/* TensorAgent - Chat UI Styles */

:root {
    --bg-primary: #0f0f14;
    --bg-secondary: #1a1a24;
    --bg-tertiary: #24243a;
    --text-primary: #e4e4ef;
    --text-secondary: #9d9db5;
    --accent: #7c6cf0;
    --accent-hover: #9588f7;
    --green: #4ade80;
    --orange: #fb923c;
    --red: #f87171;
    --blue: #60a5fa;
    --border: #2a2a3e;
    --code-bg: #12121c;
    --thinking-bg: #1a1a2e;
    --tool-bg: #141420;
}

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

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

/* Layout */
.app {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

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

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--text-primary);
}

.new-chat-btn {
    width: 100%;
    margin-top: 12px;
    padding: 10px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.2s;
}

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

.model-selector {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.model-selector label {
    display: block;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.model-selector select {
    width: 100%;
    padding: 8px 10px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    outline: none;
}

.model-selector select:focus {
    border-color: var(--accent);
}

.sidebar-sessions {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.session-item {
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: background 0.15s;
}

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

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-secondary);
}

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
}

.status-dot.connected { background: var(--green); }
.status-dot.disconnected { background: var(--red); }

/* Main chat area */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

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

.chat-header h2 {
    font-size: 16px;
    font-weight: 600;
}

.header-badges {
    display: flex;
    gap: 8px;
}

.badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
}

.badge.model {
    background: var(--bg-tertiary);
    color: var(--accent);
    border: 1px solid var(--accent);
}

.badge.tools {
    background: var(--bg-tertiary);
    color: var(--green);
    border: 1px solid var(--green);
}

/* Messages */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    scroll-behavior: smooth;
}

.message {
    max-width: 860px;
    margin: 0 auto 20px auto;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.message-role {
    font-size: 13px;
    font-weight: 600;
}

.message-role.user { color: var(--blue); }
.message-role.assistant { color: var(--accent); }

.message-time {
    font-size: 11px;
    color: var(--text-secondary);
}

.message-content {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-primary);
}

.message-content p {
    margin-bottom: 10px;
}

/* Thinking blocks */
.thinking-block {
    background: var(--thinking-bg);
    border-left: 3px solid var(--accent);
    padding: 12px 16px;
    margin: 8px 0;
    border-radius: 0 8px 8px 0;
    font-size: 13px;
    color: var(--text-secondary);
    max-height: 200px;
    overflow-y: auto;
}

.thinking-block summary {
    cursor: pointer;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 6px;
}

/* Tool usage blocks */
.tool-block {
    background: var(--tool-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin: 8px 0;
    overflow: hidden;
}

.tool-header {
    padding: 8px 14px;
    background: var(--bg-tertiary);
    font-size: 12px;
    font-weight: 600;
    color: var(--orange);
    display: flex;
    align-items: center;
    gap: 6px;
}

.tool-content {
    padding: 10px 14px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 12px;
    color: var(--text-secondary);
    max-height: 150px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Code blocks */
.message-content pre {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    overflow-x: auto;
    margin: 10px 0;
    position: relative;
}

.message-content pre code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-primary);
}

.message-content code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}

.copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 11px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
}

.message-content pre:hover .copy-btn {
    opacity: 1;
}

/* Input area */
.input-area {
    padding: 16px 24px 24px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.input-wrapper {
    max-width: 860px;
    margin: 0 auto;
    position: relative;
}

.input-wrapper textarea {
    width: 100%;
    padding: 14px 60px 14px 16px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    font-family: inherit;
    font-size: 14px;
    line-height: 1.5;
    resize: none;
    outline: none;
    min-height: 52px;
    max-height: 200px;
    transition: border-color 0.2s;
}

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

.input-wrapper textarea::placeholder {
    color: var(--text-secondary);
}

.send-btn {
    position: absolute;
    right: 10px;
    bottom: 10px;
    width: 36px;
    height: 36px;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.send-btn:hover { background: var(--accent-hover); }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.send-btn svg {
    width: 18px;
    height: 18px;
}

/* Typing indicator */
.typing-indicator {
    display: none;
    max-width: 860px;
    margin: 0 auto 12px auto;
    padding: 8px 14px;
    font-size: 13px;
    color: var(--text-secondary);
}

.typing-indicator.active { display: flex; align-items: center; gap: 8px; }

.typing-dots span {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: blink 1.4s infinite both;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes blink {
    0%, 80%, 100% { opacity: 0.3; }
    40% { opacity: 1; }
}

/* Welcome screen */
.welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-secondary);
}

.welcome h1 {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.welcome p {
    font-size: 15px;
    margin-bottom: 24px;
}

.welcome-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    max-width: 680px;
}

.welcome-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    text-align: left;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.1s;
}

.welcome-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.welcome-card h3 {
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.welcome-card p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* Auth Screen */
.auth-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background: var(--bg-primary);
}

.auth-container {
    width: 400px;
    text-align: center;
}

.auth-logo {
    font-size: 32px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}

.auth-logo span { color: var(--text-primary); }

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 32px;
}

.auth-form {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    text-align: left;
}

.auth-form h2 {
    font-size: 20px;
    margin-bottom: 20px;
    text-align: center;
}

.auth-form input {
    width: 100%;
    padding: 12px 14px;
    margin-bottom: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    font-family: inherit;
}

.auth-form input:focus { border-color: var(--accent); }

.auth-btn {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 10px;
    font-family: inherit;
    transition: background 0.2s;
}

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

.auth-btn.google-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.auth-btn.google-btn:hover { background: var(--border); }

.auth-switch {
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 16px;
}

.auth-switch a { color: var(--accent); text-decoration: none; }
.auth-switch a:hover { text-decoration: underline; }

.auth-error {
    display: none;
    margin-top: 16px;
    padding: 10px 14px;
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid var(--red);
    border-radius: 8px;
    color: var(--red);
    font-size: 13px;
    text-align: center;
}

/* Sidebar enhancements */
.sidebar-section-label {
    padding: 8px 20px 4px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

.session-empty {
    padding: 16px 20px;
    font-size: 13px;
    color: var(--text-secondary);
    text-align: center;
}

.session-item {
    padding: 10px 14px;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 2px;
    transition: background 0.15s;
}

.session-item:hover, .session-item.active {
    background: var(--bg-tertiary);
}

.session-title {
    font-size: 13px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-meta {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* User info in sidebar footer */
.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
}

.user-name {
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 500;
}

.footer-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logout-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    cursor: pointer;
    font-family: inherit;
}

.logout-btn:hover { color: var(--red); border-color: var(--red); }

/* Settings button */
.footer-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.settings-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, border-color 0.2s;
}

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

/* Settings Modal */
.settings-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.settings-overlay.active {
    display: flex;
}

.settings-modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    width: 640px;
    max-width: 95vw;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: fadeIn 0.2s ease;
}

.settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.settings-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.settings-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    padding: 4px;
}

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

.settings-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
}

.settings-tab {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    padding: 12px 16px;
    cursor: pointer;
    font-family: inherit;
    transition: color 0.2s, border-color 0.2s;
}

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

.settings-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.settings-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
}

.settings-panel {
    display: none;
}

.settings-panel.active {
    display: block;
}

.panel-description {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* Add forms */
.add-form {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 16px;
}

.add-form input,
.add-form select {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
    outline: none;
}

.add-form input:focus,
.add-form select:focus {
    border-color: var(--accent);
}

.form-row {
    display: flex;
    gap: 8px;
}

.form-row select {
    width: 40%;
}

.form-row input {
    flex: 1;
}

.add-btn {
    padding: 10px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.2s;
}

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

/* Items list */
.items-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.items-loading {
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
    padding: 20px;
}

.items-empty {
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
    padding: 20px;
}

.item-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    gap: 12px;
}

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

.item-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-detail {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* Toggle switch */
.toggle {
    position: relative;
    width: 36px;
    height: 20px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.2s;
}

.toggle-slider::before {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    left: 2px;
    top: 2px;
    background: white;
    border-radius: 50%;
    transition: transform 0.2s;
}

.toggle input:checked + .toggle-slider {
    background: var(--accent);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(16px);
}

/* Delete button */
.delete-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: color 0.2s, border-color 0.2s;
}

.delete-btn:hover {
    color: var(--red);
    border-color: var(--red);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .welcome-cards { grid-template-columns: 1fr; }
    .auth-container { width: 90%; padding: 0 16px; }
}