/* ============================================================================
   AGENTIC AI - PROFESSIONAL UI BY PUVINTHAR STEPHEN
   Modern, Innovative, ChatGPT-Inspired Design
   ============================================================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #8b5cf6;
    --accent: #ec4899;
    
    /* Dark Theme */
    --bg-primary: #0f0f0f;
    --bg-secondary: #171717;
    --bg-tertiary: #1f1f1f;
    --bg-hover: #2a2a2a;
    --bg-card: #262626;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --text-tertiary: #737373;
    
    /* Borders */
    --border-color: #2a2a2a;
    --border-hover: #404040;
    
    /* Status Colors */
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #ec4899 0%, #f43f5e 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    
    /* Transitions */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f5;
    --bg-hover: #e9ecef;
    --bg-card: #ffffff;
    
    --text-primary: #1a1a1a;
    --text-secondary: #6c757d;
    --text-tertiary: #9ca3af;
    
    --border-color: #e5e7eb;
    --border-hover: #d1d5db;
    
    --shadow-sm: 0 1px 2px 0 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);
}

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================================================
   LAYOUT
   ============================================================================ */

.app-container {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* ============================================================================
   SIDEBAR
   ============================================================================ */

.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.brand-container {
    margin-bottom: 16px;
}

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

.logo {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 1px;
    color: white;
    box-shadow: var(--shadow-md);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.developer-name {
    font-size: 11px;
    color: var(--text-tertiary);
    font-weight: 400;
}

.new-chat-btn {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition);
}

.new-chat-btn:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

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

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.section-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    padding: 0 8px;
}

.chat-history {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-item {
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

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

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.status-container {
    margin-bottom: 12px;
}

.backend-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
}

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

.backend-status.online .status-indicator {
    background-color: var(--success);
}

.backend-status.offline .status-indicator {
    background-color: var(--error);
}

.status-text {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.developer-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.badge-text {
    letter-spacing: 0.3px;
}

/* Theme Toggle Notification */
.theme-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 12px 20px;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    z-index: 10000;
    animation: slideInRight 0.3s ease-out;
}

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

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

/* ============================================================================
   MAIN CONTAINER
   ============================================================================ */

.main-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
}

/* ============================================================================
   HEADER
   ============================================================================ */

.app-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--bg-secondary);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-title {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-btn {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

/* ============================================================================
   CHAT DISPLAY
   ============================================================================ */

.chat-display {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
}

/* Welcome Screen */
.welcome-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
}

.welcome-content {
    text-align: center;
    animation: fadeIn 0.6s ease-out;
}

.welcome-logo {
    margin-bottom: 24px;
}

.logo-circle {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 32px;
    letter-spacing: 2px;
    color: white;
    box-shadow: var(--shadow-xl);
    margin: 0 auto;
}

.welcome-heading {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -1px;
    color: var(--text-primary);
}

.welcome-subtext {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.capability-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.capability-card {
    padding: 20px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: flex-start;
    gap: 12px;
    text-align: left;
}

.capability-card:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.card-desc {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* Message Container */
.message-container {
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
    padding: 0 16px;
}

/* Message Row */
.message {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    margin-bottom: 16px;
    animation: slideUp 0.3s ease-out;
}

.message.user {
    justify-content: flex-end;
}

.message.assistant {
    justify-content: flex-start;
}

/* Avatar Icons */
.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.message.user .message-avatar {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

/* Message Bubbles (WhatsApp Style) */
.message-bubble {
    max-width: 65%;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.6;
    word-wrap: break-word;
    position: relative;
    box-shadow: var(--shadow-sm);
}

/* User Messages (Right side, blue) */
.message.user .message-bubble {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.user .message-bubble::before {
    content: '';
    position: absolute;
    right: -8px;
    bottom: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 0 16px 12px;
    border-color: transparent transparent #8b5cf6 transparent;
}

/* Assistant Messages (Left side, gray/card color) */
.message.assistant .message-bubble {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

.message.assistant .message-bubble::before {
    content: '';
    position: absolute;
    left: -8px;
    bottom: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 12px 16px 0;
    border-color: transparent var(--bg-card) transparent transparent;
}

/* Light theme tail adjustment */
[data-theme="light"] .message.assistant .message-bubble::before {
    border-color: transparent #ffffff transparent transparent;
}

/* Message content formatting */
.message-bubble strong {
    font-weight: 600;
}

.message-bubble em {
    font-style: italic;
    opacity: 0.9;
}

/* Loading Animation */
.message.loading .message-bubble {
    padding: 16px 20px;
}

.loading-dots {
    display: flex;
    align-items: center;
    gap: 6px;
}

.loading-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    animation: dotPulse 1.4s infinite ease-in-out both;
}

.loading-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.loading-dot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes dotPulse {
    0%, 80%, 100% {
        transform: scale(0.6);
        opacity: 0.4;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ============================================================================
   INPUT AREA
   ============================================================================ */

.input-area {
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.input-wrapper-enhanced {
    max-width: 800px;
    margin: 0 auto;
}

.input-container {
    display: flex;
    align-items: center;
    gap: 12px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 8px 12px;
    transition: var(--transition);
}

.input-container:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-action-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background-color: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.message-input-enhanced {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 15px;
    padding: 10px;
    outline: none;
}

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

.send-btn-enhanced {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--gradient-primary);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.send-btn-enhanced:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.file-status-enhanced {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: 8px;
    background-color: var(--bg-tertiary);
}

.input-footer {
    text-align: center;
    margin-top: 12px;
}

.footer-text {
    font-size: 11px;
    color: var(--text-tertiary);
}

/* ============================================================================
   MODAL
   ============================================================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn 0.2s ease-out;
}

.modal-content-enhanced {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s ease-out;
}

.modal-header-enhanced {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background-color: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.modal-body-enhanced {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px 14px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-textarea {
    resize: vertical;
    font-family: inherit;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.modal-footer-enhanced {
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.btn-primary,
.btn-secondary {
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

/* ============================================================================
   ANIMATIONS
   ============================================================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* ============================================================================
   SCROLLBAR
   ============================================================================ */

.file-input-hidden {
    display: none;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 4px;
}

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

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -280px;
        top: 0;
        bottom: 0;
        z-index: 100;
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .capability-grid {
        grid-template-columns: 1fr;
    }
    
    .welcome-heading {
        font-size: 28px;
    }
}