/* ===========================================================
   Poseidon Ho — Piano Studies  ·  Greg Spero
   Design system: warm "studio at night" — ebony, ivory, brass
   =========================================================== */
:root{
  --ink:#0c0b10;            /* near-black background */
  --ink-2:#141220;          /* panel */
  --ink-3:#1d1a2b;          /* raised panel */
  --line:#2c2740;           /* hairlines */
  --ivory:#f4efe6;          /* primary text (key ivory) */
  --ivory-dim:#cdc6ba;
  --muted:#8d8699;
  --brass:#d9a441;          /* primary accent (brass / candlelight) */
  --brass-soft:#e9c987;
  --rose:#c97b8a;           /* secondary accent */
  --teal:#6fb6a6;           /* tertiary (used for "do this") */
  --ok:#79c98b;
  --bad:#e0726b;
  --radius:16px;
  --radius-sm:10px;
  --maxw:1080px;
  --shadow:0 20px 60px -20px rgba(0,0,0,.7);
  --serif:"Cormorant Garamond",Georgia,serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:
    radial-gradient(1200px 700px at 78% -8%,rgba(217,164,65,.10),transparent 60%),
    radial-gradient(900px 600px at 8% 12%,rgba(201,123,138,.07),transparent 55%),
    var(--ink);
  color:var(--ivory);font-family:var(--sans);font-size:17px;line-height:1.62;
  letter-spacing:.005em;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
a{color:var(--brass-soft);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.08;letter-spacing:.01em;margin:0 0 .4em}
h1{font-size:clamp(2.6rem,6vw,4.6rem)}
h2{font-size:clamp(2rem,4vw,3rem)}
h3{font-size:1.5rem;font-family:var(--sans);font-weight:650;letter-spacing:-.01em}
h4{font-size:1.05rem;font-family:var(--sans);font-weight:650;text-transform:uppercase;letter-spacing:.12em;color:var(--brass-soft)}
p{margin:0 0 1em}
strong{color:#fff;font-weight:650}
em{color:var(--brass-soft);font-style:italic}
code,.mono{font-family:"SF Mono",ui-monospace,"Cascadia Code",monospace;font-size:.92em}
.kbd{background:var(--ink-3);border:1px solid var(--line);border-radius:6px;padding:.06em .42em;color:var(--ivory)}

/* ---------- top nav ---------- */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(12,11,16,.72);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:18px;height:60px}
.nav .brand{font-family:var(--serif);font-size:1.3rem;font-weight:600;color:var(--ivory);white-space:nowrap}
.nav .brand b{color:var(--brass)}
.nav .links{margin-left:auto;display:flex;gap:22px;font-size:.86rem;letter-spacing:.04em}
.nav .links a{color:var(--ivory-dim)}
.nav .links a:hover{color:var(--brass-soft);text-decoration:none}
@media(max-width:760px){.nav .links{display:none}}

/* ---------- hero ---------- */
.hero{position:relative;padding:96px 0 64px;overflow:hidden}
.hero .eyebrow{font-family:var(--sans);text-transform:uppercase;letter-spacing:.34em;
  font-size:.74rem;color:var(--brass);margin-bottom:24px;font-weight:600}
.hero h1{max-width:14ch;margin-bottom:.25em;background:linear-gradient(180deg,#fff,#d8cfbf);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lede{font-size:1.32rem;max-width:46ch;color:var(--ivory-dim);font-family:var(--serif);font-style:italic}
.hero .meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);
  background:var(--ink-2);border-radius:999px;padding:8px 16px;font-size:.82rem;color:var(--ivory-dim)}
.pill b{color:var(--brass-soft)}
.hero-keys{margin-top:46px}

/* ---------- sections ---------- */
section{padding:64px 0;border-top:1px solid var(--line)}
.sec-eyebrow{font-family:var(--sans);text-transform:uppercase;letter-spacing:.28em;font-size:.72rem;
  color:var(--brass);font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:12px}
.sec-eyebrow::before{content:"";width:34px;height:1px;background:var(--brass);opacity:.6}
.lead{font-size:1.18rem;color:var(--ivory-dim);max-width:62ch}
.prose{max-width:68ch}
.prose p,.prose li{color:var(--ivory-dim)}
.prose h3{color:var(--ivory);margin-top:1.6em}
.prose ul{padding-left:1.1em}
.prose li{margin:.3em 0}

/* ---------- cards / panels ---------- */
.panel{background:linear-gradient(180deg,var(--ink-2),rgba(20,18,32,.5));
  border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.grid{display:grid;gap:20px}
.grid>*{min-width:0}
.grid.two{grid-template-columns:repeat(2,1fr)}
.grid.three{grid-template-columns:repeat(3,1fr)}
@media(max-width:820px){.grid.two,.grid.three{grid-template-columns:1fr}}

.card{background:var(--ink-2);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  transition:transform .25s ease,border-color .25s ease}
.card:hover{transform:translateY(-3px);border-color:#3a3357}
.card .num{font-family:var(--serif);font-size:2.4rem;color:var(--brass);line-height:1;opacity:.85}
.card h3{margin:.3em 0 .35em}
.card p{color:var(--muted);font-size:.97rem;margin:0}

/* concept tiles with mini keyboards */
.concept{display:grid;gap:18px}
.concept .tag{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);font-weight:600}

/* ---------- interactive keyboard ---------- */
.kbwrap{background:linear-gradient(180deg,#17141f,#0d0b12);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px 20px 16px;box-shadow:var(--shadow)}
.kbwrap .kbhead{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px}
.kbwrap .kbhead .ttl{font-weight:650;color:var(--ivory)}
.kbwrap .kbhead .sub{color:var(--muted);font-size:.86rem}
.kbtns{margin-left:auto;display:flex;gap:8px;flex-wrap:wrap}
.btn{cursor:pointer;border:1px solid var(--line);background:var(--ink-3);color:var(--ivory-dim);
  border-radius:999px;padding:7px 14px;font-size:.8rem;font-family:var(--sans);transition:.18s}
.btn:hover{border-color:var(--brass);color:var(--brass-soft)}
.btn.active{background:var(--brass);color:#1a1406;border-color:var(--brass);font-weight:600}
.piano{position:relative;display:flex;user-select:none;touch-action:manipulation;
  height:180px;border-radius:8px;overflow:hidden}
.piano .wkey{position:relative;flex:1;background:linear-gradient(180deg,#fbf7ef,#e8e1d2);
  border:1px solid #b9b1a0;border-top:none;border-radius:0 0 6px 6px;cursor:pointer;
  display:flex;align-items:flex-end;justify-content:center;padding-bottom:10px;
  transition:background .08s}
.piano .wkey:active,.piano .wkey.down{background:linear-gradient(180deg,#efe7d6,#d8cdb6)}
.piano .wkey .lbl{font-size:.72rem;color:#6a6358;font-weight:600;pointer-events:none}
.piano .wkey.hl{background:linear-gradient(180deg,var(--brass-soft),var(--brass))}
.piano .wkey.hl .lbl{color:#3a2a08}
.piano .wkey.root{background:linear-gradient(180deg,#f0b463,var(--rose))}
.piano .bkey{position:absolute;top:0;width:8.2%;height:62%;background:linear-gradient(180deg,#2a2734,#0a0910);
  border:1px solid #000;border-radius:0 0 5px 5px;z-index:3;cursor:pointer;
  box-shadow:0 4px 6px rgba(0,0,0,.5);display:flex;align-items:flex-end;justify-content:center;padding-bottom:6px}
.piano .bkey:active,.piano .bkey.down{background:linear-gradient(180deg,#1a1822,#000)}
.piano .bkey .lbl{font-size:.6rem;color:#aaa;pointer-events:none}
.piano .bkey.hl{background:linear-gradient(180deg,var(--brass),#a8761f)}
.piano .bkey.hl .lbl{color:#1a1406}
.piano .bkey.root{background:linear-gradient(180deg,var(--rose),#8c4a58)}
.finger{position:absolute;top:6px;left:50%;transform:translateX(-50%);width:19px;height:19px;
  border-radius:50%;background:var(--ink);color:var(--brass-soft);border:1px solid var(--brass);
  font-size:.68rem;display:flex;align-items:center;justify-content:center;font-weight:700;pointer-events:none}
.bkey .finger{background:var(--ivory);color:var(--ink);border-color:#fff}

/* chord-chip row */
.chipscroll{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.chip{cursor:pointer;border:1px solid var(--line);background:var(--ink-3);border-radius:10px;
  padding:10px 14px;text-align:center;min-width:78px;transition:.18s}
.chip:hover{border-color:var(--brass);transform:translateY(-2px)}
.chip .rn{font-family:var(--serif);font-size:1.3rem;color:var(--brass-soft);line-height:1}
.chip .nm{font-weight:650;font-size:.95rem;margin-top:3px}
.chip .nt{font-size:.72rem;color:var(--muted);font-family:var(--mono)}

/* ---------- circle of fifths ---------- */
.circle-wrap{display:flex;gap:32px;align-items:center;flex-wrap:wrap;justify-content:center}
#circle5{max-width:420px;width:100%}
#circle5 .seg{cursor:pointer;transition:.2s}
#circle5 .seg:hover .segbg{fill:#26213a}
#circle5 .segbg{fill:var(--ink-3);stroke:var(--line)}
#circle5 .seg.on .segbg{fill:var(--brass)}
#circle5 .seg.on text{fill:#1a1406!important}
#circle5 text{fill:var(--ivory);font-family:var(--serif);font-weight:600}
.circle-info{flex:1;min-width:240px}

/* ---------- exercise cards (checkable) ---------- */
.ex{background:var(--ink-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;position:relative;transition:.2s}
.ex.done{border-color:var(--ok);opacity:.7}
.ex .extop{display:flex;align-items:flex-start;gap:14px}
.ex .check{flex:none;width:26px;height:26px;border-radius:50%;border:2px solid var(--line);
  cursor:pointer;display:flex;align-items:center;justify-content:center;color:transparent;transition:.18s;margin-top:2px}
.ex.done .check{background:var(--ok);border-color:var(--ok);color:#0c2010}
.ex h4{color:var(--ivory);text-transform:none;letter-spacing:0;font-size:1.12rem;font-family:var(--sans);margin:0}
.ex .goal{color:var(--brass-soft);font-size:.9rem;margin:2px 0 0}
.ex ol{margin:14px 0 10px;padding-left:20px;color:var(--ivory-dim);font-size:.96rem}
.ex ol li{margin:.34em 0}
.ex .target{display:inline-flex;gap:8px;align-items:center;font-size:.82rem;color:var(--teal);
  background:rgba(111,182,166,.08);border:1px solid rgba(111,182,166,.25);border-radius:8px;padding:6px 12px}
.ex .mins{position:absolute;top:20px;right:20px;font-size:.76rem;color:var(--muted)}

/* mistakes / callouts */
.callout{border-left:3px solid var(--rose);background:rgba(201,123,138,.06);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:14px 18px;margin:14px 0}
.callout.tip{border-color:var(--teal);background:rgba(111,182,166,.06)}
.callout .ct{font-size:.74rem;text-transform:uppercase;letter-spacing:.14em;font-weight:600;margin-bottom:6px}
.callout.tip .ct{color:var(--teal)} .callout .ct{color:var(--rose)}
.callout ul{margin:0;padding-left:18px}.callout li{margin:.25em 0;color:var(--ivory-dim);font-size:.95rem}

/* quote from the lesson */
.lessonquote{font-family:var(--serif);font-style:italic;font-size:1.4rem;color:var(--ivory);
  border-left:3px solid var(--brass);padding:8px 0 8px 24px;margin:24px 0;line-height:1.4}
.lessonquote .who{display:block;font-size:.82rem;font-style:normal;font-family:var(--sans);
  color:var(--muted);letter-spacing:.1em;text-transform:uppercase;margin-top:10px}

/* ---------- roadmap timeline ---------- */
.timeline{position:relative;margin-top:20px;padding-left:30px}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--brass),var(--rose),transparent)}
.tl{position:relative;margin-bottom:28px}
.tl::before{content:"";position:absolute;left:-29px;top:5px;width:14px;height:14px;border-radius:50%;
  background:var(--ink);border:2px solid var(--brass)}
.tl .when{font-size:.74rem;text-transform:uppercase;letter-spacing:.16em;color:var(--brass);font-weight:600}
.tl h4{color:var(--ivory);text-transform:none;letter-spacing:0;font-family:var(--sans);font-size:1.15rem;margin:.2em 0 .3em}
.tl p{color:var(--muted);margin:0;font-size:.97rem}

/* schedule table */
.sched{width:100%;border-collapse:collapse;margin-top:10px}
.sched th,.sched td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);font-size:.95rem}
.sched th{color:var(--brass-soft);font-weight:600;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase}
.sched td:first-child{color:var(--ivory);font-weight:600;white-space:nowrap}
.sched td:last-child{color:var(--muted)}
.sched .min{color:var(--teal);font-family:var(--mono);font-size:.86rem}

/* sources */
.src{font-size:.88rem;color:var(--muted);border-top:1px dashed var(--line);padding-top:8px;margin-top:8px}
.src a{color:var(--ivory-dim)}

/* footer */
footer{padding:56px 0 80px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
footer .sig{font-family:var(--serif);font-size:1.5rem;color:var(--ivory);font-style:italic}
.dl{display:inline-flex;align-items:center;gap:10px;background:var(--brass);color:#1a1406;font-weight:650;
  border-radius:999px;padding:13px 24px;margin-top:8px;transition:.2s}
.dl:hover{background:var(--brass-soft);text-decoration:none;transform:translateY(-2px)}

/* misc */
.toc{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.toc a{font-size:.84rem;color:var(--ivory-dim);border:1px solid var(--line);border-radius:999px;padding:7px 15px}
.toc a:hover{border-color:var(--brass);color:var(--brass-soft);text-decoration:none}
/* fail-safe reveal: visible by default; hidden only once JS confirms it can animate */
.reveal{opacity:1;transform:none}
html.anim .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
html.anim .reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){html.anim .reveal{opacity:1!important;transform:none!important;transition:none}}
.hr{height:1px;background:var(--line);margin:8px 0 0}
::selection{background:var(--brass);color:#1a1406}

/* prose tables (markdown) */
.prose table{width:100%;border-collapse:collapse;margin:1em 0;font-size:.92rem}
.prose th,.prose td{border:1px solid var(--line);padding:8px 12px;text-align:left}
.prose th{background:var(--ink-3);color:var(--brass-soft);font-weight:600}
.prose td{color:var(--ivory-dim)}
.prose td:first-child,.prose th:first-child{white-space:nowrap}
/* expandable deep-dive */
details.deep{margin-top:14px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--ink-2)}
details.deep>summary{cursor:pointer;padding:14px 18px;font-weight:600;color:var(--brass-soft);list-style:none;font-size:.92rem;letter-spacing:.02em}
details.deep>summary::-webkit-details-marker{display:none}
details.deep>summary::before{content:"▸ ";color:var(--brass)}
details.deep[open]>summary::before{content:"▾ "}
details.deep .prose{padding:0 20px 18px;max-width:none}
.soundhint{font-size:.8rem;color:var(--muted);margin-top:10px;display:flex;align-items:center;gap:7px}
.invbtns{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.lib-line{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:10px 0;border-bottom:1px dashed var(--line)}
.lib-line .lyric{flex:1;min-width:180px;color:var(--ivory-dim);font-style:italic;font-family:var(--serif);font-size:1.1rem}
.lib-line .chords{display:flex;gap:6px}
.lib-line .c{font-family:var(--mono);font-weight:700;color:var(--brass-soft);background:var(--ink-3);border:1px solid var(--line);border-radius:6px;padding:3px 9px;font-size:.84rem}
.lib-line .rn{font-size:.7rem;color:var(--muted)}

/* ============ readability / layout pass ============ */
.sec-lead{font-family:var(--serif);font-style:italic;font-size:clamp(1.3rem,2.6vw,1.7rem);color:var(--ivory);max-width:32ch;margin:.3em 0 0;line-height:1.28}
.keycards{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin:30px 0 4px}
@media(max-width:860px){.keycards{grid-template-columns:repeat(2,1fr)}}
.keycard{background:var(--ink-2);border:1px solid var(--line);border-left:3px solid var(--brass);border-radius:11px;padding:15px 16px;font-size:.96rem;color:var(--ivory);line-height:1.4}
.keycard b{display:block;color:var(--brass-soft);font-size:.68rem;text-transform:uppercase;letter-spacing:.13em;margin-bottom:7px;font-weight:600}
.keycard .mono{color:var(--ivory)}
.cbody{max-width:760px;margin:34px auto 0}
.cbody>.prose{max-width:none}
.whycard{background:linear-gradient(180deg,rgba(111,182,166,.11),rgba(111,182,166,.03));border:1px solid rgba(111,182,166,.32);border-radius:var(--radius);padding:20px 24px;margin:26px 0}
.whycard .wh{display:flex;align-items:center;gap:9px;font-size:.74rem;text-transform:uppercase;letter-spacing:.14em;color:var(--teal);font-weight:600;margin-bottom:9px}
.whycard .prose{max-width:none}.whycard .prose p{margin:0;color:var(--ivory)}
.steps-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:30px}
@media(max-width:900px){.steps-grid{grid-template-columns:repeat(2,1fr)}}
.stepcard{background:linear-gradient(180deg,var(--ink-2),rgba(20,18,32,.4));border:1px solid var(--line);border-radius:13px;padding:18px;transition:.22s}
.stepcard:hover{border-color:#3a3357;transform:translateY(-3px)}
.stepcard .n{font-family:var(--serif);font-size:1.9rem;color:var(--brass);line-height:1;opacity:.9}
.stepcard h4{font-family:var(--sans);text-transform:none;letter-spacing:-.01em;color:var(--ivory);font-size:1.02rem;margin:9px 0 5px}
.stepcard p{color:var(--muted);font-size:.86rem;margin:0;line-height:1.45}
.exgroup{margin-top:34px}
.exgroup>h3{font-size:1.05rem;color:var(--brass-soft);font-family:var(--sans);font-weight:650;letter-spacing:.01em;display:flex;align-items:center;gap:12px;margin-bottom:16px}
.exgroup>h3::after{content:"";flex:1;height:1px;background:var(--line)}
.libchart{margin-top:26px;padding:26px}
.libchart .lib-line:first-child{padding-top:0}
.lead-tight{max-width:60ch}

/* responsive tables — scroll instead of clip on narrow screens */
.tablescroll{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%;margin:1em 0;border-radius:8px}
.tablescroll table{margin:0}
@media(max-width:680px){ .tablescroll table{min-width:430px} }

/* ============ digestibility v2: visual content components ============ */
/* big idea */
.bigidea{position:relative;max-width:30ch;margin:26px auto 6px;text-align:center}
.bigidea .lab{font-size:.66rem;letter-spacing:.22em;text-transform:uppercase;color:var(--brass);font-weight:600;margin-bottom:10px}
.bigidea p{font-family:var(--serif);font-size:clamp(1.55rem,3.2vw,2.25rem);line-height:1.22;color:var(--ivory);margin:0}
.bigidea p b,.bigidea p strong{color:var(--brass-soft)}

/* takeaway icon cards */
.takeaways{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:13px;margin:28px 0}
.tk{background:linear-gradient(180deg,var(--ink-2),rgba(20,18,32,.4));border:1px solid var(--line);border-radius:14px;
  padding:18px 16px;text-align:center;transition:.2s}
.tk:hover{border-color:#3a3357;transform:translateY(-3px)}
.tk .ico{font-size:1.9rem;line-height:1;display:block;margin-bottom:9px}
.tk .t{color:var(--ivory-dim);font-size:.96rem;line-height:1.35}

/* numbered flow stepper */
.flow{display:grid;grid-template-columns:repeat(auto-fit,minmax(168px,1fr));gap:14px;margin:28px 0}
.fstep{background:var(--ink-2);border:1px solid var(--line);border-radius:14px;padding:18px;position:relative}
.fstep .fnum{width:34px;height:34px;border-radius:50%;background:var(--brass);color:#1a1406;font-weight:700;
  font-family:var(--serif);font-size:1.15rem;display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.fstep h5{margin:0 0 5px;font-size:1rem;color:var(--ivory);font-weight:650;font-family:var(--sans)}
.fstep p{margin:0;color:var(--muted);font-size:.88rem;line-height:1.45}
.flowttl{font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);font-weight:600;margin:24px 0 -8px}

/* comparison cards */
.compare{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:stretch;margin:28px 0}
@media(max-width:640px){.compare{grid-template-columns:1fr;gap:10px}.compare .vs{display:none}}
.cmpttl{text-align:center;font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--brass);font-weight:600;margin:24px 0 0}
.cmpcard{background:var(--ink-2);border:1px solid var(--line);border-radius:14px;padding:20px}
.cmpcard h5{margin:0 0 12px;font-family:var(--serif);font-size:1.3rem;color:var(--brass-soft);font-weight:600}
.cmpcard ul{margin:0;padding-left:18px}.cmpcard li{color:var(--ivory-dim);font-size:.93rem;margin:.34em 0}
.compare .vs{align-self:center;font-family:var(--serif);font-style:italic;color:var(--muted);font-size:1.1rem;padding:0 4px}

/* remember line */
.remember{display:flex;gap:14px;align-items:center;background:linear-gradient(90deg,rgba(217,164,65,.12),transparent);
  border-left:3px solid var(--brass);border-radius:0 12px 12px 0;padding:16px 20px;margin:26px 0}
.remember .rk{font-size:1.5rem;flex:none}
.remember .rt{font-family:var(--serif);font-style:italic;font-size:1.2rem;color:var(--ivory);line-height:1.3}

/* ---- concept graphics ---- */
/* step-pattern strip (scale) */
.steppat{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px;margin:24px 0;
  background:var(--ink-2);border:1px solid var(--line);border-radius:14px;padding:20px 14px}
.steppat .pn{width:38px;height:38px;border-radius:9px;background:linear-gradient(180deg,#fbf7ef,#e8e1d2);color:#3a2a08;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.95rem;flex:none}
.steppat .pg{display:flex;flex-direction:column;align-items:center;gap:3px;color:var(--muted);font-size:.66rem;
  letter-spacing:.08em;min-width:30px}
.steppat .pg .bar{width:100%;height:2px;background:var(--line);border-radius:2px}
.steppat .pg.half{color:var(--rose);font-weight:700}
.steppat .pg.half .bar{background:var(--rose)}
.steppat .pg.half::after{content:"½ step";white-space:nowrap}
.steppat .pg:not(.half)::after{content:"whole"}

/* V -> I tension pull */
.pull{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;margin:24px 0}
@media(max-width:560px){.pull{grid-template-columns:1fr;gap:14px}.pull .arrow{transform:rotate(90deg)}}
.pullcard{border-radius:16px;padding:22px;text-align:center;border:1px solid var(--line)}
.pullcard.v{background:linear-gradient(180deg,rgba(224,114,107,.14),rgba(224,114,107,.04));border-color:rgba(224,114,107,.4)}
.pullcard.i{background:linear-gradient(180deg,rgba(121,201,139,.13),rgba(121,201,139,.04));border-color:rgba(121,201,139,.4)}
.pullcard .big{font-family:var(--serif);font-size:2.6rem;line-height:1;color:var(--ivory)}
.pullcard .rn{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-top:6px}
.pullcard .nt{font-family:var(--mono);font-size:.8rem;color:var(--ivory-dim);margin-top:8px}
.pullcard.v .tag{color:#e0726b}.pullcard.i .tag{color:#79c98b}
.pullcard .tag{font-size:.82rem;font-weight:600;margin-top:8px}
.pull .arrow{display:flex;flex-direction:column;align-items:center;color:var(--brass);font-size:1.8rem;gap:2px}
.pull .arrow .lbl{font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}

/* function flow blocks (T S D) */
.funcs{display:flex;flex-wrap:wrap;gap:8px;align-items:stretch;margin:24px 0}
.fb{flex:1;min-width:120px;border-radius:13px;padding:16px;border:1px solid var(--line);text-align:center}
.fb .fn{font-family:var(--serif);font-size:1.5rem;color:var(--ivory)}
.fb .fr{font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;margin-top:4px}
.fb .fd{font-size:.84rem;color:var(--muted);margin-top:7px;line-height:1.35}
.fb.t{background:rgba(121,201,139,.08)}.fb.t .fr{color:#79c98b}
.fb.s{background:rgba(111,182,166,.08)}.fb.s .fr{color:var(--teal)}
.fb.d{background:rgba(224,114,107,.08)}.fb.d .fr{color:#e0726b}
.fbsep{align-self:center;color:var(--muted);font-size:1.2rem}
@media(max-width:560px){.fbsep{display:none}}

/* stacked thirds */
.thirds{display:flex;align-items:center;gap:20px;justify-content:center;margin:24px 0;flex-wrap:wrap}
.stack{display:flex;flex-direction:column-reverse;gap:6px}
.stack .sn{width:120px;padding:10px 14px;border-radius:9px;background:var(--ink-3);border:1px solid var(--line);
  display:flex;justify-content:space-between;color:var(--ivory);font-weight:600}
.stack .sn .deg{color:var(--brass-soft);font-size:.78rem}
.thirds .ivl{color:var(--ivory-dim);font-size:.9rem;text-align:left;max-width:22ch}
.thirds .ivl b{color:var(--brass-soft)}