:root {
  --bg: #081221;
  --bg-soft: #101f34;
  --panel: #10253d;
  --panel-border: #2d4867;
  --text: #e6f0fb;
  --muted: #9ab4d2;
  --primary: #23c29a;
  --current: #f08a5d;
  --optimized: #54d17b;
  --band-current: rgba(240, 138, 93, 0.18);
  --band-optimized: rgba(84, 209, 123, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  background:
    radial-gradient(1200px 650px at 10% -10%, #1d3557 0%, transparent 60%),
    radial-gradient(900px 500px at 100% 0%, #0f2a46 0%, transparent 55%),
    var(--bg);
  color: var(--text);
}

.page {
  width: min(1100px, 94vw);
  margin: 28px auto 42px;
}

.hero {
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
}

.intro {
  color: var(--muted);
  margin: 10px 0 0;
}

.panel {
  background: linear-gradient(160deg, rgba(16, 37, 61, 0.96), rgba(10, 25, 42, 0.94));
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: 0 18px 35px rgba(4, 10, 20, 0.32);
}

h2 {
  margin: 0 0 12px;
  font-size: 1.28rem;
}

.grid {
  display: grid;
  gap: 12px;
}

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

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.field {
  display: grid;
  gap: 8px;
}

.field > span {
  color: var(--muted);
  font-size: 0.93rem;
  font-weight: 600;
}

input,
select,
button {
  width: 100%;
  height: 46px;
  border-radius: 12px;
  border: 1px solid #3f5f84;
  background: #0d1d31;
  color: var(--text);
  font-size: 1rem;
  padding: 0 12px;
}

input:focus,
select:focus {
  outline: 2px solid rgba(35, 194, 154, 0.25);
  border-color: var(--primary);
}

.field.readonly input {
  background: #132942;
  color: #86a3c3;
}

.simulate-btn {
  margin: 8px 0 16px;
  border: none;
  font-size: 1.06rem;
  font-weight: 700;
  cursor: pointer;
  color: #071521;
  background: linear-gradient(90deg, #1ac298, #5fd97a);
  box-shadow: 0 12px 24px rgba(22, 166, 130, 0.35);
}

.graphs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.graph-card {
  background: linear-gradient(180deg, rgba(16, 37, 61, 0.96), rgba(9, 21, 36, 0.96));
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 14px;
}

.graph-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.summary,
.breakdown {
  white-space: pre-line;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

canvas {
  width: 100%;
  height: auto;
  border-radius: 10px;
  background: rgba(7, 19, 33, 0.7);
  border: 1px solid #264261;
}

@media (max-width: 980px) {
  .graphs {
    grid-template-columns: 1fr;
  }

  .grid.two,
  .grid.three {
    grid-template-columns: 1fr;
  }
}