:root {
  --bg: #ffffff;
  --surface: #fafafa;
  --border: #e5e7eb;
  --muted: #6b7280;
  --text: #0b0b0b;
  --primary: #111111;
  --blue: #3b82f6;
  --green: #22c55e;
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

.container { max-width: 980px; margin: 24px auto; padding: 0 16px; }
header { text-align: center; margin-bottom: 16px; }
h1 { font-size: 26px; line-height: 1.2; margin: 0 0 6px; }
.sub { font-size: 13px; color: var(--muted); }
.card {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 1px 0 rgba(0,0,0,.03);
}
.grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}
@media (min-width: 760px) {
  .grid { grid-template-columns: 1fr 1fr; }
}
label { display: block; font-size: 12px; color: var(--muted); margin: 2px 0 6px; }
.field {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  background: var(--surface);
}
.field input[type="number"],
.field input[type="text"],
.field select {
  border: none;
  outline: none;
  background: transparent;
  width: 100%;
  font-size: 14px;
  color: var(--text);
}
.suffix {
  font-size: 11px;
  color: var(--muted);
  border-left: 1px solid var(--border);
  padding-left: 8px;
}
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 8px; }
.calc-btn {
  appearance: none;
  border: none;
  border-radius: 999px;
  padding: 10px 16px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 2px 0 rgba(0,0,0,.05);
  cursor: pointer;
}
.calc-btn:active { transform: translateY(1px); }
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 28px;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  background: linear-gradient(90deg, #111 0%, #111 var(--v,0%), #ddd var(--v,0%), #ddd 100%);
  border-radius: 999px;
}
input[type="range"]::-moz-range-track {
  height: 6px;
  background: #ddd;
  border-radius: 999px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  margin-top: -6px;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: #111;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,.1);
}
input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: #111;
  border: none;
}
.hint { font-size: 12px; color: var(--muted); }
.stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 14px 0;
}
@media (min-width: 760px) {
  .stats { grid-template-columns: 1fr 1fr 1fr; }
}
.stat {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  background: #fff;
}
.stat h4 { margin: 0 0 6px; font-size: 12px; color: var(--muted); }
.value { font-weight: 700; }
.toolbar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.seg { display: flex; gap: 4px; border: 1px solid var(--border); border-radius: 10px; padding: 4px; background: #fff; }
.seg button {
  border: none;
  background: transparent;
  padding: 6px 8px;
  border-radius: 8px;
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
}
.seg button.active { background: var(--surface); color: var(--text); }
.zoom { display: flex; gap: 6px; }
.zoom button {
    display: flex;
    justify-content: center;
    align-items:    center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  color: black;
}
canvas { width: 100% !important; max-height: 300px; }
.downloads { display: flex; gap: 8px; margin: 10px 0; }
.btn {
  border: 1px solid var(--border);
  background: #181818;
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 12px;
  cursor: pointer;
}
.foot { font-size: 12px; color: var(--muted); }
@media (max-width: 760px) {
  canvas { max-height: 200px; }
  .container { padding: 0 8px; }
  .toolbar { justify-content: center; }
}

/* New: Explicit height constraint on chart section */
.card[aria-label="SIP chart"] {
  max-height: 350px; /* Includes padding/margins */
  overflow: hidden;
}
.card[aria-label="SIP chart"] .toolbar {
  margin-bottom: 8px;
}