:root{
  /* Your palette (in order) */
  --c1: #7B542F;  /* deep cocoa */
  --c2: #B6771D;  /* rich amber */
  --c3: #FF9D00;  /* vivid orange */
  --c4: #FFCF71;  /* soft gold */

  /* neutrals */
  --ink: #2b1d13;         /* dark text for light bg */
  --ink-soft: #4b3424;
  --bg: #FFF8EE;          /* warm off-white page */
  --panel: #FFF4E2;       /* subtle panel fill */
  --radius: 12px;
  --shadow: 0 10px 28px rgba(123,84,47,.14);
}

*{ box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin: 0;
  background: #FFF0D6;
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Noto Sans";
  line-height: 1.5;
}

/* Layout */
.wrap{ max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header{
  background: linear-gradient(180deg, var(--c1) 0%, #6c4929 100%);
  color: #fff7ea;
}
.site-header .wrap{ padding: 28px 20px; }
.site-title{ margin: 0; font-size: 28px; letter-spacing: 0.2px; }
.site-subtitle{ margin: 6px 0 0; color: #ffe6b3; }

/* Main */
#main{ 
  padding: 22px 0 10px; 
}

/* Filters section */
.filters{
  display: flex; 
  flex-wrap: wrap; 
  gap: 10px;
  padding: 14px; 
  margin: 0 0 18px;
  background: #FFF0D6;
}

/* Filter buttons use palette order as states */
.filters .filter{
  border: none;                          
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: .2px;
  cursor: pointer;
  color: #2b1d13;
  background: #e9d8baff;
  transition: transform .08s ease, box-shadow .2s ease, background .2s ease;
  box-shadow: 0 4px 10px rgba(255, 157, 0, .20);
}
.filters .filter:hover{
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(255, 157, 0, .28);
}
.filters .filter.active{
  /* active button climbs palette: c3 -> c2 gradient */
  background: linear-gradient(180deg, var(--c3) 0%, var(--c2) 100%);
  color: #fffaf2;
  box-shadow: 0 6px 16px rgba(182, 119, 29, .35);
}

/* Chart container */
.responsive-svg-container{
  width: 100%;
  max-width: 1000px;
  background: #FFF0D6;
  padding: 12px;
}

/* Notes */
.source-note{ color: var(--ink-soft); font-size: 13px; margin: 10px 2px 0; }

/* Footer (no borders) */
.site-footer{
  margin-top: 28px;
  background: #B6771D;
  color: var(--ink-soft);
}
.site-footer .wrap{ padding: 16px 20px; font-size: 14px; }

/* A11y */
button:focus-visible{ outline: 3px solid var(--c2); outline-offset: 2px; }
.visually-hidden{ position: absolute !important; clip: rect(1px,1px,1px,1px); padding: 0 !important; border: 0 !important; height: 1px !important; width: 1px !important; overflow: hidden; }