/* 248 Anthems — Black Mesa Golf Club · "Five Courses, One Tempo"
 * High-desert identity: basalt, sandstone, sage, sky — with the brand lime
 * held back as the single signal colour, as everywhere else in the series. */

:root {
  --bone: #F2EDE4;
  --paper: #FBF8F3;
  --ink: #1A1512;
  --ink-dim: #6B5D50;
  --rule: #D9CFC0;
  --basalt: #2E2620;
  --charcoal: #211C18;
  --mesa: #8C5A3C;
  --sand: #C6A57E;
  --sage: #7A8471;
  --sky: #6E8CA6;
  --lime: #CCFF00;
  --lime-ink: #5E7300;

  --font-display: 'Space Grotesk Variable', 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Space Grotesk Variable', 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --s1: .25rem; --s2: .5rem; --s3: .75rem; --s4: 1rem;
  --s5: 1.5rem; --s6: 2rem; --s7: 3rem; --s8: 4.5rem; --s9: 7rem;
  --maxw: 1200px;
}

@font-face {
  font-family: 'Space Grotesk Variable';
  src: url('../fonts/space-grotesk-latin-wght-normal.woff2') format('woff2-variations');
  font-weight: 300 700; font-display: swap; font-style: normal;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('../fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');
  font-weight: 400; font-display: swap; font-style: normal;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('../fonts/ibm-plex-mono-latin-500-normal.woff2') format('woff2');
  font-weight: 500; font-display: swap; font-style: normal;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bone);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }

.mono {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-weight: 500;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--s5); }

.skip {
  position: absolute; left: -9999px;
  background: var(--lime); color: var(--ink);
  padding: var(--s2) var(--s4); font-family: var(--font-mono); font-size: .7rem; z-index: 999;
}
.skip:focus { left: var(--s4); top: var(--s4); }

a { color: inherit; }

/* ---------------- masthead ---------------- */

.masthead {
  position: sticky; top: 0; z-index: 90;
  display: flex; align-items: center; justify-content: space-between; gap: var(--s5);
  flex-wrap: wrap;
  padding: var(--s3) var(--s5);
  background: color-mix(in srgb, var(--bone) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.masthead-mark { display: inline-flex; align-items: baseline; gap: .35em; text-decoration: none; }
.mark-num { font-weight: 700; font-size: 1.05rem; letter-spacing: -.02em; }
.mark-word { font-family: var(--font-mono); font-size: .55rem; letter-spacing: .3em; color: var(--ink-dim); }
.masthead-nav { display: flex; gap: var(--s5); }
.masthead-nav a {
  font-family: var(--font-mono); font-size: .6rem; letter-spacing: .16em;
  text-transform: uppercase; text-decoration: none; color: var(--ink-dim);
}
.masthead-nav a:hover { color: var(--ink); }
.masthead-meta { color: var(--ink-dim); margin: 0; display: flex; align-items: center; gap: .5em; }
.key-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--mesa); display: inline-block; }
@media (max-width: 820px) { .nav-opt { display: none; } .masthead-meta { display: none; } }

/* ---------------- hero ---------------- */

.hero { max-width: var(--maxw); margin: 0 auto; padding: var(--s8) var(--s5) var(--s7); }
.crumb { color: var(--ink-dim); margin: 0 0 var(--s5); }
.crumb a { text-decoration: none; }
.crumb a:hover { color: var(--ink); }
.hero-kicker { color: var(--mesa); margin: 0 0 var(--s4); }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 13vw, 9rem);
  line-height: .84; letter-spacing: -.045em; font-weight: 700;
  margin: 0 0 var(--s5);
}
.hero-sub { font-size: 1.06rem; max-width: 62ch; color: var(--ink-dim); margin: 0 0 var(--s7); }
.hero-sub em { color: var(--ink); font-style: italic; }

.claim { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: var(--s5); margin-bottom: var(--s7); }
.claim > div { border-top: 2px solid var(--ink); padding-top: var(--s3); }
.claim span { display: block; color: var(--ink-dim); margin-bottom: var(--s2); }
.claim b { display: block; font-size: 1.5rem; letter-spacing: -.02em; margin-bottom: var(--s2); }
.claim p { margin: 0; font-size: .88rem; color: var(--ink-dim); }

/* ---------------- ratio stripe ---------------- */

.stripe { display: flex; gap: 2px; height: 24px; }
.stripe span { flex: 1; background: var(--rule); transition: background .18s ease; }
.stripe span.lit { background: var(--basalt); }
.stripe span.u-down { background: color-mix(in srgb, var(--lime) 35%, var(--rule)); }
.stripe span.u-down.lit { background: var(--lime); }
.stripe-dark span { background: color-mix(in srgb, var(--bone) 22%, transparent); }
.stripe-dark span.lit { background: var(--bone); }
.stripe-dark span.u-down.lit { background: var(--lime); }
.stripe-caption { display: flex; justify-content: space-between; color: var(--ink-dim); margin: var(--s2) 0 0; }

/* ---------------- section furniture ---------------- */

section { padding: var(--s8) 0; border-top: 1px solid var(--rule); }
.sec-head { display: flex; align-items: center; gap: var(--s4); margin-bottom: var(--s5); }
.sec-no { color: var(--mesa); }
.sec-rule { flex: 1; height: 1px; background: var(--rule); }
.sec-kicker { color: var(--ink-dim); margin: 0; }
.sec-intro { max-width: 74ch; margin-bottom: var(--s7); }
.sec-intro h2 { font-size: clamp(1.8rem, 4.4vw, 3rem); line-height: 1.06; letter-spacing: -.03em; margin: 0 0 var(--s4); }
.sec-sub { color: var(--ink-dim); margin: 0; }

/* ---------------- 01 anthem ---------------- */

.pending {
  border-left: 3px solid var(--mesa);
  background: var(--paper);
  padding: var(--s5); margin-bottom: var(--s6);
}
.pending-kicker { display: block; color: var(--mesa); margin-bottom: var(--s3); }
.pending p { margin: 0 0 var(--s3); font-size: .92rem; color: var(--ink-dim); max-width: 74ch; }
.pending p:last-child { margin-bottom: 0; }
.pending em { color: var(--ink); }

.player-shell { position: relative; background: var(--charcoal); color: var(--bone); padding: var(--s5); }
#spectrum { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; opacity: .8; }
#player { position: relative; z-index: 1; }
.rs-progress-wrap { position: relative; z-index: 1; margin-top: var(--s5); }
.rs-progress-wrap .stripe-caption { color: color-mix(in srgb, var(--bone) 60%, transparent); }
.stage-note { color: var(--ink-dim); margin: var(--s4) 0 0; }

/* ---------------- 02 system ---------------- */

.system-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: var(--s7); align-items: start; }
@media (max-width: 900px) { .system-grid { grid-template-columns: 1fr; } }

.frames-ribbon { margin-bottom: var(--s6); }
.frames { display: flex; gap: 2px; height: 44px; }
.frames.back { margin-bottom: 3px; }
.frames span { flex: 1; background: var(--rule); }
.frames.back span.lit { background: var(--basalt); }
.frames.down { height: 22px; }
.frames.down span { background: color-mix(in srgb, var(--lime) 30%, var(--rule)); }
.frames.down span.lit { background: var(--lime); }
.frames-caption { display: flex; justify-content: space-between; color: var(--ink-dim); margin-top: var(--s2); }

.pulse-block { display: flex; flex-direction: column; align-items: center; gap: var(--s3); }
.pulse-ring { width: min(240px, 60%); height: auto; }
.pulse-ring line { stroke: var(--rule); stroke-width: 1.5; }
.pulse-ring line.q { stroke: var(--mesa); stroke-width: 2.5; }
.pr-outer { stroke: var(--rule); stroke-width: 1; }
.pr-inner { stroke: var(--basalt); stroke-width: 2; }
.pr-num { font-family: var(--font-mono); font-size: 30px; font-weight: 500; fill: var(--ink); }
.pr-unit { font-family: var(--font-mono); font-size: 10px; letter-spacing: .2em; fill: var(--ink-dim); }
.pulse-caption { color: var(--ink-dim); text-align: center; margin: 0; }

.method-cards { display: flex; flex-direction: column; gap: var(--s5); }
.method-card { border-top: 1px solid var(--rule); padding-top: var(--s4); }
.method-card.is-key { border-top: 2px solid var(--mesa); }
.method-card h3 { font-size: 1.15rem; letter-spacing: -.02em; margin: 0 0 var(--s3); display: flex; gap: var(--s3); align-items: baseline; }
.card-no { color: var(--mesa); }
.method-card p { margin: 0 0 var(--s3); font-size: .92rem; color: var(--ink-dim); }
.footnote { font-size: .58rem !important; letter-spacing: .06em; text-transform: none; color: color-mix(in srgb, var(--ink-dim) 78%, transparent) !important; line-height: 1.7; }
.footnote cite { font-style: italic; }

/* ---------------- 03 uses ---------------- */

.uses-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--s5); }
.use { border-top: 1px solid var(--rule); padding-top: var(--s3); }
.use-no { display: block; color: var(--mesa); margin-bottom: var(--s2); }
.use h3 { font-size: 1rem; margin: 0 0 var(--s2); letter-spacing: -.01em; }
.use p { margin: 0; font-size: .86rem; color: var(--ink-dim); }

/* ---------------- 04 the spread ---------------- */

.sp-frame { margin: var(--s6) 0 0; }
#sp-svg { display: block; width: 100%; height: auto; }
.sp-bar { transition: opacity .3s ease; }
.sp-bar-black { fill: var(--basalt); }
.sp-bar-blue  { fill: var(--sky); }
.sp-bar-white { fill: var(--sand); }
.sp-bar-green { fill: var(--sage); }
.sp-bar-gold  { fill: var(--mesa); }
.sp-name { font-family: var(--font-mono); font-weight: 500; font-size: 13px; letter-spacing: .14em; fill: var(--bone); }
.sp-yds { font-family: var(--font-display); font-weight: 700; font-size: 26px; fill: var(--ink); }
.sp-note { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .1em; fill: var(--ink-dim); }
.sp-note-hi { fill: var(--mesa); }
.sp-head { font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em; fill: var(--ink); }
.sp-tick { stroke: color-mix(in srgb, var(--ink-dim) 38%, transparent); stroke-width: 1; }
.sp-tick.beat { stroke: var(--basalt); stroke-width: 2; }
.sp-span { stroke: var(--mesa); stroke-width: 1.5; stroke-dasharray: 5 4; }
.sp-span-cap { stroke: var(--mesa); stroke-width: 1.5; }
.sp-err { font-family: var(--font-mono); font-weight: 500; font-size: 14px; fill: #B4451F; }

.sp-legend { display: flex; flex-wrap: wrap; gap: var(--s4) var(--s6); margin-top: var(--s4); color: var(--ink-dim); }
.sp-legend i { display: inline-block; width: 16px; height: 10px; margin-right: .5em; vertical-align: middle; }
.lg-black { background: var(--basalt); }
.lg-blue  { background: var(--sky); }
.lg-white { background: var(--sand); }
.lg-green { background: var(--sage); }
.lg-gold  { background: var(--mesa); }

.attrib { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--s6); margin-top: var(--s7); }
@media (max-width: 900px) { .attrib { grid-template-columns: 1fr; } }
.attrib-flag { border-left: 3px solid var(--mesa); padding-left: var(--s4); }
.attrib-flag span { display: block; color: var(--mesa); margin-bottom: var(--s2); }
.attrib-flag h3 { font-size: 1.2rem; margin: 0 0 var(--s3); letter-spacing: -.02em; }
.attrib-flag p, .attrib-body p { font-size: .9rem; color: var(--ink-dim); margin: 0 0 var(--s3); }
.attrib-flag strong { color: var(--ink); }

/* ---------------- 05 the ground ---------------- */

.manage { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--s5); }
.manage article { border-top: 1px solid var(--rule); padding-top: var(--s3); }
.manage span { display: block; color: var(--sage); margin-bottom: var(--s2); }
.manage h3 { font-size: 1.05rem; margin: 0 0 var(--s2); letter-spacing: -.01em; }
.manage p { margin: 0; font-size: .88rem; color: var(--ink-dim); }
.ck-caveat { margin-top: var(--s6); border-left: 3px solid var(--basalt); padding-left: var(--s4); }
.ck-caveat p { font-size: .92rem; color: var(--ink-dim); margin: 0; max-width: 78ch; }
.ck-caveat strong { color: var(--ink); }

/* ---------------- 06 record ---------------- */

.record { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: var(--s7); align-items: start; }
@media (max-width: 900px) { .record { grid-template-columns: 1fr; } }

.rec-key { display: flex; flex-wrap: wrap; gap: var(--s4); margin-bottom: var(--s4); font-family: var(--font-mono); font-size: .55rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-dim); }
.rec-key i { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: .5em; vertical-align: middle; }
.k-firm { background: var(--sage); }
.k-conflict { background: var(--mesa); }
.k-thin { background: var(--rule); }

.rec-grid { margin: 0; }
.rec-row { display: grid; grid-template-columns: 130px 1fr; gap: var(--s4); padding: var(--s3) 0; border-top: 1px solid var(--rule); }
@media (max-width: 620px) { .rec-row { grid-template-columns: 1fr; gap: var(--s2); } }
.rec-row dt { color: var(--ink-dim); padding-top: .15em; }
.rec-row dd { margin: 0; font-size: .92rem; }

.fact summary { cursor: pointer; list-style: none; display: flex; flex-wrap: wrap; align-items: center; gap: var(--s2); }
.fact summary::-webkit-details-marker { display: none; }
.fact-val { font-weight: 600; }
.fact-qual { color: var(--ink-dim); font-size: .85rem; }
.chip { font-family: var(--font-mono); font-size: .5rem; letter-spacing: .12em; text-transform: uppercase; padding: .15em .5em; border: 1px solid var(--rule); color: var(--ink-dim); display: inline-flex; align-items: center; gap: .4em; }
.chip i { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
.chip.is-firm i { background: var(--sage); }
.chip.is-conflict i { background: var(--mesa); }
.chip.is-thin i { background: var(--rule); }
.fact-more { padding: var(--s3) 0 0; }
.fact-more p { font-size: .84rem; color: var(--ink-dim); margin: 0 0 var(--s2); max-width: 70ch; }
.fact-more strong { color: var(--ink); }

.caveat { margin-top: var(--s5); border-top: 2px solid var(--ink); padding-top: var(--s3); }
.caveat p { font-size: .86rem; color: var(--ink-dim); margin: 0; }
.caveat strong { color: var(--ink); }

.rec-side { display: flex; flex-direction: column; gap: var(--s5); }
.rec-note { background: var(--paper); padding: var(--s4); border-top: 2px solid var(--rule); }
.rec-note span { display: block; color: var(--mesa); margin-bottom: var(--s2); }
.rec-note h4 { margin: 0 0 var(--s2); font-size: 1rem; letter-spacing: -.01em; }
.rec-note p { margin: 0 0 var(--s3); font-size: .86rem; color: var(--ink-dim); }
.rec-note p:last-child { margin-bottom: 0; }

/* ---------------- 07 related ---------------- */

.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: var(--s4); }
.rel-card { position: relative; display: block; text-decoration: none; border: 1px solid var(--rule); padding: var(--s4); background: var(--paper); transition: border-color .2s ease, transform .2s ease; }
.rel-card:hover { border-color: var(--ink); transform: translateY(-2px); }
.rel-no { display: block; color: var(--mesa); margin-bottom: var(--s3); }
.rel-card h3 { margin: 0 0 var(--s2); font-size: 1.05rem; letter-spacing: -.01em; }
.rel-card p { margin: 0; color: var(--ink-dim); }
.rel-arrow { position: absolute; right: var(--s4); bottom: var(--s4); color: var(--ink-dim); }

/* ---------------- footer ---------------- */

.footer { border-top: 1px solid var(--rule); padding: var(--s7) 0 var(--s6); }
.footer-cols { display: flex; justify-content: space-between; gap: var(--s6); flex-wrap: wrap; margin-top: var(--s5); }
.footer-line { margin: var(--s3) 0 var(--s2); font-size: .92rem; }
.footer-sub { color: var(--ink-dim); margin: 0; }
.footer-links { display: flex; flex-direction: column; gap: var(--s2); }
.footer-links a { text-decoration: none; color: var(--ink-dim); }
.footer-links a:hover { color: var(--ink); }

/* ---------------- reveals ---------------- */

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
.sp-frame { opacity: 0; transition: opacity .7s ease; }
.sp-frame.in { opacity: 1; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .sp-frame { opacity: 1; transform: none; transition: none; }
}

/* ---------------- section grounds ----------------
 * The wrappers exist as anchors and semantic hooks; these give the page its
 * alternating rhythm so sections read as distinct without extra markup. */

.anthems { background: color-mix(in srgb, var(--paper) 70%, var(--bone)); }
.hands { background: color-mix(in srgb, var(--paper) 70%, var(--bone)); }
.creek { background: var(--bone); }
.record-sec { background: color-mix(in srgb, var(--paper) 55%, var(--bone)); }

.footer-inner { display: block; }
.footer-main { max-width: 46ch; }