.main-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    background: var(--color-bg-light);
}

.topbar {
    height: var(--topbar-height);
    background: var(--color-bg-white);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: 0 var(--spacing-6);
    flex-shrink: 0;
}

.page-title {
    color: var(--color-text-primary);
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.page-subtitle {
    color: var(--color-text-muted);
    font-size: 13px;
}

.topbar-spacer {
    flex: 1;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px var(--spacing-3);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--color-error);
}

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

.status-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.status-text.connected {
    color: var(--color-success);
}

.new-chat-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-primary);
    color: var(--color-text-white);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    transition: background var(--transition-fast);
}

.new-chat-btn:hover {
    background: #5558e3;
}

.new-chat-btn svg {
    width: 16px;
    height: 16px;
}

.chat-area {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    padding: var(--spacing-6);
    padding-bottom: 0;
    overflow-y: auto;
}

.message {
    display: flex;
    gap: var(--spacing-3);
    max-width: 100%;
    flex-shrink: 0;
}

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: var(--avatar-size);
    height: var(--avatar-size);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.message-avatar.ai svg {
    width: 18px;
    height: 18px;
}

.message-avatar.user {
    background: var(--color-primary-lighter);
    color: var(--color-primary);
    font-size: var(--font-size-base);
    font-weight: 600;
}

.message-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
    max-width: 70%;
    min-width: 0;
}

.message.user .message-body {
    align-items: flex-end;
}

.message-bubble {
    padding: var(--spacing-3) var(--spacing-4);
    line-height: 1.6;
    word-break: break-word;
}

.message.assistant .message-bubble {
    background: var(--color-bg-white);
    color: var(--color-text-primary);
    border-radius: 0 var(--radius-xl) var(--radius-xl) var(--radius-xl);
}

.message.user .message-bubble {
    background: var(--color-primary);
    color: var(--color-text-white);
    border-radius: var(--radius-xl) 0 var(--radius-xl) var(--radius-xl);
}

.message-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-2);
}

.message-time,
.message-agent {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.plan-task-panel {
    position: fixed;
    z-index: 80;
    top: clamp(82px, 12vh, 120px);
    right: 24px;
    width: min(360px, calc(100vw - var(--sidebar-width) - 48px));
    max-height: calc(100vh - 144px);
    overflow-y: auto;
    border-radius: 18px;
    filter: drop-shadow(0 12px 30px rgba(26, 29, 46, .14));
    animation: plan-task-enter 220ms cubic-bezier(.2, 0, 0, 1) both;
}
@keyframes plan-task-enter {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}
.plan-task-card {
    width: 100%;
    padding: 18px;
    border: 1px solid rgba(229, 233, 244, .96);
    border-radius: 18px;
    background: rgba(255, 255, 255, .97);
    backdrop-filter: blur(16px);
}
.plan-task-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.plan-task-heading { min-width: 0; flex: 1; }
.plan-task-eyebrow { margin-bottom: 4px; color: var(--color-primary); font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.plan-task-header h3 { margin: 0; color: var(--color-text-primary); font-size: 15px; font-weight: 650; line-height: 1.45; }
.plan-task-overall-status { flex: 0 0 auto; padding: 5px 9px; border-radius: 999px; background: #f0f1ff; color: #5558c9; font-size: 11px; font-weight: 600; }
.plan-task-toggle { min-height: 36px; flex: 0 0 auto; padding: 0 10px; border: 1px solid #e4e6f2; border-radius: 10px; background: #fff; color: #5558c9; font: inherit; font-size: 12px; font-weight: 600; cursor: pointer; transition: background 150ms ease, border-color 150ms ease, transform 150ms ease; }
.plan-task-toggle:hover { border-color: #cfd0f5; background: #f7f7ff; }
.plan-task-toggle:active { transform: scale(.97); }
.plan-task-toggle:focus-visible { outline: 3px solid rgba(91, 94, 214, .28); outline-offset: 2px; }
.plan-task-progress-meta { display: flex; justify-content: space-between; margin: 16px 0 7px; color: var(--color-text-muted); font-size: 12px; }
.plan-task-progress { height: 5px; overflow: hidden; border-radius: 999px; background: #eceef6; }
.plan-task-progress span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #7377f2, #9b8cf7); transition: width 240ms cubic-bezier(.2, 0, 0, 1); }
.plan-task-list { display: grid; gap: 7px; margin: 15px 0 0; padding: 0; list-style: none; }
.plan-task-row { display: flex; align-items: flex-start; gap: 9px; padding: 9px 10px; border: 1px solid transparent; border-radius: 11px; background: #f7f8fc; transition: background 150ms ease, border-color 150ms ease; }
.plan-task-row.is-current { border-color: #dcdcff; background: #f5f4ff; }
.plan-task-index { display: grid; width: 21px; height: 21px; flex: 0 0 21px; place-items: center; border-radius: 50%; background: #e9eaf2; color: #6b6e85; font-size: 11px; font-weight: 700; }
.plan-task-row.completed .plan-task-index { background: #e3f5eb; color: #248653; }
.plan-task-row.running .plan-task-index { background: #e9e9ff; color: #5b5ed6; }
.plan-task-copy { min-width: 0; flex: 1; }
.plan-task-request { color: #30334a; font-size: 13px; line-height: 1.45; overflow-wrap: anywhere; }
.plan-task-summary { margin-top: 3px; color: var(--color-text-muted); font-size: 11px; line-height: 1.4; }
.plan-task-route { flex: 0 0 auto; padding: 3px 6px; border-radius: 6px; background: #eff1f7; color: #70748a; font-size: 10px; }
.plan-task-status { flex: 0 0 auto; padding-top: 2px; color: var(--color-text-muted); font-size: 11px; }
.plan-task-row.running .plan-task-status { color: #585bd1; font-weight: 600; }
.plan-task-row.failed .plan-task-status { color: #c77916; }
.plan-task-hint { margin-top: 12px; color: #9295a8; font-size: 11px; line-height: 1.45; }
.plan-task-panel.is-collapsed { width: min(320px, calc(100vw - var(--sidebar-width) - 48px)); }
.plan-task-panel.is-collapsed .plan-task-list,
.plan-task-panel.is-collapsed .plan-task-hint { display: none; }
.plan-task-panel.is-collapsed .plan-task-header h3 { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@media (max-width: 760px) {
    .plan-task-panel { top: 70px; right: 8px; width: min(340px, calc(100vw - 16px)); max-height: min(46vh, 390px); }
    .plan-task-panel.is-collapsed { width: min(320px, calc(100vw - 16px)); }
    .plan-task-card { padding: 14px; }
    .plan-task-status { font-size: 10px; }
    .plan-task-toggle { min-height: 44px; }
}

.message-agent {
    padding: 0 var(--spacing-1);
    border-radius: var(--radius-sm);
    background: var(--color-primary-lighter);
    color: var(--color-primary);
    overflow-wrap: anywhere;
    min-width: 0;
    max-width: 100%;
}

.typing-indicator {
    display: flex;
    gap: var(--spacing-3);
    align-items: center;
}

.typing-bubble {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-bg-white);
    border-radius: 0 var(--radius-xl) var(--radius-xl) var(--radius-xl);
}

.typing-dot {
    width: 7px;
    height: 7px;
    border-radius: var(--radius-full);
    animation: typing 1s infinite;
}

.typing-dot:nth-child(1) {
    background: var(--color-primary);
}

.typing-dot:nth-child(2) {
    background: var(--color-primary-light);
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    background: var(--color-primary-lighter);
    animation-delay: 0.4s;
}

.typing-text {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-left: var(--spacing-2);
}

@keyframes typing {
    0%, 100% { opacity: 0.4; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(-3px); }
}

.input-bar {
    background: var(--color-bg-white);
    padding: var(--spacing-4) var(--spacing-6);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.input-divider {
    height: 1px;
    background: var(--color-border-light);
    margin-bottom: var(--spacing-3);
}

.input-row {
    display: flex;
    gap: var(--spacing-3);
    align-items: flex-end;
}

.input-wrap {
    flex: 1;
    min-width: 0;
    height: var(--input-height);
    background: var(--color-bg-light);
    border-radius: 22px;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: 0 var(--spacing-4);
}

.input-wrap svg {
    width: 18px;
    height: 18px;
    color: var(--color-text-muted);
    flex-shrink: 0;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.input-wrap svg:hover {
    color: var(--color-primary);
}

.input-field {
    flex: 1;
    min-width: 0;
    height: 100%;
    background: transparent;
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
}

.send-btn {
    width: var(--input-height);
    height: var(--input-height);
    background: var(--color-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-white);
    transition: background var(--transition-fast);
    flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
    background: #5558e3;
}

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

.send-btn.interrupt {
    background: var(--color-error);
}

.send-btn.interrupt:hover {
    background: #ff6666;
}

.input-hint {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding-top: var(--spacing-2);
}

.hint-text {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

.hint-spacer {
    flex: 1;
}

.agent-route-select {
    max-width: 230px;
    padding: 4px 8px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg-white);
    color: var(--color-text-primary);
    font-size: var(--font-size-xs);
}

.model-label {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

/* 固定字号配合换行，窄屏仍可完整显示状态、发送按钮与业务卡片。 */
@media (max-width: 760px) {
    .topbar { height: auto; min-height: 60px; padding: 10px 12px 10px 60px; gap: 8px; flex-wrap: wrap; }
    .topbar .page-subtitle, .topbar-spacer { display: none; }
    .topbar .page-title, .status-badge, .new-chat-btn { flex-shrink: 0; white-space: nowrap; }
    .topbar .page-title { font-size: 18px; }
    .topbar .status-badge { padding: 4px; }
    .chat-area { padding: 12px; }
    .message { gap: 8px; }
    .message-body { max-width: calc(100% - 44px); }
    .message.tool .message-body { max-width: calc(100% - 44px) !important; }
    .message.tool .message-bubble { max-width: 100%; }
    .input-bar { padding: 10px 12px; }
    .input-hint { flex-wrap: wrap; gap: 4px 12px; }
    .input-hint .hint-spacer { display: none; }
    .input-hint .model-label { margin-left: auto; }
}

/* 工具消息样式 */
.message.tool .message-bubble {
    background: rgba(255, 165, 0, 0.1);
    border: 1px solid rgba(255, 165, 0, 0.3);
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: 13px;
    max-width: 90%;
}

.message.subagent-registration {
    flex-shrink: 0;
    justify-content: center;
}

.subagent-registration-bubble {
    width: min(680px, 90%);
    padding: 14px 16px;
    border: 1px solid rgba(99, 102, 241, 0.22);
    border-radius: var(--radius-md, 8px);
    background: var(--color-bg-white);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.subagent-registration-header,
.subagent-registration-name {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.subagent-registration-header strong,
.subagent-registration-name {
    color: var(--color-text-primary);
    font-size: 13px;
    font-weight: 600;
}

.subagent-registration-status {
    flex-shrink: 0;
    font-size: 11px;
}

.subagent-registration-status.pending { color: var(--color-text-muted); }
.subagent-registration-status.success { color: var(--color-success); }
.subagent-registration-status.error { color: var(--color-error); }

.subagent-registration-agent {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--color-border, #e5e7eb);
}

.subagent-registration-field {
    display: grid;
    grid-template-columns: 105px minmax(0, 1fr);
    gap: 10px;
    margin-top: 6px;
    font-size: 12px;
    line-height: 1.5;
}

.subagent-registration-field > span:first-child {
    color: var(--color-text-muted);
}

.subagent-registration-field > span:last-child {
    color: var(--color-text-primary);
    overflow-wrap: anywhere;
}

.subagent-registration-note {
    margin-top: 10px;
    color: var(--color-text-muted);
    font-size: 11px;
}

.tool-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-2);
    padding-bottom: var(--spacing-2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.tool-badge {
    padding: 2px var(--spacing-2);
    border-radius: 4px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.tool-badge.use {
    background: rgba(99, 102, 241, 0.3);
    color: var(--color-primary);
}

.tool-badge.result {
    background: rgba(34, 197, 94, 0.3);
    color: var(--color-success);
}

.tool-name {
    color: var(--color-text-primary);
    font-weight: 500;
}

.tool-process-name {
    margin-left: auto;
    color: var(--color-text-muted);
    font-family: var(--font-family, sans-serif);
    font-size: 11px;
    white-space: nowrap;
}

.tool-body {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
    padding: var(--spacing-2);
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 200px;
    overflow-y: auto;
}

.tool-body.collapsed {
    max-height: 60px;
    overflow: hidden;
    position: relative;
}

.tool-body.collapsed::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 30px;
    background: linear-gradient(transparent, rgba(255, 255, 255, 0.8));
}

.tool-toggle {
    margin-top: var(--spacing-2);
    padding: var(--spacing-1) var(--spacing-2);
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

.tool-toggle:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--color-text-primary);
}