:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-soft: #0c1a2d;
  --card: rgba(255, 255, 255, 0.08);
  --card-strong: rgba(255, 255, 255, 0.12);
  --line: rgba(255, 255, 255, 0.16);
  --text: #f6f8fb;
  --muted: #aab7c8;
  --accent: #79ffe1;
  --accent-2: #ffcf6a;
  --danger: #ff7f9f;
  --ok: #9dffb4;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(121, 255, 225, 0.18), transparent 34rem),
    radial-gradient(circle at bottom right, rgba(255, 207, 106, 0.12), transparent 30rem),
    linear-gradient(135deg, #07111f 0%, #0d1526 48%, #07111f 100%);
}

button,
input { font: inherit; }

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(24px, 4vw, 56px) 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: clamp(18px, 4vw, 40px);
  align-items: end;
  margin-bottom: clamp(18px, 3vw, 34px);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
p { margin-top: 0; }

h1 {
  margin-bottom: 14px;
  font-size: clamp(2.6rem, 9vw, 6.2rem);
  line-height: 0.9;
  letter-spacing: -0.08em;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.2rem, 2.5vw, 1.65rem);
  letter-spacing: -0.03em;
}

.lede {
  max-width: 740px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.6;
}

.result-card,
.control-panel,
.chart-panel,
.mobile-details {
  border: 1px solid var(--line);
  background: linear-gradient(145deg, var(--card), rgba(255, 255, 255, 0.045));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.result-card {
  border-radius: 28px;
  padding: 24px;
}

.result-label,
.result-meta {
  display: block;
  color: var(--muted);
}

.result-value {
  display: block;
  margin: 8px 0 4px;
  color: var(--accent-2);
  font-size: clamp(2.2rem, 7vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.015em;
  word-spacing: 0.08em;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(280px, 380px) minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
  align-items: stretch;
}

.control-panel,
.chart-panel {
  border-radius: 30px;
  padding: clamp(18px, 3vw, 28px);
}

.panel-heading,
.chart-heading {
  margin-bottom: 22px;
}

.chart-heading {
  display: flex;
  gap: 16px;
  justify-content: space-between;
  align-items: start;
}

.input-grid { display: block; }

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.field-label {
  font-weight: 760;
}

.label-mobile { display: none; }

.field input {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 18px;
  padding: 15px 16px;
  color: var(--text);
  background: rgba(4, 11, 21, 0.74);
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(121, 255, 225, 0.14);
  background: rgba(4, 11, 21, 0.9);
}

.field small {
  color: var(--muted);
}

.error {
  min-height: 1.2em;
  color: var(--danger);
  font-style: normal;
  font-weight: 700;
}

.field.has-error input {
  border-color: var(--danger);
  box-shadow: 0 0 0 4px rgba(255, 127, 159, 0.12);
}

.formula-box,
.situation-box {
  display: grid;
  gap: 6px;
  margin: 22px 0;
  padding: 16px;
  border: 1px solid rgba(121, 255, 225, 0.22);
  border-radius: 20px;
  background: rgba(121, 255, 225, 0.07);
}

.formula-box span,
.situation-box span {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.formula-box code {
  white-space: normal;
  color: var(--text);
}

.situation-box strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.25;
}

.situation-box p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.42;
}

.secondary-button {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  padding: 13px 16px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.secondary-button:hover,
.secondary-button:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent);
  background: rgba(121, 255, 225, 0.12);
}

.status-pill {
  flex: 0 0 auto;
  border: 1px solid rgba(157, 255, 180, 0.35);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--ok);
  background: rgba(157, 255, 180, 0.08);
  font-size: 0.86rem;
  font-weight: 800;
}

.status-pill.is-error {
  border-color: rgba(255, 127, 159, 0.45);
  color: var(--danger);
  background: rgba(255, 127, 159, 0.08);
}

.canvas-wrap {
  min-height: 360px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 24px;
  overflow: hidden;
  background: rgba(2, 7, 14, 0.42);
}

canvas {
  display: block;
  width: 100%;
  height: clamp(360px, 52vw, 520px);
}

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

.insight-card {
  min-height: 96px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.055);
}

.insights.is-invalid {
  grid-template-columns: 1fr;
}

.insight-card.is-error {
  border-color: rgba(255, 127, 159, 0.34);
  background: rgba(255, 127, 159, 0.08);
}

.insight-card span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.insight-card strong {
  display: block;
  color: var(--text);
  font-size: 1.15rem;
  line-height: 1.25;
}

.mobile-details { display: none; }

@media (max-width: 880px) {
  .hero,
  .workspace {
    grid-template-columns: 1fr;
  }

  .hero { align-items: stretch; }

  .chart-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .status-pill { width: fit-content; }
}

@media (max-width: 620px) {
  body {
    background:
      radial-gradient(circle at 12% 0%, rgba(121, 255, 225, 0.14), transparent 18rem),
      linear-gradient(180deg, #07111f 0%, #0b1424 54%, #07111f 100%);
  }

  .app-shell {
    width: min(100% - 16px, 1180px);
    padding-top: max(8px, env(safe-area-inset-top));
    padding-bottom: max(18px, env(safe-area-inset-bottom));
  }

  .hero {
    display: block;
    margin-bottom: 8px;
  }

  .hero .eyebrow,
  .hero .lede--desktop,
  .result-card--desktop,
  .panel-heading,
  .chart-heading,
  .chart-panel > .insights,
  .formula-box--desktop,
  .situation-box--desktop {
    display: none;
  }

  h1 {
    margin: 0 0 8px;
    font-size: clamp(2.15rem, 12vw, 2.9rem);
    line-height: 0.92;
    letter-spacing: -0.075em;
  }

  .workspace {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .chart-panel {
    order: 1;
    border-radius: 24px;
    padding: 9px;
  }

  .control-panel {
    order: 2;
    border-radius: 24px;
    padding: 12px;
  }

  .mobile-details {
    order: 3;
    display: grid;
    gap: 10px;
    border-radius: 24px;
    padding: 12px;
  }

  .control-panel,
  .chart-panel,
  .mobile-details {
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.28);
  }

  .canvas-wrap {
    min-height: 0;
    border-radius: 18px;
  }

  canvas {
    height: clamp(210px, 54vw, 246px);
  }

  .input-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    align-items: start;
  }

  .field {
    min-width: 0;
    gap: 5px;
    margin-bottom: 0;
  }

  .label-desktop { display: none; }
  .label-mobile { display: inline; }

  .field-label {
    color: rgba(246, 248, 251, 0.86);
    font-size: 0.76rem;
    font-weight: 820;
    letter-spacing: 0.02em;
  }

  .field input {
    min-height: 44px;
    border-radius: 14px;
    padding: 10px 11px;
    font-size: 1.02rem;
    background: rgba(5, 12, 24, 0.82);
  }

  .field small { display: none; }

  .error {
    min-height: 0;
    font-size: 0.68rem;
    line-height: 1.22;
  }

  .error:empty { display: none; }

  .reset-field {
    align-self: end;
    min-height: 44px;
    border-radius: 14px;
    padding: 10px 12px;
    font-weight: 780;
    background: rgba(255, 255, 255, 0.1);
  }

  .result-card--mobile {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 3px 12px;
    align-items: end;
    border-radius: 20px;
    padding: 13px 14px;
    box-shadow: none;
  }

  .result-card--mobile .result-label {
    grid-column: 1 / -1;
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 850;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .result-card--mobile .result-value {
    margin: 0;
    font-size: clamp(1.8rem, 9.5vw, 2.45rem);
  }

  .result-card--mobile .result-meta {
    align-self: center;
    color: var(--muted);
    font-size: 0.86rem;
    text-align: right;
  }

  .mobile-details .insights {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-top: 0;
  }

  .mobile-details .insights.is-invalid {
    grid-template-columns: 1fr;
  }

  .mobile-details .insight-card {
    min-height: 68px;
    border-radius: 16px;
    padding: 10px;
  }

  .mobile-details .insight-card span {
    margin-bottom: 5px;
    font-size: 0.62rem;
    letter-spacing: 0.07em;
  }

  .mobile-details .insight-card strong {
    font-size: 0.88rem;
    line-height: 1.22;
  }

  .formula-box,
  .situation-box {
    margin: 0;
    border-radius: 18px;
    padding: 12px;
  }

  .formula-box span,
  .situation-box span {
    font-size: 0.68rem;
    letter-spacing: 0.09em;
  }

  .formula-box code,
  .situation-box p {
    font-size: 0.86rem;
  }

  .situation-box strong {
    font-size: 0.95rem;
  }

  .lede--mobile {
    max-width: none;
    color: rgba(170, 183, 200, 0.88);
    font-size: 0.88rem;
    line-height: 1.42;
  }
}