:root {
  --ink: #07111f;
  --navy: #081425;
  --navy-2: #10243d;
  --text: #111827;
  --muted: #667085;
  --line: #dfe7f0;
  --soft: #f3f7fb;
  --blue: #0f67ff;
  --cyan: #24c3ff;
  --green: #10935d;
  --orange: #b96b14;
  --red: #b42318;
  --white: #ffffff;
  --shadow: 0 18px 54px rgba(8, 17, 31, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background: var(--soft);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 260px;
  padding: 26px;
  color: var(--white);
  background: linear-gradient(180deg, var(--navy), var(--navy-2));
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 21px;
}

.brand span {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  font-weight: 850;
}

.sidebar nav {
  display: grid;
  gap: 8px;
  margin-top: 42px;
}

.sidebar nav a {
  padding: 13px 14px;
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
  font-weight: 750;
}

.sidebar nav a.active,
.sidebar nav a:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.sidebar-note {
  position: absolute;
  right: 26px;
  bottom: 26px;
  left: 26px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.sidebar-note b,
.sidebar-note span {
  display: block;
}

.sidebar-note span {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
  line-height: 1.6;
}

main {
  margin-left: 260px;
  padding: 34px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}

.caption {
  margin: 0 0 8px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 850;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--ink);
  letter-spacing: 0;
}

h1 {
  font-size: 34px;
}

h2 {
  font-size: 22px;
}

.top-actions {
  display: grid;
  grid-template-columns: 190px 150px auto auto;
  align-items: center;
  gap: 10px;
}

.top-actions input,
.inline-form input,
.inline-form select,
.inline-form textarea,
.settings-form input {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  background: var(--white);
  padding: 0 12px;
  outline: none;
}

.inline-form textarea {
  min-height: 78px;
  padding: 10px 12px;
  resize: vertical;
}

.top-actions button,
.panel-button,
.inline-form button,
.settings-form button {
  min-height: 40px;
  border: 0;
  border-radius: 8px;
  color: var(--white);
  background: var(--ink);
  padding: 0 14px;
  font-weight: 850;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.kpi-card,
.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.kpi-card {
  padding: 18px;
}

.kpi-label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}

.kpi-value {
  margin-top: 12px;
  color: var(--ink);
  font-size: 31px;
  font-weight: 850;
}

.kpi-value small {
  color: var(--muted);
  font-size: 14px;
}

.layout-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.72fr);
  gap: 18px;
  margin-bottom: 18px;
}

.panel {
  margin-bottom: 18px;
  padding: 22px;
}

.panel-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.panel-tag,
.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 10px;
  border-radius: 999px;
  color: var(--blue);
  background: #edf4ff;
  font-size: 12px;
  font-weight: 850;
  white-space: nowrap;
}

.status-pill.ok {
  color: var(--green);
  background: #eaf8f1;
}

.status-pill.watch {
  color: var(--orange);
  background: #fff4e5;
}

.status-pill.danger {
  color: var(--red);
  background: #fff0ee;
}

.oss-box {
  display: grid;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.oss-box code {
  color: var(--ink);
  background: var(--soft);
  border-radius: 6px;
  padding: 3px 6px;
}

.compact-list {
  display: grid;
  gap: 10px;
}

.compact-item,
.course-card,
.product-card,
.queue-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
  padding: 14px;
}

.compact-item strong,
.course-card strong,
.product-card strong,
.queue-item strong {
  display: block;
  color: var(--ink);
}

.compact-item span,
.course-card span,
.product-card span,
.queue-item span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.table-wrap {
  overflow-x: auto;
}

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

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 13px 10px;
  text-align: left;
  font-size: 14px;
}

th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
}

.inline-form {
  display: grid;
  grid-template-columns: 1.2fr 0.7fr 150px 0.9fr;
  gap: 10px;
  margin-bottom: 18px;
}

.inline-form textarea {
  grid-column: 1 / span 3;
}

.hidden {
  display: none;
}

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

.course-card footer,
.product-card footer,
.queue-item footer {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 12px;
}

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

.settings-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.settings-form label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}

.settings-form button {
  align-self: end;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  max-width: 360px;
  padding: 13px 16px;
  border-radius: 8px;
  color: var(--white);
  background: var(--ink);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(12px);
  transition: 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1100px) {
  .sidebar {
    position: static;
    width: auto;
  }

  .sidebar-note {
    position: static;
    margin-top: 24px;
  }

  main {
    margin-left: 0;
    padding: 22px;
  }

  .topbar,
  .layout-grid {
    grid-template-columns: 1fr;
    display: grid;
  }

  .top-actions,
  .kpi-grid,
  .card-grid,
  .queue,
  .settings-form,
  .inline-form {
    grid-template-columns: 1fr;
  }

  .inline-form textarea {
    grid-column: auto;
  }
}