/* Spiral Sprints — shared stylesheet
   Palette: track concrete + mondo red. One accent, used sparingly. */

:root {
  --ground: #EDEEF0;
  --surface: #FFFFFF;
  --ink: #16181D;
  --steel: #2F4858;
  --mondo: #C4402A;
  --chalk: #7C838C;
  --line: #D3D6DB;

  --display: "Montserrat", "Helvetica Neue", Arial, sans-serif;
  --body: "Figtree", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --wrap: 1080px;
  --gap: clamp(2.5rem, 6vw, 5rem);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.02rem;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: min(100% - 2.5rem, var(--wrap)); margin-inline: auto; }

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.1rem, 6vw, 3.8rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.2rem); }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); }
p { margin: 0 0 1.1em; }
a { color: var(--mondo); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--mondo); outline-offset: 3px; }

/* ---- eyebrow: styled as a lane marker ---- */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--chalk);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.2rem;
}
.eyebrow::after {
  content: "";
  flex: 1;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--line) 0 14px, transparent 14px 22px);
}

/* time / measurement figures — the sport is scored in hundredths */
.t { font-family: var(--mono); font-weight: 600; font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }

/* ---- nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(237,238,240,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 3px solid var(--ink);
}
.nav-in { display: flex; align-items: center; gap: 1.5rem; padding: 0.85rem 0; }
.brand {
  font-family: var(--display); font-weight: 800; font-size: 1.05rem;
  letter-spacing: -0.03em; color: var(--ink); text-decoration: none;
  display: flex; align-items: center; gap: 0.55rem; margin-right: auto;
}
.brand img { height: 32px; width: auto; display: block; }
.nav-links { display: flex; gap: 1.35rem; flex-wrap: wrap; }
.nav-links a {
  font-family: var(--display); font-weight: 600; font-size: 0.9rem;
  color: var(--steel); text-decoration: none; padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover, .nav-links a[aria-current="page"] {
  color: var(--ink); border-bottom-color: var(--mondo);
}
@media (max-width: 640px) {
  .nav-in { flex-wrap: wrap; gap: 0.6rem; }
  .nav-links { gap: 0.9rem; width: 100%; }
  .nav-links a { font-size: 0.82rem; }
}

/* ---- hero: staggered start ---- */
.hero { padding: clamp(3rem, 9vw, 6.5rem) 0 var(--gap); }
.hero h1 { max-width: 16ch; }
.hero h1 .l2 { display: block; padding-left: clamp(0px, 4vw, 3.5rem); }
.hero h1 .l3 { display: block; padding-left: clamp(0px, 8vw, 7rem); color: var(--mondo); }
.hero .lede { font-size: clamp(1.1rem, 1.9vw, 1.3rem); max-width: 54ch; color: var(--steel); }

/* ---- sections ---- */
section { padding-block: var(--gap); }
.rule { border: 0; border-top: 1px solid var(--line); margin: 0; }

/* ---- buttons ---- */
.btn {
  display: inline-block; font-family: var(--display); font-weight: 700;
  font-size: 0.95rem; text-decoration: none; padding: 0.8rem 1.5rem;
  background: var(--ink); color: var(--surface); border: 2px solid var(--ink);
  transition: background 0.15s ease, color 0.15s ease;
}
.btn:hover { background: var(--mondo); border-color: var(--mondo); color: var(--surface); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--surface); border-color: var(--ink); }
.btn-row { display: flex; gap: 0.9rem; flex-wrap: wrap; margin-top: 1.6rem; }

/* ---- grids & cards ---- */
.grid { display: grid; gap: 1.5rem; }
.g2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.g3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 4px solid var(--ink);
  padding: 1.6rem;
}
.card h3 { margin-bottom: 0.4rem; }
.card p:last-child { margin-bottom: 0; }

/* results strip */
.result { background: var(--surface); border: 1px solid var(--line); padding: 1.4rem 1.5rem; }
.result .figure { font-family: var(--mono); font-size: 1.35rem; font-weight: 500; color: var(--mondo); display: block; margin-bottom: 0.35rem; }
.result .who { font-family: var(--display); font-weight: 700; font-size: 1rem; display: block; margin-bottom: 0.3rem; }
.result p { font-size: 0.95rem; color: var(--steel); margin: 0; }

/* ---- pricing ---- */
.tier {
  background: var(--surface); border: 1px solid var(--line);
  display: grid; grid-template-columns: 1fr auto; gap: 1rem;
  padding: 1.4rem 1.5rem; align-items: start;
}
.tier + .tier { border-top: 0; }
.tier h3 { margin-bottom: 0.3rem; font-size: 1.15rem; }
.tier p { margin: 0; font-size: 0.95rem; color: var(--steel); }
.tier .price { font-family: var(--mono); font-size: 1.05rem; white-space: nowrap; text-align: right; }
.tier .price small { display: block; font-size: 0.7rem; color: var(--chalk); letter-spacing: 0.08em; text-transform: uppercase; }
.tier-featured { border-left: 4px solid var(--mondo); }
@media (max-width: 560px) { .tier { grid-template-columns: 1fr; } .tier .price { text-align: left; } }

/* ---- insights hub ---- */
.filters { display: flex; gap: 0.6rem; flex-wrap: wrap; align-items: center; margin-bottom: 2rem; }
.search {
  flex: 1 1 260px; font-family: var(--body); font-size: 1rem;
  padding: 0.7rem 0.9rem; background: var(--surface);
  border: 1px solid var(--line); border-left: 4px solid var(--ink); color: var(--ink);
}
.chip {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.5rem 0.8rem; background: transparent; color: var(--steel);
  border: 1px solid var(--line); cursor: pointer;
}
.chip[aria-pressed="true"] { background: var(--ink); color: var(--surface); border-color: var(--ink); }

.post {
  display: block; background: var(--surface); border: 1px solid var(--line);
  border-left: 4px solid var(--line); padding: 1.6rem; text-decoration: none; color: inherit;
  transition: border-left-color 0.15s ease, transform 0.15s ease;
}
.post:hover { border-left-color: var(--mondo); transform: translateX(3px); }
.post h3 { margin-bottom: 0.5rem; }
.post p { color: var(--steel); font-size: 0.97rem; margin-bottom: 0.9rem; }
.post .meta { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--chalk); display: flex; gap: 1rem; flex-wrap: wrap; }
.empty { padding: 2rem 0; color: var(--chalk); font-family: var(--mono); font-size: 0.9rem; }

/* ---- article ---- */
.article { max-width: 66ch; margin-inline: auto; }
.article h2 { margin-top: 2.4rem; }
.article h3 { margin-top: 1.8rem; }
.article blockquote {
  margin: 2rem 0; padding: 0.2rem 0 0.2rem 1.4rem;
  border-left: 4px solid var(--mondo);
  font-family: var(--display); font-size: 1.2rem; font-weight: 600;
  line-height: 1.25; letter-spacing: -0.01em; color: var(--ink);
}
.toc { background: var(--surface); border: 1px solid var(--line); padding: 1.2rem 1.4rem; margin-bottom: 2.5rem; }
.toc p { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--chalk); margin-bottom: 0.6rem; }
.toc ol { margin: 0; padding-left: 1.1rem; font-size: 0.95rem; }
.toc li { margin-bottom: 0.3rem; }

.refs { margin-top: 3rem; padding-top: 1.5rem; border-top: 3px solid var(--ink); font-size: 0.9rem; }
.refs ol { padding-left: 1.2rem; }
.refs li { margin-bottom: 0.7rem; color: var(--steel); }

.nextup { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.nextup a { font-family: var(--display); font-weight: 700; font-size: 1.15rem; text-decoration: none; }

.draft {
  background: var(--surface); border: 1px dashed var(--mondo);
  padding: 1.4rem 1.5rem; margin-bottom: 2rem;
  font-family: var(--mono); font-size: 0.85rem; color: var(--steel);
}

/* ---- form ---- */
.form { display: grid; gap: 1.1rem; max-width: 34rem; }
.form label { font-family: var(--display); font-weight: 600; font-size: 0.9rem; display: block; margin-bottom: 0.35rem; }
.form input, .form textarea, .form select {
  width: 100%; font-family: var(--body); font-size: 1rem; padding: 0.7rem 0.85rem;
  background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--ink); color: var(--ink);
}
.form textarea { min-height: 8rem; resize: vertical; }

/* ---- footer ---- */
.foot { background: var(--ink); color: #C9CDD3; padding: var(--gap) 0 2.5rem; margin-top: var(--gap); }
.foot a { color: var(--surface); }
.foot .grid { gap: 2rem; }
.foot h4 { color: var(--surface); font-size: 1rem; margin-bottom: 0.7rem; }
.foot ul { list-style: none; margin: 0; padding: 0; font-size: 0.95rem; }
.foot li { margin-bottom: 0.4rem; }
.foot .fine { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid #33373E; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; color: #7C838C; }


/* ---- brand imagery ---- */
.foot-logo {
  height: 72px; width: auto; display: block;
  margin-bottom: 1rem;
}
.portrait {
  width: 100%; height: auto; display: block;
  border-bottom: 4px solid var(--mondo);
}
@media (max-width: 640px) { .brand img { height: 26px; } }


/* ---- calculators ---- */
.calc .calc-note { font-size: 0.92rem; color: var(--steel); }
.calc-row { display: grid; gap: 0.9rem; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); margin: 1.2rem 0; }
.calc-row label {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--chalk); display: block; margin-bottom: 0.35rem;
}
.calc-row input {
  width: 100%; font-family: var(--mono); font-size: 1.05rem; padding: 0.6rem 0.7rem;
  background: var(--ground); border: 1px solid var(--line); border-left: 4px solid var(--ink); color: var(--ink);
}
.calc-out { border-top: 3px solid var(--ink); padding-top: 1rem; }
.out-line { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: 0.3rem 0; }
.out-line span {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--chalk);
}
.out-line strong { font-size: 1.5rem; font-weight: 500; color: var(--mondo); }
.out-line strong em { font-style: normal; font-size: 0.85rem; color: var(--steel); }
.out-verdict { font-size: 0.92rem; color: var(--steel); margin: 0.8rem 0 0; padding-left: 0.9rem; border-left: 3px solid var(--line); }
.out-verdict.good { border-left-color: var(--steel); }
.out-verdict.warn { border-left-color: var(--mondo); }
.out-verdict.note { font-size: 0.85rem; color: var(--chalk); }
.out-table { width: 100%; border-collapse: collapse; margin-top: 1.1rem; font-size: 0.95rem; }
.out-table th {
  font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--chalk); text-align: left; font-weight: 400; padding: 0.4rem 0.6rem 0.4rem 0;
  border-bottom: 1px solid var(--line);
}
.out-table td { padding: 0.35rem 0.6rem 0.35rem 0; border-bottom: 1px solid var(--line); }
.out-table tr:last-child td { border-bottom: 0; }

/* ---- speed reserve calculator ---- */
.sr {
  --accent: var(--mondo);
  --accent-2: var(--steel);
  --ink-muted: var(--steel);
  --ink-faint: var(--chalk);
  --line-strong: #BFC4CB;
}
.sr .sr-group + .sr-group { margin-top: 1.8rem; padding-top: 1.6rem; border-top: 1px solid var(--line); }
.sr .sr-group-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; }
.sr .sr-label {
  font-family: var(--display); font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em;
}
.sr .sr-hint {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--chalk);
}
.sr .unit { color: var(--chalk); }
.sr input.has-value { border-left-color: var(--mondo); }

.sr .endurance-row { display: grid; gap: 0.8rem; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); margin-top: 1.2rem; }
.sr .endurance-opt {
  text-align: left; cursor: pointer; font: inherit; color: inherit;
  background: var(--ground); border: 1px solid var(--line); border-left: 4px solid var(--line);
  padding: 0.9rem 1rem;
}
.sr .endurance-opt:hover { border-left-color: var(--chalk); }
.sr .endurance-opt.active { background: var(--surface); border-left-color: var(--mondo); }
.sr .opt-title { display: block; font-family: var(--display); font-weight: 700; margin-bottom: 0.25rem; }
.sr .opt-desc { display: block; font-size: 0.85rem; line-height: 1.4; color: var(--steel); }
.sr .endurance-note { font-family: var(--mono); font-size: 0.75rem; color: var(--chalk); margin: 0.9rem 0 0; }

.sr .results-title {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--chalk); margin: 0 0 1.2rem;
}
.sr .empty-state { font-family: var(--mono); font-size: 0.9rem; color: var(--chalk); margin: 0; }

.sr .stat-row { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); margin-bottom: 2rem; }
.sr .stat-tile { background: var(--ground); border-top: 3px solid var(--ink); padding: 0.9rem 1rem; }
.sr .stat-dist {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--chalk);
}
.sr .stat-time {
  display: block; font-family: var(--mono); font-variant-numeric: tabular-nums;
  font-size: 1.85rem; line-height: 1.1; color: var(--mondo); margin: 0.3rem 0 0.45rem;
}
.sr .unit-s { font-size: 0.75rem; color: var(--steel); margin-left: 2px; }
.sr .provenance {
  display: flex; align-items: center; gap: 0.4rem;
  font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--chalk);
}
.sr .provenance .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--chalk); }
.sr .provenance.measured .dot { background: var(--mondo); }

.sr .chart-wrap { margin-bottom: 1.5rem; }
.sr .chart-legend {
  display: flex; gap: 1.2rem; flex-wrap: wrap; margin-bottom: 0.9rem;
  font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--chalk);
}
.sr .chart-legend .item { display: flex; align-items: center; gap: 0.4rem; }
.sr .chart-legend .swatch { width: 16px; height: 3px; background: var(--steel); display: inline-block; }
.sr .chart-legend .swatch.dashed { background: repeating-linear-gradient(90deg, var(--chalk) 0 2px, transparent 2px 6px); }
.sr .chart-legend .swatch.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--mondo); }
.sr #curve { width: 100%; height: auto; display: block; }

.sr .fit-line {
  font-family: var(--mono); font-size: 0.76rem; color: var(--steel);
  padding-top: 1rem; border-top: 1px solid var(--line);
}
.sr .fit-line .val { color: var(--mondo); }
.sr .method { margin-top: 0.9rem; }
.sr .method summary { cursor: pointer; font-family: var(--display); font-weight: 600; font-size: 0.9rem; color: var(--steel); }
.sr .method p { font-size: 0.9rem; color: var(--steel); margin: 0.8rem 0 0; }

/* ---- TrainHeroic programme cards ---- */
.th-steps { margin: 0; padding-left: 1.2rem; font-size: 0.95rem; color: var(--steel); }
.th-steps li { margin-bottom: 0.45rem; }
.th-card { display: flex; flex-direction: column; border-top-color: var(--mondo); }
.th-card h3 { margin-bottom: 0.6rem; }
.th-card p { font-size: 0.95rem; color: var(--steel); }
.th-tag {
  font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--chalk); display: block; margin-bottom: 0.7rem;
}
.th-price { font-size: 1.5rem; color: var(--mondo); margin: auto 0 1rem; padding-top: 0.6rem; }
.th-card .btn { align-self: flex-start; }
.th-soon { border-top-color: var(--chalk); }

/* ---- testimonials ---- */
.quotes { align-items: start; }
.quote {
  margin: 0; background: var(--surface); border: 1px solid var(--line);
  border-left: 4px solid var(--mondo); padding: 1.5rem 1.6rem;
}
.quote p { font-size: 0.98rem; color: var(--ink); margin: 0 0 1rem; }
.quote cite {
  font-family: var(--display); font-style: normal; font-weight: 700;
  font-size: 0.95rem; color: var(--steel);
}
.quote cite::before { content: "— "; color: var(--chalk); }
.quote-cta {
  background: var(--ink); color: #C9CDD3; padding: 1.8rem 1.6rem;
  display: flex; flex-direction: column; justify-content: center;
}
.quote-cta .rating {
  font-size: 3.2rem; line-height: 1; color: var(--surface); margin: 0 0 0.5rem;
}
.quote-cta .rating-sub { font-size: 0.95rem; margin: 0; color: #C9CDD3; }
.quote-cta .btn-ghost { color: var(--surface); border-color: var(--surface); }
.quote-cta .btn-ghost:hover { background: var(--surface); color: var(--ink); border-color: var(--surface); }
.th-price .th-sub { font-family: var(--body); font-size: 0.8rem; color: var(--chalk); margin-left: 0.4rem; }

/* ---- programme categories ---- */
.th-cat { margin-top: 3rem; padding-top: 2.4rem; border-top: 1px solid var(--line); }
.th-cat-head { max-width: 62ch; margin-bottom: 1.6rem; }
.th-cat-title {
  font-size: clamp(1.3rem, 2.4vw, 1.75rem); margin: 0 0 0.45rem;
  padding-left: 0.9rem; border-left: 5px solid var(--mondo);
}
.th-cat-desc { color: var(--steel); font-size: 0.95rem; margin: 0; padding-left: 1.05rem; }
/* capped columns so one card doesn't stretch across the page */
.th-grid {
  display: grid; gap: 1.5rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 330px));
  justify-content: start;
}
.th-card h4 {
  font-family: var(--display); font-weight: 700; font-size: 1.15rem;
  letter-spacing: -0.01em; margin: 0 0 0.6rem; line-height: 1.15;
}
.th-foot { margin-top: 2.5rem; color: var(--steel); font-size: 0.95rem; }
@media (max-width: 620px) { .th-grid { grid-template-columns: 1fr; } }

/* ---- in-page jump nav ---- */
.jump { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 1.8rem; }
.jump a {
  font-family: var(--display); font-weight: 600; font-size: 0.85rem;
  text-decoration: none; color: var(--steel);
  background: var(--surface); border: 1px solid var(--line);
  border-left: 4px solid var(--mondo); padding: 0.55rem 0.9rem;
}
.jump a:hover { background: var(--ink); color: var(--surface); border-color: var(--ink); border-left-color: var(--mondo); }

/* ---- cross-sell callout ---- */
.signpost {
  margin-top: 2rem; background: var(--ink); color: #C9CDD3;
  padding: 1.4rem 1.6rem; display: flex; gap: 1.2rem;
  align-items: center; justify-content: space-between; flex-wrap: wrap;
}
.signpost p { margin: 0; font-size: 0.98rem; max-width: 52ch; }
.signpost strong { color: var(--surface); }
.signpost .btn-ghost { color: var(--surface); border-color: var(--surface); white-space: nowrap; }
.signpost .btn-ghost:hover { background: var(--surface); color: var(--ink); border-color: var(--surface); }

/* ---- consultancy service cards ---- */
.svc-card { display: flex; flex-direction: column; }
.svc-card .svc-price {
  font-size: 1.25rem; color: var(--mondo);
  margin: auto 0 1.1rem; padding-top: 1rem;
}
.svc-card .btn { align-self: flex-start; }

/* ---- tier enquiry buttons ---- */
.tier > div:first-child { grid-row: 1 / 3; }
.tier .tier-btn { grid-column: 2; justify-self: end; margin-top: 0.7rem; padding: 0.55rem 1.1rem; font-size: 0.85rem; }
@media (max-width: 560px) {
  .tier > div:first-child { grid-row: auto; }
  .tier .tier-btn { grid-column: 1; justify-self: start; }
}

/* ---- FAQ ---- */
.faq { border-bottom: 1px solid var(--line); padding: 0.9rem 0; }
.faq:first-of-type { border-top: 1px solid var(--line); }
.faq summary {
  cursor: pointer; font-family: var(--display); font-weight: 600;
  font-size: 1rem; color: var(--ink); list-style: none;
  display: flex; justify-content: space-between; gap: 1rem; align-items: baseline;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--mondo); font-size: 1.2rem; }
.faq[open] summary::after { content: "\\2212"; }
.faq p { margin: 0.8rem 0 0.2rem; font-size: 0.95rem; color: var(--steel); }