/* SR Sim - Spartan Racing style guide (Jan 2026):
   colors ffd537 yellow, 5595cf light blue, 0368ab blue, 091e34 navy, ffffff, f2f2f2;
   Barlow Condensed ExtraBold/Bold Italic for titles and headings, Barlow for body. */
:root {
  --sr-yellow: #ffd537;
  --sr-light-blue: #5595cf;
  --sr-blue: #0368ab;
  --sr-navy: #091e34;
  --sr-white: #ffffff;
  --sr-grey: #f2f2f2;
  --sjsu-gold: #e5a823;
  --sjsu-grey: #939597;
  --sjsu-dark-grey: #53565a;

  --bg: var(--sr-grey);
  --panel: var(--sr-white);
  --panel-border: #dfe3e8;
  --text: var(--sr-navy);
  --text-dim: var(--sjsu-dark-grey);
  --accent: var(--sr-blue);
  --bad: #c62828;
  --display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --body: "Barlow", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-family: var(--body);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    linear-gradient(105deg, transparent 0 78%, #e8e8e8 78% 100%) fixed,
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding-bottom: 14px;
}

a { color: var(--sr-light-blue); font-weight: 600; }

/* --- Header --- */
.site-header {
  background: var(--sr-navy);
  position: relative;
  overflow: hidden;
}
.site-header::after {               /* slanted yellow panel, as on the guide's cover */
  content: "";
  position: absolute;
  top: 0; bottom: 0; right: -40px;
  width: 180px;
  background: var(--sr-yellow);
  transform: skewX(-20deg);
}
.site-header::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0; right: 150px;
  width: 26px;
  background: var(--sr-blue);
  transform: skewX(-20deg);
}
.header-inner { position: relative; z-index: 1; padding: 18px 28px 16px; }
.site-header h1 {
  margin: 0;
  font-family: var(--display);
  font-weight: 800;
  font-style: italic;
  font-size: 2.6rem;
  line-height: 1;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--sr-white);
}
.site-header h1 span { color: var(--sr-yellow); }

/* yellow + blue slanted underline from the guide */
.stripe { display: flex; gap: 0; margin-top: 8px; }
.stripe span {
  display: block;
  height: 7px;
  width: 34px;
  transform: skewX(-20deg);
}
.stripe span:first-child { background: var(--sr-yellow); }
.stripe span:last-child { background: var(--sr-blue); }

.footer-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: 8px;
  display: flex;
  z-index: 5;
}
.footer-bar span:first-child { flex: 0 0 68%; background: var(--sr-yellow); }
.footer-bar span:last-child { flex: 1 1 auto; background: var(--sr-blue); }

/* --- Layout --- */
main {
  display: grid;
  grid-template-columns: 350px minmax(0, 1fr);
  gap: 20px;
  padding: 22px 28px 40px;
  align-items: start;
}
@media (max-width: 860px) {
  main { grid-template-columns: 1fr; padding: 16px; }
  .header-inner { padding: 16px; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-top: 4px solid var(--sr-navy);
  border-radius: 4px;
  padding: 18px 18px 20px;
  min-width: 0;
}
.panel h2 {
  margin: 0 0 14px;
  font-family: var(--display);
  font-weight: 700;
  font-style: italic;
  font-size: 1.5rem;
  line-height: 1;
  text-transform: uppercase;
  color: var(--sr-navy);
}
.panel h2::after {
  content: "";
  display: block;
  width: 56px;
  height: 5px;
  margin-top: 6px;
  background: linear-gradient(90deg, var(--sr-yellow) 0 50%, var(--sr-blue) 50% 100%);
  transform: skewX(-20deg);
  transform-origin: left;
}

/* --- Form --- */
label {
  display: block;
  font-size: 0.85rem;
  margin: 12px 0 4px;
  color: var(--text-dim);
}
select, input[type="number"] {
  width: 100%;
  padding: 7px 9px;
  background: var(--sr-white);
  border: 1px solid #cfd5dc;
  border-radius: 3px;
  color: var(--text);
  font-family: var(--body);
  font-size: 0.92rem;
}
select:focus, input[type="number"]:focus {
  outline: 2px solid var(--sr-light-blue);
  outline-offset: 0;
  border-color: var(--sr-light-blue);
}
input[type="checkbox"] { margin-right: 6px; accent-color: var(--sr-blue); }

.sim-info {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin: 8px 0 4px;
  line-height: 1.4;
}
.sim-info .runtime { color: var(--sr-blue); font-weight: 600; }

.param-row { display: flex; align-items: center; gap: 10px; margin: 9px 0; }
.param-row label { flex: 1 1 auto; margin: 0; }
.param-row input { width: 110px; flex: 0 0 auto; }
.param-row input.changed { border-color: var(--sjsu-gold); background: #fff8dc; }

.sweep-block { border-top: 1px solid var(--panel-border); margin-top: 16px; padding-top: 12px; }
.sweep-header { display: flex; align-items: center; gap: 8px; font-size: 0.88rem; }
.sweep-range { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 8px; }
.sweep-range label { margin: 0 0 2px; font-size: 0.75rem; }

.form-actions { display: flex; gap: 10px; margin-top: 20px; }
button#submit-btn, button.secondary {
  font-family: var(--display);
  font-weight: 700;
  font-style: italic;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-size: 1.1rem;
  padding: 9px 16px;
  border: none;
  cursor: pointer;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);   /* slanted, like the guide's swatches */
}
button#submit-btn { flex: 1 1 auto; background: var(--sr-blue); color: var(--sr-white); }
button#submit-btn:hover { background: var(--sr-navy); }
button#submit-btn:disabled { background: var(--sr-light-blue); cursor: wait; }
button.secondary { background: var(--sr-yellow); color: var(--sr-navy); }
button.secondary:hover { background: var(--sjsu-gold); }

#status-line { margin-top: 12px; font-size: 0.86rem; color: var(--text-dim); min-height: 1.2em; line-height: 1.4; }
#status-line.error { color: var(--bad); }
#status-line.done { color: var(--sr-blue); font-weight: 600; }

.spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid var(--sr-light-blue);
  border-top-color: var(--sr-yellow);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 6px;
  vertical-align: -1px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Results --- */
.empty-state { color: var(--text-dim); font-size: 0.95rem; padding: 40px 0; text-align: center; }

.headline {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
  padding: 6px 22px 6px 16px;
  background: var(--sr-navy);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}
.headline .value {
  font-family: var(--display);
  font-weight: 800;
  font-style: italic;
  font-size: 2.3rem;
  color: var(--sr-yellow);
  font-variant-numeric: tabular-nums;
}
.headline .label {
  font-family: var(--display);
  font-weight: 700;
  font-style: italic;
  text-transform: uppercase;
  color: var(--sr-white);
  font-size: 1.05rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}
.stat-card {
  background: var(--sr-grey);
  border-left: 4px solid var(--sr-yellow);
  padding: 10px 12px;
}
.stat-card .label {
  font-family: var(--display);
  font-weight: 700;
  font-style: italic;
  font-size: 0.85rem;
  color: var(--sr-blue);
  text-transform: uppercase;
}
.stat-card .value { font-size: 1.2rem; font-weight: 600; margin-top: 2px; color: var(--sr-navy); }

table.summary { width: 100%; border-collapse: collapse; font-size: 0.86rem; margin-bottom: 18px; }
table.summary td { padding: 5px 8px; border-bottom: 1px solid var(--panel-border); vertical-align: top; }
table.summary tr:nth-child(odd) td { background: #f7f8f9; }
table.summary td:first-child { color: var(--text-dim); width: 38%; }
table.summary td:last-child { font-variant-numeric: tabular-nums; color: var(--sr-navy); }

.chart-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 16px; }
.chart-wrap {
  background: var(--sr-white);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  padding: 12px 14px 14px;
  margin-bottom: 16px;
  min-width: 0;
}
.chart-grid .chart-wrap { margin-bottom: 0; }
.chart-wrap h3 {
  margin: 0 0 8px;
  font-family: var(--display);
  font-weight: 700;
  font-style: italic;
  font-size: 1.1rem;
  text-transform: uppercase;
  color: var(--sr-navy);
}
.chart-wrap canvas { max-height: 320px; }
.chart-wrap.map canvas { max-height: 520px; }
.chart-wrap .chart-note { font-size: 0.78rem; color: var(--text-dim); margin-top: 6px; }

.section-title {
  font-family: var(--display);
  font-weight: 700;
  font-style: italic;
  font-size: 1.3rem;
  text-transform: uppercase;
  color: var(--sr-navy);
  margin: 24px 0 10px;
}
.metadata-note {
  font-size: 0.8rem;
  color: var(--text-dim);
  border-left: 3px solid var(--sr-yellow);
  padding: 6px 10px;
  margin-bottom: 16px;
  background: var(--sr-grey);
}