:root {
  color-scheme: light;
  --bg: #f6f7f4;
  --panel: #ffffff;
  --text: #202522;
  --muted: #637067;
  --line: #d9dfd8;
  --axial: #b84a4a;
  --tangential: #3f78a9;
  --oblique: #4f955f;
  --accent: #2d6458;
  --warn: #a55c18;
  --danger: #9d3434;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 28px;
  border-bottom: 1px solid var(--line);
  background: #eef2ed;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 1.55rem;
  line-height: 1.2;
}

h2 {
  font-size: 1rem;
  line-height: 1.3;
}

p {
  color: var(--muted);
  line-height: 1.45;
}

button {
  min-height: 38px;
  border: 1px solid #b9c4bb;
  border-radius: 6px;
  background: #ffffff;
  color: var(--text);
  font-weight: 650;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

#exportCsv {
  padding: 0 16px;
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.app-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: calc(100vh - 86px);
}

.control-panel {
  padding: 22px;
  border-right: 1px solid var(--line);
  background: #fbfcfa;
}

.control-panel h2 {
  margin-bottom: 14px;
}

form {
  display: grid;
  gap: 13px;
}

label {
  display: grid;
  gap: 6px;
  color: #334039;
  font-size: 0.9rem;
  font-weight: 650;
}

input {
  width: 100%;
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid #cbd5cf;
  border-radius: 6px;
  background: white;
  color: var(--text);
  font: inherit;
}

input:focus {
  outline: 2px solid rgba(45, 100, 88, 0.22);
  border-color: var(--accent);
}

.example-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 4px;
}

.formula-box {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.formula-box p + p {
  margin-top: 10px;
}

.content {
  min-width: 0;
  padding: 22px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(5, minmax(130px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.metrics div,
.warning-strip,
.plot-panel,
.recommendations,
.modes-table {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.metrics div {
  padding: 14px;
}

.metrics span {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

.metrics strong {
  font-size: 1.1rem;
}

.warning-strip {
  padding: 16px;
  margin-bottom: 16px;
}

.warning-strip h2 {
  margin-bottom: 10px;
}

.warning-list {
  display: grid;
  gap: 8px;
}

.warning-item {
  padding: 10px 12px;
  border-left: 4px solid var(--warn);
  background: #fff7ed;
  color: #4a3624;
  line-height: 1.35;
}

.warning-item.alto {
  border-left-color: var(--danger);
  background: #fff1f1;
}

.warning-item.ok {
  border-left-color: var(--accent);
  background: #eef8f2;
}

.plot-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.plot-panel,
.recommendations,
.modes-table {
  padding: 16px;
  margin-bottom: 16px;
}

.panel-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

svg {
  width: 100%;
  height: auto;
  display: block;
}

.axis text,
.plot-label {
  fill: var(--muted);
  font-size: 12px;
}

.axis line,
.axis path,
.grid-line {
  stroke: #d8dfd9;
  stroke-width: 1;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  padding: 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-size: 0.9rem;
}

th {
  color: #39453e;
  font-size: 0.78rem;
  text-transform: uppercase;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  color: white;
  font-size: 0.78rem;
  font-weight: 700;
}

.badge.axial {
  background: var(--axial);
}

.badge.tangential {
  background: var(--tangential);
}

.badge.oblique {
  background: var(--oblique);
}

@media (max-width: 920px) {
  .app-header,
  .app-shell {
    display: block;
  }

  .app-header {
    padding: 18px;
  }

  #exportCsv {
    margin-top: 14px;
    width: 100%;
  }

  .control-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .content {
    padding: 16px;
  }

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

  .panel-heading {
    display: block;
  }

  .panel-heading p {
    margin-top: 4px;
  }
}

@media (max-width: 520px) {
  .metrics {
    grid-template-columns: 1fr;
  }

  .control-panel,
  .content {
    padding: 14px;
  }
}