:root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --surface-muted: #f8fafc;
    --border: #d9e1ea;
    --text: #152033;
    --muted: #66758a;
    --primary: #1f6feb;
    --primary-strong: #174ea6;
    --green: #15803d;
    --green-bg: #e8f7ee;
    --amber: #a16207;
    --amber-bg: #fff7df;
    --danger: #b42318;
    --shadow: 0 12px 30px rgba(21, 32, 51, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: var(--text);
    background: var(--bg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    line-height: 1.5;
    letter-spacing: 0;
}

.auth-body {
    min-height: 100vh;
    background: var(--bg);
}

.auth-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-card {
    width: min(420px, 100%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 28px;
    display: grid;
    gap: 22px;
}

.login-brand .brand-title {
    color: var(--text);
}

.login-card h1 {
    margin: 0 0 8px;
    font-size: 24px;
}

.login-card p {
    margin: 0;
    color: var(--muted);
}

.login-form {
    display: grid;
    gap: 16px;
}

.login-form label {
    display: grid;
    gap: 8px;
    color: var(--muted);
}

.login-form input {
    min-height: 42px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0 12px;
    color: var(--text);
    background: var(--surface);
}

.alert {
    border-radius: 8px;
    border: 1px solid var(--border);
    padding: 12px 14px;
}

.alert.warn {
    color: var(--amber);
    background: var(--amber-bg);
    border-color: #f5d576;
}

.alert.ok {
    color: var(--green);
    background: var(--green-bg);
    border-color: #9ad8ad;
}

.alert.danger {
    color: var(--danger);
    background: #fff1f0;
    border-color: #f4b4ae;
}

button,
input {
    font: inherit;
}

.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 248px minmax(0, 1fr);
}

.sidebar {
    background: #111827;
    color: #e5e7eb;
    padding: 20px 16px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    background: #2563eb;
    color: #ffffff;
    font-weight: 700;
}

.brand-title {
    font-weight: 700;
}

.brand-subtitle,
.sidebar-footer span,
.sidebar-footer strong {
    color: #9ca3af;
    font-size: 12px;
}

.nav-list {
    display: grid;
    gap: 6px;
}

.nav-item {
    width: 100%;
    min-height: 40px;
    border: 0;
    border-radius: 8px;
    padding: 0 12px;
    color: #cbd5e1;
    background: transparent;
    text-align: left;
    cursor: pointer;
}

.nav-item:hover,
.nav-item.active {
    color: #ffffff;
    background: #1f2937;
}

.sidebar-footer {
    margin-top: auto;
    display: grid;
    gap: 4px;
}

.main {
    min-width: 0;
    padding: 24px;
    display: grid;
    gap: 20px;
}

.topbar {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.topbar h1,
.panel h2,
.chat-header h2 {
    margin: 0;
    font-size: 20px;
    line-height: 1.25;
}

.topbar p,
.chat-header span,
.metric-card span,
.metric-card em,
.panel-header span,
.conversation-item span,
.task-board em {
    margin: 0;
    color: var(--muted);
}

.topbar-actions,
.filter-row,
.composer,
.review-item div,
.inline-form {
    display: flex;
    gap: 10px;
    align-items: center;
}

.primary-button,
.ghost-button,
.filter-row button,
.composer button {
    min-height: 36px;
    border-radius: 8px;
    border: 1px solid transparent;
    padding: 0 14px;
    cursor: pointer;
    white-space: nowrap;
}

.primary-button {
    color: #ffffff;
    background: var(--primary);
}

.primary-button:hover {
    background: var(--primary-strong);
}

.ghost-button,
.filter-row button {
    color: var(--text);
    background: var(--surface);
    border-color: var(--border);
}

.view-panel {
    display: none;
}

.view-panel.active {
    display: grid;
    gap: 20px;
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.metric-card,
.panel,
.conversation-list,
.chat-panel,
.insight-panel .panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.metric-card {
    min-height: 116px;
    padding: 18px;
    display: grid;
    gap: 6px;
}

.metric-card strong {
    font-size: 30px;
    line-height: 1.1;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: minmax(360px, 0.9fr) minmax(520px, 1.1fr);
    gap: 20px;
}

.ops-panel {
    box-shadow: none;
}

.ops-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.ops-grid article {
    min-height: 92px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    background: var(--surface-muted);
    display: grid;
    gap: 4px;
}

.ops-grid span,
.ops-grid em {
    color: var(--muted);
}

.ops-grid strong {
    font-size: 24px;
}

.panel {
    padding: 18px;
}

.panel.compact {
    box-shadow: none;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.funnel {
    display: grid;
    gap: 10px;
}

.funnel div {
    min-height: 44px;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: 0 12px;
    border-radius: 8px;
    background: linear-gradient(90deg, #dbeafe var(--value), var(--surface-muted) 0);
    border: 1px solid #dbeafe;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

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

.data-table th {
    color: var(--muted);
    font-weight: 600;
    background: var(--surface-muted);
}

.status {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    border-radius: 999px;
    padding: 0 10px;
    font-size: 12px;
    font-weight: 600;
}

.status.ok {
    color: var(--green);
    background: var(--green-bg);
}

.status.warn {
    color: var(--amber);
    background: var(--amber-bg);
}

.status.muted {
    color: var(--muted);
    background: #eef2f7;
}

.workspace {
    min-height: 660px;
    display: grid;
    grid-template-columns: 280px minmax(360px, 1fr) 336px;
    gap: 16px;
}

.conversation-list,
.chat-panel,
.insight-panel {
    min-height: 0;
}

.conversation-list {
    padding: 14px;
    display: grid;
    align-content: start;
    gap: 12px;
}

.filter-row input,
.composer input {
    min-width: 0;
    width: 100%;
    min-height: 36px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0 12px;
    color: var(--text);
    background: var(--surface);
}

.conversation-item {
    min-height: 72px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    display: grid;
    gap: 4px;
    cursor: pointer;
}

.conversation-item.active {
    border-color: var(--primary);
    background: #eff6ff;
}

.chat-panel {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
}

.chat-header {
    min-height: 72px;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.chat-stream {
    padding: 18px;
    display: grid;
    align-content: start;
    gap: 14px;
    background: #eef2f6;
    overflow: auto;
}

.message {
    max-width: 72%;
    display: grid;
    gap: 6px;
}

.message span {
    color: var(--muted);
    font-size: 12px;
}

.message span em {
    display: inline-flex;
    align-items: center;
    min-height: 20px;
    margin-left: 6px;
    padding: 0 7px;
    border-radius: 999px;
    color: var(--danger);
    background: #fff1f0;
    border: 1px solid #f4b4ae;
    font-style: normal;
}

.message p {
    margin: 0;
    padding: 12px 14px;
    border-radius: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
}

.message.assistant {
    justify-self: end;
}

.message.assistant p {
    color: #073b22;
    background: #d9f99d;
    border-color: #bef264;
}

.message.staff {
    justify-self: end;
}

.message.staff p {
    color: #073b22;
    background: #d9f99d;
    border-color: #bef264;
}

.message.welcome p {
    color: #334155;
    background: #f8fafc;
    border-style: dashed;
}

.message.not-delivered p {
    opacity: 0.72;
    border-color: #f4b4ae;
}

.composer {
    padding: 14px;
    border-top: 1px solid var(--border);
}

.insight-panel {
    display: grid;
    align-content: start;
    gap: 14px;
}

.facts {
    margin: 0;
    display: grid;
    grid-template-columns: 88px 1fr;
    gap: 10px 12px;
}

.facts dt {
    color: var(--muted);
}

.facts dd {
    margin: 0;
}

.check-list {
    margin: 0;
    padding-left: 18px;
    color: var(--text);
}

.reply-draft-text {
    margin: 0;
    padding: 12px;
    border-radius: 8px;
    background: var(--surface-muted);
    border: 1px solid var(--border);
}

.muted-line {
    display: block;
    color: var(--muted);
}

.flag-line {
    display: block;
    padding: 8px 10px;
    border-radius: 8px;
    color: var(--amber);
    background: var(--amber-bg);
    border: 1px solid #f5d576;
}

.task-board {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.task-board article {
    min-height: 112px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    background: var(--surface-muted);
    display: grid;
    gap: 6px;
}

.task-board strong {
    font-size: 28px;
}

.review-list {
    display: grid;
    gap: 12px;
}

.review-item {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    display: grid;
    gap: 10px;
    background: var(--surface-muted);
}

.review-title-row,
.review-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.review-actions {
    justify-content: flex-start;
}

.review-item p {
    margin: 0;
    color: var(--muted);
}

.review-item small {
    color: var(--muted);
}

.settings-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: 18px;
    align-items: start;
}

.settings-form,
.settings-note {
    display: grid;
    gap: 14px;
}

.settings-note {
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface-muted);
}

.settings-note p {
    margin: 0;
    color: var(--muted);
}

.field,
.check-field {
    display: grid;
    gap: 8px;
    color: var(--muted);
}

.field input {
    width: 100%;
    min-height: 38px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0 12px;
    color: var(--text);
    background: var(--surface);
}

.field-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.check-field {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
}

@media (max-width: 1180px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .nav-list {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .workspace,
    .dashboard-grid,
    .metric-grid,
    .ops-grid,
    .settings-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .main {
        padding: 16px;
    }

    .topbar,
    .chat-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .nav-list,
    .task-board,
    .field-row {
        grid-template-columns: 1fr;
    }

    .message {
        max-width: 92%;
    }
}