/* CSS Variables */
:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f0f1a;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --accent-primary: #4f8cff;
    --accent-success: #4caf50;
    --accent-warning: #ff9800;
    --accent-danger: #f44336;
    --border-color: #2a2a4a;
    --terminal-bg: #0d0d0d;
    --terminal-text: #00ff00;
    --sidebar-width: 240px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    /* Prevent mobile pull-to-refresh and overscroll bounce */
    overscroll-behavior: none;
}

/* App Container — use fixed positioning to avoid dvh jitter on mobile */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 24px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    gap: 16px;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--accent-danger);
}

.status-dot.connected {
    background-color: var(--accent-success);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Layout Controls */
.layout-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    margin-right: 16px;
}

.layout-btn {
    padding: 6px 10px !important;
    font-size: 18px !important;
    line-height: 1;
    min-width: 40px;
    min-height: 36px;
}

.layout-btn.active {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.layout-icon {
    font-size: 16px;
    letter-spacing: 0px;
}

.layout-grid {
    line-height: 1;
    font-size: 14px;
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 18px;
    transition: all 0.2s;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-sm {
    padding: 4px 12px;
    font-size: 16px;
}

.btn-primary {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background-color: #3d7ae8;
}

.btn-danger {
    background-color: var(--accent-danger);
    border-color: var(--accent-danger);
    color: white;
}

.btn-danger:hover {
    background-color: #d32f2f;
}

.btn-block {
    width: 100%;
}

/* Login Panel */
.login-panel {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    background-color: var(--bg-secondary);
    padding: 32px;
    border-radius: 12px;
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border-color);
}

/* Auth Tabs */
.auth-tabs {
    display: flex;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    padding: 12px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

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

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

.login-card h2 {
    margin-bottom: 24px;
    text-align: center;
}

.login-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 16px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.login-tab {
    flex: 1;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: none;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.login-tab.active {
    background: var(--accent-primary);
    color: #fff;
}

.login-tab:hover:not(.active) {
    background: var(--bg-secondary);
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 18px;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 18px;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.2s ease, min-width 0.2s ease;
}

.sidebar.collapsed {
    width: 48px;
    min-width: 48px;
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: 12px 8px;
    cursor: pointer;
    height: 100%;
}

.sidebar.collapsed .sidebar-header:hover {
    background-color: var(--bg-tertiary);
}

.sidebar.collapsed .sidebar-header h3 span:not(.toggle-icon) {
    display: none;
}

.sidebar.collapsed .sidebar-header .btn {
    display: none;
}

.sidebar.collapsed .session-list-wrapper {
    display: none;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 8px;
}

.sidebar-header h3 {
    font-size: 18px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin: 0;
}

.sidebar-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.sidebar-toggle {
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    margin: -8px -12px -8px 0;
    border-radius: 6px;
    flex-shrink: 0;
}

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

.toggle-icon {
    font-size: 22px;
    font-weight: bold;
    transition: transform 0.2s ease;
    color: var(--accent-primary);
}

.sidebar.collapsed .toggle-icon {
    transform: rotate(0deg);
}

.sidebar:not(.collapsed) .toggle-icon {
    transform: rotate(180deg);
}

.session-list-wrapper {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.sidebar-hint {
    padding: 8px 12px;
    font-size: 15px;
    color: var(--text-secondary);
    background-color: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.session-filter {
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.session-filter label {
    font-size: 14px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.creator-filter-select {
    flex: 1;
    padding: 4px 8px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 14px;
}

.creator-filter-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.session-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.session-item {
    padding: 10px;
    border-radius: 6px;
    cursor: pointer;
    margin-bottom: 4px;
    border: 1px solid transparent;
    transition: all 0.2s;
}

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

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

.session-item.in-panel {
    border-left: 3px solid var(--accent-success);
}

.session-item-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
    min-width: 0;
}

.session-item-id {
    font-family: monospace;
    font-size: 15px;
    color: var(--text-secondary);
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.session-item-badges {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.session-item-state {
    font-size: 13px;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: 600;
}

.session-item-state.available {
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--accent-success);
}

.session-item-state.locked {
    background-color: rgba(255, 152, 0, 0.2);
    color: var(--accent-warning);
}

.session-item-state.closed {
    background-color: rgba(244, 67, 54, 0.2);
    color: var(--accent-danger);
}

.session-item-state.crashed {
    background-color: rgba(244, 67, 54, 0.2);
    color: var(--accent-danger);
}

.session-item-owner {
    font-size: 15px;
    color: var(--text-secondary);
}

.session-item-meta {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.session-item-note {
    font-size: 13px;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

.session-item-panel {
    display: inline-block;
    font-size: 14px;
    padding: 1px 6px;
    background-color: var(--accent-primary);
    color: white;
    border-radius: 3px;
    margin-left: 6px;
}

.session-item-dead {
    opacity: 0.6;
    cursor: default;
}

.session-item-dead:hover {
    background-color: transparent;
}

.btn-delete-session {
    background: var(--accent-danger);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 8px;
}

.btn-delete-session:hover {
    background: #d32f2f;
    transform: scale(1.1);
}

.sidebar-footer {
    padding: 10px;
    border-top: 1px solid var(--border-color);
}

.empty-state {
    text-align: center;
    padding: 24px;
    color: var(--text-secondary);
    font-size: 18px;
}

/* Main Panel */
.main-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Panel Grid */
.panel-grid {
    flex: 1;
    display: grid;
    gap: 2px;
    background-color: var(--border-color);
    overflow: hidden;
}

.panel-grid.layout-1 {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
}

.panel-grid.layout-1 .session-panel:nth-child(n+2) {
    display: none;
}

.panel-grid.layout-2 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr;
}

.panel-grid.layout-2 .session-panel:nth-child(n+3) {
    display: none;
}

.panel-grid.layout-4 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
}

/* Session Panel */
.session-panel {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    overflow: hidden;
    position: relative;
    min-height: 0;
}

.panel-empty {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
}

.panel-empty-content {
    text-align: center;
    color: var(--text-secondary);
}

.panel-number {
    display: inline-block;
    font-size: 48px;
    font-weight: 700;
    color: var(--border-color);
    margin-bottom: 8px;
}

.panel-empty-content p {
    font-size: 16px;
}

.panel-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

.panel-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--accent-primary);
    color: white;
    border-radius: 4px;
    font-size: 15px;
    font-weight: 600;
}

/* Session Header */
.session-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    gap: 8px;
}

.session-info {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.session-title-input {
    font-size: 16px;
    font-family: monospace;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    color: var(--text-primary);
    padding: 2px 6px;
    min-width: 60px;
    max-width: 200px;
    cursor: pointer;
    transition: all 0.2s;
}

.session-title-input:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
}

.session-title-input:not([readonly]) {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
    cursor: text;
    outline: none;
}

.session-title-input[readonly] {
    cursor: pointer;
}

.session-title-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.session-state {
    font-size: 13px;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: 600;
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--accent-success);
    white-space: nowrap;
}

.session-state.locked {
    background-color: rgba(255, 152, 0, 0.2);
    color: var(--accent-warning);
}

.cli-type-badge {
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
    background-color: rgba(79, 140, 255, 0.2);
    color: var(--accent-primary);
    white-space: nowrap;
}

.cli-type-badge.codex {
    background-color: rgba(255, 152, 0, 0.2);
    color: var(--accent-warning);
}

/* .panel-note and .note-input removed — merged into .session-title-input */

.session-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.session-actions .btn {
    padding: 3px 8px;
    font-size: 15px;
}

/* Terminal */
.terminal {
    flex: 1;
    background-color: var(--terminal-bg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 0;
    /* Remove height: 0 to let flex handle sizing properly */
}

.terminal-content {
    flex: 1;
    padding: 2px;
    overflow: hidden;
    min-height: 0;
    min-width: 0;
    max-width: 100%;
    /* Minimal padding for better space utilization in 4-panel mode */
}

/* xterm.js container styling */
.terminal-content .xterm {
    height: 100% !important;
    width: 100% !important;
    max-width: 100% !important;
    overflow: hidden !important;
}

.terminal-content .xterm-screen {
    height: 100% !important;
    width: calc(100% - 8px) !important;  /* 留出 scrollbar 空間，避免 canvas 覆蓋 */
    max-width: calc(100% - 8px) !important;
    /* Keep xterm text selection/copy enabled */
    pointer-events: auto;
}

.terminal-content .xterm-rows {
    /* Minimal padding for better fit */
    padding-bottom: 0px;
}

.terminal-content .xterm-viewport {
    overflow-y: auto !important;
    /* Ensure scrollbar is always visible for better UX */
    scrollbar-width: thin;
}

.terminal-content .xterm-viewport::-webkit-scrollbar {
    width: 8px;
}

.terminal-content .xterm-viewport::-webkit-scrollbar-track {
    background: #0d0d0d;
}

.terminal-content .xterm-viewport::-webkit-scrollbar-thumb {
    background: #4f8cff;
    border-radius: 4px;
}

.terminal-content .xterm-viewport::-webkit-scrollbar-thumb:hover {
    background: #6fa3ff;
}

.terminal-line {
    margin-bottom: 2px;
}

.terminal-line.user-input {
    color: #61afef;
}

.terminal-line.user-input::before {
    content: '> ';
    color: var(--accent-primary);
}

.terminal-line.model-output {
    color: var(--terminal-text);
}

.terminal-line.system {
    color: var(--accent-warning);
    font-style: italic;
}

.terminal-line.error {
    color: var(--accent-danger);
}

/* Input Area */
.input-area {
    padding: 12px 16px;
    background-color: var(--bg-secondary);
    border-top: 2px solid var(--accent-primary);
}

.input-area form {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

.input-area textarea {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: monospace;
    font-size: 18px;
    resize: none;
    overflow-y: hidden;
    min-height: 46px;
    max-height: 150px;
    line-height: 1.4;
}

.input-area textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.3);
}

.input-area textarea:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.input-area .btn {
    padding: 12px 20px;
    font-size: 18px;
    font-weight: 600;
}

/* Lease Info */
.lease-info {
    display: flex;
    gap: 16px;
    padding: 4px 12px;
    background-color: var(--bg-tertiary);
    font-size: 14px;
    color: var(--text-secondary);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    min-width: 280px;
}

.modal-content h3 {
    margin-bottom: 8px;
}

.modal-content p {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 16px;
}

.panel-select-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 16px;
}

.panel-select-btn {
    padding: 16px;
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.panel-select-btn:hover {
    border-color: var(--accent-primary);
    background-color: rgba(79, 140, 255, 0.1);
}

.panel-select-btn .panel-number {
    font-size: 32px;
    color: var(--text-primary);
}

.panel-select-btn.occupied .panel-number {
    color: var(--text-secondary);
}

.panel-select-btn.occupied::after {
    content: ' (已使用)';
    font-size: 14px;
    color: var(--text-secondary);
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1000;
}

.toast {
    padding: 10px 16px;
    border-radius: 6px;
    margin-top: 8px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease;
    font-size: 17px;
}

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

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

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

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

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

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

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

/* Login Title */
.login-title {
    text-align: center;
    margin-bottom: 24px;
    color: var(--accent-primary);
}

/* Admin Button */
.btn-admin {
    background-color: var(--accent-warning);
    border-color: var(--accent-warning);
    color: #000;
}

.btn-admin:hover {
    background-color: #e68900;
}

/* Admin Modal */
.admin-modal {
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    overflow-y: auto;
    text-align: left;
}

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

.admin-header h3 {
    margin: 0;
    color: var(--accent-primary);
}

.admin-section {
    margin-bottom: 24px;
}

.admin-section h4 {
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 14px;
    text-transform: uppercase;
}

/* User Table */
.user-list {
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    overflow: hidden;
}

.user-list .loading,
.user-list .error,
.user-list .empty {
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
}

.user-list .error {
    color: var(--accent-danger);
}

.user-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.user-table th,
.user-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.user-table th {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
}

.user-table tr:last-child td {
    border-bottom: none;
}

.user-table tr:hover td {
    background-color: rgba(79, 140, 255, 0.05);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.badge.admin {
    background-color: rgba(255, 152, 0, 0.2);
    color: var(--accent-warning);
}

.badge.user {
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--accent-success);
}

/* Form Row */
.form-row {
    display: flex;
    gap: 12px;
}

.form-row .form-group {
    flex: 1;
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding-top: 24px;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Takeover Button */
.btn-takeover {
    background-color: var(--accent-warning);
    border-color: var(--accent-warning);
    color: #000;
}

.btn-takeover:hover {
    background-color: #e68900;
}

/* Create Session Modal */
.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 16px;
    box-sizing: border-box;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 20px;
}

#createSessionModal .modal-content {
    min-width: 400px;
    max-width: 500px;
    text-align: left;
}

#createSessionModal .modal-content h3 {
    text-align: center;
    margin-bottom: 20px;
}

/* Git Log Button */
.btn-gitlog {
    background-color: rgba(79, 140, 255, 0.15);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-gitlog:hover {
    background-color: rgba(79, 140, 255, 0.3);
}

/* Git Log Modal */
.git-log-modal {
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow: hidden;
    text-align: left;
    display: flex;
    flex-direction: column;
}

.git-log-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.git-log-header h3 {
    margin: 0;
    color: var(--accent-primary);
}

.git-log-cwd {
    flex: 1;
    font-size: 13px;
    font-family: monospace;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.git-log-body {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

.git-log-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.git-log-table thead {
    position: sticky;
    top: 0;
    z-index: 1;
}

.git-log-table th {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    padding: 8px 10px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.git-log-table td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: top;
}

.git-log-table tr:last-child td {
    border-bottom: none;
}

.git-log-table tr:hover td {
    background-color: rgba(79, 140, 255, 0.05);
}

.git-hash {
    font-family: monospace;
    color: var(--accent-primary);
    white-space: nowrap;
}

.git-author {
    white-space: nowrap;
    color: var(--text-secondary);
}

.git-date {
    white-space: nowrap;
    color: var(--text-secondary);
    font-family: monospace;
    font-size: 13px;
}

.git-message {
    word-break: break-word;
}

/* Toolbar & virtual keyboard — visible on all devices */
.mobile-input-toolbar {
    display: flex;
    gap: 6px;
    margin-bottom: 6px;
}

.btn-mobile-upload {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: 6px 12px;
    font-size: 14px;
    min-height: 36px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
}

.btn-mobile-upload:hover,
.btn-mobile-upload:active {
    background-color: var(--border-color);
    border-color: var(--accent-primary);
}

.btn-mobile-kbd-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    font-size: 18px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    min-width: 44px;
    min-height: 36px;
    transition: all 0.2s;
}

.btn-mobile-kbd-toggle:hover,
.btn-mobile-kbd-toggle:active {
    background-color: var(--border-color);
    border-color: var(--accent-primary);
}

.btn-mobile-kbd-toggle.active {
    background-color: rgba(79, 140, 255, 0.15);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.mobile-virtual-kbd {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease, padding 0.25s ease, margin 0.25s ease;
    padding: 0;
    margin-bottom: 0;
}

.mobile-virtual-kbd.open {
    max-height: 260px;
    padding: 6px 0;
    margin-bottom: 6px;
}

.vkbd-custom-row {
    grid-column: 1 / -1;
    display: flex;
    gap: 6px;
}

.vkbd-custom-input {
    flex: 1;
    min-width: 0;
    min-height: 38px;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: monospace;
    font-size: 13px;
}

.vkbd-custom-input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.vkbd-custom-send {
    min-height: 38px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}

.vkbd-custom-clear {
    min-height: 38px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
}

.vkbd-custom-clear:hover {
    background-color: var(--border-color);
    border-color: var(--accent-primary);
}

.vkbd-custom-send:hover {
    background-color: var(--border-color);
    border-color: var(--accent-primary);
}

.vkbd-key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 6px;
    min-height: 38px;
    font-size: 14px;
    font-weight: 600;
    font-family: monospace;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s;
    user-select: none;
}

.vkbd-key:hover {
    background-color: var(--border-color);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.vkbd-key:active {
    background-color: rgba(79, 140, 255, 0.2);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.vkbd-gap {
    min-height: 38px;
    pointer-events: none;
}

/* Drag & Drop Upload Overlay */
.session-panel.drag-over::after {
    content: '放開以上傳檔案';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(79, 140, 255, 0.25);
    border: 3px dashed var(--accent-primary);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 600;
    color: var(--accent-primary);
    z-index: 100;
    pointer-events: none;
}

/* ============================================================
   Mobile Responsive (≤ 768px)
   — 僅新增規則，不修改上方任何現有 CSS
   ============================================================ */

/* Mobile session selector bar (hidden on desktop, shown on mobile) */
.mobile-session-bar {
    display: none;
}

@media (max-width: 768px) {
    /* === Fixed positioning — immune to mobile URL bar resize === */
    .app-container {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        height: auto;
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }

    /* === Header === */
    .header {
        padding: 8px 12px;
        gap: 8px;
    }

    .header h1 {
        font-size: 1.1rem;
    }

    /* Hide layout controls on mobile — force 1 panel */
    .layout-controls {
        display: none !important;
    }

    .connection-status {
        gap: 4px;
    }

    .connection-status .status-text {
        font-size: 13px;
    }

    .user-info {
        gap: 6px;
    }

    .user-info .btn {
        padding: 6px 10px;
        font-size: 14px;
    }

    /* === Sidebar — hidden on mobile === */
    .sidebar {
        display: none !important;
    }

    /* === Fix viewport overflow — ensure flex/grid chain shrinks within viewport === */
    .main-content {
        min-height: 0;
        min-width: 0;
        max-width: 100%;
        overflow: hidden;
    }

    .main-panel {
        min-height: 0;
        min-width: 0;
        max-width: 100%;
    }

    .panel-grid {
        min-height: 0;
        min-width: 0;
        max-width: 100%;
    }

    .session-panel {
        min-height: 0;
        min-width: 0;
        max-width: 100%;
    }

    .panel-content {
        min-height: 0;
        min-width: 0;
        max-width: 100%;
        /* Use flex instead of grid — handles hidden terminal/chat naturally */
        display: flex;
        flex-direction: column;
        height: 100%;
    }

    .terminal {
        min-height: 0;
        min-width: 0;
        max-width: 100%;
        overflow: hidden;
    }

    .terminal-content {
        padding: 0;
        min-width: 0;
        max-width: 100%;
    }

    /* === Mobile session selector bar — above panel === */
    .mobile-session-bar {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 6px 10px;
        background-color: var(--bg-secondary);
        border-bottom: 1px solid var(--border-color);
        flex-shrink: 0;
    }

    .mobile-session-bar select {
        flex: 1;
        min-width: 0;
        padding: 8px 10px;
        background-color: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        border-radius: 6px;
        color: var(--text-primary);
        font-family: monospace;
        font-size: 14px;
        min-height: 40px;
        appearance: auto;
    }

    .mobile-session-bar select:focus {
        outline: none;
        border-color: var(--accent-primary);
    }

    .mobile-session-bar .btn {
        min-height: 40px;
        min-width: 40px;
        padding: 6px 12px;
        font-size: 14px;
        white-space: nowrap;
    }

    /* Hide "從左側選擇" hint on mobile — select bar replaces it */
    .panel-empty-content p {
        display: none;
    }

    /* === Panel Grid — force single column === */
    .panel-grid.layout-1,
    .panel-grid.layout-2,
    .panel-grid.layout-4 {
        grid-template-columns: 1fr !important;
        grid-template-rows: 1fr !important;
    }

    /* Hide panels 2-4 on mobile (always 1 panel) */
    .panel-grid .session-panel:nth-child(n+2) {
        display: none !important;
    }

    /* === Session Header (panel title bar) === */
    /* Select bar already shows session info, so hide redundant details */
    .session-header {
        padding: 4px 10px;
        gap: 6px;
        flex-shrink: 0;
    }

    /* Simplify session info on mobile — hide state/CLI badges but keep title editable */
    .session-info .session-state,
    .session-info .cli-type-badge,
    .session-info .panel-badge {
        display: none;
    }

    .session-title-input {
        font-size: 14px;
        max-width: 150px;
    }

    /* Action buttons take full width */
    .session-actions {
        flex: 1;
        justify-content: flex-end;
    }

    .session-actions .btn {
        padding: 4px 10px;
        font-size: 13px;
        min-height: 36px;
        min-width: 36px;
    }

    /* === Input Area === */
    .input-area {
        padding: 8px 10px;
        flex-shrink: 0;
        position: relative;
        z-index: 2;
    }

    .input-area form {
        gap: 6px;
    }

    /* Textarea: compact when not focused, expand on focus */
    /* font-size ≥ 16px 防止 iOS Safari 自動放大 */
    .input-area textarea {
        padding: 8px 12px;
        font-size: 16px;
        min-height: 40px;
        max-height: 40px;
        resize: none;
        transition: max-height 0.2s ease;
    }

    .input-area textarea.mobile-expanded {
        max-height: 120px;
        resize: vertical;
    }

    .input-area .btn {
        padding: 10px 14px;
        font-size: 15px;
    }

    /* === Mobile overrides for toolbar & virtual keyboard === */
    .btn-mobile-kbd-toggle {
        min-height: 40px;
    }

    .btn-mobile-upload {
        min-height: 40px;
        font-size: 15px;
    }

    .vkbd-key {
        padding: 10px 6px;
        min-height: 44px;
        -webkit-tap-highlight-color: transparent;
    }

    .vkbd-custom-input,
    .vkbd-custom-clear,
    .vkbd-custom-send {
        min-height: 44px;
    }

    /* === Lease Info — hidden on mobile, not useful === */
    .lease-info {
        display: none;
    }

    /* === Modal === */
    .modal-content {
        min-width: unset !important;
        width: 95vw !important;
        max-width: 95vw !important;
        padding: 16px;
    }

    #createSessionModal .modal-content {
        min-width: unset !important;
        max-width: 95vw !important;
        width: 95vw !important;
    }

    .admin-modal {
        width: 95vw !important;
        max-width: 95vw !important;
    }

    .panel-select-grid {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }

    /* === Touch Optimization — larger tap targets === */
    .btn {
        min-height: 44px;
        min-width: 44px;
    }

    .btn-sm {
        min-height: 36px;
        min-width: 36px;
    }

    .btn-delete-session {
        min-height: 36px;
        min-width: 36px;
        padding: 4px 10px;
    }

    .auth-tab {
        min-height: 44px;
    }

    /* === Toast — move to top on mobile === */
    .toast-container {
        bottom: auto;
        top: 12px;
        right: 12px;
        left: 12px;
    }

    .toast {
        font-size: 14px;
    }

    /* === Login panel === */
    .login-card {
        margin: 16px;
        padding: 24px 20px;
    }

    .form-group label {
        font-size: 15px;
    }

    .form-group input {
        font-size: 16px;
    }

    /* === User table (admin) — horizontal scroll === */
    .user-list {
        overflow-x: auto;
    }

    .user-table {
        min-width: 500px;
    }

    /* === Form row stack on mobile === */
    .form-row {
        flex-direction: column;
        gap: 0;
    }

    /* Checkbox label — remove top padding on mobile */
    .checkbox-label {
        padding-top: 8px;
    }

    /* === Form controls — touch-friendly sizing === */
    .form-control {
        min-height: 44px;
        padding: 12px 14px;
    }

    /* Modal max-height to prevent overflow on small screens */
    .modal-content {
        max-height: 90vh;
        overflow-y: auto;
    }

    /* === Git Log Modal — mobile === */
    .git-log-modal {
        width: 95vw !important;
        max-width: 95vw !important;
        max-height: 85vh;
    }

    .git-log-table {
        font-size: 13px;
    }

    .git-log-table th,
    .git-log-table td {
        padding: 6px 8px;
    }

    /* Hide author column on mobile to save space */
    .git-log-table th:nth-child(2),
    .git-log-table td:nth-child(2) {
        display: none;
    }

    /* === Chat Mode — mobile === */
    .chat-container {
        flex: 1;
        min-height: 0;
        padding: 8px;
        -webkit-overflow-scrolling: touch;
    }

    .chat-bubble {
        max-width: 92%;
        padding: 8px 12px;
        font-size: 0.88rem;
    }

    .chat-bubble .chat-content pre {
        font-size: 0.8rem;
        padding: 6px 10px;
        max-width: 100%;
        overflow-x: auto;
    }

    .chat-bubble .chat-content code {
        font-size: 0.8rem;
        word-break: break-all;
    }

    .chat-bubble .chat-content table {
        font-size: 0.8rem;
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .btn-mode-toggle {
        min-height: 36px;
        min-width: 36px;
        font-size: 1rem;
    }
}

/* ===== Chat Mode ===== */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    background: #1a1a2e;
}

.chat-messages {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chat-bubble {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 0.9rem;
    line-height: 1.5;
    word-wrap: break-word;
}

.chat-bubble.user {
    align-self: flex-end;
    background: #0f3460;
    color: #e0e0e0;
    border-bottom-right-radius: 4px;
}

.chat-bubble.assistant {
    align-self: flex-start;
    background: #16213e;
    color: #e0e0e0;
    border: 1px solid #0f3460;
    border-bottom-left-radius: 4px;
}

.chat-bubble .chat-role {
    font-size: 0.75rem;
    color: #64ffda;
    margin-bottom: 4px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.chat-source-badge {
    font-size: 0.6rem;
    padding: 1px 5px;
    border-radius: 3px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.chat-source-badge.fallback {
    background: rgba(255, 170, 50, 0.15);
    color: #ffaa32;
    border: 1px solid rgba(255, 170, 50, 0.3);
}

.chat-bubble .chat-content {
    color: #e0e0e0;
}

.chat-bubble .chat-content p {
    margin: 0 0 0.5em 0;
}

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

.chat-bubble .chat-content pre {
    background: #0d1117;
    padding: 8px 12px;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.85rem;
    margin: 0.5em 0;
}

.chat-bubble .chat-content code {
    background: #0d1117;
    padding: 2px 5px;
    border-radius: 3px;
    font-size: 0.85rem;
}

.chat-bubble .chat-content pre code {
    background: none;
    padding: 0;
}

.chat-bubble .chat-content ul,
.chat-bubble .chat-content ol {
    margin: 0.3em 0;
    padding-left: 1.5em;
}

.chat-bubble .chat-time {
    font-size: 0.7rem;
    color: #666;
    margin-top: 4px;
    text-align: right;
}

.chat-typing {
    align-self: flex-start;
    padding: 10px 14px;
    color: #888;
    font-style: italic;
    font-size: 0.85rem;
}

.btn-mode-toggle {
    font-size: 0.85rem;
    padding: 2px 8px;
    border: 1px solid #64ffda;
    color: #64ffda;
    background: transparent;
    border-radius: 4px;
    cursor: pointer;
}

.btn-mode-toggle:hover {
    background: #64ffda;
    color: #1a1a2e;
}

.btn-mode-toggle.active {
    background: #64ffda;
    color: #1a1a2e;
}