/* mcp4xray — X-ray Observatory Theme */

@import url('https://fonts.googleapis.com/css2?family=Source+Sans+3:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Source+Code+Pro:wght@400;500;600&display=swap');

:root {
    /* Deep space — cool blue-black, inspired by Chandra/XMM imagery */
    --bg-primary: #060a15;
    --bg-secondary: #0a1020;
    --bg-sidebar: #0b1225;
    --bg-input: #101c32;
    --bg-user-msg: #122040;
    --bg-assistant-msg: #0a1428;
    --bg-tool: #071020;
    --bg-hover: rgba(46, 138, 204, 0.04);

    /* Cool silver text — like starlight through a detector */
    --text-primary: #cdd8e6;
    --text-secondary: #7b90a8;
    --text-muted: #4a5f78;

    /* Chandra steel blue accent */
    --accent: #2e8acc;
    --accent-hover: #4aa0e0;
    --accent-glow: rgba(46, 138, 204, 0.15);
    --accent-subtle: rgba(46, 138, 204, 0.06);

    /* Supporting colors — X-ray false color palette */
    --violet: #9b8afb;
    --border: #142040;
    --border-subtle: rgba(255, 255, 255, 0.04);
    --error: #e85d52;
    --error-bg: rgba(232, 93, 82, 0.08);
    --success: #4ecdc4;
    --success-bg: rgba(78, 205, 196, 0.08);

    /* Spacing & shape */
    --radius: 6px;
    --radius-lg: 10px;
    --sidebar-width: 272px;

    /* Typography */
    --font-body: 'Source Sans 3', 'Source Sans Pro', Helvetica, Arial, sans-serif;
    --font-display: Helvetica, 'Source Sans 3', Arial, sans-serif;
    --font-mono: 'Source Code Pro', 'SF Mono', 'Consolas', monospace;
}

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

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    font-feature-settings: 'kern' 1, 'liga' 1;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--violet);
    text-decoration: none;
    transition: color 0.15s;
}

a:hover {
    color: var(--accent);
    text-decoration: underline;
}

/* ==================== Auth Page ==================== */

.auth-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background:
        radial-gradient(ellipse at 50% 30%, rgba(46, 138, 204, 0.04) 0%, transparent 60%),
        var(--bg-primary);
}

.auth-box {
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 36px;
    width: 100%;
    max-width: 400px;
    position: relative;
}

.auth-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
}

.auth-box h1 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
    letter-spacing: 0.02em;
}

.auth-box .subtitle {
    color: var(--text-muted);
    margin-bottom: 24px;
    font-size: 0.88rem;
    letter-spacing: 0.01em;
}

.auth-box .form-group {
    margin-bottom: 16px;
}

.auth-box label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.74rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.auth-box input[type="text"],
.auth-box input[type="password"] {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 1.0rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.auth-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.auth-box button[type="submit"] {
    width: 100%;
    padding: 10px;
    margin-top: 8px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: background 0.15s, transform 0.1s;
}

.auth-box button[type="submit"]:hover {
    background: var(--accent-hover);
}

.auth-box button[type="submit"]:active {
    transform: scale(0.98);
}

.auth-box button[type="submit"]:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.auth-box .toggle-link {
    display: block;
    text-align: center;
    margin-top: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.auth-box .toggle-link a {
    color: var(--accent);
}

.error-message {
    background: var(--error-bg);
    border: 1px solid rgba(232, 93, 82, 0.25);
    border-radius: var(--radius);
    color: var(--error);
    padding: 8px 12px;
    margin-bottom: 16px;
    font-size: 0.88rem;
    display: none;
}

.error-message.visible {
    display: block;
}

.hidden {
    display: none !important;
}

/* ==================== Layout ==================== */

#app {
    display: flex;
    height: 100vh;
}

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

#sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    overflow: hidden;
    transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

#sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
}

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

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 16px 16px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.02em;
}

#sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: color 0.15s, background 0.15s;
}

#sidebar-toggle:hover {
    background: var(--accent-subtle);
    color: var(--text-secondary);
}

.admin-link {
    font-size: 0.74rem;
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 8px;
    transition: color 0.15s;
}

.admin-link:hover {
    color: var(--accent);
}

/* ==================== Auth Section in Sidebar ==================== */

#auth-section {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.95rem;
}

#user-name {
    font-weight: 500;
    color: var(--text-primary);
}

.btn-link {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.84rem;
    text-decoration: none;
    transition: color 0.15s;
}

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

/* ==================== Selectors ==================== */

#server-selector,
#model-selector {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
}

#server-selector label,
#model-selector label {
    display: block;
    font-family: var(--font-body);
    font-size: 0.74rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

#server-select,
#model-select {
    width: 100%;
    padding: 6px 8px;
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 0.88rem;
    transition: border-color 0.15s;
}

#server-select:focus,
#model-select:focus {
    outline: none;
    border-color: var(--accent);
}

/* ==================== Info Link ==================== */

.info-link {
    font-size: 0.72rem;
    font-weight: 400;
    color: var(--text-muted);
    text-transform: none;
    letter-spacing: 0;
    margin-left: 4px;
    text-decoration: none;
    transition: color 0.15s;
}

.info-link:hover {
    color: var(--accent);
    text-decoration: underline;
}

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

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 580px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 2px 8px;
    border-radius: 4px;
    transition: color 0.15s, background 0.15s;
    line-height: 1;
}

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

.modal-body {
    padding: 16px 20px 20px;
    overflow-y: auto;
    font-size: 0.92rem;
    line-height: 1.55;
}

.modal-loading {
    color: var(--text-muted);
    font-style: italic;
    padding: 20px 0;
    text-align: center;
}

.modal-error {
    color: var(--error);
    padding: 12px 0;
}

.modal-section {
    margin-bottom: 16px;
}

.modal-section:last-child {
    margin-bottom: 0;
}

.modal-section-title {
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
}

.modal-instructions {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.5;
    padding: 8px 12px;
    background: var(--bg-tool);
    border-radius: var(--radius);
    border: 1px solid var(--border-subtle);
}

.modal-url {
    font-family: var(--font-mono);
    font-size: 0.80rem;
    color: var(--text-muted);
    word-break: break-all;
}

.modal-tool {
    padding: 8px 12px;
    background: var(--bg-tool);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    margin-bottom: 6px;
}

.modal-tool:last-child {
    margin-bottom: 0;
}

.modal-tool-name {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--accent);
}

.modal-tool-desc {
    font-size: 0.84rem;
    color: var(--text-secondary);
    margin-top: 2px;
    line-height: 1.4;
}

.modal-tool-params {
    margin-top: 6px;
    font-size: 0.80rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.modal-tool-params span {
    display: inline-block;
    background: rgba(46, 138, 204, 0.08);
    padding: 1px 6px;
    border-radius: 3px;
    margin-right: 4px;
    margin-bottom: 2px;
}

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

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

.settings-desc {
    font-size: 0.84rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.4;
}

.settings-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.settings-field label {
    display: block;
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 5px;
}

.key-input-row {
    display: flex;
    gap: 6px;
    align-items: center;
}

.key-input-row input {
    flex: 1;
    padding: 8px 12px;
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 0.84rem;
    transition: border-color 0.2s;
    outline: none;
}

.key-input-row input:focus {
    border-color: var(--accent);
}

.key-input-row input::placeholder {
    color: var(--text-muted);
    font-family: var(--font-body);
}

.key-toggle,
.key-clear {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px 8px;
    font-size: 0.84rem;
    transition: color 0.15s, border-color 0.15s;
    line-height: 1;
    flex-shrink: 0;
}

.key-toggle-eye {
    font-size: 1.1rem;
    line-height: 1;
    padding: 4px 7px;
}

.key-toggle:hover,
.key-clear:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.key-clear:hover {
    color: var(--error);
    border-color: var(--error);
}

.key-status {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 3px;
    min-height: 1em;
}

.key-status.has-key {
    color: var(--success);
}

.key-status.saved {
    color: var(--accent);
}

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

.btn {
    display: block;
    width: 100%;
    padding: 8px 12px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 500;
    margin-bottom: 6px;
    transition: opacity 0.15s, transform 0.1s;
    letter-spacing: 0.01em;
}

.btn:hover {
    opacity: 0.88;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    margin: 14px 16px;
    width: calc(100% - 32px);
    letter-spacing: 0.02em;
}

.btn-primary:hover {
    background: var(--accent-hover);
    opacity: 1;
}

/* ==================== Chat List ==================== */

#chat-list {
    flex: 1;
    overflow-y: auto;
    padding: 6px 0;
}

.chat-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-subtle);
    transition: background 0.15s;
}

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

.chat-item.active {
    background: var(--accent-glow);
    border-left: 2px solid var(--accent);
}

.chat-item-title {
    font-size: 0.90rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.chat-item-date {
    font-size: 0.74rem;
    color: var(--text-muted);
    margin-left: 8px;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.chat-item-delete {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px 6px;
    margin-left: 2px;
    border-radius: 4px;
    font-size: 0.84rem;
    opacity: 0;
    transition: opacity 0.15s, color 0.15s;
    flex-shrink: 0;
}

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

.chat-item-delete:hover {
    color: var(--error);
}

/* ==================== Sidebar Drag Handle ==================== */

#sidebar-drag-handle {
    position: absolute;
    top: 0;
    right: -3px;
    width: 6px;
    height: 100%;
    cursor: col-resize;
    z-index: 10;
    background: transparent;
    transition: background 0.15s;
}

#sidebar-drag-handle:hover,
#sidebar-drag-handle.dragging {
    background: var(--accent);
    opacity: 0.4;
}

#sidebar.collapsed #sidebar-drag-handle {
    display: none;
}

#sidebar.resizing {
    transition: none;
}

/* ==================== Sidebar Expand Button ==================== */

#sidebar-expand-btn {
    display: none;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 50;
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    padding: 6px 10px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: background 0.15s, color 0.15s;
}

#sidebar-expand-btn:hover {
    background: var(--accent-subtle);
    color: var(--accent);
}

#sidebar.collapsed ~ #sidebar-expand-btn {
    display: block;
}

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

#sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 90;
}

/* ==================== Main Chat Area ==================== */

#main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(46, 138, 204, 0.02) 0%, transparent 60%),
        var(--bg-primary);
}

#messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 20px;
    scroll-behavior: smooth;
}

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

.message {
    max-width: 780px;
    margin: 0 auto 16px;
    padding: 12px 16px;
    border-radius: var(--radius);
    line-height: 1.65;
}

.message-user {
    background: var(--bg-user-msg);
    margin-left: 80px;
    border: 1px solid var(--border);
}

.message-assistant {
    background: var(--bg-assistant-msg);
}

.message-role {
    font-family: var(--font-display);
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.message-content {
    font-size: 1.0rem;
    word-wrap: break-word;
    white-space: pre-wrap;
    line-height: 1.65;
}

.message-content p {
    margin-bottom: 0.5em;
}

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

/* ==================== Turn Container (Streaming) ==================== */

.turn {
    max-width: 780px;
    margin: 0 auto 16px;
}

.turn-text {
    background: var(--bg-assistant-msg);
    padding: 14px 18px;
    border-radius: var(--radius);
    margin-bottom: 4px;
    line-height: 1.65;
    font-size: 1.0rem;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.turn-text p { margin-bottom: 0.5em; }
.turn-text p:last-child { margin-bottom: 0; }

/* ==================== Tool Blocks ==================== */

.tool-block {
    background: var(--bg-tool);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin: 6px 0;
    overflow: hidden;
    font-size: 0.88rem;
}

.tool-block-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    color: var(--text-secondary);
    font-weight: 600;
    font-family: var(--font-body);
    letter-spacing: 0.01em;
}

.tool-block-header .spinner {
    width: 13px;
    height: 13px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

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

.tool-check {
    color: var(--success);
    font-weight: bold;
    font-size: 0.92rem;
    flex-shrink: 0;
}

.tool-block-name {
    flex: 1;
}

.tool-block-args {
    padding: 0 12px 8px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.55;
    white-space: pre-wrap;
    word-break: break-all;
    border-top: 1px solid var(--border-subtle);
    padding-top: 6px;
    margin-top: 0;
    display: none;
}

.tool-block-args code {
    background: none;
    padding: 0;
    font-size: inherit;
    color: var(--text-secondary);
}

.tool-block-args.visible {
    display: block;
}

.tool-block-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.78rem;
    padding: 2px 6px;
    border-radius: 3px;
    transition: color 0.15s, background 0.15s;
    flex-shrink: 0;
}

.tool-block-toggle:hover {
    color: var(--text-secondary);
    background: var(--accent-subtle);
}

.tool-block-result {
    padding: 0 12px 8px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.55;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 300px;
    overflow-y: auto;
    border-top: 1px solid var(--border-subtle);
    padding-top: 6px;
    display: none;
}

.tool-block-result.visible {
    display: block;
}

.tool-block.complete {
    border-color: rgba(78, 204, 163, 0.15);
}

.tool-block.error {
    border-color: rgba(232, 93, 82, 0.25);
}

.stopped-note {
    color: var(--text-muted);
    font-size: 0.84rem;
    font-style: italic;
    padding: 4px 0;
}

/* ==================== Loading Indicator ==================== */

.loading-indicator {
    max-width: 780px;
    margin: 8px auto;
    display: flex;
    justify-content: center;
}

.loading-indicator-inner {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--bg-assistant-msg);
    border-radius: var(--radius);
}

.loading-asterisk {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    display: inline-block;
    animation: asterisk-spin 2s linear infinite;
    text-shadow: 0 0 8px var(--accent-glow);
}

@keyframes asterisk-spin {
    0% {
        transform: rotate(0deg);
        opacity: 0.6;
    }
    25% {
        opacity: 1;
    }
    50% {
        transform: rotate(180deg);
        opacity: 0.6;
    }
    75% {
        opacity: 1;
    }
    100% {
        transform: rotate(360deg);
        opacity: 0.6;
    }
}

.loading-word {
    font-size: 0.92rem;
    color: var(--text-secondary);
    font-style: italic;
    letter-spacing: 0.01em;
    transition: opacity 0.2s ease;
}

/* ==================== Error in Chat ==================== */

.chat-error {
    background: var(--error-bg);
    border: 1px solid rgba(232, 93, 82, 0.25);
    border-radius: var(--radius);
    padding: 10px 14px;
    color: var(--error);
    font-size: 0.95rem;
    margin: 8px auto;
    max-width: 780px;
}

/* ==================== Markdown Rendering ==================== */

.message-content h1, .message-content h2, .message-content h3,
.turn-text h1, .turn-text h2, .turn-text h3 {
    font-family: var(--font-display);
    margin-top: 0.8em;
    margin-bottom: 0.4em;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.message-content h1, .turn-text h1 { font-size: 1.35rem; font-weight: 700; }
.message-content h2, .turn-text h2 { font-size: 1.15rem; font-weight: 600; }
.message-content h3, .turn-text h3 { font-size: 1.02rem; font-weight: 600; }

.message-content code, .turn-text code {
    background: rgba(46, 138, 204, 0.06);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.88em;
    color: var(--accent-hover);
}

.message-content pre, .turn-text pre {
    background: rgba(0, 0, 0, 0.35);
    padding: 12px 14px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 8px 0;
    border: 1px solid var(--border);
}

.message-content pre code, .turn-text pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.86rem;
    line-height: 1.55;
}

.message-content ul, .message-content ol,
.turn-text ul, .turn-text ol {
    padding-left: 1.5em;
    margin: 0.5em 0;
}

.message-content a, .turn-text a {
    color: var(--violet);
    text-decoration: none;
    transition: color 0.15s;
}

.message-content a:hover, .turn-text a:hover {
    color: var(--accent);
    text-decoration: underline;
}

/* ==================== Data Tables ==================== */

.table-container {
    margin: 8px 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-tool);
}

.table-header {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 6px 14px;
    background: rgba(0, 0, 0, 0.2);
}

.table-download-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--accent);
    padding: 3px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: background 0.15s, border-color 0.15s;
}

.table-download-btn:hover {
    background: var(--accent-subtle);
    border-color: var(--accent);
}

.table-scroll {
    overflow-x: auto;
    overflow-y: auto;
    max-height: 400px;
}

.data-table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.84rem;
    font-family: var(--font-mono);
}

.data-table th {
    position: sticky;
    top: 0;
    background: var(--bg-sidebar);
    padding: 7px 10px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    font-weight: 600;
    font-size: 0.78rem;
    color: var(--text-secondary);
    z-index: 1;
    letter-spacing: 0.02em;
}

.data-table th.sortable {
    cursor: pointer;
    user-select: none;
    padding-right: 20px;
    position: relative;
    transition: color 0.15s;
}

.data-table th.sortable:hover {
    color: var(--accent);
}

.data-table th.sortable::after {
    content: '\2195';
    position: absolute;
    right: 4px;
    opacity: 0.25;
    font-size: 0.74rem;
}

.data-table th.sort-asc::after {
    content: '\25B2';
    opacity: 0.7;
    color: var(--accent);
}

.data-table th.sort-desc::after {
    content: '\25BC';
    opacity: 0.7;
    color: var(--accent);
}

.data-table td {
    padding: 4px 10px;
    border-bottom: 1px solid var(--border-subtle);
    white-space: nowrap;
    color: var(--text-primary);
}

.data-table td a {
    color: var(--violet);
    text-decoration: none;
}

.data-table td a:hover {
    color: var(--accent);
    text-decoration: underline;
}

.data-table tr:hover td {
    background: var(--bg-hover);
}

.table-footer {
    padding: 6px 14px;
    font-size: 0.78rem;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.12);
    border-top: 1px solid var(--border-subtle);
}

/* Legacy inline markdown tables (non-sortable fallback) */
.message-content table, .turn-text table {
    border-collapse: collapse;
    width: 100%;
    margin: 8px 0;
    font-size: 0.88rem;
}

.message-content th, .message-content td,
.turn-text th, .turn-text td {
    border: 1px solid var(--border);
    padding: 6px 10px;
    text-align: left;
}

.message-content th, .turn-text th {
    background: rgba(0, 0, 0, 0.25);
    font-weight: 600;
    font-size: 0.84rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

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

#input-area {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    padding: 16px 20px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
    max-width: 840px;
    margin: 0 auto;
    width: 100%;
}

#user-input {
    flex: 1;
    padding: 10px 14px;
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 1.0rem;
    resize: none;
    min-height: 42px;
    max-height: 200px;
    line-height: 1.45;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#user-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

#user-input::placeholder {
    color: var(--text-muted);
}

#send-btn {
    padding: 10px 22px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.92rem;
    letter-spacing: 0.03em;
    transition: background 0.15s, transform 0.1s;
    white-space: nowrap;
}

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

#send-btn:active {
    transform: scale(0.97);
}

#send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

#send-btn.stop {
    background: var(--error);
    color: #fff;
}

#send-btn.stop:hover {
    background: #f47067;
}

/* ==================== Disclaimer ==================== */

#disclaimer {
    text-align: center;
    font-size: 0.74rem;
    color: var(--text-muted);
    padding: 4px 20px 12px;
    max-width: 840px;
    margin: 0 auto;
    width: 100%;
    line-height: 1.4;
}

#disclaimer a {
    color: var(--text-muted);
    text-decoration: underline;
    transition: color 0.15s;
}

#disclaimer a:hover {
    color: var(--accent);
}

/* ==================== Empty State ==================== */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
    gap: 12px;
    padding: 40px 20px;
}

.empty-state-icon {
    font-size: 3rem;
    opacity: 0.3;
    line-height: 1;
}

.empty-state h2 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 0.92rem;
    max-width: 400px;
}

/* ==================== Scrollbar ==================== */

::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

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

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

@supports (height: 100dvh) {
    body, #app { height: 100dvh; }
}

@media (max-width: 768px) {
    body, #app {
        height: 100dvh;
        height: 100vh;
    }

    #sidebar {
        position: fixed;
        z-index: 100;
        height: 100dvh;
        height: 100vh;
        top: 0;
        left: 0;
    }

    #sidebar.collapsed {
        width: 0;
    }

    #sidebar:not(.collapsed) ~ #sidebar-overlay {
        display: block;
    }

    #sidebar.collapsed ~ #sidebar-expand-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        padding: 0;
        font-size: 1.3rem;
    }

    .btn, #send-btn, #new-chat-btn {
        min-height: 44px;
        font-size: 1rem;
    }

    .chat-item {
        padding: 12px 16px;
        min-height: 44px;
    }

    .chat-item-delete {
        padding: 8px 10px;
        min-width: 36px;
        min-height: 36px;
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 1;
    }

    .message-user {
        margin-left: 20px;
    }

    #input-area {
        padding: 10px 12px 14px;
        gap: 8px;
    }

    #user-input {
        font-size: 16px;
        padding: 10px 12px;
    }

    #send-btn {
        padding: 10px 16px;
        min-width: 44px;
    }

    #messages {
        padding: 16px 12px;
    }

    .message {
        padding: 10px 12px;
    }

    #disclaimer {
        font-size: 0.68rem;
        padding: 4px 12px 8px;
    }

    #sidebar-drag-handle {
        display: none;
    }

    .auth-box {
        padding: 28px 24px;
    }
}