    max-height: 300px;
    overflow-y: auto;
}

.placeholder-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.placeholder-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.5;
}

.placeholder-state p {
    font-size: 0.875rem;
}

/* Pipeline Items */
.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
}

/* Source Items */
.source-item {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-left: 3px solid var(--primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    transition: var(--transition);
}

.source-item:hover {
    border-left-color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.source-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.source-category {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.source-id {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    margin-top: var(--spacing-xs);
    opacity: 0.7;
}

/* === LOADING STATE === */
.loading {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    animation: slideUp 0.3s ease-out;
}

.loading::before {
    content: '';
    width: 20px;
    height: 20px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* === MARKDOWN STYLING === */
.message-content h1,
.message-content h2,
.message-content h3 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    color: var(--text-primary);
}

.message-content h2 {
    font-size: 1.25rem;
    border-bottom: 2px solid var(--border);
    padding-bottom: var(--spacing-sm);
}

.message-content p {
    margin: var(--spacing-md) 0;
    line-height: 1.7;
}

.message-content strong {
    font-weight: 600;
    color: var(--primary-dark);
}

.message-content ul,
.message-content ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.message-content li {
    margin: var(--spacing-sm) 0;
}

.message-content code {
    background: var(--bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
}

.message-content pre {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    overflow-x: auto;
    margin: var(--spacing-md) 0;
}

.message-content pre code {
    background: none;
    padding: 0;
}

/* === SCROLLBAR === */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-dark);
    border-radius: var(--radius-md);
}

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

/* === RESPONSIVE === */
@media (max-width: 1400px) {
    .main-container {
        grid-template-columns: 280px 1fr 300px;
    }
    
    .input-section {
        left: 280px;
        right: 300px;
    }
}

@media (max-width: 1200px) {
    .main-container {
        grid-template-columns: 260px 1fr 280px;
    }
    
    .input-section {
        left: 260px;
        right: 280px;
    }
}

@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
    }
    
    .input-section {
        left: 0;
        right: 0;
    }
    
    .left-sidebar,
    .right-sidebar {
        position: fixed;
        top: var(--nav-height);
        height: calc(100vh - var(--nav-height));
        z-index: 90;
        box-shadow: var(--shadow-xl);
    }
    
    .left-sidebar {
        left: -300px;
        width: 300px;
    }
    
    .left-sidebar.open {
        left: 0;
    }
    
    .right-sidebar {
        right: -320px;
        width: 320px;
    }
    
    .right-sidebar.open {
        right: 0;
    }
}

@media (max-width: 768px) {
    .nav-content {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .logo-text h1 {
        font-size: 1.25rem;
    }
    
    .tagline {
        display: none;
    }
    
    .messages-container {
        padding: var(--spacing-md);
    }
    
    .input-section {
        padding: var(--spacing-md);
    }
}