:root {
  color-scheme: light;
  --bg: #f4f6f3;
  --panel: #ffffff;
  --ink: #19211f;
  --muted: #65706b;
  --line: #d9ded8;
  --accent: #0d7568;
  --accent-dark: #095b51;
  --warning: #c76d2c;
  --shadow: 0 18px 40px rgba(29, 42, 39, 0.12);
  --radius: 8px;
  --page-gap: clamp(8px, 1vw, 14px);
  --page-pad: clamp(8px, 1vw, 14px);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background:
    linear-gradient(135deg, rgba(13, 117, 104, 0.08), transparent 38%),
    var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", Arial, sans-serif;
  overflow: hidden;
}

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

button {
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(300px, 21vw, 370px);
  gap: var(--page-gap);
  height: 100dvh;
  max-height: 100dvh;
  min-height: 0;
  padding: var(--page-pad);
  overflow: hidden;
}

.app-shell.setup-collapsed {
  grid-template-columns: minmax(0, 1fr);
}

.workspace,
.control-panel {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(217, 222, 216, 0.9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.workspace {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.topbar,
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: clamp(8px, 1vw, 14px);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent-dark);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(1.75rem, 3.2vw, 2.75rem);
  line-height: 1;
}

h2 {
  font-size: clamp(1.05rem, 1.4vw, 1.3rem);
}

.toolbar,
.signal-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.icon-button,
.primary-button,
.secondary-button,
.axis-zoom-button {
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  transition: background 140ms ease, transform 140ms ease, border-color 140ms ease;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  font-size: 1.3rem;
}

.icon-button:hover,
.primary-button:hover,
.secondary-button:hover,
.axis-zoom-button:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.primary-button {
  min-height: 36px;
  padding: 0 12px;
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 700;
  white-space: nowrap;
}

.primary-button:hover {
  background: var(--accent-dark);
}

.secondary-button {
  min-height: 36px;
  padding: 0 12px;
  color: var(--accent-dark);
  font-weight: 750;
  white-space: nowrap;
}

.axis-zoom-button {
  min-width: 40px;
  height: 30px;
  padding: 0 6px;
  color: var(--accent-dark);
  font-size: 0.84rem;
  font-weight: 800;
}

.axis-zoom-grid {
  display: grid;
  grid-template-columns: repeat(2, 40px);
  gap: 6px;
}

.graph-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  min-height: 0;
  padding: clamp(8px, 1vw, 12px);
  flex: 1;
  overflow: hidden;
}

.graph-stage {
  position: relative;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, rgba(13, 117, 104, 0.04), rgba(199, 109, 44, 0.04)),
    #fbfcfa;
  overflow: hidden;
}

#graphCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.graph-tooltip {
  position: absolute;
  z-index: 3;
  min-width: 180px;
  max-width: 280px;
  padding: 8px 10px;
  border: 1px solid rgba(25, 33, 31, 0.18);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 22px rgba(29, 42, 39, 0.16);
  color: var(--ink);
  font-size: 0.82rem;
  line-height: 1.4;
  pointer-events: none;
  white-space: pre-line;
}

.graph-toast {
  position: absolute;
  left: 50%;
  top: 16px;
  z-index: 4;
  max-width: min(360px, calc(100% - 32px));
  padding: 10px 14px;
  border: 1px solid rgba(199, 109, 44, 0.45);
  border-radius: 7px;
  background: #fff3df;
  box-shadow: 0 14px 28px rgba(105, 62, 25, 0.24);
  color: #6b350d;
  font-weight: 800;
  line-height: 1.3;
  text-align: center;
  transform: translateX(-50%);
  pointer-events: none;
}

.graph-toast.is-visible {
  animation: toast-pop 180ms ease-out;
}

.graph-toast[hidden] {
  display: none;
}

@keyframes toast-pop {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-8px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0) scale(1);
  }
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(25, 33, 31, 0.48);
}

.modal-backdrop[hidden] {
  display: none;
}

.advanced-card {
  width: min(920px, calc(100vw - 40px));
  max-height: calc(100dvh - 40px);
  overflow: auto;
  border: 1px solid rgba(217, 222, 216, 0.95);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: 0 24px 60px rgba(25, 33, 31, 0.28);
}

.advanced-header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.advanced-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 16px;
}

.format-group {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcfa;
}

.format-group h3 {
  margin: 0;
  color: var(--ink);
  font-size: 0.96rem;
  letter-spacing: 0;
}

.advanced-signals-group {
  grid-column: 1 / -1;
}

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

.advanced-signal-card {
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.advanced-signal-card-title {
  color: var(--ink);
  font-weight: 800;
}

.advanced-signal-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.advanced-signal-card .signal-controls {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.control-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.control-panel {
  padding-bottom: 12px;
  overflow: auto;
  min-height: 0;
  max-height: calc(100dvh - (var(--page-pad) * 2));
}

.app-shell.setup-collapsed .control-panel {
  display: none;
}

.unit-grid,
.signal-list,
.note-field,
.panel-actions {
  margin-inline: 14px;
}

.panel-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding-top: 12px;
}

.unit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding-top: 12px;
}

.field {
  display: grid;
  gap: 5px;
}

.field span,
.switch-row span {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 650;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  padding: 7px 10px;
}

.field textarea {
  resize: vertical;
  line-height: 1.4;
}

.field.compact input {
  min-height: 34px;
}

.color-field input {
  width: 100%;
  height: 34px;
  min-height: 34px;
  padding: 2px;
}

.full-button {
  width: 100%;
  justify-content: center;
}

.panel-actions .full-button {
  min-height: 42px;
  padding: 6px 8px;
  font-size: clamp(0.78rem, 0.9vw, 0.92rem);
  line-height: 1.15;
  text-align: center;
  white-space: normal;
  overflow-wrap: anywhere;
}

.switch-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.switch-row input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.signal-list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.signal-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcfa;
  padding: 10px;
}

.signal-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.include-resultant-row {
  margin-top: 10px;
}

.signal-visible {
  min-width: 0;
}

.signal-name {
  color: var(--ink);
  overflow-wrap: anywhere;
}

.signal-color {
  width: 38px;
  height: 38px;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
}

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  margin: 10px 0;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #eef2ef;
}

.segmented label {
  position: relative;
}

.segmented input {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.segmented span {
  display: grid;
  place-items: center;
  min-height: 32px;
  border-radius: 5px;
  color: var(--muted);
  font-weight: 750;
}

.segmented input:checked + span {
  background: #fff;
  color: var(--accent-dark);
  box-shadow: 0 1px 4px rgba(29, 42, 39, 0.12);
}

.signal-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.note-field {
  margin-top: 14px;
}

.sr-only {
  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: 980px) {
  body {
    overflow: auto;
  }

  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(420px, 56dvh) minmax(0, 1fr);
    min-height: 100dvh;
    height: auto;
    overflow: auto;
  }

  .app-shell.setup-collapsed {
    grid-template-rows: minmax(420px, calc(100dvh - (var(--page-pad) * 2)));
  }

  .control-panel {
    max-height: none;
  }
}

@media (max-width: 700px) {
  .app-shell {
    padding: 10px;
  }

  .topbar,
  .panel-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .graph-panel {
    grid-template-columns: 1fr;
  }

  .graph-stage {
    min-height: 360px;
  }

  .signal-controls {
    grid-template-columns: 1fr;
  }

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

  .advanced-signal-controls {
    grid-template-columns: 1fr;
  }
}

@media (max-height: 760px) and (min-width: 981px) {
  .eyebrow {
    font-size: 0.66rem;
    margin-bottom: 2px;
  }

  h1 {
    font-size: clamp(1.5rem, 2.5vw, 2.15rem);
  }

  .icon-button {
    width: 34px;
    height: 34px;
  }

  .primary-button,
  .secondary-button,
  .axis-zoom-button {
    min-height: 34px;
  }

  .field span,
  .switch-row span {
    font-size: 0.78rem;
  }

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