:root {
  --navy: #123b5d;
  --blue: #176b91;
  --cyan: #36a9cf;
  --line: #b7d5e3;
  --soft: #eaf7fb;
  --ink: #294f68;
  --muted: #5c7890;
  --panel: rgba(255, 255, 255, 0.96);
  --shadow: 0 12px 34px rgba(22, 91, 126, 0.12);
}

* { box-sizing: border-box; }
html { background: #eaf7fb; }
body {
  margin: 0;
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 0%, rgba(255,255,255,.96), transparent 32rem),
    linear-gradient(145deg, #f8fdff 0%, #e8f7fb 48%, #d4eef7 100%);
  min-height: 100vh;
}

.shell { max-width: 1500px; margin: 0 auto; padding: 18px 22px 28px; }
.hero {
  padding: 28px 34px 25px;
  border: 1px solid #9ed7e9;
  border-radius: 18px;
  background: linear-gradient(116deg, rgba(255,255,255,.98), rgba(205,239,249,.9));
  box-shadow: var(--shadow);
}
.hero h1 { margin: 0; color: var(--navy); font-size: clamp(1.8rem, 3vw, 2.8rem); letter-spacing: -.03em; }
.hero p { margin: 10px 0 0; color: var(--blue); font-size: 1.03rem; font-weight: 600; }

.tabs { display: flex; flex-wrap: wrap; gap: 5px; margin: 16px 0 0; border-bottom: 1px solid var(--line); }
.tab {
  border: 0; border-bottom: 3px solid transparent; background: transparent;
  color: var(--blue); padding: 12px 16px; cursor: pointer; font-weight: 700;
}
.tab:hover, .tab.active { color: var(--navy); border-bottom-color: #ef7d3d; }
.panel { display: none; margin-top: 15px; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); box-shadow: var(--shadow); }
.panel.active { display: block; }

.workflow-figure { margin: 0 0 18px; padding: 10px; border: 1px solid var(--line); border-radius: 12px; background: #fff; overflow: auto; }
.workflow-figure img { display: block; width: 100%; min-width: 760px; height: auto; }
.controls { display: flex; flex-wrap: wrap; align-items: end; gap: 12px; padding: 14px; margin: 12px 0 16px; border: 1px solid #c9e1eb; border-radius: 11px; background: linear-gradient(135deg, #fafdff, #eef9fc); }
label { display: flex; flex: 1 1 190px; flex-direction: column; gap: 6px; color: var(--navy); font-size: .86rem; font-weight: 700; }
select, input { width: 100%; min-height: 39px; padding: 8px 10px; border: 1px solid #a9cfe0; border-radius: 7px; color: var(--navy); background: #fff; font: inherit; }
button.primary, button.download { min-height: 40px; border: 0; border-radius: 7px; padding: 9px 16px; color: #fff; background: linear-gradient(100deg, #2386b0, var(--cyan)); cursor: pointer; font-weight: 800; }
button.download { width: 100%; margin-top: 15px; }
button.primary:hover, button.download:hover { filter: brightness(.95); }
h2 { color: var(--navy); font-size: 1.25rem; }
.caption, .note { color: var(--muted); line-height: 1.55; }
.note { margin: 10px 0 14px; padding: 12px 14px; border-left: 0; border-radius: 7px; background: #f0f9fc; }
code { padding: 2px 5px; border: 1px solid #afd7e6; border-radius: 4px; color: var(--blue); background: #e9f7fb; }
.plot { min-height: 250px; margin: 12px 0; border: 1px solid #cde0e8; border-radius: 10px; overflow: hidden; background: #fff; }
.table-wrap { width: 100%; overflow: auto; border: 1px solid #c6dce6; border-radius: 9px; background: #fff; }
.results-table-wrap { max-height: 430px; }
.data-table { width: 100%; border-collapse: collapse; font-size: .83rem; }
.data-table th { position: sticky; top: 0; z-index: 1; padding: 9px 10px; text-align: left; white-space: nowrap; color: #fff; background: #276e91; }
.data-table td { padding: 8px 10px; border-top: 1px solid #dceaf0; vertical-align: top; }
.data-table tr:nth-child(even) { background: #f4fbfd; }
.data-table tr:hover { background: #e3f4fa; }
.empty-note, .error { padding: 18px; color: var(--muted); }
.up { color: #c84b3f; font-weight: 800; }
.down { color: #176b91; font-weight: 800; }
footer { margin-top: 24px; padding: 22px 10px 4px; border-top: 1px solid var(--line); text-align: center; color: var(--muted); }
footer a { color: var(--navy); font-weight: 800; }
.institutional-footer img { max-width: 230px; max-height: 75px; object-fit: contain; }

@media (max-width: 750px) {
  .shell { padding: 10px; }
  .hero { padding: 22px 20px; }
  .panel { padding: 10px; }
  .tab { flex: 1 1 45%; padding: 10px 8px; font-size: .82rem; }
  .data-table { font-size: .76rem; }
  .results-table-wrap { max-height: 340px; }
}