:root {
  color-scheme: light;
  --bg: #f4efe6;
  --bg-strong: #e9ddcb;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-strong: #fffaf3;
  --ink: #1c2430;
  --muted: #6b7280;
  --accent: #b85a18;
  --accent-strong: #8f3f09;
  --positive: #257a4a;
  --danger: #a33b20;
  --line: rgba(28, 36, 48, 0.1);
  --line-strong: rgba(28, 36, 48, 0.2);
  --shadow: 0 18px 36px rgba(55, 39, 15, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(184, 90, 24, 0.16), transparent 24%),
    radial-gradient(circle at bottom right, rgba(143, 63, 9, 0.09), transparent 24%),
    linear-gradient(180deg, #faf5ee 0%, var(--bg) 100%);
}

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

button {
  cursor: pointer;
}

.admin-shell {
  width: min(1440px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 40px;
}

.admin-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.55fr);
  gap: 16px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.admin-hero h1 {
  margin: 0 0 10px;
  font-size: clamp(30px, 4.2vw, 46px);
  line-height: 1.06;
}

.summary {
  margin: 0;
  max-width: 760px;
  line-height: 1.75;
  color: var(--muted);
}

.status-card,
.panel {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.status-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 22px;
}

.status-card span {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.status-card strong {
  font-size: 24px;
}

.status-card small {
  line-height: 1.6;
  color: var(--muted);
}

.session-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 6px;
}

.metric-card {
  padding: 12px 12px 10px;
  border-radius: 16px;
  background: rgba(28, 36, 48, 0.05);
  border: 1px solid rgba(28, 36, 48, 0.08);
}

.metric-card span {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: 0.06em;
}

.metric-card strong {
  display: block;
  font-size: 15px;
  line-height: 1.35;
}

.admin-layout {
  display: grid;
  grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.sidebar-stack,
.content-stack {
  display: grid;
  gap: 16px;
}

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

.panel {
  padding: 20px 22px 22px;
}

.panel-primary {
  background:
    radial-gradient(circle at top right, rgba(184, 90, 24, 0.14), transparent 30%),
    var(--panel);
}

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

.panel-head h2 {
  margin: 0;
  font-size: 20px;
}

.panel-head span {
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(184, 90, 24, 0.1);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
}

.panel-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.panel-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.toolbar-search {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: min(100%, 360px);
}

.toolbar-search input {
  min-width: 0;
}

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

.form-grid-wide {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-grid label,
.field-span-full {
  display: grid;
  gap: 8px;
}

.field-span-full,
.action-row {
  grid-column: 1 / -1;
}

.form-grid span {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 11px 13px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--ink);
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease,
    transform 140ms ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(184, 90, 24, 0.52);
  box-shadow: 0 0 0 4px rgba(184, 90, 24, 0.12);
}

input[readonly] {
  background: rgba(244, 239, 230, 0.8);
  color: var(--muted);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.checkbox-field {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 10px 12px;
  border: 1px dashed var(--line);
  border-radius: 16px;
  background: rgba(255, 250, 243, 0.7);
}

.checkbox-field input {
  width: 18px;
  height: 18px;
  padding: 0;
  margin: 0;
}

.checkbox-field span {
  font-weight: 600;
}

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

button {
  border: 0;
  border-radius: 999px;
  padding: 11px 18px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 12px 24px rgba(143, 63, 9, 0.18);
  transition:
    transform 140ms ease,
    box-shadow 140ms ease,
    opacity 140ms ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(143, 63, 9, 0.22);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.button-secondary {
  background: rgba(28, 36, 48, 0.08);
  color: var(--ink);
  box-shadow: none;
}

.button-secondary:hover {
  box-shadow: none;
}

.studio-list,
.data-list,
.log-list {
  display: grid;
  gap: 12px;
}

.studio-card,
.data-card,
.log-card,
.empty-state {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel-strong);
}

.studio-card {
  padding: 15px 16px;
  text-align: left;
  color: inherit;
  box-shadow: none;
}

.studio-card.is-active {
  border-color: rgba(184, 90, 24, 0.45);
  background:
    radial-gradient(circle at top right, rgba(184, 90, 24, 0.16), transparent 46%),
    var(--panel-strong);
}

.studio-card h3,
.data-card h3,
.log-card h3 {
  margin: 0;
  font-size: 16px;
}

.data-card time,
.log-card time {
  display: inline-block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 9px;
  border-radius: 999px;
  background: rgba(28, 36, 48, 0.06);
  color: var(--muted);
  font-size: 12px;
}

.meta-chip strong {
  color: var(--ink);
}

.data-card,
.log-card,
.empty-state {
  padding: 14px 16px;
}

.data-card p,
.log-card p,
.empty-state p {
  margin: 8px 0 0;
  line-height: 1.65;
  color: var(--muted);
}

.flashbar {
  position: sticky;
  bottom: 16px;
  display: flex;
  justify-content: flex-end;
  margin-top: 16px;
  pointer-events: none;
}

.flashbar.is-hidden {
  display: none;
}

.flash-message {
  max-width: min(480px, 100%);
  padding: 13px 16px;
  border-radius: 18px;
  border: 1px solid transparent;
  background: rgba(28, 36, 48, 0.92);
  color: #fff;
  box-shadow: 0 14px 30px rgba(28, 36, 48, 0.22);
}

.flash-message.is-success {
  background: rgba(37, 122, 74, 0.94);
}

.flash-message.is-error {
  background: rgba(163, 59, 32, 0.94);
}

.flash-message.is-info {
  background: rgba(28, 36, 48, 0.92);
}

@media (max-width: 1180px) {
  .admin-layout,
  .dual-grid,
  .form-grid-wide {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  .admin-shell {
    width: min(100%, calc(100% - 24px));
    padding-top: 18px;
  }

  .admin-hero {
    grid-template-columns: 1fr;
  }

  .session-metrics {
    grid-template-columns: 1fr;
  }

  .panel-toolbar,
  .action-row,
  .toolbar-search {
    align-items: stretch;
    flex-direction: column;
  }

  button,
  .button-secondary {
    width: 100%;
  }
}