/* MT Notebooks - mtnotebooks.com. Tokens first; dark mode follows the visitor's system setting. */
:root{
  --paper:#F6F2EA;--card:#FFFDF8;--ink:#1F1B16;--ink2:#4F473E;--muted:#7D7266;--line:#E3DACB;
  --accent:#A3432A;--accent-ink:#FFFFFF;--accent-soft:#F4E2DA;--focus:#1F6FD1;--shadow:0 1px 2px rgba(40,28,16,.08),0 10px 30px rgba(40,28,16,.10);
  --serif:'Fraunces',Georgia,'Times New Roman',serif;--sans:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;--r:14px;
}
@media (prefers-color-scheme:dark){:root{
  --paper:#15130F;--card:#1F1C17;--ink:#F3EDE3;--ink2:#D4CABC;--muted:#A3988A;--line:#38322A;
  --accent:#E5835F;--accent-ink:#1A0F0A;--accent-soft:#3A2419;--focus:#7FB2FF;--shadow:0 1px 2px rgba(0,0,0,.4),0 12px 34px rgba(0,0,0,.45);
}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 var(--sans);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}
h1,h2{font-family:var(--serif);font-weight:600;letter-spacing:-.01em;line-height:1.1}
h2{font-size:clamp(26px,3.4vw,34px);margin:0 0 14px}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--card);padding:8px 12px;border-radius:8px;z-index:50}
.skip:focus{left:12px}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border:0;border-radius:999px;background:var(--accent);color:var(--accent-ink);font:600 15px var(--sans);text-decoration:none;cursor:pointer;transition:transform .15s,filter .15s}
.btn:hover{filter:brightness(1.07)}.btn:active{transform:scale(.98)}
.btn[disabled]{opacity:.45;cursor:not-allowed;filter:none}
.ghost{display:inline-flex;align-items:center;min-height:46px;padding:0 6px;font-weight:500;color:var(--ink2)}

/* header */
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:18px;padding:12px max(16px,calc((100vw - 1180px)/2));background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:600 19px var(--serif)}
@media (prefers-color-scheme:dark){.brand img{filter:invert(1)}}
.top nav{display:flex;gap:18px;margin-left:auto}
.top nav a{color:var(--ink2);text-decoration:none;font-size:14.5px;font-weight:500}
.top nav a:hover{color:var(--ink)}
.bagbtn{display:inline-flex;align-items:center;gap:8px;min-height:42px;padding:0 16px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--ink);font:600 14.5px var(--sans);cursor:pointer}
.bagbtn .count{min-width:22px;height:22px;padding:0 6px;border-radius:999px;background:var(--accent);color:var(--accent-ink);font-size:12px;display:inline-grid;place-items:center}
.bagbtn .count.zero{background:var(--line);color:var(--muted)}

main{max-width:1180px;margin:0 auto;padding:0 16px}

/* hero */
.hero{display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:40px;padding:56px 0 40px}
.eyebrow{margin:0 0 10px;font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.hero h1{font-size:clamp(40px,6vw,68px);margin:0 0 16px}
.lede{font-size:18px;color:var(--ink2);max-width:540px;margin:0 0 24px}
.cta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin:0}
.from{color:var(--muted);font-size:14px}
.fan{position:relative;height:380px}
.fan img{position:absolute;top:20px;left:50%;width:210px;border-radius:4px 10px 10px 4px;box-shadow:var(--shadow)}
.fan .f0{transform:translateX(-110%) rotate(-9deg)}.fan .f1{transform:translateX(-50%) translateY(-14px);z-index:2}.fan .f2{transform:translateX(10%) rotate(8deg)}

/* builder */
.builder{display:grid;grid-template-columns:minmax(300px,420px) 1fr;gap:40px;align-items:start;padding:24px 0 40px;border-top:1px solid var(--line)}
.stage{position:sticky;top:84px}
.scene{position:relative;height:440px;display:flex;align-items:center;justify-content:center}
.book{position:relative;width:260px;z-index:2;transition:transform .35s ease}
.book img{width:100%;border-radius:3px 10px 10px 3px;box-shadow:var(--shadow);transition:opacity .25s}
.book::before{content:"";position:absolute;inset:0 auto 0 0;width:14px;border-radius:3px 0 0 3px;background:linear-gradient(90deg,rgba(0,0,0,.28),rgba(255,255,255,.12) 45%,rgba(0,0,0,.08));z-index:1;pointer-events:none}
.book.hardcover{transform:translateX(-34px)}
.book.hardcover img{border-radius:3px 8px 8px 3px;outline:3px solid rgba(0,0,0,.18);outline-offset:-1px}
.book.paperback{transform:translateX(-34px) scale(.97)}
.sheet{position:absolute;right:0;top:50%;width:200px;transform:translate(0,-46%) rotate(4deg);background:#fff;border-radius:3px;box-shadow:var(--shadow);transition:opacity .25s,transform .35s;overflow:hidden}
.sheet img{width:100%}
.sheet.hide{opacity:0;transform:translate(-30px,-46%) rotate(0)}
.swap{opacity:.25}
.summary{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;margin-top:14px}
.sum-name{font:600 22px/1.2 var(--serif);margin:0 0 4px}
.sum-spec{margin:0;color:var(--ink2);font-size:14.5px}
.sum-price{margin:10px 0 0;font:600 20px var(--sans)}.sum-price small{font:400 12.5px var(--sans);color:var(--muted)}
.sum-msg{margin:6px 0 0;font-size:13.5px;color:var(--accent);min-height:1em}
.sum-actions{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center;margin-top:12px}

.steps{display:grid;gap:34px}
.step{border:0;margin:0;padding:0;min-width:0}
.step legend{display:flex;align-items:center;gap:12px;padding:0;margin-bottom:14px;font:600 24px var(--serif)}
.step .n{width:32px;height:32px;border-radius:50%;display:inline-grid;place-items:center;background:var(--ink);color:var(--paper);font:600 15px var(--sans)}
.hint{color:var(--muted);font-size:14px;margin:-6px 0 14px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.chip{min-height:38px;padding:0 16px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--ink2);font:500 14px var(--sans);cursor:pointer}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}

/* radio cards: the input stays in the tab order (visually hidden), the label is the target */
.tile input,.opt input{position:absolute;opacity:0;width:1px;height:1px}
.covers{display:grid;grid-template-columns:repeat(auto-fill,minmax(104px,1fr));gap:10px}
.tile{position:relative;display:block;cursor:pointer;border-radius:10px;padding:6px;border:2px solid transparent;transition:border-color .15s,background .15s}
.tile img{width:100%;aspect-ratio:360/531;object-fit:cover;border-radius:3px 7px 7px 3px;box-shadow:0 1px 2px rgba(0,0,0,.12),0 4px 12px rgba(0,0,0,.10);transition:transform .2s}
.tile:hover img{transform:translateY(-3px)}
.tn{display:block;margin-top:7px;font-weight:600;font-size:13px;line-height:1.25}
.tp{display:block;color:var(--muted);font-size:12px}
.tile:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.tile:has(input:focus-visible){outline:3px solid var(--focus);outline-offset:2px}
.tile[hidden]{display:none}

.opts{display:grid;gap:12px}
.opts.pages{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.opts.sizes{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.opt.size{align-items:center}
/* A small to-scale outline of the page with its measurements, so the size reads at a glance */
.sz{flex:0 0 auto;position:relative;width:calc(var(--w) * 8px);height:calc(var(--h) * 8px);margin:2px 22px 14px 0;border:2px solid var(--ink2);border-radius:2px 5px 5px 2px;background:var(--card)}
.sz i{position:absolute;font:600 11px var(--sans);font-style:normal;color:var(--ink2);white-space:nowrap}
.sz i:first-child{left:50%;bottom:-17px;transform:translateX(-50%)}
.sz i:last-child{left:calc(100% + 5px);top:50%;transform:translateY(-50%)}
.opts.binds{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.opt{position:relative;display:flex;gap:14px;align-items:flex-start;padding:14px;border:2px solid var(--line);border-radius:var(--r);background:var(--card);cursor:pointer;transition:border-color .15s,background .15s}
.opt:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}
.opt:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.opt:has(input:focus-visible){outline:3px solid var(--focus);outline-offset:2px}
.opt:has(input:disabled){opacity:.5;cursor:not-allowed;border-style:dashed}
.opt .ot{display:flex;flex-direction:column;gap:3px;min-width:0}
.opt b{font-size:15.5px}.opt small{color:var(--ink2);font-size:13.5px;line-height:1.45}
.opt .na{font-style:normal;font-size:12.5px;color:var(--accent);font-weight:600}
.opt .na:empty{display:none}
.pv{flex:0 0 auto;display:flex;gap:2px;background:#fff;border:1px solid var(--line);border-radius:4px;padding:3px}
.pv img{width:58px;height:86px;object-fit:cover}
.pv.spread img{width:44px;height:65px}
.pr{float:right;font-weight:600;color:var(--ink)}
.bind b{display:block}

/* how, about, all */
.how,.about,.all{padding:44px 0;border-top:1px solid var(--line)}
.how ol{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;counter-reset:s}
.how li{counter-increment:s;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;color:var(--ink2)}
.how li::before{content:counter(s);display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-weight:700;margin-bottom:10px}
.how b{display:block;color:var(--ink);margin-bottom:4px}
.about p{max-width:720px;font-size:17px;color:var(--ink2)}
.alllist{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:10px}
.alllist li{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.alllist .tp{display:inline;margin-left:4px}
.alllist .links{display:flex;flex-wrap:wrap;gap:4px 12px;margin-top:6px;font-size:13.5px}
.foot{max-width:1180px;margin:0 auto;padding:30px 16px 110px;border-top:1px solid var(--line);color:var(--muted);font-size:13.5px}
.foot a{color:var(--ink2)}

/* bag drawer */
.bag{margin:0 0 0 auto;height:100dvh;max-height:none;width:min(440px,100vw);border:0;border-left:1px solid var(--line);padding:0;background:var(--paper);color:var(--ink)}
.bag::backdrop{background:rgba(20,14,8,.45)}
.bag[open]{animation:slide .25s ease-out}
@keyframes slide{from{transform:translateX(40px);opacity:0}to{transform:none;opacity:1}}
.bag-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}
.bag-head h2{margin:0;font-size:24px}
.x{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:var(--ink);font-size:22px;cursor:pointer}
#bagBody{padding:16px 20px 24px}
.empty{color:var(--muted);text-align:center;padding:40px 10px}
.line{display:grid;grid-template-columns:56px 1fr auto;gap:12px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.line img{width:56px;border-radius:2px 5px 5px 2px;box-shadow:0 1px 4px rgba(0,0,0,.18)}
.line b{display:block;font-size:14.5px}.line small{color:var(--muted);font-size:12.5px}
.qty{display:flex;align-items:center;gap:4px}
.qty button{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:var(--ink);font-size:17px;cursor:pointer}
.qty span{min-width:22px;text-align:center;font-weight:600}
.dp{font-size:12.5px;font-weight:600;margin-right:10px}
.rm{background:none;border:0;padding:4px 0;color:var(--muted);font-size:12.5px;text-decoration:underline;cursor:pointer}
.tot{display:flex;justify-content:space-between;margin:16px 0 4px;font-weight:600;font-size:17px}
.note{color:var(--muted);font-size:13px;margin:0 0 16px}
.bag .btn{width:100%}
.sent b{color:var(--accent)}
.sent{background:var(--accent-soft);border-radius:12px;padding:12px 14px;margin:14px 0 0;font-size:14px}

.toast{position:fixed;left:50%;bottom:90px;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--ink);color:var(--paper);padding:10px 16px;border-radius:999px;font-size:14px;transition:.25s;z-index:40;max-width:calc(100vw - 32px)}
.toast.show{opacity:1;transform:translate(-50%,0)}
.bar{display:none}

@media (max-width:900px){
  .hero{grid-template-columns:1fr;padding:32px 0 20px;gap:10px}
  .fan{height:260px}.fan img{width:150px}
  .builder{grid-template-columns:1fr;gap:20px}
  .stage{position:static}
  .scene{height:330px}.book{width:190px}.sheet{width:150px;right:6%}
  .how ol{grid-template-columns:1fr}
  .top nav{display:none}
  .bagbtn{margin-left:auto}
  .bar{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:var(--card);border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(0,0,0,.08)}
  .bar img{width:30px;border-radius:2px 4px 4px 2px;flex:0 0 auto}
  .bar span{flex:1 1 auto;font-size:13.5px;color:var(--ink2);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .bar .btn{min-height:42px;flex:0 0 auto}
  .toast{bottom:84px}
}
@media (max-width:420px){.covers{grid-template-columns:repeat(3,1fr);gap:6px}.tile{padding:4px}.tp{display:none}.fan{height:220px}.fan img{width:128px}.alllist{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}