:root {
  --bg: #0b1117;
  --bg-elevated: #121920;
  --bg-panel: #121920;
  --bg-panel-strong: #161f29;
  --bg-panel-soft: rgba(9, 18, 29, 0.72);
  --grid-line: rgba(130, 164, 191, 0.14);
  --text: #e8f1f7;
  --text-dim: #9bb1c2;
  --accent: #3fd0c9;
  --accent-2: #f0a948;
  --danger: #f16b68;
  --success: #71da8e;
  --warning: #ffce6a;
  --blue: #7fd9ff;
  --border: rgba(140, 176, 199, 0.18);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
  --radius: 18px;
  --font-main: "Segoe UI Variable", "Bahnschrift", "Trebuchet MS", sans-serif;
  --font-mono: "Consolas", "SFMono-Regular", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at top, rgba(56, 114, 156, 0.18), transparent 38%), var(--bg);
  color: var(--text);
  font-family: var(--font-main);
}

body {
  min-height: 100vh;
  overflow-x: hidden;
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(360px, 430px) minmax(0, 1fr);
  gap: 18px;
  width: min(100%, 1820px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 18px;
  align-items: start;
}

.sidebar,
.main-column {
  display: grid;
  gap: 18px;
  min-width: 0;
  align-content: start;
}

.panel {
  background: linear-gradient(180deg, rgba(20, 29, 39, 0.98), rgba(14, 21, 29, 0.94));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  min-width: 0;
}

.hero-panel h1,
.viewer-toolbar h2,
.section-head h2 {
  margin: 0;
}

.hero-panel h1 {
  margin-top: 6px;
  font-size: 1.55rem;
  line-height: 1.1;
}

.hero-panel p,
.panel-copy {
  margin: 10px 0 0;
  color: var(--text-dim);
  line-height: 1.45;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

.field-grid,
.action-grid,
.mode-grid,
.metrics-grid,
.chart-grid {
  display: grid;
  gap: 10px;
}

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

.field-grid {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.full-span {
  grid-column: 1 / -1;
}

label span,
.field-label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-dim);
  font-size: 0.8rem;
}

input[type="number"],
select {
  width: 100%;
  border: 1px solid rgba(143, 179, 201, 0.22);
  border-radius: 10px;
  background: rgba(8, 17, 29, 0.96);
  color: var(--text);
  padding: 9px 10px;
  outline: none;
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

input[type="number"]:focus,
select:focus {
  border-color: rgba(63, 208, 201, 0.8);
  box-shadow: 0 0 0 3px rgba(63, 208, 201, 0.18);
}

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

button {
  border: 1px solid rgba(143, 179, 201, 0.22);
  border-radius: 12px;
  padding: 10px 12px;
  background: linear-gradient(180deg, rgba(22, 35, 51, 0.95), rgba(12, 20, 31, 0.96));
  color: var(--text);
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}

button:hover,
button:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(127, 217, 255, 0.55);
  outline: none;
}

button.primary {
  background: linear-gradient(180deg, rgba(49, 146, 143, 0.92), rgba(22, 90, 94, 0.98));
  border-color: rgba(96, 227, 219, 0.6);
}

button.ghost-button {
  min-width: 72px;
}

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

.mode-card {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-panel-soft);
  cursor: pointer;
}

.mode-card input {
  margin-right: 8px;
}

.mode-card span {
  display: inline-block;
  font-weight: 700;
}

.mode-card small {
  display: block;
  margin-top: 6px;
  color: var(--text-dim);
  line-height: 1.35;
}

.viewer-panel {
  padding-bottom: 12px;
}

.viewer-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 12px;
}

.viewer-readout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  width: min(540px, 100%);
}

.readout-block {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(8, 17, 29, 0.78);
  padding: 10px 12px;
}

.readout-label {
  display: block;
  color: var(--text-dim);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.readout-block strong {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 0.98rem;
}

.viewer-wrap {
  height: min(68vh, 760px);
  min-height: 420px;
  border-radius: 18px;
  border: 1px solid var(--border);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(9, 15, 22, 0.96), rgba(6, 11, 18, 0.98));
}

#viewer {
  display: block;
  width: 100%;
  height: 100%;
}

.scrubber-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  margin-top: 12px;
}

.viewer-subtools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
}

.toggle-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid rgba(140, 176, 199, 0.18);
  border-radius: 999px;
  background: rgba(7, 16, 26, 0.78);
  color: var(--text-dim);
  cursor: pointer;
}

.toggle-chip input {
  margin: 0;
}

.viewer-note {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.84rem;
  line-height: 1.45;
  flex: 1 1 360px;
}

.actions-panel {
  position: sticky;
  top: 18px;
  z-index: 2;
}

input[type="range"] {
  width: 100%;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.pill.neutral {
  background: rgba(130, 164, 191, 0.15);
  color: var(--text-dim);
}

.pill.valid {
  background: rgba(113, 218, 142, 0.18);
  color: var(--success);
}

.pill.warning {
  background: rgba(255, 206, 106, 0.18);
  color: var(--warning);
}

.pill.unsolved {
  background: rgba(241, 107, 104, 0.2);
  color: var(--danger);
}

.metrics-grid {
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
}

.metric-card {
  border: 1px solid rgba(140, 176, 199, 0.14);
  border-radius: 14px;
  padding: 10px 12px;
  background: rgba(7, 16, 26, 0.76);
}

.metric-name {
  color: var(--text-dim);
  font-size: 0.78rem;
}

.metric-value {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.warning-list {
  margin: 0;
  padding-left: 18px;
  color: var(--text-dim);
}

.warning-list li + li {
  margin-top: 8px;
}

.member-force-table {
  display: grid;
  gap: 8px;
}

.member-force-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  border: 1px solid rgba(140, 176, 199, 0.14);
  border-radius: 12px;
  padding: 8px 10px;
  background: rgba(7, 16, 26, 0.76);
}

.member-force-name {
  color: var(--text-dim);
}

.member-force-value {
  font-family: var(--font-mono);
}

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

.chart-card {
  border: 1px solid rgba(140, 176, 199, 0.14);
  border-radius: 16px;
  padding: 12px;
  background: rgba(7, 16, 26, 0.76);
}

.chart-card h3 {
  margin: 0 0 10px;
  font-size: 0.95rem;
}

.chart-card canvas {
  width: 100%;
  height: 220px;
  display: block;
}

.hidden {
  display: none;
}

@media (max-width: 1260px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .viewer-toolbar,
  .status-grid {
    grid-template-columns: 1fr;
    display: grid;
  }

  .viewer-readout,
  .chart-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    width: 100%;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 12px;
  }

  .compact-grid,
  .action-grid,
  .status-grid,
  .chart-grid {
    grid-template-columns: 1fr;
  }

  .viewer-wrap {
    min-height: 340px;
    height: 48vh;
  }
}