*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:  #0a0c0d;
  --bg2: #05080a;
  --surface:  #141a1c;
  --surface-h:#1e2830;
  --border:   #2a3840;
  --border-h: #3a4c58;
  --accent:      rgba(200,230,225,0.82);
  --accent-dim:  rgba(200,230,225,0.10);
  --accent-glow: rgba(200,230,225,0.20);
  --text:    #f0f5f4;
  --text-mid:#a8bfbc;
  --text-dim:#607068;
  --text-sub:#809088;
  --serif: 'Cormorant Garamond',serif;
  --sans:  'Josefin Sans',sans-serif;
  --mono:  'JetBrains Mono',monospace;
  --r:10px; --rl:14px;
  /* cost colours */
  --free-bg:   rgba(72,160,96,0.12);
  --free-bd:   rgba(72,160,96,0.30);
  --free-tx:   #6ab87a;
  --cheap-bg:  rgba(190,140,50,0.12);
  --cheap-bd:  rgba(190,140,50,0.30);
  --cheap-tx:  #c8963c;
  --invest-bg: rgba(176,90,90,0.10);
  --invest-bd: rgba(176,90,90,0.28);
  --invest-tx: #c07878;
}

html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--text);
  min-height:100vh;
  padding:clamp(20px,5vw,40px) clamp(16px,5vw,28px) 80px;
  overflow-x:hidden;
}

.nav-sprite {
  height: 28px;        /* adjust to taste */
  width: auto;
  object-fit: contain;
  display: block;
}

#bg-canvas{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:0}
body::after{
  content:'';position:fixed;top:-200px;left:50%;
  transform:translateX(-50%);
  width:700px;height:400px;
  background:radial-gradient(ellipse,rgba(160,210,200,0.06) 0%,transparent 70%);
  pointer-events:none;z-index:0;
}
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}

.wrap{position:relative;z-index:1;max-width:720px;margin:0 auto;animation:fadein .4s cubic-bezier(.16,1,.3,1) both}
@keyframes fadein{from{opacity:0;transform:translateY(16px) scale(.97)}to{opacity:1;transform:none}}

/* ── Nav ── */
.nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:clamp(20px,5vw,36px)}
.nav-home{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;
  color:var(--text-sub);text-decoration:none;
  padding:5px 10px;border:1px solid var(--border);border-radius:var(--r);
  transition:color .2s,border-color .2s;
}
.nav-home:hover{color:var(--text-mid);border-color:var(--border-h)}
.nav-sep{color:var(--text-dim);font-size:10px;font-family:var(--mono);padding:0 2px}
.nav-days{display:flex;gap:4px;flex-wrap:wrap}
.nav-day{
  font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--text-sub);text-decoration:none;
  padding:5px 10px;border:1px solid var(--border);border-radius:var(--r);
  transition:color .2s,border-color .2s,background .2s;
}
.nav-day:hover{color:var(--text-mid);border-color:var(--border-h)}
.nav-day.active{color:var(--accent);border-color:rgba(200,230,225,0.35);background:var(--accent-dim)}

/* ── Page header ── */
.eyebrow{font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);display:block;margin-bottom:8px}
.page-title{font-family:var(--sans);font-size:clamp(26px,7vw,38px);font-weight:800;color:var(--text);line-height:1.05;margin-bottom:6px}
.page-sub{font-family:var(--mono);font-size:11px;color:var(--text-dim);margin-bottom:clamp(20px,5vw,32px)}

/* ── Stat strip (index) ── */
.stat-strip{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:8px;margin-bottom:12px}
.stat-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);padding:12px 14px}
.stat-val{font-family:var(--serif);font-size:clamp(20px,5vw,28px);font-weight:300;color:var(--text);line-height:1;margin-bottom:4px}
.stat-lbl{font-family:var(--mono);font-size:9px;letter-spacing:.15em;text-transform:uppercase;color:var(--text-dim)}
.stat-note{font-family:var(--mono);font-size:9px;color:var(--text-sub);margin-top:3px}

/* ── Section cards grid (index) ── */
.sec-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(196px,1fr));gap:10px;margin-bottom:20px}
.sec-link{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--rl);text-decoration:none;color:inherit;
  display:block;overflow:hidden;
  transition:background .2s,border-color .22s,transform .2s,box-shadow .22s;
}
.sec-link:hover{background:var(--surface-h);border-color:var(--border-h);transform:translateY(-3px);box-shadow:0 14px 36px rgba(0,0,0,.6)}
.sl-header{
  height:88px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#090d0e 0%,#111a1c 50%,#070b0c 100%);
  position:relative;overflow:hidden;
}
.sl-icon{
  width:40px;height:40px;
  background:var(--accent-glow);border:1px solid rgba(200,230,225,0.35);border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--sans);font-size:15px;font-weight:800;color:var(--accent);
  margin-bottom:7px;position:relative;z-index:1;
  transition:background .2s;
}
.sec-link:hover .sl-icon{background:var(--accent-dim)}
.sl-divider{width:28px;height:1px;background:var(--border);margin-bottom:7px;position:relative;z-index:1;transition:background .2s}
.sec-link:hover .sl-divider{background:var(--accent-glow)}
.sl-label{font-family:var(--mono);font-size:9px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--text-mid);position:relative;z-index:1;transition:color .2s}
.sec-link:hover .sl-label{color:var(--text)}
.sl-body{padding:11px 13px}
.sl-title{font-family:var(--sans);font-size:13px;font-weight:700;color:var(--text);margin-bottom:3px}
.sl-sub{font-family:var(--mono);font-size:9px;color:var(--text-dim);line-height:1.55;transition:color .2s}
.sec-link:hover .sl-sub{color:var(--text-sub)}

/* ── Info grid ── */
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:12px}
.info-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--rl);padding:14px 16px}
.info-heading{font-family:var(--mono);font-size:9px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-dim);margin-bottom:10px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.info-item{font-family:var(--mono);font-size:10px;color:var(--text-mid);line-height:1.75;display:flex;align-items:flex-start;gap:7px}
.info-item::before{content:'·';color:var(--accent);flex-shrink:0}

/* ── Exercise card / row ── */
.ex-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--rl);margin-bottom:10px;overflow:hidden;position:relative}
.ex-card::before{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);width:40%;height:1px;background:linear-gradient(90deg,transparent,rgba(200,230,225,0.18),transparent)}
.sec-label{font-family:var(--mono);font-size:9px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-dim);padding:9px 16px 7px;border-bottom:1px solid var(--border)}
.ex-row{
  display:grid;grid-template-columns:1fr auto;gap:8px 14px;
  padding:11px 16px;border-bottom:1px solid var(--border);
  border-left:2px solid transparent;
  transition:background .15s,border-left-color .15s;
  align-items:start;
}
.ex-row:last-child{border-bottom:none}
.ex-row:hover{background:var(--surface)}
/* row accent variants */
.s-free    {border-left-color:rgba(72,160,96,0.55)}
.s-cheap   {border-left-color:rgba(190,140,50,0.50)}
.s-invest  {border-left-color:rgba(176,90,90,0.45)}
.s-data    {border-left-color:rgba(72,140,180,0.45)}
.s-note    {border-left-color:rgba(100,120,110,0.35)}
.s-warn    {border-left-color:rgba(200,90,80,0.55)}

.ex-left{min-width:0}
.ex-name{font-family:var(--sans);font-size:clamp(12px,3vw,13px);font-weight:600;color:var(--text);margin-bottom:2px}
.ex-target{font-family:var(--mono);font-size:9px;letter-spacing:.05em;color:var(--text-sub);margin-bottom:4px}
.ex-note{font-family:var(--mono);font-size:10px;color:var(--text-dim);line-height:1.55;margin-top:4px}
.ex-tags{display:flex;flex-wrap:wrap;gap:3px;margin-top:5px}
.tag{
  font-family:var(--mono);font-size:8px;letter-spacing:.09em;text-transform:uppercase;
  padding:2px 7px;border-radius:4px;
  background:var(--accent-dim);color:var(--text-mid);border:1px solid rgba(200,230,225,0.13);
}
/* cost tags */
.t-free  {background:var(--free-bg);  color:var(--free-tx);  border-color:var(--free-bd)}
.t-cheap {background:var(--cheap-bg); color:var(--cheap-tx); border-color:var(--cheap-bd)}
.t-invest{background:var(--invest-bg);color:var(--invest-tx);border-color:var(--invest-bd)}
/* type tags */
.t-protocol{background:rgba(72,140,180,0.10);color:#78aac8;border-color:rgba(72,140,180,0.22)}
.t-warn    {background:rgba(200,90,80,0.10); color:#c87068;border-color:rgba(200,90,80,0.22)}
.t-defer   {background:rgba(100,100,100,0.10);color:#909090;border-color:rgba(100,100,100,0.18)}

.ex-right{text-align:right;flex-shrink:0;min-width:clamp(64px,15vw,110px)}
.ex-sets{font-family:var(--mono);font-size:clamp(10px,2.5vw,11px);color:var(--text-mid);letter-spacing:.04em;white-space:nowrap;line-height:1.55}
.ex-rest{font-family:var(--mono);font-size:9px;color:var(--text-dim);margin-top:2px}

/* ── Legend ── */
.legend{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px;padding:10px 14px;background:var(--bg2);border:1px solid var(--border);border-radius:var(--r)}
.legend-item{display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:9px;letter-spacing:.08em;color:var(--text-mid)}
.legend-dot{width:8px;height:8px;border-radius:2px;flex-shrink:0}
.ld-free  {background:var(--free-tx)}
.ld-cheap {background:var(--cheap-tx)}
.ld-invest{background:var(--invest-tx)}

/* ── Banners ── */
.banner{border-radius:var(--r);padding:11px 14px;margin-bottom:10px;font-family:var(--mono);font-size:10px;line-height:1.65}
.banner strong{font-family:var(--sans);font-weight:700;font-size:11px}
.b-warn{background:rgba(176,90,80,0.07);border:1px solid rgba(176,90,80,0.20);color:rgba(210,160,150,0.9)}
.b-tip {background:rgba(160,190,130,0.07);border:1px solid rgba(160,190,130,0.18);color:rgba(180,200,160,0.9)}
.b-info{background:rgba(72,140,180,0.06);border:1px solid rgba(72,140,180,0.18);color:rgba(140,185,210,0.9)}

/* ── Timeline ── */
.timeline{padding:0 0 4px 0;margin-bottom:10px}
.tl-item{display:grid;grid-template-columns:80px 1fr;gap:0 16px;position:relative;margin-bottom:0}
.tl-item::before{content:'';position:absolute;left:72px;top:18px;bottom:-2px;width:1px;background:var(--border)}
.tl-item:last-child::before{display:none}
.tl-time{font-family:var(--mono);font-size:9px;letter-spacing:.1em;color:var(--text-sub);padding:11px 0 0;text-align:right;white-space:nowrap}
.tl-body{padding:10px 0 18px 0;border-left:none}
.tl-node{width:7px;height:7px;border-radius:50%;background:var(--border-h);position:absolute;left:69px;top:14px;transition:background .2s}
.tl-item:hover .tl-node{background:var(--accent)}
.tl-title{font-family:var(--sans);font-size:13px;font-weight:700;color:var(--text);margin-bottom:4px}
.tl-desc{font-family:var(--mono);font-size:10px;color:var(--text-dim);line-height:1.6}

/* ── Divider ── */
.divider{height:1px;background:var(--border);margin:clamp(14px,4vw,22px) 0}

/* ── Responsive ── */
@media(max-width:500px){
  .ex-row{grid-template-columns:1fr}
  .ex-right{text-align:left;margin-top:4px}
  .info-grid{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr 1fr}
  .tl-item{grid-template-columns:60px 1fr}
  .tl-item::before{left:52px}
  .tl-node{left:49px}
}
@media(max-width:380px){
  .sec-grid{grid-template-columns:1fr 1fr}
}