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

:root {
    --bg-primary: #212121;
    --bg-secondary: #2f2f2f;
    --bg-tertiary: #424242;
    --text-primary: #ececec;
    --text-secondary: #b4b4b4;
    --accent: #10a37f;
    --accent-hover: #1a7f64;
    --border: #444;
    --user-msg-bg: #2f2f2f;
    --assistant-msg-bg: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

#app {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.section {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

/* Login Section */
.login-container {
    max-width: 400px;
    margin: auto;
    padding: 2rem;
    text-align: center;
}

.login-container h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

#login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#email-input {
    padding: 0.875rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
}

#email-input:focus {
    outline: none;
    border-color: var(--accent);
}

#login-btn {
    padding: 0.875rem 1rem;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

#login-btn:hover {
    background: var(--accent-hover);
}

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

.message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.9rem;
}

.message.success {
    background: rgba(16, 163, 127, 0.2);
    color: var(--accent);
}

.message.error {
    background: rgba(255, 100, 100, 0.2);
    color: #ff6464;
}

.dev-link {
    margin-top: 1rem;
    font-size: 0.85rem;
}

.dev-link a {
    color: var(--accent);
    text-decoration: none;
}

.dev-link a:hover {
    text-decoration: underline;
}

/* Chat Section */
.chat-layout {
    display: flex;
    height: 100%;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

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

.sidebar-header .new-chat-btn {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.conversation-item {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
    position: relative;
    margin-bottom: 0.25rem;
}

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

.conversation-item.active {
    background: var(--bg-tertiary);
}

.conversation-title {
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 1.5rem;
}

.conversation-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.conversation-delete {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s;
    padding: 0.25rem 0.5rem;
    line-height: 1;
}

.conversation-item:hover .conversation-delete {
    opacity: 1;
}

.conversation-delete:hover {
    color: #ff6464;
}

.no-conversations {
    padding: 1rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Chat Container */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.chat-header h1 {
    font-size: 1.25rem;
}

.new-chat-btn {
    padding: 0.5rem 1rem;
    background: var(--accent);
    border: none;
    border-radius: 6px;
    color: white;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 0.9rem;
}

.new-chat-btn:hover {
    background: var(--accent-hover);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.logout-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.logout-btn:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.chat-main {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.messages {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message-bubble {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    max-width: 85%;
    line-height: 1.5;
}

.message-bubble.user {
    background: var(--user-msg-bg);
    align-self: flex-end;
    border: 1px solid var(--border);
    position: relative;
}

.message-bubble.user.has-overflow {
    cursor: pointer;
}

/* User message expand button - top right, only visible when content overflows */
.message-bubble.user .expand-btn {
    display: none;
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    transition: color 0.15s;
    line-height: 0;
}

.message-bubble.user.has-overflow .expand-btn {
    display: block;
}

.message-bubble.user .expand-btn:hover {
    color: var(--accent);
}

/* User message copy button - left side, bottom anchored */
.message-bubble.user .copy-btn {
    position: absolute;
    left: -2rem;
    bottom: 0.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    opacity: 0;
    transition: opacity 0.15s, color 0.15s;
    line-height: 0;
}

.message-bubble.user:hover .copy-btn {
    opacity: 1;
}

.message-bubble.user .copy-btn:hover {
    color: var(--accent);
}

/* Collapsed state for user messages */
.message-bubble.user.collapsed .content {
    max-height: 1.5em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding-right: 1.5rem;
}

.message-bubble.user:not(.collapsed) .content {
    white-space: normal;
}

.message-bubble.assistant {
    background: var(--assistant-msg-bg);
    align-self: flex-start;
    position: relative;
}

/* Assistant message copy button - right side, bottom anchored */
.message-bubble.assistant .copy-btn {
    position: absolute;
    right: -2rem;
    bottom: 0.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    opacity: 0;
    transition: opacity 0.15s, color 0.15s;
    line-height: 0;
}

.message-bubble.assistant:hover .copy-btn {
    opacity: 1;
}

.message-bubble.assistant .copy-btn:hover {
    color: var(--accent);
}

.message-bubble .tools-used {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.message-bubble .tools-used code {
    background: var(--bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-family: monospace;
}

.message-bubble .tools-used .tool-tag {
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.message-bubble .tools-used .tool-tag:hover {
    background: var(--accent);
    color: white;
}

/* Thinking Indicator */
.thinking {
    max-width: 800px;
    margin: 1rem auto 0;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.thinking-text {
    animation: pulse 1.5s ease-in-out infinite;
}

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

.thinking-timer {
    font-family: monospace;
    color: var(--accent);
}

/* Chat Footer */
.chat-footer {
    padding: 1rem;
}

/* Attachments Preview */
.attachments-preview {
    max-width: 800px;
    margin: 0 auto 0.75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.attachments-preview:empty {
    display: none;
}

.attachment-chip {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.attachment-chip.image {
    padding: 0.25rem;
    padding-right: 0.5rem;
}

.attachment-chip img {
    width: 32px;
    height: 32px;
    object-fit: cover;
    border-radius: 4px;
}

.attachment-chip .attachment-name {
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.attachment-chip .remove-attachment {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.125rem;
    line-height: 0;
    transition: color 0.15s;
}

.attachment-chip .remove-attachment:hover {
    color: #ff6464;
}

.chat-input-form {
    max-width: 800px;
    margin: 0 auto;
}

.input-wrapper {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #1a1a1a;
    transition: border-color 0.2s;
}

.input-wrapper:focus-within {
    border-color: var(--accent);
}

#message-input {
    flex: 1;
    padding: 0.875rem 1rem;
    border: none;
    border-radius: 12px 12px 0 0;
    background: transparent;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    resize: none;
    min-height: 48px;
    max-height: 200px;
    overflow-y: auto;
    line-height: 1.4;
}

#message-input:focus {
    outline: none;
}

.input-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    border-top: 1px solid var(--border);
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.toolbar-btn {
    padding: 0.5rem;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
    line-height: 0;
}

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

.toolbar-btn.send {
    padding: 0.5rem 1rem;
    background: var(--accent);
    color: white;
    font-size: 0.9rem;
    line-height: 1;
}

.toolbar-btn.send:hover {
    background: var(--accent-hover);
}

.toolbar-btn.send:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Model Selector */
.model-selector {
    position: relative;
}

.model-selector-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.625rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.15s;
}

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

.model-selector-btn .model-icon {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.model-selector-btn .chevron {
    opacity: 0.6;
    transition: transform 0.15s;
}

.model-selector.open .model-selector-btn .chevron {
    transform: rotate(180deg);
}

.model-dropdown {
    position: absolute;
    bottom: calc(100% + 0.5rem);
    left: 0;
    min-width: 220px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 100;
    overflow: hidden;
}

.model-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background 0.15s;
}

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

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

.model-option .option-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.model-option .option-icon.brain {
    color: var(--accent);
}

.model-option .option-info {
    flex: 1;
}

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

.model-option .option-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.125rem;
}

.model-option .option-check {
    width: 16px;
    height: 16px;
    color: var(--accent);
    opacity: 0;
}

.model-option.selected .option-check {
    opacity: 1;
}

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

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

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

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

/* Markdown Content Styles */
.message-bubble .content {
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message-bubble .content pre {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    overflow-x: auto;
    margin: 0.75rem 0;
}

.message-bubble .content pre code {
    background: none;
    padding: 0;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.message-bubble .content code {
    background: var(--bg-tertiary);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}

.message-bubble .content a {
    color: var(--accent);
    text-decoration: none;
}

.message-bubble .content a:hover {
    text-decoration: underline;
}

.message-bubble .content strong {
    font-weight: 600;
}

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

/* Chat Images */
.chat-image {
    max-width: 100%;
    max-height: 400px;
    border-radius: 8px;
    cursor: pointer;
    margin: 0.75rem 0;
    display: block;
    transition: transform 0.2s, box-shadow 0.2s;
}

.chat-image:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* Tools Button in Sidebar */
.tools-btn {
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.625rem 1rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

/* Tools Panel */
.tools-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 400px;
    max-width: 100vw;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    z-index: 100;
    display: flex;
    flex-direction: column;
    transform: translateX(0);
    transition: transform 0.3s ease;
}

.tools-panel.hidden {
    transform: translateX(100%);
    display: flex;
}

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

.tools-panel-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.close-tools-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    line-height: 1;
    transition: color 0.15s;
}

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

/* Tools List */
.tools-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.tool-card {
    padding: 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.15s;
}

.tool-card:hover {
    border-color: var(--accent);
    transform: translateX(4px);
}

.tool-card-name {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.tool-card-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Tool Form Container */
.tool-form-container {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.25rem;
}

.tool-form-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.back-btn:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.tool-form-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.tool-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

/* Tool Form */
#tool-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-field label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-field label .required {
    color: #ff6464;
    margin-left: 0.25rem;
}

.form-field input,
.form-field select,
.form-field textarea {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.form-field textarea {
    min-height: 100px;
    resize: vertical;
}

.form-field select {
    cursor: pointer;
}

.form-field .field-description {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.form-submit-btn {
    padding: 0.875rem 1.5rem;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 0.5rem;
}

.form-submit-btn:hover {
    background: var(--accent-hover);
}

.form-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Tool Result */
.tool-result {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
}

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

.tool-result.error {
    border-color: #ff6464;
}

.tool-result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.tool-result-title {
    font-weight: 600;
    font-size: 0.95rem;
}

.tool-result.success .tool-result-title {
    color: var(--accent);
}

.tool-result.error .tool-result-title {
    color: #ff6464;
}

.tool-result-content {
    font-size: 0.9rem;
    line-height: 1.5;
}

.tool-result-content pre {
    background: var(--bg-secondary);
    padding: 0.75rem;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.85rem;
}

.tool-result-image {
    max-width: 100%;
    border-radius: 8px;
    margin-top: 0.75rem;
}

/* Image Actions */
.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: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

.image-action-btn.copied {
    border-color: var(--accent);
    color: var(--accent);
}

/* Execution Timer */
.execution-timer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.execution-timer .timer-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.execution-timer .timer-text {
    animation: pulse 1.5s ease-in-out infinite;
}

.execution-timer .timer-elapsed {
    font-family: monospace;
    color: var(--accent);
}