/* ==========================================================================
   QuarterZip Labs — signature diagrams & specialized blocks
   ========================================================================== */

/* ---- Architecture: four-layer stack (the signature visual) ---- */
.stack { display: flex; flex-direction: column; gap: 10px; }
.layer {
  display: grid; grid-template-columns: 64px 1fr; align-items: stretch;
  border: 1px solid var(--rule); border-radius: var(--radius); overflow: hidden;
  background: var(--paper-raised);
}
.layer__n {
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 24px; font-weight: 600; color: var(--clay);
  background: var(--sand); border-right: 1px solid var(--rule);
}
.layer__body { padding: 22px 26px; }
.layer__name { font-family: var(--serif); font-size: 21px; font-weight: 600; }
.layer__name .tag { font-family: var(--sans); font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-50); margin-left: 12px; }
.layer__job { color: var(--ink-70); font-size: 16px; margin-top: 6px; line-height: 1.5; }
.layer:nth-child(1) .layer__n { background: #F0E7DF; }
.layer:nth-child(2) .layer__n { background: #ECE6DB; }
.layer:nth-child(3) .layer__n { background: #E8E1D4; }
.layer:nth-child(4) .layer__n { background: var(--ink); color: var(--clay); border-right-color: var(--ink); }
/* stacked depth cue */
.stack--depth .layer { box-shadow: 0 1px 0 var(--rule-soft); }

/* ---- 90-day continuous timeline ---- */
.timeline { margin-top: 8px; }
.timeline__bar { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); height: 64px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--rule); }
.timeline__seg { display: flex; flex-direction: column; justify-content: center; padding: 0 22px; position: relative; }
.timeline__seg + .timeline__seg { border-left: 1px solid var(--rule); }
.timeline__seg:nth-child(1) { background: #F1E9E1; }
.timeline__seg:nth-child(2) { background: #ECE5DA; }
.timeline__seg:nth-child(3) { background: #E6DFD2; }
.timeline__phase { font-weight: 700; font-size: 14px; color: var(--ink); }
.timeline__days { font-size: 12px; color: var(--ink-50); font-weight: 600; letter-spacing: 0.04em; }
.timeline__scale { display: flex; justify-content: space-between; margin-top: 10px; font-size: 12px; font-weight: 600; color: var(--ink-50); letter-spacing: 0.04em; }
.timeline__own { display: inline-flex; align-items: center; gap: 7px; color: var(--clay); font-weight: 700; }
.timeline__own::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--clay); }

.phases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 28px; }
@media (max-width: 860px) { .phases { grid-template-columns: 1fr; } .timeline__bar { height: auto; grid-template-columns: 1fr; } .timeline__seg + .timeline__seg { border-left: 0; border-top: 1px solid var(--rule); } .timeline__seg { padding: 14px 18px; } }
.phase { border: 1px solid var(--rule); border-radius: var(--radius); padding: 24px; background: var(--paper-raised); }
.phase__k { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--clay); }
.phase h4 { font-family: var(--serif); font-size: 20px; margin: 8px 0 12px; }
.phase p { font-size: 15px; color: var(--ink-70); line-height: 1.55; }
.phase .value { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--rule-soft); font-size: 14px; color: var(--ink); }
.phase .value b { color: var(--clay); font-weight: 700; }

/* ---- Five-stage maturity rail ---- */
.rail { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border: 1px solid var(--rule); border-radius: var(--radius); overflow: hidden; }
@media (max-width: 760px) { .rail { grid-template-columns: 1fr; } }
.rail__stage { padding: 22px 20px; position: relative; background: var(--paper-raised); }
.rail__stage + .rail__stage { border-left: 1px solid var(--rule); }
@media (max-width: 760px) { .rail__stage + .rail__stage { border-left: 0; border-top: 1px solid var(--rule); } }
.rail__stage:nth-child(1){ background:#F4F1EC; } .rail__stage:nth-child(2){ background:#F1ECE4; }
.rail__stage:nth-child(3){ background:#EEE8DD; } .rail__stage:nth-child(4){ background:#EAE2D4; }
.rail__stage:nth-child(5){ background: var(--ink); }
.rail__n { font-family: var(--serif); font-size: 15px; font-weight: 600; color: var(--clay); }
.rail__label { font-weight: 700; font-size: 16px; margin-top: 8px; color: var(--ink); }
.rail__stage:nth-child(5) .rail__label { color: var(--paper); }
.rail__stage:nth-child(5) .rail__n { color: var(--clay); }

/* ---- Output gate checklist (six steps) ---- */
.gate { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 720px) { .gate { grid-template-columns: 1fr; } }
.gate__step { display: flex; align-items: center; gap: 14px; padding: 16px 18px; border: 1px solid var(--rule); border-radius: var(--radius); background: var(--paper-raised); }
.gate__num { width: 30px; height: 30px; flex: none; border-radius: 50%; border: 1.5px solid var(--clay); color: var(--clay); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 14px; font-family: var(--sans); }
.gate__label { font-weight: 600; font-size: 15px; color: var(--ink); }

/* ---- Function blocks (Before / With the OS / Proof) ---- */
.func { border: 1px solid var(--rule); border-radius: var(--radius); padding: 30px; background: var(--paper-raised); }
.func + .func { margin-top: 16px; }
.func__head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.func h3 { font-family: var(--serif); font-size: 24px; }
.func__cols { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; margin-top: 22px; }
@media (max-width: 720px) { .func__cols { grid-template-columns: 1fr; gap: 18px; } }
.func__k { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-50); margin-bottom: 9px; }
.func__k.with { color: var(--clay); }
.func__col p { font-size: 16px; color: var(--ink-70); line-height: 1.55; }
.func__proof { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--rule-soft); font-size: 15px; color: var(--ink); display: flex; gap: 10px; }
.func__proof .lbl { font-weight: 700; color: var(--clay); flex: none; }

/* ---- Accordion (objections) ---- */
.accordion { border-top: 1px solid var(--rule); }
.acc { border-bottom: 1px solid var(--rule); }
.acc__q { width: 100%; text-align: left; background: none; border: 0; cursor: pointer; padding: 22px 0; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-family: var(--serif); font-size: clamp(19px, 2.2vw, 23px); font-weight: 600; color: var(--ink); }
.acc__icon { flex: none; width: 24px; height: 24px; position: relative; }
.acc__icon::before, .acc__icon::after { content: ""; position: absolute; background: var(--clay); transition: transform .25s var(--ease); }
.acc__icon::before { top: 11px; left: 3px; width: 18px; height: 2px; }
.acc__icon::after { top: 3px; left: 11px; width: 2px; height: 18px; }
.acc[aria-expanded="true"] .acc__icon::after { transform: scaleY(0); }
.acc__a { overflow: hidden; max-height: 0; transition: max-height .3s var(--ease); }
.acc__a-inner { padding-bottom: 24px; max-width: 64ch; color: var(--ink-70); font-size: 17px; line-height: 1.6; }

/* ---- Who-handles-what table ---- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 720px) { .split { grid-template-columns: 1fr; } }
.split__col { border: 1px solid var(--rule); border-radius: var(--radius); padding: 28px; background: var(--paper-raised); }
.split__col.is-ours { background: var(--sand); }
.split__col h4 { font-family: var(--sans); font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-50); margin-bottom: 16px; }
.split__col ul { list-style: none; margin: 0; padding: 0; }
.split__col li { display: flex; gap: 11px; padding: 11px 0; border-top: 1px solid var(--rule-soft); font-size: 16px; color: var(--ink-70); line-height: 1.45; }
.split__col li:first-child { border-top: 0; }
.split__col li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--clay); margin-top: 9px; flex: none; }

/* ---- Caveat line ---- */
.caveat { font-size: 14px; color: var(--ink-50); line-height: 1.55; max-width: 70ch; }
.todo { background: var(--clay-tint); color: var(--clay-press); padding: 2px 7px; border-radius: 5px; font-size: 0.92em; font-weight: 600; }

/* ---- Booking form ---- */
.form { max-width: 540px; }
.form__row { margin-bottom: 18px; }
.form label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 7px; }
.form input, .form textarea {
  width: 100%; font-family: var(--sans); font-size: 16px; color: var(--ink);
  background: var(--paper-raised); border: 1px solid var(--rule-strong); border-radius: var(--radius-sm);
  padding: 13px 15px; transition: border-color .15s var(--ease);
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--clay); }
.form textarea { min-height: 110px; resize: vertical; }
.scheduler { border-radius: var(--radius); overflow: hidden; }
.scheduler iframe { display: block; width: 100%; height: 936px; border: 0; border-radius: var(--radius); }
@media (max-width: 600px) { .scheduler iframe { height: 1176px; } }

/* ---- Numbered architecture cards (home) ---- */
.numcards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .numcards { grid-template-columns: 1fr; } }
.numcard { border: 1px solid var(--rule); border-radius: var(--radius); padding: 26px; background: var(--paper-raised); }
.numcard__n { font-family: var(--serif); font-size: 18px; font-weight: 600; color: var(--clay); }
.numcard h4 { font-family: var(--serif); font-size: 20px; margin: 8px 0 8px; }
.numcard p { font-size: 15px; color: var(--ink-70); line-height: 1.55; }

/* ---- List with clay markers ---- */
.cl { list-style: none; margin: 0; padding: 0; }
.cl li { display: flex; gap: 13px; padding: 12px 0; border-top: 1px solid var(--rule-soft); font-size: 17px; color: var(--ink-70); line-height: 1.5; }
.cl li:first-child { border-top: 0; }
.cl li b { color: var(--ink); font-weight: 700; font-family: var(--sans); }
.cl li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--clay); margin-top: 9px; flex: none; }

.callout { background: var(--sand); border-radius: var(--radius); padding: 26px 28px; font-size: 16px; color: var(--ink-70); line-height: 1.6; }
.callout b { color: var(--ink); }

/* "In short" answer-first summary (AEO) */
.tldr { display: flex; gap: 16px; align-items: flex-start; background: var(--paper-raised); border: 1px solid var(--rule); border-left: 3px solid var(--clay); border-radius: var(--radius); padding: 20px 24px; max-width: var(--maxw-text); }
.tldr__k { font-family: var(--sans); font-size: 12px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--clay); flex: none; padding-top: 4px; }
.tldr p { margin: 0; font-size: 17px; line-height: 1.55; color: var(--ink-70); }
@media (max-width: 600px) { .tldr { flex-direction: column; gap: 8px; } }

/* ---- generic auto grid ---- */
.autogrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.autogrid--2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 820px) { .autogrid { grid-template-columns: 1fr 1fr; } .autogrid--2 { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .autogrid { grid-template-columns: 1fr; } }
.mini.mini--text p { margin-top: 0; }
.attrib { font-size: 13px; color: var(--ink-50); margin-top: 18px; }