/* ============================================
   KimiBuilt AI Chat - Premium Styles v2.0
   ============================================ */

/* CSS Variables for theming */
:root {
    /* Dark theme (default) */
    --bg-primary: #0d0d0d;
    --bg-secondary: #171717;
    --bg-tertiary: #262626;
    --bg-hover: #404040;
    --bg-elevated: #1f1f1f;
    
    --text-primary: #fafafa;
    --text-secondary: #a3a3a3;
    --text-tertiary: #737373;
    --text-muted: #525252;
    
    --border: #262626;
    --border-focus: #404040;
    --border-accent: #3b82f6;
    
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-light: rgba(59, 130, 246, 0.15);
    --accent-glow: rgba(59, 130, 246, 0.4);
    
    --user-message-bg: #3b82f6;
    --user-message-text: #ffffff;
    --assistant-message-bg: #262626;
    --assistant-message-text: #fafafa;
    
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    --purple: #8b5cf6;
    --purple-hover: #7c3aed;
    --purple-light: rgba(139, 92, 246, 0.15);
    
    --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);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
    --shadow-purple-glow: 0 0 20px rgba(139, 92, 246, 0.3);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Menlo', 'Monaco', 'Courier New', monospace;
}

/* Light theme */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f4f4f5;
    --bg-hover: #e4e4e7;
    --bg-elevated: #ffffff;
    
    --text-primary: #18181b;
    --text-secondary: #71717a;
    --text-tertiary: #a1a1aa;
    --text-muted: #d4d4d8;
    
    --border: #e4e4e7;
    --border-focus: #d4d4d8;
    --border-accent: #3b82f6;
    
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-light: rgba(59, 130, 246, 0.1);
    --accent-glow: rgba(59, 130, 246, 0.2);
    
    --user-message-bg: #3b82f6;
    --user-message-text: #ffffff;
    --assistant-message-bg: #f4f4f5;
    --assistant-message-text: #18181b;
    
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    --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, 0.15);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
    --shadow-purple-glow: 0 0 20px rgba(139, 92, 246, 0.15);
}

/* Tailwind color mappings */
.bg-bg-primary { background-color: var(--bg-primary); }
.bg-bg-secondary { background-color: var(--bg-secondary); }
.bg-bg-tertiary { background-color: var(--bg-tertiary); }
.bg-bg-hover { background-color: var(--bg-hover); }
.bg-bg-elevated { background-color: var(--bg-elevated); }

.text-text-primary { color: var(--text-primary); }
.text-text-secondary { color: var(--text-secondary); }
.text-text-tertiary { color: var(--text-tertiary); }
.text-text-muted { color: var(--text-muted); }

.border-border { border-color: var(--border); }
.border-accent { border-color: var(--accent); }

/* ============================================
   Base Styles
   ============================================ */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overscroll-behavior: none;
}

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

::-webkit-scrollbar-track {
    background: transparent;
}

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

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

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--text-muted) transparent;
}

/* ============================================
   Animations
   ============================================ */

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes slide-in-right {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse-slow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes bounce-subtle {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-2px); }
}

@keyframes typing-bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-4px); }
}

@keyframes cursor-blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

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

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

@keyframes image-generate {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.animate-pulse-slow {
    animation: pulse-slow 3s ease-in-out infinite;
}

.animate-bounce-subtle {
    animation: bounce-subtle 2s ease-in-out infinite;
}

.fade-in {
    animation: fade-in 0.3s ease-out;
}

.slide-up {
    animation: slide-up 0.3s ease-out;
}

.scale-in {
    animation: scale-in 0.2s ease-out;
}

/* ============================================
   Sidebar
   ============================================ */

.sidebar {
    width: 300px;
    flex-shrink: 0;
}

.sidebar.collapsed {
    width: 0;
    overflow: hidden;
    border-right: none;
}

#sessions-list {
    scrollbar-width: thin;
    scrollbar-color: var(--text-muted) transparent;
}

.session-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.session-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.session-item:hover {
    background-color: var(--bg-hover);
    border-color: var(--border);
    transform: translateX(2px);
}

.session-item.active {
    background-color: var(--accent-light);
    border-color: var(--accent);
}

.session-item.active::before {
    opacity: 1;
}

.session-icon {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.session-item:hover .session-icon {
    transform: scale(1.05);
}

.session-icon.chat {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
}

.session-icon.code {
    background: linear-gradient(135deg, #10b981, #06b6d4);
}

.session-icon.agent {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
}

.session-icon.image {
    background: linear-gradient(135deg, #8b5cf6, #ec4899);
}

.session-info {
    flex: 1;
    min-width: 0;
}

.session-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.session-actions {
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.session-item:hover .session-actions {
    opacity: 1;
}

/* Mobile sidebar overlay */
.sidebar-overlay {
    backdrop-filter: blur(4px);
    transition: opacity var(--transition-normal);
}

.mobile-only {
    display: none;
}

/* ============================================
   Buttons
   ============================================ */

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: white;
    border: none;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--accent-hover), #1d4ed8);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

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

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

.btn-icon {
    background-color: transparent;
    color: var(--text-secondary);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
}

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

.btn-icon.danger:hover {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

/* ============================================
   Model Selector
   ============================================ */

/* Connection Status */
.connection-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    font-weight: 500;
}

.connection-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #888;
    transition: all 0.3s ease;
}

.connection-indicator.connected {
    background-color: var(--success);
    box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.3);
}

.connection-indicator.disconnected {
    background-color: var(--error);
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.3);
}

.connection-indicator.checking {
    background-color: var(--warning);
    animation: pulse 1.5s infinite;
}

.connection-text {
    color: var(--text-secondary);
}

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

.model-selector-wrapper {
    position: relative;
}

.model-selector-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.model-selector-dropdown {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 80px;
}

.model-selector-dropdown-overlay {
    position: absolute;
    inset: 0;
    background-color: transparent;
}

.model-selector-dropdown-content {
    position: relative;
    width: 100%;
    max-width: 360px;
    max-height: 500px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    animation: scale-in 0.2s ease-out;
}

.model-selector-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    background-color: var(--bg-tertiary);
}

.model-list {
    max-height: 400px;
    overflow-y: auto;
    padding: 0.5rem;
}

.model-group {
    margin-bottom: 0.5rem;
}

.model-group-title {
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-tertiary);
    letter-spacing: 0.05em;
}

.model-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.model-item:hover {
    background-color: var(--bg-hover);
    border-color: var(--border);
}

.model-item.active {
    background-color: var(--accent-light);
    border-color: var(--accent);
}

.model-item-icon {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent), var(--purple));
    color: white;
    flex-shrink: 0;
}

.model-item-icon.anthropic {
    background: linear-gradient(135deg, #d97757, #b85c3e);
}

.model-item-icon.openai {
    background: linear-gradient(135deg, #10a37f, #0d8c6d);
}

.model-item-icon.google {
    background: linear-gradient(135deg, #4285f4, #34a853);
}

.model-item-icon.meta {
    background: linear-gradient(135deg, #0668e1, #0081fb);
}

.model-item-info {
    flex: 1;
    min-width: 0;
}

.model-item-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.model-item-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.model-item-check {
    color: var(--accent);
    opacity: 0;
}

.model-item.active .model-item-check {
    opacity: 1;
}

/* Input model indicator */
#input-model-indicator {
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
}

/* ============================================
   Chat Header
   ============================================ */

.chat-header {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* ============================================
   Typing Indicator
   ============================================ */

.typing-indicator-container {
    position: sticky;
    top: 73px;
    z-index: 9;
    padding: 0.5rem 1rem;
    background: linear-gradient(to bottom, var(--bg-primary), transparent);
}

.typing-indicator-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    max-width: 4xl;
    margin: 0 auto;
}

.typing-avatar {
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 50%;
    background: linear-gradient(135deg, #8b5cf6, #ec4899);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.typing-bubble {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--assistant-message-bg);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.typing-text {
    font-style: italic;
}

.typing-dots {
    display: flex;
    gap: 0.25rem;
}

.typing-dots span {
    width: 0.375rem;
    height: 0.375rem;
    background-color: var(--text-secondary);
    border-radius: 50%;
    animation: typing-bounce 1.4s infinite ease-in-out both;
}

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

/* ============================================
   Messages
   ============================================ */

#messages-container {
    scroll-behavior: smooth;
}

.message {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    border-radius: var(--radius-xl);
    animation: message-appear 0.3s ease-out;
    position: relative;
    transition: background-color var(--transition-fast);
}

.message:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .message:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

.message.highlighted {
    background-color: var(--accent-light);
    animation: pulse-slow 2s ease-in-out;
}

.message-avatar {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.message-avatar.user {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
}

.message-avatar.assistant {
    background: linear-gradient(135deg, #8b5cf6, #ec4899);
    color: white;
}

.message-avatar.system {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    color: white;
}

.message-content {
    flex: 1;
    min-width: 0;
    max-width: 100%;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.375rem;
}

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

.message-time {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.message:hover .message-time {
    color: var(--text-secondary);
}

.message-actions {
    opacity: 0;
    transition: opacity var(--transition-fast);
    display: flex;
    gap: 0.25rem;
}

.message:hover .message-actions {
    opacity: 1;
}

.message-action-btn {
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    color: var(--text-tertiary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.message-text {
    color: var(--text-primary);
    line-height: 1.75;
    word-wrap: break-word;
}

/* User message specific */
.message.user {
    background-color: transparent;
    flex-direction: row-reverse;
}

.message.user .message-content {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.message.user .message-header {
    flex-direction: row-reverse;
}

.message.user .message-text {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: var(--user-message-text);
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-xl);
    border-bottom-right-radius: 0.375rem;
    display: inline-block;
    max-width: 85%;
    box-shadow: var(--shadow-sm);
}

/* Assistant message specific */
.message.assistant {
    background-color: transparent;
}

.message.assistant .message-text {
    background-color: var(--assistant-message-bg);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-xl);
    border-bottom-left-radius: 0.375rem;
    box-shadow: var(--shadow-sm);
}

/* System message specific */
.message.system {
    background-color: transparent;
}

.message.system .message-text {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(239, 68, 68, 0.1));
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    font-style: italic;
}

/* ============================================
   Image Messages
   ============================================ */

.message-image {
    background-color: var(--assistant-message-bg);
    padding: 1rem;
    border-radius: var(--radius-xl);
    border-bottom-left-radius: 0.375rem;
    box-shadow: var(--shadow-sm);
}

.image-generation-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.image-generation-info .icon {
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--purple), #ec4899);
    color: white;
}

.image-generation-info .text {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.image-generation-info .meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-left: auto;
}

.image-container {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--bg-tertiary);
}

.image-container img {
    width: 100%;
    height: auto;
    display: block;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.image-container:hover img {
    transform: scale(1.02);
}

.image-container.loading {
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
}

.image-loading-indicator .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bg-hover);
    border-top-color: var(--purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.image-loading-indicator .text {
    font-size: 0.875rem;
}

.image-revised-prompt {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.image-revised-prompt .label {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.image-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.image-action-btn {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* ============================================
   Image Lightbox
   ============================================ */

.image-lightbox {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.image-lightbox-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(4px);
}

.image-lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.image-lightbox-close {
    position: absolute;
    top: -3rem;
    right: 0;
    padding: 0.5rem;
    background: transparent;
    border: none;
    color: white;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.image-lightbox-close:hover {
    opacity: 1;
}

.image-lightbox-content img {
    max-width: 100%;
    max-height: calc(90vh - 80px);
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.image-lightbox-actions {
    display: flex;
    gap: 0.75rem;
}

/* ============================================
   Markdown Content
   ============================================ */

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin-top: 1.75rem;
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

.markdown-content h1 { font-size: 1.75rem; }
.markdown-content h2 { font-size: 1.375rem; }
.markdown-content h3 { font-size: 1.125rem; }
.markdown-content h4 { font-size: 1rem; }
.markdown-content h5 { font-size: 0.875rem; }
.markdown-content h6 { font-size: 0.75rem; }

.markdown-content p {
    margin-bottom: 1rem;
}

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

.markdown-content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.markdown-content a:hover {
    border-bottom-color: var(--accent);
}

.markdown-content ul,
.markdown-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.markdown-content li {
    margin-bottom: 0.375rem;
}

.markdown-content li > ul,
.markdown-content li > ol {
    margin-top: 0.375rem;
    margin-bottom: 0.375rem;
}

.markdown-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

.markdown-content code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background-color: var(--bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
}

.markdown-content pre {
    background-color: #1e1e1e;
    border-radius: var(--radius-lg);
    padding: 0;
    overflow-x: auto;
    margin: 1rem 0;
    position: relative;
}

.markdown-content pre code {
    background-color: transparent;
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.6;
}

.markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.875rem;
}

.markdown-content th,
.markdown-content td {
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border);
    text-align: left;
}

.markdown-content th {
    background-color: var(--bg-tertiary);
    font-weight: 600;
}

.markdown-content tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .markdown-content tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.02);
}

.markdown-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 1.5rem 0;
}

.markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

/* Task lists */
.markdown-content input[type="checkbox"] {
    margin-right: 0.5rem;
    accent-color: var(--accent);
}

/* ============================================
   Code Blocks - Premium Styling
   ============================================ */

.code-block {
    position: relative;
    margin: 1rem 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: #1e1e1e;
    border: 1px solid #2d2d2d;
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 1rem;
    background-color: #2d2d2d;
    border-bottom: 1px solid #3d3d3d;
}

.code-language {
    font-size: 0.75rem;
    font-weight: 600;
    color: #a3a3a3;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.code-language::before {
    content: '';
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--accent);
}

.code-actions {
    display: flex;
    gap: 0.5rem;
}

.code-copy-btn {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: #a3a3a3;
    background-color: transparent;
    border: 1px solid #3d3d3d;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.code-copy-btn:hover {
    background-color: #3d3d3d;
    color: #f5f5f5;
    border-color: #4d4d4d;
}

.code-copy-btn.copied {
    background-color: rgba(34, 197, 94, 0.15);
    border-color: var(--success);
    color: var(--success);
}

.code-block pre {
    margin: 0;
    padding: 1rem;
    overflow-x: auto;
    background-color: #1e1e1e;
}

/* Line numbers */
.code-block.line-numbers pre {
    padding-left: 3.5rem;
}

.line-numbers-rows {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3rem;
    padding: 1rem 0;
    background-color: #252525;
    border-right: 1px solid #333;
    font-size: 0.875rem;
    line-height: 1.6;
    color: #525252;
    text-align: right;
    user-select: none;
}

.line-numbers-rows > span {
    display: block;
    padding-right: 0.75rem;
    counter-increment: linenumber;
}

.line-numbers-rows > span::before {
    content: counter(linenumber);
}

/* Prism.js theme adjustments */
pre[class*="language-"] {
    background: #1e1e1e !important;
    margin: 0 !important;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg) !important;
    font-size: 0.875rem !important;
    line-height: 1.6 !important;
}

code[class*="language-"] {
    font-family: var(--font-mono) !important;
    text-shadow: none !important;
}

/* Streaming cursor */
.streaming-cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background-color: var(--accent);
    margin-left: 2px;
    animation: cursor-blink 1s infinite;
    vertical-align: text-bottom;
}

/* ============================================
   Input Area
   ============================================ */

.input-area {
    position: sticky;
    bottom: 0;
    z-index: 20;
}

#message-input {
    font-family: inherit;
    font-size: 0.9375rem;
    line-height: 1.5;
}

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

/* Image Button */
.image-btn {
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.image-btn:hover {
    transform: scale(1.05);
}

/* ============================================
   Suggestion Chips
   ============================================ */

.suggestion-chip {
    transition: all var(--transition-fast);
    cursor: pointer;
}

.suggestion-chip:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   Connection Status
   ============================================ */

#connection-status {
    transition: all var(--transition-fast);
}

#connection-status.connected {
    background-color: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

#connection-status.connecting {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

#connection-status.disconnected {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

#status-dot {
    transition: all var(--transition-fast);
}

#status-dot.connected {
    background-color: var(--success) !important;
    box-shadow: 0 0 8px var(--success);
}

#status-dot.connecting {
    background-color: var(--warning) !important;
    animation: pulse 1.5s infinite;
}

#status-dot.disconnected {
    background-color: var(--error) !important;
}

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

/* ============================================
   Search Bar
   ============================================ */

.search-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 30;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1rem;
    animation: slide-down 0.2s ease-out;
}

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

.search-bar-inner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    max-width: 600px;
    margin: 0 auto;
}

#search-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.9375rem;
    outline: none;
}

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

.search-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
    min-width: 3rem;
    text-align: center;
}

.search-highlight {
    background-color: rgba(245, 158, 11, 0.3);
    border-radius: 2px;
    padding: 0 2px;
}

.search-highlight.current {
    background-color: rgba(245, 158, 11, 0.6);
}

/* ============================================
   Command Palette
   ============================================ */

.command-palette {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
}

.command-palette-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.command-palette-content {
    position: relative;
    width: 100%;
    max-width: 600px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    animation: scale-in 0.2s ease-out;
}

.command-palette-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

#command-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
}

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

.command-shortcut-hint {
    padding: 0.25rem 0.5rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

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

.command-group {
    padding: 0.5rem 0;
}

.command-group-title {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-tertiary);
    letter-spacing: 0.05em;
}

.command-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.command-item:hover,
.command-item.selected {
    background-color: var(--bg-tertiary);
}

.command-item-icon {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-hover);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
}

.command-item-content {
    flex: 1;
}

.command-item-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.command-item-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.command-item-shortcut {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    padding: 0.25rem 0.5rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.command-palette-footer {
    display: flex;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.command-palette-footer kbd {
    padding: 0.125rem 0.375rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-family: inherit;
}

/* ============================================
   Modal
   ============================================ */

.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 480px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: scale-in 0.2s ease-out;
}

.image-modal-content {
    max-width: 420px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-body {
    padding: 1.25rem;
}

.export-options {
    display: grid;
    gap: 0.75rem;
}

.export-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
}

.export-option:hover {
    background-color: var(--bg-hover);
    border-color: var(--accent);
    transform: translateX(4px);
}

.export-name {
    font-weight: 500;
    color: var(--text-primary);
}

.export-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Image Generation Modal Styles */
.quality-btn,
.style-btn {
    color: var(--text-secondary);
    border-color: var(--border);
}

.quality-btn:hover,
.style-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.quality-btn.active,
.style-btn.active {
    background: linear-gradient(135deg, var(--purple), #7c3aed);
    color: white;
    border-color: var(--purple);
}

#image-generate-btn {
    background: linear-gradient(135deg, var(--purple), var(--purple-hover));
    margin-top: 0.5rem;
}

#image-generate-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--purple-hover), #6d28d9);
    box-shadow: var(--shadow-md), var(--shadow-purple-glow);
}

#image-generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#image-generate-btn.generating {
    background: linear-gradient(270deg, var(--purple), #ec4899, var(--purple));
    background-size: 200% 200%;
    animation: image-generate 2s ease infinite;
}

/* ============================================
   Toasts
   ============================================ */

.toast {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    border-radius: var(--radius-lg);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    animation: slide-in-right 0.3s ease-out;
    max-width: 400px;
}

.toast.success {
    border-color: var(--success);
    background-color: rgba(34, 197, 94, 0.1);
}

.toast.error {
    border-color: var(--error);
    background-color: rgba(239, 68, 68, 0.1);
}

.toast.warning {
    border-color: var(--warning);
    background-color: rgba(245, 158, 11, 0.1);
}

.toast.info {
    border-color: var(--info);
    background-color: rgba(59, 130, 246, 0.1);
}

.toast-icon {
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

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

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

.toast-close {
    flex-shrink: 0;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    background: none;
    border: none;
    padding: 0.25rem;
}

.toast-close:hover {
    color: var(--text-primary);
}

/* ============================================
   Empty States
   ============================================ */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
    color: var(--text-secondary);
}

.empty-state-icon {
    width: 4rem;
    height: 4rem;
    margin-bottom: 1rem;
    color: var(--text-tertiary);
}

.empty-state-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.empty-state-text {
    font-size: 0.875rem;
    max-width: 300px;
}

/* ============================================
   Loading Overlay
   ============================================ */

.loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: rgba(13, 13, 13, 0.8);
    backdrop-filter: blur(4px);
}

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

.loading-text {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .mobile-only {
        display: flex;
    }
    
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 50;
        transform: translateX(-100%);
        width: 85%;
        max-width: 320px;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .chat-header {
        padding-left: 4rem;
        padding-right: 1rem;
    }
    
    .model-selector-btn {
        padding: 0.375rem 0.5rem;
        font-size: 0.75rem;
    }
    
    .model-selector-btn span {
        display: none;
    }
    
    .message {
        padding: 0.875rem;
        gap: 0.75rem;
    }
    
    .message-avatar {
        width: 1.75rem;
        height: 1.75rem;
    }
    
    .message.user .message-text,
    .message.assistant .message-text,
    .message-image {
        max-width: 95%;
        padding: 0.75rem 1rem;
    }
    
    .suggestion-chip {
        padding: 0.875rem !important;
    }
    
    .input-area {
        padding: 0.75rem;
    }
    
    .code-header {
        padding: 0.5rem 0.75rem;
    }
    
    .code-block pre {
        padding: 0.75rem;
    }
    
    .command-palette {
        padding-top: 5vh;
    }
    
    .command-palette-content {
        margin: 0 1rem;
    }
    
    .model-selector-dropdown {
        padding-top: 70px;
    }
    
    .model-selector-dropdown-content {
        margin: 0 1rem;
    }
    
    /* Mobile keyboard handling */
    body.keyboard-open .input-area {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
    }
    
    .image-lightbox-content img {
        max-height: calc(90vh - 60px);
    }
}

@media (max-width: 480px) {
    .sidebar {
        width: 100%;
        max-width: none;
    }
    
    .message-actions {
        opacity: 1;
    }
    
    .session-actions {
        opacity: 1;
    }
    
    .typing-indicator-container {
        top: 65px;
    }
    
    .image-modal-content {
        max-width: 100%;
        margin: 0 0.5rem;
    }
}

/* ============================================
   Utility Classes
   ============================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.text-gradient {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

[data-theme="light"] .glass {
    background: rgba(0, 0, 0, 0.02);
}

/* Selection colors */
::selection {
    background-color: var(--accent-light);
    color: var(--text-primary);
}

/* Focus styles */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Smooth transitions for theme switching */
*,
*::before,
*::after {
    transition-property: background-color, border-color, color;
    transition-duration: 150ms;
    transition-timing-function: ease;
}

/* Disable transitions on page load */
.preload * {
    transition: none !important;
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .sidebar,
    .input-area,
    .chat-header button,
    #sidebar-toggle,
    .command-palette,
    .modal,
    .search-bar,
    .typing-indicator-container,
    .toast,
    .message-actions,
    .model-selector-wrapper,
    .image-btn,
    .image-lightbox,
    .model-selector-dropdown {
        display: none !important;
    }
    
    .message {
        break-inside: avoid;
        page-break-inside: avoid;
    }
    
    .message.user .message-text {
        background-color: #e5e7eb !important;
        color: #000 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    .message.assistant .message-text,
    .message-image {
        background-color: #f3f4f6 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    .message-image img {
        max-width: 100% !important;
    }
}