:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --soft: #eef2f6;
  --text: #151922;
  --muted: #68707d;
  --line: #dce2ea;
  --blue: #007aff;
  --green: #12b981;
  --danger: #c5221f;
  font-family: "Aptos", "Segoe UI", "Microsoft JhengHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--bg); }
h1, h2, p { margin: 0; }
button, input, textarea { font: inherit; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 34px 5vw;
  color: #f6fbff;
  background:
    radial-gradient(circle at 62% 20%, rgba(85, 225, 232, .28), transparent 32%),
    linear-gradient(120deg, #071522 0%, #12344a 55%, #075e68 100%);
  border-bottom: 1px solid #35b8c4;
  overflow: hidden;
}

.topbar h1 {
  margin-top: 8px;
  font-size: 42px;
  font-weight: 850;
  letter-spacing: .12em;
  text-shadow: 0 0 22px rgba(90, 220, 235, .46);
}

.eyebrow {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .18em;
  color: #38f1ff;
}

.telemetry {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  font-family: "Cascadia Mono", "Consolas", "Microsoft JhengHei", monospace;
  letter-spacing: .04em;
}

.status {
  padding: 10px 15px;
  border: 1px solid rgba(94, 234, 212, .75);
  border-radius: 22px;
  background: rgba(7, 21, 34, .72);
  color: #bffdf8;
  font-size: 15px;
  font-weight: 800;
  box-shadow: 0 0 18px rgba(56, 217, 230, .2);
}

.hardware {
  color: #8df2c0;
  font-size: 14px;
  font-weight: 700;
  text-align: right;
  white-space: nowrap;
}

.qnap-link {
  color: #aee9ff;
  text-decoration: none;
  border: 1px solid rgba(142, 217, 255, .55);
  border-radius: 16px;
  padding: 7px 12px;
  font-size: 13px;
}

.shell {
  display: grid;
  grid-template-columns: 310px 1fr;
  max-width: 1460px;
  margin: 0 auto;
  min-height: calc(100vh - 136px);
}

.sidebar {
  padding: 32px 24px;
  background: rgba(255, 255, 255, .78);
  border-right: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.section-title {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 13px;
}

.menu-gap { margin-top: 28px; }

.nav-item {
  width: 100%;
  display: block;
  margin-bottom: 8px;
  padding: 15px 16px;
  border: 1px solid transparent;
  border-radius: 15px;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.nav-item:hover,
.nav-item.active {
  border-color: #cfd7e3;
  background: #fff;
  box-shadow: 0 10px 24px rgba(19, 34, 56, .08);
}

.nav-item b,
.nav-item span {
  display: block;
}

.nav-item b {
  font-size: 16px;
}

.nav-item span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

.guardrail {
  margin-top: 30px;
  padding: 15px;
  border-left: 3px solid var(--blue);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
  background: #fff;
}

.workspace {
  display: flex;
  flex-direction: column;
  padding: 34px 5vw;
  background: #edf1f5;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.panel-head h2 {
  margin-top: 8px;
  font-size: 36px;
  font-weight: 850;
}

.ghost,
.action-row button,
.data-form button {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  padding: 10px 14px;
  cursor: pointer;
}

.view { display: none; }
.view.active { display: block; }

.hero-card,
.flow-card,
.info-card {
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, .86);
  box-shadow: 0 12px 28px rgba(19, 34, 56, .06);
}

.hero-card strong {
  display: block;
  font-size: 24px;
}

.hero-card span,
.info-card span,
.flow-card p {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.7;
}

.summary-grid,
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.summary-grid > div {
  padding: 17px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}

.summary-grid span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.summary-grid b {
  display: block;
  margin-top: 8px;
  color: var(--blue);
  font-size: 30px;
}

.info-card b {
  display: block;
  font-size: 18px;
}

.info-card p {
  margin: 10px 0 0;
  color: var(--text);
  line-height: 1.6;
}

.flow-card,
.action-row,
.data-form,
.table-wrap {
  margin-top: 16px;
}

.action-row {
  display: flex;
  gap: 10px;
}

.action-row button,
.data-form button {
  background: var(--blue);
  color: #fff;
  border: 0;
  font-weight: 800;
}

.action-row .secondary,
.data-form .secondary {
  background: #eef4ff;
  color: #006de0;
  border: 1px solid #b9d4ff;
}

.data-form {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.data-form input {
  min-width: 0;
  border: 1px solid #cfd7e3;
  border-radius: 10px;
  padding: 10px 12px;
  background: #fff;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  white-space: nowrap;
  font-size: 13px;
}

th, td {
  padding: 12px 14px;
  border-bottom: 1px solid #edf0f3;
  text-align: left;
}

th {
  background: #f8fafc;
  color: #4b5563;
}

.messages {
  flex: 1;
  min-height: 260px;
  margin-top: 24px;
  padding: 20px 0;
  overflow: auto;
}

.welcome,
.bubble {
  max-width: 860px;
  padding: 17px 20px;
  border-radius: 16px;
  line-height: 1.7;
}

.welcome {
  border: 1px dashed #c8cbd1;
  background: #fff;
  color: var(--muted);
}

.welcome strong { color: var(--text); }

.bubble {
  margin-bottom: 14px;
  white-space: pre-wrap;
}

.bubble.user {
  margin-left: auto;
  background: #dfeeff;
}

.bubble.assistant {
  border: 1px solid var(--line);
  background: #fff;
}

.composer {
  display: flex;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.composer textarea {
  flex: 1;
  resize: vertical;
  min-height: 78px;
  border: 1px solid #cfd7e3;
  border-radius: 14px;
  padding: 14px;
  background: #fff;
  color: var(--text);
}

.actions {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.actions button {
  border: 0;
  border-radius: 12px;
  background: var(--blue);
  color: #fff;
  padding: 13px 18px;
  font-weight: 850;
  cursor: pointer;
}

#collaborate {
  background: #ff9f43;
  color: #111827;
}

@media (max-width: 900px) {
  .topbar { display: block; }
  .telemetry { align-items: flex-start; margin-top: 18px; }
  .hardware { white-space: normal; text-align: left; }
  .shell { display: block; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--line); }
  .summary-grid, .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .data-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .composer { display: block; }
  .actions { margin-top: 10px; }
}