:root {
  color-scheme: dark;
  --bg: #080a0f;
  --panel: #11151f;
  --panel-2: #151b28;
  --line: rgba(255,255,255,.1);
  --text: #f5f7fb;
  --muted: #97a2b7;
  --soft: #cad1df;
  --accent: #7cf7d4;
  --accent-2: #8aa7ff;
  --warn: #ffcb6b;
  --bad: #ff6b8b;
  --shadow: 0 24px 80px rgba(0,0,0,.45);
}
* { box-sizing: border-box; }
html, body { width: 100%; max-width: 100%; overflow-x: hidden; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 0%, rgba(124,247,212,.17), transparent 34rem),
    radial-gradient(circle at 92% 8%, rgba(138,167,255,.18), transparent 30rem),
    linear-gradient(180deg, #080a0f 0%, #0c1018 100%);
  color: var(--text);
}
button, input { font: inherit; max-width: 100%; min-width: 0; }
button { cursor: pointer; }
.shell { width: min(1500px, calc(100% - 32px)); margin: 0 auto; padding: 34px 0 54px; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) 430px; gap: 24px; align-items: end; margin-bottom: 24px; }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: .14em; font-size: .78rem; font-weight: 800; margin: 0 0 14px; }
h1 { margin: 0; max-width: 900px; font-size: clamp(2.6rem, 6.8vw, 7.4rem); line-height: .88; letter-spacing: -.075em; text-wrap: balance; }
.lede { max-width: 780px; color: var(--muted); font-size: clamp(1rem, 1.7vw, 1.25rem); line-height: 1.55; margin: 22px 0 0; }
code { color: #dce4ff; background: rgba(255,255,255,.06); border: 1px solid var(--line); padding: .15rem .35rem; border-radius: .45rem; }
.hero-card, .panel { min-width: 0; max-width: 100%; background: linear-gradient(180deg, rgba(255,255,255,.055), rgba(255,255,255,.025)); border: 1px solid var(--line); border-radius: 28px; box-shadow: var(--shadow); }
.hero-card { padding: 26px; }
.label, article span, label span { display: block; color: var(--muted); font-size: .86rem; font-weight: 750; letter-spacing: .02em; }
.hero-card strong { display: block; margin-top: 8px; font-size: clamp(1.75rem, 2.8vw, 2.4rem); line-height: 1.05; letter-spacing: -.055em; color: var(--accent); }
.hero-card small { display: block; margin-top: 12px; color: var(--muted); line-height: 1.4; overflow-wrap: anywhere; }
.layout { display: grid; grid-template-columns: minmax(0, 390px) minmax(0, 1fr); gap: 18px; align-items: start; }
.panel { padding: 22px; }
.panel-title { display:flex; align-items: start; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
h2 { margin: 0; font-size: 1.05rem; letter-spacing: -.015em; }
.panel-title p { margin: 6px 0 0; color: var(--muted); font-size: .9rem; }
#resetBtn, .preset { border: 1px solid var(--line); background: rgba(255,255,255,.055); color: var(--soft); border-radius: 999px; padding: 8px 11px; transition: .15s ease; }
#resetBtn:hover, .preset:hover { border-color: rgba(124,247,212,.5); color: var(--text); transform: translateY(-1px); }
.controls { position: static; }
.field, .slider { display:block; margin-bottom: 16px; }
.field span, .slider span { margin-bottom: 8px; }
em { color: #6f7a90; font-style: normal; font-weight: 650; }
input[type="number"] { width: 100%; color: var(--text); background: rgba(0,0,0,.22); border: 1px solid var(--line); border-radius: 14px; padding: 12px 13px; outline: none; }
input[type="number"]:focus { border-color: rgba(124,247,212,.65); box-shadow: 0 0 0 4px rgba(124,247,212,.12); }
input[type="range"] { width: 100%; accent-color: var(--accent); }
.slider input[type="number"] { margin-top: 8px; }
.slider strong { color: var(--text); float: right; }
.quick-row { display:grid; grid-template-columns: 1fr; gap: 8px; margin: -4px 0 18px; }
.fee-grid { display:grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.warning { min-height: 22px; margin: -2px 0 14px; color: var(--warn); font-size: .9rem; }
.warning.bad { color: var(--bad); }
.compact { margin-bottom: 0; }
.chart-panel { min-height: 0; }
.chart-title { align-items: center; }
.legend { display:flex; gap: 14px; flex-wrap: wrap; color: var(--muted); font-size: .86rem; }
.legend i { display:inline-block; width: 24px; height: 3px; border-radius: 999px; vertical-align: middle; margin-right: 7px; }
.legend .spot { background: var(--accent); }
.legend .next { background: var(--accent-2); }
.chart-wrap { width: 100%; max-width: 100%; overflow: hidden; border-radius: 22px; background: #090c12; border: 1px solid rgba(255,255,255,.075); }
svg { display:block; width: 100%; height: auto; }
.grid-line { stroke: rgba(255,255,255,.08); stroke-width: 1; }
.axis-label { fill: #7f8aa1; font: 18px ui-sans-serif, system-ui; }
.spot-line { fill: none; stroke: var(--accent); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.next-line { fill: none; stroke: var(--accent-2); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.trade-area { fill: url(#tradeGradient); opacity: .9; }
.supply-marker { stroke: rgba(255,255,255,.48); stroke-width: 2; stroke-dasharray: 9 9; }
.spot-dot { fill: var(--accent); stroke: #090c12; stroke-width: 3; }
.next-dot { fill: var(--accent-2); stroke: #090c12; stroke-width: 3; }
.chart-callout-bg { fill: rgba(9,12,18,.88); stroke: rgba(255,255,255,.18); stroke-width: 1; }
.chart-callout-title { fill: var(--muted); font: 700 15px ui-sans-serif, system-ui; }
.chart-callout-value { fill: var(--text); font: 800 17px ui-sans-serif, system-ui; }
.metrics { grid-column: 1 / -1; display:grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; padding: 12px; }
.metrics article { background: rgba(0,0,0,.2); border: 1px solid rgba(255,255,255,.08); border-radius: 20px; padding: 16px; min-width: 0; }
.metrics strong { display:block; margin-top: 9px; font-size: clamp(1.02rem, 1.35vw, 1.45rem); line-height: 1.12; letter-spacing: -.04em; overflow-wrap: anywhere; }
.metrics small { display:block; color: var(--muted); margin-top: 7px; }
.table-panel, .formula-panel { grid-column: 1 / -1; min-width: 0; }
.table-wrap { overflow: auto; border: 1px solid rgba(255,255,255,.08); border-radius: 18px; }
table { width: 100%; border-collapse: collapse; min-width: 680px; }
th, td { text-align: right; padding: 13px 16px; border-bottom: 1px solid rgba(255,255,255,.07); }
th:first-child, td:first-child { text-align: left; }
th { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; background: rgba(255,255,255,.035); }
td { color: var(--soft); font-variant-numeric: tabular-nums; }
.formula-grid { display:grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 16px 0; }
.formula-grid code { display:block; padding: 13px; overflow:auto; white-space: nowrap; max-width: 100%; }
.formula-panel p { color: var(--muted); line-height: 1.55; margin-bottom: 0; }
@media (max-width: 1050px) {
  .hero, .layout { grid-template-columns: minmax(0, 1fr); }
  .controls { position: static; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .shell { width: calc(100% - 20px); padding-top: 18px; }
  .hero { gap: 14px; margin-bottom: 14px; }
  h1 { font-size: clamp(2.25rem, 13vw, 3rem); letter-spacing: -.055em; }
  .lede { margin-top: 14px; font-size: .98rem; }
  .panel, .hero-card { padding: 14px; border-radius: 20px; }
  .panel-title { flex-wrap: wrap; gap: 10px; }
  .chart-title { align-items: flex-start; }
  .legend { width: 100%; gap: 8px; }
  .legend span { width: 100%; }
  .chart-wrap { border-radius: 16px; }
  .axis-label { font-size: 24px; }
  .fee-grid, .metrics, .formula-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-card strong { font-size: 1.65rem; }
  .table-wrap { max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
}