* {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
  --bg-top: #071222;
  --bg-bottom: #eef4fb;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #ffffff;
  --surface-muted: #f4f8fc;
  --border: rgba(119, 145, 179, 0.22);
  --border-strong: rgba(97, 127, 170, 0.32);
  --ink: #172235;
  --muted: #5c708d;
  --primary: #2962ff;
  --primary-dark: #174dde;
  --success-bg: #edf9f3;
  --success-border: #bee8cf;
  --success-ink: #1b6f43;
  --warn-bg: #fff7e8;
  --warn-border: #f0d699;
  --warn-ink: #8f5c00;
  --danger-bg: #fff0f0;
  --danger-border: #f0c0c0;
  --danger-ink: #972b2b;
  --neutral-bg: #eff4ff;
  --neutral-border: #d3e0ff;
  --neutral-ink: #426083;
  --shadow-lg: 0 24px 60px rgba(18, 39, 74, 0.16);
  --shadow-sm: 0 10px 26px rgba(18, 39, 74, 0.08);
  --radius-xl: 22px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Segoe UI", Tahoma, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(47, 107, 255, 0.22), transparent 24%),
    radial-gradient(circle at top right, rgba(17, 183, 163, 0.18), transparent 18%),
    linear-gradient(180deg, var(--bg-top) 0, #16253f 300px, var(--bg-bottom) 301px, #f5f8fc 100%);
}

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

.app-shell {
  width: min(1460px, calc(100% - 32px));
  margin: 24px auto 48px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

.glass {
  background: linear-gradient(145deg, rgba(255,255,255,0.18), rgba(255,255,255,0.08));
  border-color: rgba(255,255,255,0.18);
  color: #f4f8ff;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  padding: 28px;
}

.hero h1,
.hero p,
.hero .eyebrow,
.hero .pill {
  color: inherit;
}

.hero h1,
.section-head h2,
.settings-group h3 {
  margin: 0;
}

.hero-copy {
  max-width: 820px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  font-weight: 700;
  opacity: 0.8;
}

.hero .sub {
  margin: 10px 0 0;
  max-width: 780px;
  font-size: 16px;
  line-height: 1.55;
  opacity: 0.92;
}

.hero-meta,
.hero-actions,
.badges,
.toolbar,
.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.hero-meta {
  margin-top: 18px;
}

.hero-actions {
  justify-content: flex-end;
}

.pill,
.badge,
.note-pill,
.precision-pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.pill {
  background: rgba(255,255,255,0.14);
  border-color: rgba(255,255,255,0.22);
}

.pill.muted {
  opacity: 0.85;
}

.overview-grid,
.workspace-grid,
.results-grid {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.overview-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.workspace-grid {
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1.35fr) minmax(300px, 0.95fr);
  align-items: start;
}

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

.stat-card {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-label {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  font-weight: 800;
}

.stat-value {
  font-size: 30px;
  line-height: 1.1;
}

.stat-note {
  color: var(--muted);
  font-size: 13px;
}

.input-panel,
.plot-panel,
.results-grid .panel,
.settings-panel {
  padding: 20px;
}

.settings-panel {
  position: sticky;
  top: 16px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.section-head.compact {
  margin-bottom: 12px;
}

.section-head p,
.panel p,
.settings-group p {
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.badge.neutral,
.precision-pill.neutral {
  background: var(--neutral-bg);
  border-color: var(--neutral-border);
  color: var(--neutral-ink);
}

.badge.success,
.note-pill.success,
.precision-pill.success {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success-ink);
}

.badge.warn,
.note-pill.warn,
.precision-pill.warn {
  background: var(--warn-bg);
  border-color: var(--warn-border);
  color: var(--warn-ink);
}

.badge.danger,
.note-pill.danger,
.precision-pill.danger {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger-ink);
}

textarea,
select,
input[type="number"] {
  width: 100%;
  border: 1px solid rgba(123, 146, 179, 0.28);
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  color: var(--ink);
  padding: 13px 14px;
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

textarea:focus,
select:focus,
input[type="number"]:focus {
  border-color: rgba(41, 98, 255, 0.55);
  box-shadow: 0 0 0 4px rgba(41, 98, 255, 0.12);
}

textarea {
  min-height: 240px;
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  line-height: 1.45;
}

select,
input[type="number"] {
  width: 100%;
}

.toolbar {
  margin-bottom: 12px;
}

.row {
  margin-top: 12px;
  align-items: center;
}

.split-row label {
  color: var(--muted);
  font-weight: 700;
}

button {
  min-height: 42px;
  padding: 10px 15px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: linear-gradient(180deg, #3473ff 0%, var(--primary) 100%);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(41, 98, 255, 0.22);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(41, 98, 255, 0.24);
  background: linear-gradient(180deg, #2b69f5 0%, var(--primary-dark) 100%);
}

button.secondary {
  color: #1e4ca8;
  background: linear-gradient(180deg, #f2f7ff 0%, #e8f0ff 100%);
  border-color: rgba(105, 142, 211, 0.3);
  box-shadow: none;
}

button.secondary:hover {
  background: #deebff;
}

button.ghost {
  color: var(--muted);
  background: rgba(255,255,255,0.72);
  border-color: rgba(119, 145, 179, 0.22);
  box-shadow: none;
}

button.ghost:hover {
  background: rgba(241, 246, 255, 0.95);
}

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

.summary {
  margin-top: 14px;
  padding: 14px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  overflow: auto;
}

.summary.neutral {
  background: var(--neutral-bg);
  border-color: var(--neutral-border);
  color: var(--neutral-ink);
}

.summary.success {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success-ink);
}

.summary.warn {
  background: var(--warn-bg);
  border-color: var(--warn-border);
  color: var(--warn-ink);
}

.summary.danger {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger-ink);
}

.summary h3 {
  margin: 0 0 10px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.metric {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(119, 145, 179, 0.18);
  border-radius: 14px;
  padding: 12px;
}

.metric-label {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.metric-value {
  color: var(--ink);
  font-size: 17px;
  font-weight: 800;
}

.table-shell {
  border: 1px solid rgba(119, 145, 179, 0.18);
  border-radius: 16px;
  overflow: auto;
  background: rgba(248, 251, 255, 0.7);
}

.empty-state {
  padding: 20px;
  color: var(--muted);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 860px;
}

.data-table th,
.data-table td {
  padding: 11px 12px;
  border-bottom: 1px solid rgba(119, 145, 179, 0.16);
  text-align: right;
  vertical-align: top;
}

.data-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #eef4ff;
  color: #37516f;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.data-table th:first-child,
.data-table td:first-child,
.data-table th:nth-child(2),
.data-table td:nth-child(2),
.data-table th:nth-child(8),
.data-table td:nth-child(8),
.data-table td:last-child,
.data-table th:last-child {
  text-align: left;
}

.data-table tbody tr:nth-child(even) {
  background: rgba(255,255,255,0.55);
}

.data-table tbody tr:hover {
  background: rgba(41, 98, 255, 0.05);
}

#plot {
  width: 100%;
  max-width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(119, 145, 179, 0.2);
  background: linear-gradient(180deg, rgba(250, 252, 255, 0.98), rgba(243, 248, 255, 0.98));
}

.small-text {
  display: block;
  margin-top: 10px;
  line-height: 1.45;
}

.settings-group {
  padding: 16px;
  border-radius: 16px;
  border: 1px solid rgba(119, 145, 179, 0.16);
  background: rgba(248, 251, 255, 0.75);
  margin-bottom: 14px;
}

.muted-panel {
  background: rgba(241, 246, 255, 0.72);
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
  margin-top: 12px;
}

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

.stacked-field {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.stacked-field span {
  color: var(--muted);
  font-weight: 700;
}

@media (max-width: 1260px) {
  .overview-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .workspace-grid,
  .results-grid {
    grid-template-columns: 1fr;
  }

  .settings-panel {
    position: static;
  }
}

@media (max-width: 820px) {
  .app-shell {
    width: min(100% - 18px, 100%);
    margin: 12px auto 28px;
  }

  .hero,
  .section-head {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions {
    justify-content: flex-start;
  }

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

  .panel,
  .input-panel,
  .plot-panel,
  .results-grid .panel,
  .settings-panel {
    padding: 16px;
  }

  .data-table {
    min-width: 760px;
  }
}