:root {
  --sk-bg:     #e8f4ff;
  --sk-border: #b0d4f8;
  --sk-text:   #185890;
  --sk-mid:    #4a90c8;
  --sk-dark:   #0d3060;
}

/* ── Hero ─────────────────────────────────────────── */
.app-hero {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem 1.1rem;
}
.app-hero--sky {
  background: var(--sk-bg);
  border-bottom-color: var(--sk-border);
}
.app-hero__inner { margin: 0 auto; }
.app-hero__title {
  font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 800;
  color: var(--sk-text); letter-spacing: -.02em;
  margin: 0 0 .5rem; line-height: 1.2;
}
.app-hero__desc {
  font-size: .9rem; color: var(--color-text-secondary);
  max-width: 660px; line-height: 1.6; margin: 0 0 .85rem;
}
.app-hero__chips { display: flex; flex-wrap: wrap; gap: .35rem; }
.hero-chip {
  display: inline-flex; align-items: center;
  padding: .22rem .65rem; font-size: .72rem; font-weight: 700;
  background: var(--color-surface); border: 1.5px solid var(--sk-border);
  border-radius: var(--radius-full); color: var(--sk-text); white-space: nowrap;
}

.app-wrap {
  display: flex; gap: 1.5rem; align-items: flex-start;
  max-width: 1140px; margin: 0 auto; padding: 1.5rem 1rem 3rem;
}

.pane-in {
  width: 296px; flex-shrink: 0;
  display: flex; flex-direction: column; gap: 1rem;
  position: sticky; top: 4.5rem;
  max-height: calc(100vh - 5.5rem); overflow-y: auto;
  padding-bottom: .5rem;
}
.pane-in::-webkit-scrollbar { width: 4px; }
.pane-in::-webkit-scrollbar-thumb { background: var(--sk-border); border-radius: 4px; }

.pane-out {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column; gap: 1rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--sk-border);
  border-radius: var(--radius-xl);
  padding: 1rem 1.125rem;
}

.card-title {
  font-size: .7rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--sk-text); margin: 0 0 .75rem;
}

.field { margin-bottom: .7rem; }
.field:last-child { margin-bottom: 0; }
label.lbl {
  display: block; font-size: .72rem; font-weight: 600;
  color: var(--color-text-muted); margin-bottom: .28rem;
}

/* Collapsible card */
.collapsible-card { padding: 0; }
.collapsible-hdr {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 1rem 1.125rem;
  background: none; border: none; cursor: pointer; text-align: left;
  border-radius: var(--radius-xl);
}
.collapsible-hdr:hover { background: var(--sk-bg); }
.collapsible-chevron { font-size: .72rem; color: var(--sk-mid); flex-shrink: 0; }
.collapsible-body { padding: 0 1.125rem 1rem; border-top: 1px solid var(--sk-border); margin-top: 0; }

/* Preset distance grid */
.preset-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: .4rem; margin-bottom: 0;
}
.preset-btn {
  padding: .48rem .25rem; font-size: .78rem; font-weight: 700;
  border: 1.5px solid var(--sk-border); border-radius: var(--radius-md);
  background: none; color: var(--sk-text); cursor: pointer; transition: all .15s;
  text-align: center;
}
.preset-btn:hover { background: var(--sk-bg); }
.preset-btn.active { background: var(--sk-text); color: #fff; border-color: var(--sk-text); }
.preset-btn.custom-btn { grid-column: span 3; font-size: .75rem; }

.custom-dist-row {
  display: flex; gap: .4rem; align-items: center; margin-top: .6rem;
}
.custom-dist-row input {
  flex: 1; padding: .38rem .5rem; font-size: .8rem;
  border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-bg); color: var(--color-text-primary);
}
.custom-dist-row input:focus { outline: none; border-color: var(--sk-mid); }
.custom-dist-row select {
  width: 64px; padding: .38rem .3rem; font-size: .8rem;
  border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-bg); color: var(--color-text-primary);
}

/* Target time */
.time-row { display: flex; align-items: center; gap: .3rem; }
.time-seg {
  width: 50px; text-align: center; padding: .42rem .3rem;
  font-size: .95rem; font-weight: 700;
  border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-bg); color: var(--color-text-primary);
}
.time-seg:focus { outline: none; border-color: var(--sk-mid); }
.time-sep { font-size: 1rem; font-weight: 700; color: var(--color-text-muted); }
.pace-hint { font-size: .72rem; color: var(--sk-text); margin-top: .45rem; font-weight: 600; }

/* Strategy */
.strat-list { display: flex; flex-direction: column; gap: .5rem; }
.strat-opt {
  display: flex; align-items: center; gap: .6rem;
  padding: .55rem .75rem;
  border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  cursor: pointer; transition: all .15s;
}
.strat-opt:hover { border-color: var(--sk-border); background: var(--sk-bg); }
.strat-opt.active { border-color: var(--sk-text); background: var(--sk-bg); }
.strat-opt input[type=radio] { accent-color: var(--sk-text); flex-shrink: 0; margin: 0; }
.strat-name { font-size: .82rem; font-weight: 700; }
.strat-sub { font-size: .68rem; color: var(--color-text-muted); margin-top: .1rem; }

.variance-row { margin-top: .75rem; }
.variance-hdr {
  display: flex; justify-content: space-between;
  font-size: .72rem; margin-bottom: .25rem;
}
.variance-hdr span { color: var(--color-text-muted); }
.variance-hdr strong { color: var(--sk-text); }
.variance-row input[type=range] { width: 100%; accent-color: var(--sk-mid); }

/* Units toggle */
.unit-toggle {
  display: flex; border: 1.5px solid var(--sk-border);
  border-radius: var(--radius-md); overflow: hidden;
}
.unit-btn {
  flex: 1; padding: .42rem .5rem; font-size: .82rem; font-weight: 700;
  background: none; border: none; cursor: pointer;
  color: var(--color-text-muted); transition: all .15s;
}
.unit-btn.active { background: var(--sk-bg); color: var(--sk-text); }

/* Compare */
.toggle-row { display: flex; align-items: center; justify-content: space-between; }
.toggle-lbl { font-size: .82rem; font-weight: 600; color: var(--color-text-muted); }
.compare-body { margin-top: .6rem; }
.compare-hint { font-size: .7rem; color: var(--color-text-muted); margin-bottom: .3rem; line-height: 1.4; }
.actual-ta {
  width: 100%; min-height: 72px; padding: .4rem .5rem;
  font-family: 'SF Mono', 'Fira Mono', monospace; font-size: .78rem;
  border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-bg); color: var(--color-text-primary); resize: vertical;
  box-sizing: border-box;
}
.actual-ta:focus { outline: none; border-color: var(--sk-mid); }

/* Weather */
.weather-result {
  margin-top: .6rem; font-size: .78rem; padding: .45rem .6rem;
  border-radius: var(--radius-md); min-height: 1.5rem;
}
.weather-ok   { color: #1a6b1a; }
.weather-warn { color: #7a3b00; background: #fff8e6; display: block; padding: .3rem .5rem; border-radius: var(--radius-md); border: 1px solid #fbbf24; }

/* Riegel */
.riegel-dist-row { display: flex; gap: .4rem; align-items: center; }
.riegel-select {
  flex: 1; padding: .38rem .5rem; font-size: .8rem;
  border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-bg); color: var(--color-text-primary);
}
.riegel-input-small {
  padding: .38rem .4rem; font-size: .8rem;
  border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-bg); color: var(--color-text-primary);
}
.riegel-prediction {
  margin-top: .6rem; font-size: .82rem; color: var(--color-text-secondary); min-height: 1.2rem;
}
.riegel-prediction strong { color: var(--sk-dark); }
.riegel-use-btn {
  margin-top: .5rem; padding: .4rem .9rem; font-size: .78rem; font-weight: 700;
  background: var(--sk-text); border: none; border-radius: var(--radius-md);
  color: #fff; cursor: pointer; transition: opacity .15s; width: 100%;
}
.riegel-use-btn:hover { opacity: .85; }

/* Elevation */
.elev-hint { font-size: .7rem; color: var(--sk-mid); margin: .3rem 0 0; font-weight: 600; }

/* ---- RIGHT PANE ---- */

/* Stats hero */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: .75rem; }
.stat-cell {
  background: var(--color-surface); border: 1px solid var(--sk-border);
  border-radius: var(--radius-xl); padding: .75rem; text-align: center;
}
.stat-val { font-size: 1.05rem; font-weight: 800; color: var(--sk-text); line-height: 1.2; }
.stat-lbl {
  font-size: .62rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .05em; color: var(--color-text-muted); margin-top: .25rem;
}

/* Chart */
.chart-card {
  background: var(--color-surface); border: 1px solid var(--sk-border);
  border-radius: var(--radius-xl); padding: 1rem 1.125rem;
}
.chart-hdr {
  font-size: .7rem; font-weight: 700; letter-spacing: .07em;
  text-transform: uppercase; color: var(--sk-text); margin-bottom: .6rem;
  display: flex; justify-content: space-between; align-items: center;
}
.chart-legend { font-size: .65rem; color: var(--color-text-muted); font-weight: 400; letter-spacing: 0; text-transform: none; }
#pace-chart { width: 100%; display: block; }

/* Split table */
.table-card {
  background: var(--color-surface); border: 1px solid var(--sk-border);
  border-radius: var(--radius-xl); overflow: hidden;
}
.table-hdr {
  display: flex; justify-content: space-between; align-items: center;
  padding: .8rem 1.125rem; border-bottom: 1px solid var(--sk-border);
}
.table-hdr-title {
  font-size: .7rem; font-weight: 700; letter-spacing: .07em;
  text-transform: uppercase; color: var(--sk-text);
}
.print-btn {
  display: flex; align-items: center; gap: .35rem;
  padding: .38rem .9rem; font-size: .78rem; font-weight: 700;
  background: var(--sk-text); border: none; border-radius: var(--radius-md);
  color: #fff; cursor: pointer; transition: opacity .15s;
}
.print-btn:hover { opacity: .85; }
.table-scroll { max-height: 400px; overflow-y: auto; }
table.spl { width: 100%; border-collapse: collapse; font-size: .8rem; }
table.spl th {
  padding: .5rem .75rem; text-align: left;
  font-size: .67rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
  color: var(--color-text-muted); background: var(--color-bg);
  position: sticky; top: 0; border-bottom: 1px solid var(--sk-border);
}
table.spl td { padding: .48rem .75rem; border-bottom: 1px solid rgba(0,0,0,.04); }
table.spl tr:nth-child(5n) td { background: var(--sk-bg); }
table.spl tr:hover td { background: #d4e8f8; }
.eb { display: inline-block; padding: 2px 7px; border-radius: 999px; font-size: .67rem; font-weight: 700; }
.eb-easy { background: #d4f7d4; color: #1a6b1a; }
.eb-mod  { background: #fff3cc; color: #7a5500; }
.eb-hard { background: #fde4d4; color: #8b2500; }
.eb-max  { background: #ffcccc; color: #7a0000; }
.dev-fast { color: #1a7a2e; font-weight: 700; }
.dev-slow { color: #c0392b; font-weight: 700; }
.table-note { font-size: .68rem; color: var(--color-text-muted); padding: .5rem .75rem; }

/* GAP column */
.gap-col { color: var(--sk-text); }
.gap-adj { font-size: .65rem; color: var(--color-text-muted); margin-left: .25rem; }

/* Predictor card */
.predictor-card { padding: 1rem 1.125rem; }
.predictor-tbl { font-size: .82rem; }
.predictor-row { cursor: pointer; }
.predictor-row:hover td { background: #d4e8f8; }
.predictor-row:focus td { background: var(--sk-bg); outline: 2px solid var(--sk-mid); }
.predictor-current td { font-weight: 700; background: var(--sk-bg); }

/* Wristband overlay */
.wb-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.5); z-index: 2000;
  align-items: center; justify-content: center;
}
.wb-overlay.open { display: flex; }
.wb-box {
  background: #fff; border-radius: 14px; padding: 20px;
  width: min(640px, 94vw); max-height: 90vh; overflow-y: auto;
  box-shadow: 0 16px 48px rgba(0,0,0,.25);
}
.wb-box h3 { font-size: .9rem; font-weight: 700; margin-bottom: 10px; color: var(--sk-text); }
.wb-font-toggle { margin-bottom: 12px; }
.wb-strip {
  border: 2px dashed #bbb; border-radius: 8px; padding: 12px 14px;
  font-family: 'SF Mono', 'Fira Mono', monospace;
}
.wb-race-info { font-size: .78rem; font-weight: 700; margin-bottom: 8px; color: #333; }
.wb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(82px, 1fr)); gap: 3px 6px; }
.wb-split { font-size: .72rem; white-space: nowrap; }
.wb-num { font-weight: 700; display: inline-block; min-width: 22px; color: #333; }
.wb-pace { color: #555; }

/* Readable font mode */
.wb-readable .wb-race-info { font-size: 1rem; margin-bottom: 10px; }
.wb-readable .wb-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 4px 8px; }
.wb-readable .wb-split { font-size: .9rem; }
.wb-readable .wb-num { min-width: 28px; }

/* QR code section */
.wb-qr-wrap { margin-top: 14px; display: flex; flex-direction: column; align-items: flex-start; gap: .3rem; }
#wb-qr-canvas { border: 1px solid #ddd; border-radius: 4px; }

.wb-actions { display: flex; gap: .6rem; justify-content: flex-end; margin-top: 14px; }
.wb-close-btn {
  padding: .4rem 1rem; font-size: .82rem; font-weight: 600;
  background: none; border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md); cursor: pointer; color: var(--color-text-primary);
}
.wb-print-btn {
  padding: .4rem 1rem; font-size: .82rem; font-weight: 700;
  background: var(--sk-text); border: none;
  border-radius: var(--radius-md); color: #fff; cursor: pointer;
}
.wb-print-btn:hover { opacity: .85; }

/* Print - show only wristband content */
#wristband-print { display: none; }
@media print {
  body > *:not(#wristband-print) { display: none !important; }
  #wristband-print { display: block !important; padding: 12px; }
  #wristband-print * { display: revert !important; }
  .wb-strip { border-color: #999; }
  .wb-grid { grid-template-columns: repeat(auto-fill, minmax(78px, 1fr)); }
  .wb-split { font-size: 10px; }
}

@media (max-width: 760px) {
  .app-wrap { flex-direction: column; }
  .pane-in { width: 100%; position: static; max-height: none; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
}

.learn-more{max-width:820px;margin:1.25rem auto 0;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:1.1rem 1.5rem}
.learn-more-title{font-size:1.1rem;font-weight:800;color:var(--fl-text);margin:0 0 .75rem}
.learn-more h3{font-size:1rem;font-weight:800;color:var(--color-text-primary);margin:1.1rem 0 .5rem}
.learn-more p{font-size:.88rem;line-height:1.65;color:var(--color-text-secondary);margin:0 0 .75rem}
.learn-more a{color:var(--fl-text)}
.learn-more .faq-item{margin-bottom:.75rem}
.learn-more .faq-q{font-size:.88rem;font-weight:700;color:var(--color-text-primary);margin:0 0 .25rem}
.learn-more-meta{font-size:.72rem;color:var(--color-text-muted);margin-top:1rem}