:root{
  --ink:#101820;
  --paper:#FAFBFC;
  --card:#FFFFFF;
  --bib:#FF4D12;
  --bib-dark:#D63A05;
  --sky:#DCE7EE;
  --slate:#5B6770;
  --line:#E2E8EC;
  --good:#1D7A4F;
  --radius:14px;
  --display:'Anton', sans-serif;
  --body:'Archivo', sans-serif;
  --mono:'IBM Plex Mono', monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}
body{
  font-family:var(--body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:3px solid var(--bib);outline-offset:2px;border-radius:4px}

.wrap{max-width:1080px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:20;
  background:rgba(250,251,252,.9);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:62px}
.logo{font-family:var(--display);font-size:1.35rem;letter-spacing:.04em;display:flex;align-items:center;gap:.5rem;text-transform:uppercase;text-decoration:none}
.logo .arrow{color:var(--bib)}
.nav-cta{
  background:var(--ink);color:#fff;border:none;border-radius:999px;
  padding:.55rem 1.2rem;font-weight:600;font-size:.9rem;
}
.nav-cta:hover{background:var(--bib)}

/* ---------- hero ---------- */
.hero{padding:72px 0 56px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:start}
.eyebrow{
  font-family:var(--mono);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--bib-dark);margin-bottom:18px;display:flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:34px;height:2px;background:var(--bib);display:inline-block}
h1{
  font-family:var(--display);font-weight:400;
  font-size:clamp(2.6rem, 6vw, 4.6rem);
  line-height:1.02;text-transform:uppercase;letter-spacing:.01em;
}
h1 .accent{color:var(--bib)}
.hero p.lede{margin-top:22px;font-size:1.12rem;color:var(--slate);max-width:46ch}
.hero-points{margin-top:30px;display:grid;gap:12px;max-width:46ch}
.hero-points div{display:flex;gap:12px;align-items:flex-start;font-size:.97rem}
.tick{
  flex:none;width:22px;height:22px;border-radius:50%;
  background:var(--ink);color:#fff;display:grid;place-items:center;
  font-size:.7rem;margin-top:2px;
}

/* ---------- form card ---------- */
.form-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 18px 44px -22px rgba(16,24,32,.25);
  padding:28px;position:relative;
}
.form-card::before{ /* safety pin notch, race-clipboard nod */
  content:"";position:absolute;top:-9px;left:50%;transform:translateX(-50%);
  width:74px;height:18px;background:var(--ink);border-radius:9px;
}
.form-card h2{font-family:var(--display);font-weight:400;font-size:1.4rem;text-transform:uppercase;letter-spacing:.03em;margin-bottom:4px}
.form-card .sub{color:var(--slate);font-size:.92rem;margin-bottom:20px}
.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1 / -1}
label{font-size:.8rem;font-weight:600;letter-spacing:.02em;color:var(--ink)}
label .opt{color:var(--slate);font-weight:400}
select,input[type=number]{
  font-family:var(--body);font-size:.95rem;color:var(--ink);
  border:1.5px solid var(--line);border-radius:10px;background:#fff;
  padding:.6rem .7rem;width:100%;
}
select:hover,input[type=number]:hover{border-color:#c4ced5}
.range-row{display:flex;align-items:center;gap:14px}
input[type=range]{flex:1;accent-color:var(--bib)}
.range-val{
  font-family:var(--mono);font-weight:600;font-size:.95rem;
  min-width:88px;text-align:right;
}
.generate{
  margin-top:22px;width:100%;
  background:var(--bib);color:#fff;border:none;border-radius:12px;
  font-size:1.02rem;font-weight:700;padding:.95rem;
  letter-spacing:.02em;transition:transform .12s ease, background .12s ease;
}
.generate:hover{background:var(--bib-dark);transform:translateY(-1px)}
.generate:active{transform:translateY(0)}
.form-note{margin-top:12px;font-size:.78rem;color:var(--slate);text-align:center}

/* ---------- finish-line ribbon ---------- */
.ribbon{
  height:26px;margin-top:8px;
  background:
    repeating-conic-gradient(var(--ink) 0% 25%, #fff 0% 50%) 0 0 / 26px 26px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  opacity:.9;
}

/* ---------- results ---------- */
#plan{padding:64px 0 30px;display:none}
#plan.show{display:block;animation:rise .45s ease}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.plan-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:30px}
.plan-head h2{font-family:var(--display);font-weight:400;font-size:clamp(1.8rem,4vw,2.6rem);text-transform:uppercase;line-height:1.05}
.plan-head .meta{font-family:var(--mono);font-size:.82rem;color:var(--slate)}
.print-btn{
  background:#fff;border:1.5px solid var(--ink);border-radius:999px;
  padding:.5rem 1.1rem;font-weight:600;font-size:.88rem;
}
.print-btn:hover{background:var(--ink);color:#fff}

.plan-grid{display:grid;grid-template-columns:300px 1fr;gap:28px;align-items:start}

/* race bib */
.bib{
  background:#fff;border:2px solid var(--ink);border-radius:10px;
  padding:18px 18px 20px;text-align:center;position:relative;
  box-shadow:0 14px 30px -18px rgba(16,24,32,.35);
}
.bib::before,.bib::after,
.bib .pin-l,.bib .pin-r{
  content:"";position:absolute;width:10px;height:10px;border-radius:50%;
  background:var(--paper);border:2px solid var(--ink);
}
.bib::before{top:8px;left:8px}
.bib::after{top:8px;right:8px}
.bib .pin-l{bottom:8px;left:8px}
.bib .pin-r{bottom:8px;right:8px}
.bib .race-name{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;
  border-bottom:2px solid var(--ink);padding-bottom:8px;margin:4px 14px 6px;
}
.bib .number{
  font-family:var(--display);font-size:4.6rem;line-height:1;color:var(--ink);
  letter-spacing:.02em;
}
.bib .number-label{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--bib-dark);margin-top:2px}
.bib .strip{
  margin:14px -2px -2px;background:var(--bib);color:#fff;border-radius:0 0 8px 8px;
  font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;
  padding:7px 0;
}
.stat-list{margin-top:18px;display:grid;gap:10px}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:10px;
  padding:12px 14px;display:flex;justify-content:space-between;align-items:baseline;gap:10px;
}
.stat b{font-family:var(--mono);font-size:1.05rem}
.stat span{font-size:.82rem;color:var(--slate)}

/* chart */
.chart-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 22px 14px;
}
.chart-card h3{font-family:var(--display);font-weight:400;font-size:1.15rem;text-transform:uppercase;letter-spacing:.03em}
.chart-card .sub{font-size:.86rem;color:var(--slate);margin-bottom:14px}
.legend{display:flex;flex-wrap:wrap;gap:16px;margin-top:8px;font-family:var(--mono);font-size:.72rem;color:var(--slate)}
.legend i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:6px;vertical-align:-1px}
svg .bar{transition:opacity .15s}
svg .bar:hover{opacity:.75}

/* weeks */
.weeks{margin-top:28px;display:grid;gap:12px}
details.week{
  background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;
}
details.week[open]{border-color:var(--ink)}
details.week summary{
  list-style:none;display:flex;align-items:center;gap:16px;
  padding:14px 18px;cursor:pointer;flex-wrap:wrap;
}
details.week summary::-webkit-details-marker{display:none}
.wk-num{
  font-family:var(--display);font-size:1.05rem;min-width:74px;
  text-transform:uppercase;letter-spacing:.02em;
}
.wk-tag{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;
  padding:.25rem .6rem;border-radius:999px;border:1px solid currentColor;
}
.tag-build{color:var(--bib-dark)}
.tag-cutback{color:var(--good)}
.tag-peak{color:var(--ink)}
.tag-taper{color:#3A6BB5}
.tag-race{color:#fff;background:var(--bib);border-color:var(--bib)}
.wk-miles{margin-left:auto;font-family:var(--mono);font-size:.88rem;color:var(--slate)}
.wk-caret{transition:transform .2s;color:var(--slate)}
details[open] .wk-caret{transform:rotate(180deg)}
.day-grid{
  display:grid;grid-template-columns:repeat(7,1fr);gap:8px;
  padding:0 18px 18px;
}
.day{
  border:1px solid var(--line);border-radius:8px;padding:10px 10px 12px;
  font-size:.8rem;min-height:88px;background:var(--paper);
}
.day .d-name{font-family:var(--mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--slate);margin-bottom:6px}
.day .d-type{font-weight:700;font-size:.82rem}
.day .d-detail{color:var(--slate);margin-top:3px;font-size:.76rem;line-height:1.35}
.day.run{background:#fff;border-color:#F3C9B8}
.day.key{background:#FFF3ED;border-color:var(--bib)}
.day.race-day{background:var(--ink);color:#fff;border-color:var(--ink)}
.day.race-day .d-name,.day.race-day .d-detail{color:#cfd6db}

.pace-card{
  margin-top:28px;background:var(--sky);border-radius:var(--radius);
  padding:24px 26px;display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;
}
.pace-card h4{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:6px;color:var(--bib-dark)}
.pace-card p{font-size:.88rem;color:var(--ink)}

.disclaimer{margin:26px 0 0;font-size:.78rem;color:var(--slate);max-width:72ch}

/* ---------- how it works ---------- */
.how{padding:64px 0;border-top:1px solid var(--line);margin-top:56px}
.how h2{font-family:var(--display);font-weight:400;font-size:1.9rem;text-transform:uppercase;margin-bottom:30px}
.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.how-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.how-card .mile{
  font-family:var(--display);color:var(--bib);font-size:1.5rem;margin-bottom:10px;
}
.how-card h3{font-size:1rem;margin-bottom:6px}
.how-card p{font-size:.88rem;color:var(--slate)}

/* ---------- static pages (about, privacy, terms, contact) ---------- */
.page{padding:64px 0 80px;max-width:760px;margin:0 auto}
.page h1{font-size:clamp(2rem,5vw,3rem);margin-bottom:8px}
.page .updated{font-family:var(--mono);font-size:.78rem;color:var(--slate);margin-bottom:34px}
.page h2{font-family:var(--display);font-weight:400;font-size:1.3rem;text-transform:uppercase;letter-spacing:.03em;margin:34px 0 10px}
.page p,.page li{color:var(--slate);font-size:.97rem;margin-bottom:12px}
.page ul{padding-left:22px;margin-bottom:12px}
.page a{color:var(--bib-dark)}
.page strong{color:var(--ink)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:26px 0;margin-top:30px}
footer .wrap{display:flex;flex-direction:column;gap:14px;font-size:.82rem;color:var(--slate)}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 22px}
.footer-links a{text-decoration:none}
.footer-links a:hover{color:var(--bib-dark);text-decoration:underline}
.footer-meta{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between}

@media (max-width: 900px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .plan-grid{grid-template-columns:1fr}
  .bib{max-width:320px;margin:0 auto}
  .how-grid{grid-template-columns:1fr}
  .day-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width: 560px){
  .field-grid{grid-template-columns:1fr}
  .day-grid{grid-template-columns:1fr}
  .wk-miles{margin-left:0;width:100%}
}
@media print{
  header,.hero,.how,footer,.print-btn,.ribbon{display:none}
  #plan{padding-top:0}
  details.week{break-inside:avoid}
  details.week:not([open]) .day-grid{display:grid}
}