:root {
  color-scheme: light;
  --bg-main: radial-gradient(circle at top right, rgba(255, 154, 108, 0.18), transparent 26%),
    radial-gradient(circle at left top, rgba(23, 123, 128, 0.14), transparent 34%),
    linear-gradient(135deg, #f4efe5 0%, #e5eef0 46%, #d9e7e2 100%);
  --panel-bg: rgba(250, 247, 240, 0.82);
  --panel-border: rgba(17, 57, 66, 0.14);
  --panel-border-strong: rgba(17, 57, 66, 0.2);
  --text-main: #15333f;
  --text-soft: #5a707a;
  --text-mute: #7d9096;
  --accent: #0f7e87;
  --accent-strong: #0d5663;
  --shadow-md: 0 18px 48px rgba(14, 37, 46, 0.09);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --font-sans: "IBM Plex Sans", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
}

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

button {
  cursor: pointer;
}

code {
  padding: 0.12em 0.4em;
  border-radius: 999px;
  background: rgba(15, 126, 135, 0.1);
  color: var(--accent-strong);
}

.lab-shell {
  width: min(1600px, calc(100% - 24px));
  margin: 0 auto;
  padding: 14px 0 22px;
}

.lab-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 12px;
}

.eyebrow,
.panel-tag,
.summary-label,
.teaching-label,
.mini-label {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.title-group h1 {
  margin: 8px 0 8px;
  font-size: clamp(1.9rem, 3.8vw, 3.4rem);
  line-height: 1.02;
}

.title-copy {
  max-width: 760px;
  margin: 0;
  color: var(--text-soft);
  line-height: 1.65;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}

.phase-chip,
.ghost-button,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.phase-chip {
  background: linear-gradient(120deg, rgba(15, 126, 135, 0.14), rgba(255, 127, 80, 0.2));
  border-color: rgba(15, 126, 135, 0.18);
  color: var(--accent-strong);
}

.ghost-button,
.secondary-button {
  background: rgba(255, 255, 255, 0.62);
  border-color: var(--panel-border-strong);
  color: var(--text-main);
}

.primary-button {
  background: linear-gradient(120deg, #0f7e87, #ff7f50);
  color: #fff9f4;
  box-shadow: 0 14px 28px rgba(15, 126, 135, 0.26);
}

.ghost-button:hover,
.secondary-button:hover,
.primary-button:hover,
.ai-suggestions button:hover {
  transform: translateY(-1px);
}

.summary-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.summary-card,
.panel,
.teaching-dock {
  border: 1px solid var(--panel-border);
  background: var(--panel-bg);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
}

.summary-card {
  padding: 12px 14px;
  border-radius: var(--radius-md);
}

.summary-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1rem;
}

.panel {
  padding: 16px;
  border-radius: var(--radius-xl);
}

.panel-heading,
.stage-head,
.dock-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.panel-heading h2,
.stage-head h2,
.dock-head h3 {
  margin: 6px 0 0;
  font-size: 1.18rem;
}

.panel-meta {
  max-width: 320px;
  text-align: right;
  color: var(--text-mute);
  line-height: 1.55;
}

.stage-head {
  display: grid;
  gap: 8px;
}

.stage-head-copy {
  display: grid;
  gap: 6px;
}

.stage-event {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.6;
  max-width: 760px;
}

.controls-toggle-row {
  display: none;
}

.controls-toggle-button {
  min-height: 36px;
  padding: 0 14px;
}

.toolbar-form {
  display: grid;
  grid-template-columns: minmax(188px, 1.28fr) repeat(8, minmax(92px, 0.74fr)) repeat(2, auto) auto;
  gap: 8px;
  align-items: end;
  margin-bottom: 12px;
}

.toolbar-field {
  display: grid;
  gap: 6px;
  min-width: 0;
  position: relative;
}

.toolbar-field.toolbar-field-wide {
  min-width: 188px;
}

.toolbar-field span {
  color: var(--text-soft);
  font-size: 0.84rem;
}

.field-label {
  display: inline-flex;
  align-items: center;
  width: fit-content;
}

.toolbar-field input,
.toolbar-field select,
.chat-form textarea {
  width: 100%;
  min-height: 40px;
  padding: 8px 12px;
  border: 1px solid rgba(17, 57, 66, 0.14);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-main);
}

.toolbar-field input:focus,
.toolbar-field select:focus,
.chat-form textarea:focus {
  outline: none;
  border-color: rgba(15, 126, 135, 0.45);
  box-shadow: 0 0 0 4px rgba(15, 126, 135, 0.12);
}

.toolbar-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 12px;
  min-width: 106px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(17, 57, 66, 0.08);
  color: var(--text-soft);
  white-space: nowrap;
}

.toolbar-switch input {
  margin: 0;
}

.toolbar-actions {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(58px, auto);
  gap: 6px;
  justify-content: end;
  align-items: center;
  justify-self: end;
  padding: 4px;
  border-radius: 18px;
  border: 1px solid rgba(17, 57, 66, 0.08);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.36);
  width: fit-content;
  max-width: 100%;
}

.toolbar-actions .primary-button,
.toolbar-actions .secondary-button {
  min-height: 40px;
  min-width: 64px;
  padding: 0 14px;
  box-shadow: none;
  white-space: nowrap;
  font-size: 0.84rem;
}

.stage-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: 12px;
}

.stage-pane {
  display: grid;
  gap: 8px;
}

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

.pane-label {
  font-size: 0.95rem;
  font-weight: 700;
}

.pane-meta {
  color: var(--text-mute);
  font-size: 0.88rem;
}

.canvas-wrap {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(17, 57, 66, 0.08);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(231, 241, 237, 0.82));
}

.network-wrap,
.chart-wrap {
  height: clamp(240px, 34vh, 360px);
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.teaching-dock {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.85fr);
  gap: 12px;
  margin-top: 12px;
  padding: 14px;
  border-radius: 22px;
}

.teaching-dock-main,
.teaching-dock-side {
  display: grid;
  gap: 10px;
}

.teaching-body,
.status-copy {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.66;
}

.teaching-observation,
.dock-status,
.mini-card {
  border-radius: var(--radius-md);
  border: 1px solid rgba(17, 57, 66, 0.08);
  background: rgba(255, 255, 255, 0.72);
}

.teaching-observation,
.dock-status,
.mini-card {
  padding: 12px;
}

.teaching-dock-side {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.dock-status {
  grid-column: 1 / -1;
}

.mini-card strong {
  display: block;
  margin-top: 8px;
}

.ai-panel {
  margin-top: 12px;
}

.ai-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.ai-suggestions button {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(17, 57, 66, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text-main);
}

.chat-feed {
  display: grid;
  gap: 10px;
  min-height: 120px;
  max-height: 200px;
  padding: 4px 2px 10px;
  overflow: auto;
}

.chat-message {
  max-width: min(900px, 100%);
  padding: 12px 14px;
  border-radius: 18px;
  line-height: 1.66;
}

.chat-message.user {
  margin-left: auto;
  background: rgba(255, 127, 80, 0.14);
  border: 1px solid rgba(255, 127, 80, 0.2);
}

.chat-message.assistant {
  background: rgba(15, 126, 135, 0.1);
  border: 1px solid rgba(15, 126, 135, 0.16);
}

.chat-message strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.chat-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin-top: 4px;
}

.chat-form textarea {
  resize: vertical;
  min-height: 66px;
}

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

@media (max-width: 1380px) {
  .toolbar-form {
    grid-template-columns: repeat(5, minmax(118px, 1fr));
  }

  .toolbar-actions {
    grid-column: 1 / -1;
    justify-self: start;
  }
}

@media (max-width: 1180px) {
  .summary-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .stage-grid,
  .teaching-dock,
  .teaching-dock-side {
    grid-template-columns: 1fr;
  }

  .network-wrap,
  .chart-wrap {
    height: clamp(220px, 30vh, 320px);
  }
}

@media (max-width: 860px) {
  .lab-shell {
    width: min(100%, calc(100% - 16px));
    padding: 8px 0 14px;
  }

  .lab-header {
    gap: 10px;
    margin-bottom: 8px;
  }

  .lab-header,
  .panel-heading,
  .stage-head,
  .dock-head,
  .chat-form {
    display: grid;
    grid-template-columns: 1fr;
  }

  .summary-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    margin-bottom: 8px;
  }

  .summary-card {
    padding: 8px 10px;
  }

  .summary-card strong {
    margin-top: 4px;
    font-size: 0.9rem;
  }

  .panel {
    padding: 10px;
  }

  .eyebrow {
    font-size: 0.66rem;
    letter-spacing: 0.12em;
  }

  .title-group h1 {
    margin: 4px 0 4px;
    font-size: clamp(1.55rem, 7.1vw, 2.2rem);
    line-height: 0.96;
  }

  .title-copy {
    max-width: 100%;
    font-size: 0.84rem;
    line-height: 1.42;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .header-actions {
    margin-top: 0;
    gap: 8px;
  }

  .header-actions .ghost-button,
  .header-actions .phase-chip {
    min-height: 34px;
    padding: 0 12px;
    font-size: 0.84rem;
  }

  .stage-panel {
    display: grid;
    gap: 8px;
  }

  .stage-head {
    order: 1;
    margin-bottom: 0;
  }

  .controls-toggle-row {
    display: none;
  }

  .stage-grid {
    order: 3;
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .network-wrap,
  .chart-wrap {
    height: clamp(180px, 24vh, 216px);
  }

  .toolbar-form {
    order: 2;
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    align-items: stretch;
    gap: 6px;
    margin-bottom: 0;
    padding-bottom: 2px;
    scrollbar-width: none;
  }

  .toolbar-form::-webkit-scrollbar {
    display: none;
  }

  .toolbar-field,
  .toolbar-switch,
  .toolbar-actions {
    flex: 0 0 auto;
  }

  .toolbar-field {
    width: 96px;
    gap: 3px;
  }

  .toolbar-field.toolbar-field-wide {
    width: 144px;
  }

  .toolbar-field span {
    font-size: 0.72rem;
  }

  .toolbar-field input,
  .toolbar-field select {
    min-height: 32px;
    padding: 5px 9px;
  }

  .toolbar-switch {
    min-height: 32px;
    padding: 0 8px;
    font-size: 0.78rem;
  }

  .toolbar-actions {
    display: flex;
    gap: 5px;
  }

  .toolbar-actions .primary-button,
  .toolbar-actions .secondary-button {
    min-height: 32px;
    padding: 0 10px;
    font-size: 0.86rem;
  }

  .teaching-dock {
    order: 4;
    margin-top: 6px;
    padding: 10px;
    gap: 8px;
    border-radius: 18px;
  }

  .teaching-dock-main,
  .teaching-dock-side {
    gap: 6px;
  }

  .teaching-dock-side {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .dock-head {
    margin-bottom: 6px;
  }

  .dock-head h3 {
    font-size: 1.02rem;
  }

  .teaching-body,
  .status-copy {
    font-size: 0.88rem;
    line-height: 1.48;
  }

  .teaching-observation,
  .dock-status,
  .mini-card {
    padding: 8px 10px;
  }

  .mini-card strong {
    margin-top: 5px;
    font-size: 0.92rem;
  }

  .teaching-label,
  .mini-label {
    font-size: 0.68rem;
    letter-spacing: 0.12em;
  }

  .ai-panel {
    margin-top: 8px;
  }
}