*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-muted: #f2f4f9;
  --border: #e4e7ef;
  --border-strong: #d3d8e3;
  --text: #1b2230;
  --text-muted: #5b6473;
  --text-soft: #7a8395;
  --primary: #2a6df4;
  --primary-strong: #1e57cf;
  --primary-soft: #e8f0ff;
  --success: #1f9d62;
  --warning: #c98a16;
  --danger: #c0392b;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  --shadow-sm: 0 1px 2px rgba(20, 30, 60, 0.04);
  --shadow-md: 0 4px 18px rgba(20, 30, 60, 0.06);
  --radius: 12px;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.page-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 8px;
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

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

.brand-name {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-s {
  display: inline-block;
  margin-left: 2px;
  padding: 0 6px;
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
}

.brand-tag {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.brand-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.nav-pill {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px;
}

.lede {
  margin: 14px 0 0;
  color: var(--text-muted);
  font-size: 15px;
  max-width: 720px;
}

.layout {
  max-width: 1200px;
  margin: 16px auto 0;
  padding: 0 24px 32px;
  display: grid;
  grid-template-columns: 1.05fr 1fr 1.15fr;
  gap: 18px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.panel-head h2 {
  margin: 0;
  font-size: 16px;
  letter-spacing: 0.01em;
}

.panel-sub {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--text-muted);
}

.status-badge {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--surface-muted);
  color: var(--text-muted);
  white-space: nowrap;
}

.status-badge.online {
  color: #ffffff;
  background: var(--success);
  border-color: var(--success);
}

.status-badge.recovering {
  color: #5a3e02;
  background: #fff2cc;
  border-color: #f0d177;
}

.status-badge.offline {
  color: #fff;
  background: var(--danger);
  border-color: var(--danger);
}

.info-row {
  margin-top: 4px;
}

.hint {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

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

.btn {
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 14px;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover:enabled {
  background: var(--surface-muted);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

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

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text-muted);
}

.btn-ghost:hover:enabled {
  background: var(--surface-muted);
  color: var(--text);
}

.btn-small {
  padding: 6px 10px;
  font-size: 12px;
}

.status-line {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
}

.meta-grid {
  margin: 4px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 16px;
}

.meta-grid > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.meta-grid dt {
  margin: 0;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.meta-grid dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text);
}

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

.quick-start h3 {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.quick-start ol {
  margin: 0;
  padding-left: 18px;
  color: var(--text);
  font-size: 14px;
}

.quick-start li {
  margin-bottom: 4px;
}

.footnote {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--text-soft);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.metric {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
}

.metric-label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.metric-value {
  display: block;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.dtc-block h3 {
  margin: 4px 0 8px;
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.dtc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.dtc-list li {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  color: var(--text);
}

.policy-note {
  margin: 0;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--primary-soft);
  border: 1px solid #d6e3ff;
  border-radius: 8px;
  padding: 8px 10px;
  line-height: 1.45;
}

.quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.quick-actions .btn {
  padding: 6px 10px;
  font-size: 12px;
  border-radius: 999px;
  background: var(--surface-muted);
  border-color: var(--border);
  color: var(--text-muted);
}

.quick-actions .btn:hover:enabled {
  background: var(--primary-soft);
  border-color: #d6e3ff;
  color: var(--primary-strong);
}

.chat-log {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 10px;
  min-height: 320px;
  max-height: 460px;
  overflow: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chat-message {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--surface);
  margin: 0;
}

.chat-message.user {
  background: #eef3ff;
  border-color: #d8e3fc;
}

.chat-message.assistant {
  background: var(--surface);
}

.chat-role {
  margin: 0 0 4px;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.chat-content {
  margin: 0;
  white-space: pre-wrap;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
}

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

.chat-form input {
  flex: 1;
  font-family: inherit;
  font-size: 14px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 9px 12px;
}

.chat-form input:focus {
  outline: 2px solid var(--primary-soft);
  border-color: var(--primary);
}

.chat-form input::placeholder {
  color: var(--text-soft);
}

.page-footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 32px;
  font-size: 12px;
  color: var(--text-soft);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.page-footer .dot {
  opacity: 0.6;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr 1fr;
  }

  .chat-card {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .meta-grid {
    grid-template-columns: 1fr;
  }
}