/* Tailor Book — chrome. Everything reads from the lane vars so a lane pick reskins the whole book. */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--fg);
  font-family:var(--body); font-size:clamp(1rem, .95rem + .3vw, 1.0625rem); line-height:1.6;
  -webkit-font-smoothing:antialiased; min-height:100svh;
  transition:background-color .55s cubic-bezier(.16,1,.3,1), color .55s cubic-bezier(.16,1,.3,1);
}
::selection{background:var(--accent);color:var(--bg)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:var(--fg)}
img{max-width:100%;height:auto;display:block}

.shell{max-width:1060px;margin:0 auto;padding:0 clamp(18px,4vw,40px)}

/* ---------- top bar ---------- */
.top{position:sticky;top:0;z-index:40;background:color-mix(in srgb, var(--bg) 88%, transparent);backdrop-filter:blur(14px);border-bottom:1px solid color-mix(in srgb, var(--fg) 10%, transparent)}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
.brand{font-family:var(--display);font-weight:var(--dw);letter-spacing:var(--dls);font-size:1.05rem;text-decoration:none;color:var(--fg)}
.brand span{color:var(--accent)}
.dots{display:flex;gap:7px;align-items:center;padding:0 3px}
.dots i{width:7px;height:7px;border-radius:50%;background:color-mix(in srgb, var(--fg) 18%, transparent);transition:all .3s;display:block}
.dots i.on{background:var(--accent);transform:scale(1.35)}
.dots i.done{background:color-mix(in srgb, var(--accent) 55%, var(--bg))}

/* ---------- steps ---------- */
.step{display:none;padding:clamp(34px,6vw,72px) 0 140px;animation:stepIn .5s cubic-bezier(.16,1,.3,1) both}
.step.on{display:block}
@keyframes stepIn{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

.ey{display:block;font-size:.72rem;letter-spacing:.28em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:14px}
h1,h2{font-family:var(--display);font-weight:var(--dw);letter-spacing:var(--dls);line-height:1.06}
h1{font-size:clamp(2.3rem, 1.4rem + 4.6vw, 4.6rem)}
h2{font-size:clamp(1.7rem, 1.2rem + 2.6vw, 3rem);margin-bottom:10px}
.lede{color:var(--muted);max-width:56ch;margin-top:16px}
.hint{font-size:.85rem;color:var(--muted);margin-top:10px}

/* ---------- cover ---------- */
.cover{min-height:calc(100svh - 62px);display:flex;flex-direction:column;justify-content:center;padding-bottom:40px}
.cover h1 em{font-style:italic;color:var(--accent)}
.cover-meta{display:flex;gap:26px;flex-wrap:wrap;margin-top:34px;color:var(--muted);font-size:.9rem}
.cover-meta b{color:var(--fg);font-weight:600}
.start-row{margin-top:40px;display:flex;gap:14px;align-items:center;flex-wrap:wrap}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;padding:15px 30px;border-radius:var(--btn-radius,60px);
  background:var(--fg);color:var(--bg);font-weight:600;font-size:.95rem;border:1.5px solid var(--fg);
  transition:transform .25s cubic-bezier(.16,1,.3,1), background .25s, color .25s, border-color .25s;
}
.btn:hover{transform:translateY(-2px);background:var(--accent);border-color:var(--accent);color:var(--bg)}
.btn:active{transform:translateY(0) scale(.98)}
.btn.ghost{background:transparent;color:var(--fg)}
.btn.ghost:hover{background:var(--fg);color:var(--bg)}
.btn[disabled]{opacity:.45;pointer-events:none}

/* ---------- generic pick cards ---------- */
.grid{display:grid;gap:16px;margin-top:34px}
.pick{
  position:relative;text-align:left;border:1.5px solid color-mix(in srgb, var(--fg) 14%, transparent);
  border-radius:18px;padding:22px;background:color-mix(in srgb, var(--fg) 3%, var(--bg));
  transition:transform .3s cubic-bezier(.16,1,.3,1), border-color .25s, box-shadow .3s;
}
.pick:hover{transform:translateY(-3px);border-color:color-mix(in srgb, var(--fg) 34%, transparent);box-shadow:0 14px 34px -18px color-mix(in srgb, var(--fg) 35%, transparent)}
.pick[aria-pressed="true"]{border-color:var(--accent);box-shadow:0 0 0 1.5px var(--accent), 0 16px 36px -20px color-mix(in srgb, var(--accent) 55%, transparent)}
.pick[aria-pressed="true"]::after{
  content:"✓";position:absolute;top:14px;right:14px;width:26px;height:26px;border-radius:50%;
  background:var(--accent);color:var(--bg);display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:700;
}
.pick h3{font-family:var(--display);font-weight:var(--dw);letter-spacing:var(--dls);font-size:1.2rem;margin-bottom:6px}
.pick p{color:var(--muted);font-size:.9rem}
.pick .tag{display:inline-block;margin-top:12px;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:600}

/* ---------- chapter 1: lanes ---------- */
.lanes{grid-template-columns:repeat(auto-fill,minmax(min(300px,100%),1fr))}
.lane{padding:0;overflow:hidden;display:flex;flex-direction:column}
.lane-hero{
  padding:30px 24px 26px;background:var(--bg);color:var(--fg);min-height:218px;
  display:flex;flex-direction:column;justify-content:flex-end;gap:8px;position:relative;
}
.lane-hero .lh-ey{font-size:.66rem;letter-spacing:.3em;text-transform:uppercase;color:var(--accent);font-weight:600}
.lane-hero h3{font-family:var(--display);font-weight:var(--dw);letter-spacing:var(--dls);font-size:1.65rem;line-height:1.08;margin:0}
.lane-hero p{font-family:var(--body);color:var(--muted);font-size:.84rem;margin:2px 0 8px}
.lane-hero .lh-btn{
  align-self:flex-start;font-family:var(--body);font-size:.78rem;font-weight:600;padding:9px 18px;
  border-radius:var(--btn-radius,40px);background:var(--fg);color:var(--bg);
}
.lane-hero .sw{position:absolute;top:18px;right:18px;display:flex;gap:5px}
.lane-hero .sw i{width:14px;height:14px;border-radius:50%;border:1px solid color-mix(in srgb, var(--fg) 25%, transparent)}
.lane-meta{padding:13px 24px;border-top:1px solid color-mix(in srgb, var(--fg) 10%, transparent);font-size:.8rem;color:var(--muted);background:var(--bg)}
.lane-meta b{color:var(--fg);font-weight:600;font-family:var(--body)}

/* ---------- screenshot cards (chapters 2 + 3) ---------- */
.pick:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.shot{padding:0;overflow:hidden;display:flex;flex-direction:column}
.shot-img{display:block;aspect-ratio:16/10;overflow:hidden;background:color-mix(in srgb, var(--fg) 6%, var(--bg));border-bottom:1px solid color-mix(in srgb, var(--fg) 10%, transparent)}
.shot-img img{width:100%;height:100%;object-fit:cover;object-position:top;transition:transform .5s cubic-bezier(.16,1,.3,1)}
.pick:hover .shot-img img{transform:scale(1.04)}
.shot-body{display:flex;flex-direction:column;flex:1;padding:20px 22px 18px}
.shot-body p{margin-top:4px}
.shot-foot{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:auto;padding-top:14px}
.shot-foot .tag{margin-top:0}
.live{font-size:.8rem;font-weight:600;color:var(--fg);text-decoration:underline;text-underline-offset:3px;text-decoration-color:color-mix(in srgb, var(--fg) 35%, transparent);white-space:nowrap}
.live:hover{color:var(--accent);text-decoration-color:var(--accent)}
.live.sm{font-size:.72rem}
.secs{grid-template-columns:repeat(auto-fill,minmax(min(158px,100%),1fr));gap:12px;margin-top:0}
.sec-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
.sec-card .shot-img.sm{aspect-ratio:16/11}
.sec-card[aria-pressed="true"]::after{top:8px;right:8px;width:22px;height:22px;font-size:.75rem}
.sec-body{display:block;padding:11px 13px 12px}
.sec-body b{display:block;font-weight:600;font-size:.84rem;line-height:1.3}
.sec-body small{display:block;margin-top:4px;font-size:.72rem;color:var(--muted)}

/* ---------- chapter 3: sections ---------- */
.sec-group{margin-top:38px}
.sec-group h3{font-family:var(--display);font-weight:var(--dw);letter-spacing:var(--dls);font-size:1.25rem;margin-bottom:4px}
.sec-group .sg-note{font-size:.82rem;color:var(--muted);margin-bottom:14px}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  border:1.5px solid color-mix(in srgb, var(--fg) 16%, transparent);border-radius:60px;padding:10px 18px;
  font-size:.88rem;transition:all .22s;background:color-mix(in srgb, var(--fg) 3%, var(--bg));
}
.chip:hover{border-color:color-mix(in srgb, var(--fg) 40%, transparent);transform:translateY(-1px)}
.chip[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--bg);font-weight:600}
.counter{position:sticky;bottom:96px;margin-top:26px;display:inline-flex;gap:8px;align-items:center;font-size:.84rem;color:var(--muted);background:color-mix(in srgb, var(--bg) 92%, transparent);backdrop-filter:blur(8px);padding:8px 16px;border-radius:40px;border:1px solid color-mix(in srgb, var(--fg) 12%, transparent)}
.counter b{color:var(--accent)}

/* ---------- chapter 4: features ---------- */
.feats{grid-template-columns:repeat(auto-fill,minmax(min(250px,100%),1fr))}
.tiernote{
  margin-top:22px;border:1.5px solid var(--accent);border-radius:14px;padding:16px 20px;font-size:.9rem;
  background:color-mix(in srgb, var(--accent) 7%, var(--bg));display:none;
}
.tiernote.on{display:block;animation:stepIn .4s both}
.tiernote b{color:var(--accent)}

/* ---------- chapter 5: motion ---------- */
.motions{grid-template-columns:repeat(auto-fill,minmax(min(280px,100%),1fr))}
.mo-demo{height:110px;border-radius:12px;background:color-mix(in srgb, var(--fg) 6%, var(--bg));margin-bottom:16px;overflow:hidden;position:relative;display:flex;align-items:center;justify-content:center;gap:8px}
.mo-demo i{display:block;background:var(--accent);border-radius:4px}
/* calm: one soft fade */
.mo-calm i{width:64px;height:34px;animation:moFade 3.2s ease-in-out infinite}
@keyframes moFade{0%,100%{opacity:.25}50%{opacity:1}}
/* standard: staggered rise */
.mo-std i{width:26px;height:34px;animation:moRise 2.6s cubic-bezier(.16,1,.3,1) infinite}
.mo-std i:nth-child(2){animation-delay:.18s}.mo-std i:nth-child(3){animation-delay:.36s}
@keyframes moRise{0%{transform:translateY(26px);opacity:0}30%,70%{transform:none;opacity:1}100%{transform:translateY(-6px);opacity:0}}
/* cinematic: mask sweep */
.mo-cine i{width:130px;height:44px;clip-path:inset(0 100% 0 0);animation:moMask 3s cubic-bezier(.16,1,.3,1) infinite}
@keyframes moMask{0%{clip-path:inset(0 100% 0 0)}35%,75%{clip-path:inset(0 0 0 0)}100%{clip-path:inset(0 0 0 100%)}}

/* ---------- chapter 6: practicals ---------- */
.form{margin-top:34px;display:grid;gap:22px;max-width:640px}
.fld label{display:block;font-size:.82rem;font-weight:600;letter-spacing:.04em;margin-bottom:8px}
.fld label small{color:var(--muted);font-weight:400;letter-spacing:0}
.fld input,.fld select,.fld textarea{
  width:100%;padding:14px 16px;border-radius:12px;background:color-mix(in srgb, var(--fg) 4%, var(--bg));
  border:1.5px solid color-mix(in srgb, var(--fg) 16%, transparent);transition:border-color .2s, box-shadow .2s;
}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent)}
.fld-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:560px){.fld-row{grid-template-columns:1fr}}
.seg{display:flex;flex-wrap:wrap;gap:8px}
.seg .chip{font-size:.84rem}

/* ---------- review ---------- */
.review-card{
  margin-top:34px;border:1.5px solid color-mix(in srgb, var(--fg) 14%, transparent);border-radius:20px;overflow:hidden;
  background:color-mix(in srgb, var(--fg) 3%, var(--bg));
}
.rv-hero{padding:34px 28px;border-bottom:1px solid color-mix(in srgb, var(--fg) 10%, transparent)}
.rv-hero .ey{margin-bottom:8px}
.rv-hero h3{font-family:var(--display);font-weight:var(--dw);letter-spacing:var(--dls);font-size:clamp(1.6rem,1.2rem + 2vw,2.4rem);line-height:1.1}
.rv-rows{padding:10px 28px 24px}
.rv-row{display:grid;grid-template-columns:150px 1fr;gap:14px;padding:13px 0;border-bottom:1px solid color-mix(in srgb, var(--fg) 7%, transparent);font-size:.92rem}
.rv-row:last-child{border-bottom:0}
.rv-row .k{color:var(--muted);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;padding-top:2px}
.rv-row .v b{font-weight:600}
@media(max-width:560px){.rv-row{grid-template-columns:1fr;gap:2px}}
.addons{margin-top:26px}
.submit-row{margin-top:30px;display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.submit-msg{font-size:.88rem;color:var(--muted)}
.submit-msg.err{color:#c2402a;font-weight:600}

/* ---------- done ---------- */
.done-wrap{min-height:60svh;display:flex;flex-direction:column;justify-content:center}
.done-wrap .big{font-size:clamp(2rem,1.4rem + 3.4vw,3.6rem)}

/* ---------- bottom nav ---------- */
.nav{
  position:fixed;bottom:0;left:0;right:0;z-index:50;
  background:color-mix(in srgb, var(--bg) 90%, transparent);backdrop-filter:blur(14px);
  border-top:1px solid color-mix(in srgb, var(--fg) 10%, transparent);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 0}
.nav .skip{color:var(--muted);font-size:.88rem;text-decoration:underline;text-underline-offset:3px}
.nav .skip:hover{color:var(--fg)}
.nav-right{display:flex;gap:10px;align-items:center}
.nav .btn{padding:12px 26px}

/* footer note */
.foot{padding:26px 0 120px;color:var(--muted);font-size:.8rem}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}