@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;700&display=swap");

:root {
  --bg-950: #090b0f;
  --bg-900: #11141b;
  --bg-800: #1e2430;
  --text-100: #eef2f9;
  --text-300: #c9d1df;
  --text-500: #a9b2c3;
  --gold-500: #c8a24a;
  --gold-400: #d8b767;
  --gold-300: #e5cc8f;
  --surface: rgba(17, 20, 27, 0.94);
  --surface-alt: rgba(30, 36, 48, 0.92);
  --surface-soft: rgba(24, 29, 38, 0.8);
  --border: rgba(229, 204, 143, 0.24);
  --border-strong: rgba(229, 204, 143, 0.42);
  --shadow-lg: 0 18px 38px rgba(0, 0, 0, 0.42);
  --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.24);
  --positive: #f3c86f;
  --negative: #f08ea8;
  --target: #ffffff;
  --net: #7fd2ff;
  --canvas-top: #151b26;
  --canvas-bottom: #0b0e14;
  --canvas-grid: rgba(229, 204, 143, 0.12);
  --canvas-axis: rgba(229, 204, 143, 0.28);
}

body[data-theme="light"] {
  --bg-950: #e9f4fb;
  --bg-900: #fff4dd;
  --bg-800: #ffffff;
  --text-100: #143241;
  --text-300: #49636d;
  --text-500: #5e7179;
  --gold-500: #0f7e9b;
  --gold-400: #0b5f77;
  --gold-300: #d67b19;
  --surface: rgba(255, 255, 255, 0.97);
  --surface-alt: rgba(246, 251, 253, 0.98);
  --surface-soft: rgba(240, 248, 251, 0.92);
  --border: #c8dbe3;
  --border-strong: #95b8c6;
  --shadow-lg: 0 12px 24px rgba(12, 54, 68, 0.12);
  --shadow-md: 0 10px 18px rgba(12, 54, 68, 0.08);
  --positive: #d67b19;
  --negative: #0f7e9b;
  --target: #123140;
  --net: #7e5af0;
  --canvas-top: #f8fcff;
  --canvas-bottom: #edf7fb;
  --canvas-grid: rgba(15, 126, 155, 0.11);
  --canvas-axis: rgba(18, 49, 64, 0.24);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text-100);
  background:
    radial-gradient(circle at 12% 8%, rgba(216, 183, 103, 0.14), transparent 28%),
    radial-gradient(circle at 86% 88%, rgba(216, 183, 103, 0.08), transparent 30%),
    linear-gradient(165deg, #11141b, #090b0f 58%, #131821);
  line-height: 1.45;
  overflow-x: hidden;
}

body[data-theme="light"] {
  background:
    radial-gradient(1200px 700px at 8% 2%, rgba(19, 143, 176, 0.18), transparent 62%),
    radial-gradient(900px 600px at 92% 98%, rgba(220, 132, 32, 0.18), transparent 66%),
    linear-gradient(165deg, #e9f4fb, #fff4dd);
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--canvas-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--canvas-grid) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at center, black 44%, transparent 96%);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
}

.shell {
  width: min(1480px, calc(100% - 1.4rem));
  margin-inline: auto;
}

.hero {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.15rem 1.25rem 1.2rem;
  padding-right: 12rem;
  background: linear-gradient(140deg, rgba(19, 23, 32, 0.97), rgba(10, 12, 18, 0.97));
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 12px;
  border-radius: 16px 0 0 16px;
  background: var(--gold-500);
}

body[data-theme="light"] .hero {
  background: linear-gradient(160deg, #ffffff, #f7fbfd);
}

.hero-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.hero-copy {
  min-width: 0;
  padding-left: 0.45rem;
}

.kicker {
  margin: 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gold-400);
  font-weight: 700;
}

.hero h1 {
  margin-top: 0.3rem;
  font-size: clamp(1.85rem, 2.8vw, 3.1rem);
  line-height: 1.02;
  color: color-mix(in srgb, var(--text-100) 90%, white 10%);
  overflow-wrap: anywhere;
}

.subtitle {
  margin: 0.42rem 0 0;
  max-width: 74ch;
  color: var(--text-300);
}

.hero-pills {
  margin-top: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.hero-pills span,
.practice-chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
  background: var(--surface-soft);
  color: var(--text-300);
  font-size: 0.82rem;
}

.display-toggle {
  min-width: 152px;
}

.hero-actions {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  z-index: 2;
}

.hero-utility {
  min-width: 132px;
}

.app-layout {
  margin-top: 1rem;
  margin-bottom: 2rem;
  display: grid;
  gap: 0.95rem;
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.panel {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.full {
  grid-column: span 12;
}

.wide {
  grid-column: span 8;
}

.narrow {
  grid-column: span 4;
}

.panel-top,
.analysis-head,
.practice-head,
.orientation-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.inquiry-grid {
  margin-top: 0.75rem;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.inquiry-card,
.practice-card,
.metric-card,
.help-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-alt);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.02);
}

.inquiry-card {
  padding: 0.8rem;
}

.inquiry-card h3,
.practice-card h3 {
  font-size: 1rem;
}

.inquiry-card p {
  margin: 0.35rem 0 0;
  color: var(--text-300);
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.42rem;
  font-size: 0.92rem;
  color: var(--text-300);
}

.controls-grid {
  margin-top: 0.65rem;
  display: grid;
  gap: 0.65rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.control-span-2 {
  grid-column: span 2;
}

.control-note {
  font-size: 0.79rem;
  line-height: 1.35;
  color: var(--text-500);
}

.control-stack-head h3 {
  font-size: 0.95rem;
}

.charge-editor {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.8rem;
  background: var(--surface-alt);
}

.charge-control-list {
  margin-top: 0.7rem;
  display: grid;
  gap: 0.65rem;
  max-height: 320px;
  overflow: auto;
  padding-right: 0.2rem;
}

.charge-control {
  gap: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 0.7rem;
  background: rgba(255, 255, 255, 0.02);
}

.charge-control-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.86rem;
}

.charge-control-head span:last-child {
  color: var(--text-500);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.builder-grid {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.builder-grid-compact {
  grid-template-columns: minmax(0, 1fr);
  max-width: 13rem;
}

.builder-actions {
  margin-top: 0.7rem;
}

.range-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 5.75rem;
  align-items: center;
  gap: 0.55rem;
}

.range-row > input[type="range"] {
  width: 100%;
  min-width: 0;
}

.range-row > input[type="number"] {
  width: 5.75rem;
  text-align: right;
}

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

input,
select,
output {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-alt);
  color: var(--text-100);
  padding: 0.55rem 0.62rem;
}

button {
  border: 1px solid var(--gold-500);
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold-500), var(--gold-400));
  color: #2c1d06;
  font-weight: 700;
  padding: 0.6rem 0.86rem;
  cursor: pointer;
  transition: transform 140ms ease, filter 140ms ease, opacity 140ms ease;
}

button:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
}

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

button.ghost {
  background: rgba(200, 162, 74, 0.11);
  color: var(--text-100);
}

body[data-theme="light"] button {
  background: linear-gradient(160deg, #0d839f, #0b5f77);
  color: #ffffff;
  border-color: #0a5d74;
}

body[data-theme="light"] button.ghost {
  background: #f6fbfd;
  color: var(--text-100);
  border-color: #9dbac5;
}

body[data-theme="light"] .display-toggle {
  background: #eef6fa;
  color: var(--text-100);
  border-color: #b8d1db;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
canvas:focus-visible {
  outline: 3px solid var(--gold-400);
  outline-offset: 2px;
}

.button-row {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.button-row button {
  flex: 1 1 0;
  min-width: 0;
}

.compact-action {
  align-self: flex-start;
  margin-top: 0.1rem;
  padding: 0.45rem 0.7rem;
}

.compact-toggle {
  display: flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: 0.5rem;
  min-height: 40px;
  padding: 0.15rem 0;
}

.compact-toggle input {
  width: 1rem;
  height: 1rem;
  padding: 0;
  accent-color: var(--gold-500);
}

.sim-canvas {
  margin-top: 0.85rem;
  width: 100%;
  display: block;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, var(--canvas-top), var(--canvas-bottom));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
  min-height: 460px;
}

.orientation-prompt,
.analysis-foot {
  max-width: 72ch;
}

.arena-focus {
  max-width: 320px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.7rem 0.8rem;
  background: var(--surface-alt);
}

.focus-label {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-500);
}

.focus-text {
  margin: 0.3rem 0 0;
  color: var(--text-100);
  font-size: 0.93rem;
}

.canvas-foot {
  margin-top: 0.55rem;
  display: grid;
  gap: 0.25rem;
}

.hint {
  margin: 0;
  color: var(--text-300);
  font-size: 0.92rem;
}

.practice-card {
  margin-top: 0.85rem;
  padding: 0.8rem;
}

.question-grid {
  margin-top: 0.7rem;
  display: grid;
  gap: 0.6rem;
}

.question-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  padding: 0.7rem;
}

.question-card p {
  margin: 0 0 0.45rem;
  color: var(--text-100);
  font-size: 0.92rem;
}

.question-card select {
  width: 100%;
}

.metric-strip {
  margin-top: 0.8rem;
  display: grid;
  gap: 0.7rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.metric-card {
  padding: 0.8rem;
}

.metric-card dt {
  margin: 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-500);
}

.metric-card dd {
  margin: 0.3rem 0 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.metric-card p {
  margin: 0.35rem 0 0;
  font-size: 0.84rem;
  color: var(--text-300);
}

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

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.56rem 0.6rem;
  text-align: left;
  font-size: 0.88rem;
}

th {
  background: var(--surface-alt);
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
}

.legend-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.45rem;
}

.legend {
  padding: 0.26rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  border: 1px solid var(--border);
  background: var(--surface-alt);
}

.legend.positive {
  color: var(--positive);
}

.legend.negative {
  color: var(--negative);
}

.legend.target {
  color: var(--target);
}

.legend.net {
  color: var(--net);
}

.legend.contribution {
  color: var(--gold-500);
}

.legend.component {
  color: var(--text-500);
}

.legend.equilibrium {
  color: #d67b19;
}

.is-hidden {
  display: none !important;
}

body.practice-mode .practice-card {
  border-color: var(--border-strong);
}

.compact-table {
  margin-top: 0.8rem;
}

.help-dialog {
  width: min(1180px, calc(100% - 1.4rem));
  max-height: calc(100vh - 2rem);
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  color: var(--text-100);
  box-shadow: var(--shadow-lg);
}

.help-dialog::backdrop {
  background: rgba(9, 11, 15, 0.72);
  backdrop-filter: blur(6px);
}

.help-shell {
  padding: 1rem;
  overflow: auto;
  max-height: calc(100vh - 2rem);
}

.help-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.help-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.help-card {
  padding: 0.9rem;
}

.help-card img {
  display: block;
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  margin: 0.75rem 0;
  background: var(--surface-soft);
}

.help-card p {
  margin: 0;
  color: var(--text-300);
}

.help-list {
  margin: 0.7rem 0 0;
  padding-left: 1.1rem;
  color: var(--text-300);
}

.help-list li + li {
  margin-top: 0.4rem;
}

@media (max-width: 1240px) {
  .wide,
  .narrow {
    grid-column: span 12;
  }
}

@media (max-width: 820px) {
  .hero {
    padding-right: 1rem;
  }

  .display-toggle {
    min-width: 0;
  }

  .hero-actions {
    position: static;
    flex-wrap: wrap;
  }

  .hero-top,
  .panel-top,
  .analysis-head,
  .practice-head,
  .orientation-head {
    flex-direction: column;
  }

  .controls-grid,
  .inquiry-grid,
  .help-grid {
    grid-template-columns: 1fr;
  }

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

  .control-span-2 {
    grid-column: span 1;
  }

  .legend-row {
    justify-content: flex-start;
  }

  .arena-focus {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(1480px, calc(100% - 0.8rem));
  }

  .hero h1 {
    font-size: clamp(1.6rem, 8vw, 2.3rem);
  }

  .button-row {
    flex-direction: column;
  }

  .sim-canvas {
    min-height: 360px;
  }
}