:root {
    /* Light Theme (Default) */
    --bg-color: #f7f6f3;
    --sidebar-bg: #f0eee6;
    --text-primary: #333333;
    --text-secondary: #666666;
    --accent-color: #d97757;
    --user-msg-bg: #f0f0f0;
    --ai-msg-bg: transparent;
    --border-color: #e5e5e5;
    --input-bg: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --hover-bg: rgba(0, 0, 0, 0.05);
    --active-bg: rgba(0, 0, 0, 0.08);
    --font-serif: 'Merriweather', serif;
    --font-sans: 'Inter', sans-serif;
    --code-bg: #0d1117;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    /* deep dark gray/black */
    --sidebar-bg: #131313;
    /* darker sidebar */
    --text-primary: #ededed;
    --text-secondary: #a1a1a1;
    --accent-color: #d97757;
    --user-msg-bg: #2a2a2a;
    --ai-msg-bg: transparent;
    --border-color: #333333;
    --input-bg: #252525;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.6);
    --hover-bg: rgba(255, 255, 255, 0.05);
    --active-bg: rgba(255, 255, 255, 0.08);
    --code-bg: #0d1117;
}


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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
    color: #2d2d2d;
}

.icon-btn {
    padding: 8px;
    border-radius: 6px;
    color: var(--text-secondary);
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.history-section-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.history-item {
    padding: 10px 12px;
    margin-bottom: 4px;
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: background-color 0.2s;
    cursor: pointer;
}

.history-item:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.history-item.active {
    background-color: rgba(0, 0, 0, 0.08);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar {
    width: 32px;
    height: 32px;
    background-color: var(--accent-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

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

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background-color: var(--bg-color);
}

.chat-header {
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    /* border-bottom: 1px solid rgba(0,0,0,0.03); */
    /* Claude is very clean, minimal borders */
}

/* Custom Model Selector */
.model-selector-container {
    position: relative;
    z-index: 50;
}

.custom-select {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: background-color 0.2s, color 0.2s;
}

.custom-select:hover {
    background-color: var(--hover-bg);
    color: var(--text-primary);
}

.select-icon {
    width: 16px;
    height: 16px;
    transition: transform 0.2s;
}

.custom-select.active .select-icon {
    transform: rotate(180deg);
}

.model-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 8px;
    width: 280px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    display: none;
    flex-direction: column;
    padding: 6px;
    animation: fadeInScale 0.1s ease-out;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-5px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.model-dropdown.show {
    display: flex;
}

.model-option {
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 2px;
    transition: background-color 0.2s;
}

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

.model-option.selected {
    background-color: var(--active-bg);
}

.model-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    /* Center content max-width */
}

/* Welcome Screen */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    width: 100%;
    max-width: 700px;
    text-align: center;
}

.welcome-icon {
    background-color: white;
    padding: 16px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    color: var(--accent-color);
}

.welcome-screen h1 {
    font-family: var(--font-serif);
    font-weight: 400;
    font-size: 2rem;
    margin-bottom: 40px;
}

.suggestions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    width: 100%;
}

.suggestion-card {
    background-color: white;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    padding: 16px;
    text-align: left;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

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

.suggestion-card h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.suggestion-card p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Chat Messages */
.message-wrapper {
    width: 100%;
    max-width: 800px;
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    /* More square for Claude */
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 600;
    font-size: 0.8rem;
}

.message-avatar.user {
    background-color: #f0f0f0;
    color: #555;
    border-radius: 50%;
}

.message-avatar.ai {
    background-color: var(--accent-color);
    color: white;
}

.message-content {
    flex: 1;
    font-size: 1rem;
    line-height: 1.6;
}

.message-content.user {
    /* User specific styles if needed */
}

.message-content.ai {
    font-family: var(--font-serif);
    /* Claude uses Serif for AI responses */
}

/* Markdown Styles */
.message-content p {
    margin-bottom: 1em;
}

.message-content pre {
    background-color: #0d1117;
    border-radius: 8px;
    padding: 16px;
    overflow-x: auto;
    margin: 1em 0;
}

.message-content code {
    font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}

.message-content p code {
    background-color: rgba(0, 0, 0, 0.05);
    padding: 2px 4px;
    border-radius: 4px;
}

/* Input Area */
.input-area-container {
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: linear-gradient(to top, var(--bg-color) 80%, transparent);
}

.input-area {
    width: 100%;
    max-width: 800px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 12px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: flex-end;
    gap: 10px;
    transition: box-shadow 0.2s;
}

.input-area:focus-within {
    box-shadow: var(--shadow-md);
    border-color: #d1d1d1;
}

#chat-input {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    font-family: var(--font-sans);
    font-size: 1rem;
    max-height: 200px;
    padding: 8px 0;
}

.send-btn {
    background-color: var(--accent-color);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
    cursor: default;
    transition: opacity 0.2s, background-color 0.2s;
}

.send-btn:not(:disabled) {
    opacity: 1;
    cursor: pointer;
}

.send-btn:not(:disabled):hover {
    background-color: #c96b4d;
}

.disclaimer {
    margin-top: 10px;
    font-size: 0.75rem;
    color: #999;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        z-index: 100;
        height: 100%;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    }

    .mobile-only {
        display: flex;
    }

    .suggestions {
        grid-template-columns: 1fr;
    }

    .welcome-screen h1 {
        font-size: 1.5rem;
    }
}

@media (min-width: 769px) {
    .mobile-only {
        display: none;
    }
}

/* ============================================
   NAVIGATION TABS
   ============================================ */
.nav-tabs {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
    text-align: left;
}

.nav-tab:hover {
    background-color: var(--hover-bg);
    color: var(--text-primary);
}

.nav-tab.active {
    background-color: var(--active-bg);
    color: var(--text-primary);
}

.nav-tab i {
    width: 18px;
    height: 18px;
}

/* ============================================
   VIEW PANELS
   ============================================ */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: row;
    /* Artifacts side panel sibling */
    background-color: var(--bg-color);
    position: relative;
    overflow: hidden;
}

.view-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 600px;
    /* Base chat width, will expand */
    flex: 1;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Chat View specific */
#chat-view {
    display: flex;
    flex-direction: column;
}

#chat-view.active {
    display: flex;
}

#chat-view .messages-container {
    flex: 1;
    overflow-y: auto;
}

#chat-view .input-area-container {
    flex-shrink: 0;
}


/* ============================================
   PANEL HEADER
   ============================================ */
.panel-header {
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.panel-header h2 i {
    width: 20px;
    height: 20px;
    color: var(--accent-color);
}

.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* ============================================
   ACTION BUTTONS
   ============================================ */
.action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    background-color: var(--accent-color);
    color: white;
    transition: all 0.2s;
}

.action-btn:hover {
    background-color: #c96b4d;
}

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

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

.action-btn i {
    width: 16px;
    height: 16px;
}

/* ============================================
   CODE PANEL
   ============================================ */
.code-lang-select {
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.85rem;
}

.code-panel-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.code-editor-container {
    flex: 1;
    padding: 16px;
    min-height: 200px;
}

.code-editor {
    width: 100%;
    height: 100%;
    min-height: 300px;
    padding: 16px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background-color: var(--code-bg);
    color: #c9d1d9;
    font-family: 'Fira Code', 'Menlo', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    resize: none;
}

.code-editor:focus {
    outline: none;
    border-color: var(--accent-color);
}

.code-output-container {
    border-top: 1px solid var(--border-color);
    max-height: 200px;
    display: flex;
    flex-direction: column;
}

.output-header {
    padding: 10px 16px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    background-color: var(--hover-bg);
}

.code-output {
    flex: 1;
    padding: 16px;
    margin: 0;
    overflow-y: auto;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    background-color: var(--code-bg);
    color: #c9d1d9;
}

/* ============================================
   PRIVE CODE PANEL
   ============================================ */
.prive-content {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.prive-snippets-list {
    width: 280px;
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 16px;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
    color: var(--text-secondary);
}

.empty-state i {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    margin-bottom: 16px;
}

.prive-editor-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 16px;
}

.snippet-title-input {
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.snippet-title-input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.snippet-item {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 8px;
    background-color: var(--hover-bg);
    cursor: pointer;
    transition: all 0.2s;
}

.snippet-item:hover {
    background-color: var(--active-bg);
}

.snippet-item h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 4px;
}

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

/* ============================================
   IMAGE PREVIEW
   ============================================ */
.image-preview-container {
    padding: 10px 20px;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.image-preview-wrapper {
    position: relative;
    display: inline-block;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

#image-preview {
    max-width: 200px;
    max-height: 150px;
    object-fit: cover;
    border-radius: 12px;
}

.remove-image-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.remove-image-btn:hover {
    background-color: #e74c3c;
}

.remove-image-btn i {
    width: 14px;
    height: 14px;
}

/* ============================================
   DARK MODE FIXES
   ============================================ */
[data-theme="dark"] .logo {
    color: var(--text-primary);
}

[data-theme="dark"] .welcome-icon {
    background-color: var(--input-bg);
}

[data-theme="dark"] .suggestion-card {
    background-color: var(--input-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .suggestion-card:hover {
    background-color: var(--hover-bg);
}

[data-theme="dark"] #chat-input {
    background-color: transparent;
    color: var(--text-primary);
}

[data-theme="dark"] .code-lang-select {
    color: var(--text-primary);
}

/* ============================================
   ARTIFACTS PANEL (SIDE PREVIEW)
   ============================================ */
.artifacts-panel {
    width: 0;
    max-width: 50%;
    background: var(--sidebar-bg);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 50;
    height: 100%;
}

.artifacts-panel.active {
    width: 45%;
    min-width: 400px;
}

.artifacts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-color);
}

.artifacts-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.artifacts-actions {
    display: flex;
    gap: 8px;
}

.action-btn.icon-only {
    padding: 6px;
    border-radius: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

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

.action-btn.icon-only.close:hover {
    color: #ef4444;
}

.artifacts-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.artifacts-tabs {
    display: flex;
    padding: 8px 16px;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
    background: var(--sidebar-bg);
}

.artifact-tab {
    background: none;
    border: none;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 4px 0;
    cursor: pointer;
    position: relative;
    transition: color 0.2s;
}

.artifact-tab:hover {
    color: var(--text-primary);
}

.artifact-tab.active {
    color: var(--accent-color);
}

.artifact-tab.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color);
}

.artifact-viewer {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.artifact-view {
    display: none;
    height: 100%;
    width: 100%;
}

.artifact-view.active {
    display: block;
}

.artifact-iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: #ffffff;
}

[data-theme="dark"] .artifact-iframe {
    background: #1a1a1a;
}

#artifact-code-view pre {
    margin: 0;
    padding: 20px;
    height: 100%;
    overflow: auto;
    font-family: 'Fira Code', monospace;
    font-size: 13px;
    background: #0d1117;
}

/* Updated Chat Code Action styles */
.code-block-actions {
    display: flex;
    gap: 8px;
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 5;
    opacity: 0;
    transition: opacity 0.2s;
}

.message-content pre:hover .code-block-actions {
    opacity: 1;
}

.code-preview-btn,
.code-copy-btn {
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 11px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.code-preview-btn:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.code-copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Fix pre styling for artifacts */
.message-content pre {
    margin: 12px 0;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: #0d1117 !important;
}