/* whatiflab.store — exercise-book aesthetic, shared with whatiflab.ai
   ivory grid paper · ink navy · marigold highlighter · coral margin line */

:root {
  --paper: #FAF6EC;
  --paper-deep: #F3EDDD;
  --ink: #1C2B4A;
  --ink-soft: #45506B;
  --marigold: #E8A13D;
  --marigold-soft: rgba(232, 161, 61, 0.32);
  --coral: #E0654B;
  --grid-line: rgba(28, 43, 74, 0.055);
  --serif: "Fraunces", Georgia, serif;
  --sans: "Atkinson Hyperlegible", Verdana, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 34px 34px;
  line-height: 1.65;
  font-size: 1.06rem;
  overflow-x: hidden;
}

.margin-line {
  position: fixed;
  top: 0; bottom: 0;
  left: clamp(1.2rem, 4vw, 3.4rem);
  width: 2px;
  background: var(--coral);
  opacity: 0.5;
  z-index: 1;
  pointer-events: none;
}

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 clamp(1.4rem, 6vw, 3rem); }
.narrow { max-width: 780px; margin: 0 auto; padding: 0 clamp(1.4rem, 6vw, 3rem); }

/* ---------- header ---------- */
header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(250, 246, 236, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(28, 43, 74, 0.1);
}
nav {
  max-width: 1060px; margin: 0 auto;
  padding: 0.85rem clamp(1.4rem, 6vw, 3rem);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--ink); }
.brand-mark {
  display: grid; place-items: center;
  width: 2rem; height: 2rem;
  background: var(--ink); color: var(--paper);
  font-family: var(--serif); font-weight: 700; font-size: 1.25rem;
  border-radius: 50% 50% 50% 6px;
}
.brand-name { font-family: var(--serif); font-weight: 700; font-size: 1.35rem; letter-spacing: -0.01em; }
.brand-name em { font-style: italic; font-weight: 400; color: var(--coral); }
.navlinks { display: flex; gap: 1.6rem; list-style: none; align-items: center; }
.navlinks a { color: var(--ink-soft); text-decoration: none; font-weight: 700; font-size: 0.95rem; }
.navlinks a:hover { color: var(--coral); }
.navlinks a.ext::after { content: " \2197"; color: var(--marigold); }
@media (max-width: 720px) { .navlinks { display: none; } }

/* ---------- type ---------- */
.eyebrow {
  font-size: 0.82rem; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--coral);
}
h1 {
  font-family: var(--serif);
  font-size: clamp(2.3rem, 5.6vw, 3.9rem);
  font-weight: 600; line-height: 1.12; letter-spacing: -0.015em;
  margin: 1rem 0 1.3rem;
}
h2 {
  font-family: var(--serif);
  font-size: clamp(1.75rem, 3.8vw, 2.5rem);
  font-weight: 600; line-height: 1.18; letter-spacing: -0.01em;
  margin-top: 0.75rem;
}
h3 { font-family: var(--serif); font-weight: 600; font-size: 1.3rem; line-height: 1.3; }

.rule {
  width: 76px; height: 5px; margin: 1.3rem 0 1.8rem;
  background: repeating-linear-gradient(90deg, var(--marigold) 0 10px, transparent 10px 16px);
}
.hl {
  background: linear-gradient(104deg,
    transparent 0.4%, var(--marigold-soft) 2.4%,
    var(--marigold-soft) 97.6%, transparent 99.6%);
  padding: 0.05em 0.15em; box-decoration-break: clone; -webkit-box-decoration-break: clone;
}

/* ---------- buttons ---------- */
.cta-row { display: flex; flex-wrap: wrap; gap: 0.9rem; align-items: center; margin-top: 2rem; }
.btn {
  display: inline-block;
  background: var(--ink); color: var(--paper);
  font-family: var(--sans); font-weight: 700; font-size: 1rem;
  text-decoration: none;
  padding: 0.8rem 1.6rem;
  border: 2px solid var(--ink);
  border-radius: 4px 4px 4px 14px;
  box-shadow: 4px 4px 0 var(--marigold);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  cursor: pointer;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 7px 7px 0 var(--marigold); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--marigold); }
.btn.ghost { background: transparent; color: var(--ink); box-shadow: 4px 4px 0 rgba(28, 43, 74, 0.15); }
.btn.ghost:hover { box-shadow: 7px 7px 0 rgba(28, 43, 74, 0.15); }
.btn.marigold { background: var(--marigold); border-color: var(--marigold); color: var(--ink); box-shadow: 4px 4px 0 rgba(28,43,74,0.18); }
.btn.marigold:hover { box-shadow: 7px 7px 0 rgba(28,43,74,0.18); }
.btn.lg { font-size: 1.08rem; padding: 0.95rem 1.9rem; }

/* ---------- sections ---------- */
section { padding: clamp(3rem, 8vh, 5.5rem) 0; }
.deep { background: var(--paper-deep); border-top: 1px solid rgba(28,43,74,0.08); border-bottom: 1px solid rgba(28,43,74,0.08); }

/* ---------- hero ---------- */
.hero { padding: clamp(3.5rem, 9vh, 6.5rem) 0 clamp(2.5rem, 6vh, 4rem); }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(1.6rem, 4vw, 3rem); align-items: center; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } }
.lede { font-size: 1.16rem; max-width: 40rem; color: var(--ink-soft); }
.hero-meta { margin-top: 1.4rem; font-size: 0.92rem; color: var(--ink-soft); font-weight: 700; letter-spacing: 0.02em; }
.hero-meta span { color: var(--coral); }

/* price card */
.price-card {
  background: var(--ink); color: var(--paper);
  border-radius: 10px 10px 10px 34px;
  padding: clamp(1.6rem, 3vw, 2.2rem);
  box-shadow: 8px 8px 0 var(--marigold-soft);
}
.price-card .tag {
  display: inline-block; font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--marigold); color: var(--ink);
  padding: 0.28rem 0.7rem; border-radius: 3px; margin-bottom: 1rem;
}
.price-line { display: flex; align-items: baseline; gap: 0.7rem; flex-wrap: wrap; }
.price { font-family: var(--serif); font-weight: 700; font-size: clamp(2.6rem, 6vw, 3.4rem); line-height: 1; color: var(--ink); }
.price-was { font-family: var(--serif); font-size: 1.4rem; color: rgba(250,246,236,0.55); text-decoration: line-through; }
.price-sub { color: rgba(250,246,236,0.82); font-size: 0.95rem; margin-top: 0.5rem; }
.price-card .btn { margin-top: 1.3rem; width: 100%; text-align: center; background: var(--marigold); border-color: var(--marigold); color: var(--ink); box-shadow: 4px 4px 0 rgba(250,246,236,0.25); }
.price-card .btn:hover { box-shadow: 7px 7px 0 rgba(250,246,236,0.25); }
.price-card .microcopy { font-size: 0.82rem; color: rgba(250,246,236,0.62); margin-top: 0.9rem; text-align: center; }

/* ---------- see inside reader ---------- */
.reader {
  margin-top: 1.9rem;
  border: 1.5px solid rgba(28,43,74,0.2);
  border-radius: 8px 8px 8px 24px;
  background: #fff;
  overflow: hidden;
  box-shadow: 6px 6px 0 rgba(28,43,74,0.07);
}
.reader-bar {
  display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
  padding: 0.7rem 0.8rem;
  background: var(--paper-deep);
  border-bottom: 1.5px solid rgba(28,43,74,0.14);
}
.rtab {
  font-family: var(--sans); font-weight: 700; font-size: 0.86rem;
  color: var(--ink-soft); background: transparent;
  border: 1.5px solid transparent; border-radius: 5px;
  padding: 0.42rem 0.8rem; cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.rtab:hover { color: var(--ink); }
.rtab.active { background: var(--ink); color: var(--paper); }
.reader-hint { margin-left: auto; font-size: 0.8rem; color: var(--ink-soft); font-weight: 700; letter-spacing: 0.04em; padding-right: 0.3rem; }
.reader-hint b { color: var(--coral); }

.reader-stage { height: clamp(420px, 62vh, 640px); overflow-y: auto; background: #EDE7D8; padding: clamp(1rem, 3vw, 2rem); }
.reader-stage::-webkit-scrollbar { width: 12px; }
.reader-stage::-webkit-scrollbar-thumb { background: rgba(28,43,74,0.25); border-radius: 6px; border: 3px solid #EDE7D8; }

/* the document page */
.doc-page {
  position: relative;
  max-width: 720px; margin: 0 auto;
  background: #FFFDF6;
  border: 1px solid rgba(28,43,74,0.12);
  box-shadow: 0 10px 30px rgba(28,43,74,0.14);
  padding: clamp(1.6rem, 4vw, 3rem) clamp(1.4rem, 4vw, 3.2rem);
}
.doc-page.hidden { display: none; }
.doc-page::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='330' height='200'><text x='165' y='105' font-family='Verdana' font-size='16' fill='%231C2B4A' fill-opacity='0.05' text-anchor='middle' transform='rotate(-27 165 105)'>PREVIEW whatiflab.store</text></svg>");
  background-repeat: repeat;
}
.doc-head { border-bottom: 2px solid var(--ink); padding-bottom: 0.9rem; margin-bottom: 1.3rem; }
.doc-kicker { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase; color: var(--coral); }
.doc-title { font-family: var(--serif); font-weight: 700; font-size: clamp(1.7rem, 4vw, 2.3rem); line-height: 1.1; margin: 0.4rem 0 0.3rem; }
.doc-sub { font-style: italic; color: var(--ink-soft); font-size: 0.98rem; }
.doc-page p { margin: 0 0 0.95rem; font-size: 0.98rem; }
.doc-h { font-family: var(--serif); font-weight: 600; font-size: 1.22rem; margin: 1.5rem 0 0.7rem; color: var(--ink); }
.doc-callout {
  background: rgba(232,161,61,0.14); border-left: 4px solid var(--marigold);
  border-radius: 0 6px 6px 0; padding: 0.9rem 1.1rem; margin: 1.1rem 0; font-size: 0.95rem;
}
.doc-page ol, .doc-page ul { margin: 0 0 1rem 1.3rem; }
.doc-page li { margin-bottom: 0.55rem; font-size: 0.97rem; }
.doc-table { width: 100%; border-collapse: collapse; margin: 0.6rem 0 1.2rem; font-size: 0.9rem; }
.doc-table th { text-align: left; background: var(--ink); color: var(--paper); font-weight: 700; padding: 0.5rem 0.65rem; }
.doc-table td { border: 1px solid rgba(28,43,74,0.18); padding: 0.5rem 0.65rem; vertical-align: top; color: var(--ink-soft); }
.doc-sig { margin-top: 1.6rem; padding-top: 1rem; border-top: 1px dashed rgba(28,43,74,0.4); font-weight: 700; color: var(--ink-soft); font-size: 0.92rem; }
.doc-fine { margin-top: 1.4rem; font-size: 0.78rem; color: var(--ink-soft); }
.ph { background: var(--marigold-soft); border-radius: 3px; padding: 0 0.2em; font-weight: 700; }

/* locked documents */
.locked-head { margin: 2.2rem 0 1.1rem; font-family: var(--serif); font-size: 1.15rem; font-weight: 600; }
.locked-head b { color: var(--coral); }
.locked-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
@media (max-width: 820px) { .locked-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .locked-grid { grid-template-columns: 1fr; } }
.locked-card {
  position: relative; overflow: hidden;
  background: #FFFDF6; border: 1.5px solid rgba(28,43,74,0.16);
  border-radius: 6px 6px 6px 18px; padding: 1.1rem 1.2rem 1.2rem; min-height: 168px;
}
.locked-card .lk-lines { position: absolute; inset: 3.4rem 1.2rem 1rem; filter: blur(3px); opacity: 0.5; }
.locked-card .lk-lines span { display: block; height: 8px; background: rgba(28,43,74,0.3); border-radius: 4px; margin-bottom: 8px; }
.locked-card .lk-lines span:nth-child(2){ width: 92%; } .locked-card .lk-lines span:nth-child(3){ width: 80%; }
.locked-card .lk-lines span:nth-child(4){ width: 88%; } .locked-card .lk-lines span:nth-child(5){ width: 64%; }
.lk-num { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; color: var(--coral); text-transform: uppercase; }
.lk-name { font-family: var(--serif); font-weight: 600; font-size: 1.05rem; margin: 0.15rem 0 0.4rem; position: relative; }
.lk-desc { font-size: 0.86rem; color: var(--ink-soft); position: relative; }
.lk-badge {
  position: absolute; right: 0.8rem; bottom: 0.8rem;
  display: inline-flex; align-items: center; gap: 0.35rem;
  background: var(--ink); color: var(--paper);
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em;
  padding: 0.28rem 0.6rem; border-radius: 3px;
}

/* ---------- included list ---------- */
.inc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem 2rem; margin-top: 1.6rem; }
@media (max-width: 720px) { .inc-grid { grid-template-columns: 1fr; } }
.inc-item { display: flex; gap: 0.75rem; align-items: flex-start; padding: 0.5rem 0; border-bottom: 1px solid rgba(28,43,74,0.09); }
.inc-check { flex: 0 0 auto; width: 1.5rem; height: 1.5rem; margin-top: 0.15rem; display: grid; place-items: center; background: var(--marigold); color: var(--ink); border-radius: 50% 50% 50% 4px; font-weight: 700; font-size: 0.85rem; }
.inc-item h4 { font-family: var(--serif); font-weight: 600; font-size: 1.02rem; }
.inc-item p { font-size: 0.9rem; color: var(--ink-soft); margin-top: 0.1rem; }

/* ---------- pricing ---------- */
.buy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.3rem; margin-top: 1.8rem; align-items: stretch; }
@media (max-width: 900px) { .buy-grid { grid-template-columns: 1fr; } }
.buy-card { display: flex; flex-direction: column; background: #FFFDF6; border: 1.5px solid rgba(28,43,74,0.18); border-radius: 8px 8px 8px 24px; padding: 1.6rem 1.6rem 1.5rem; box-shadow: 5px 5px 0 rgba(28,43,74,0.07); }
.buy-card.hero { background: var(--ink); color: var(--paper); border: none; box-shadow: 8px 8px 0 var(--marigold-soft); }
.price-card .price, .buy-card.hero .bc-name, .buy-card.hero .price { color: #fff; }
.buy-card.hero .bc-desc, .buy-card.hero .bc-list li { color: rgba(250,246,236,0.85); }
.bc-flag { align-self: flex-start; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; background: var(--marigold); color: var(--ink); padding: 0.26rem 0.6rem; border-radius: 3px; margin-bottom: 0.9rem; }
.bc-name { font-family: var(--serif); font-weight: 600; font-size: 1.3rem; margin-bottom: 0.5rem; }
.bc-desc { font-size: 0.92rem; color: var(--ink-soft); margin-bottom: 1rem; }
.bc-price { display: flex; align-items: baseline; gap: 0.5rem; margin: 0.2rem 0 0.3rem; }
.bc-list { list-style: none; margin: 1rem 0 1.3rem; padding: 0; }
.bc-list li { font-size: 0.9rem; color: var(--ink-soft); padding-left: 1.3rem; position: relative; margin-bottom: 0.4rem; }
.bc-list li::before { content: "\2713"; position: absolute; left: 0; color: var(--marigold); font-weight: 700; }
.buy-card .btn { margin-top: auto; text-align: center; }
.buy-card.hero .btn { background: var(--marigold); border-color: var(--marigold); color: var(--ink); box-shadow: 4px 4px 0 rgba(250,246,236,0.22); }

/* ---------- faq ---------- */
.faq { max-width: 780px; margin: 1.6rem auto 0; }
.faq details { border-bottom: 1px solid rgba(28,43,74,0.14); padding: 0.3rem 0; }
.faq summary { cursor: pointer; font-family: var(--serif); font-weight: 600; font-size: 1.1rem; padding: 0.9rem 0.2rem; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--coral); font-size: 1.5rem; font-family: var(--sans); }
.faq details[open] summary::after { content: "\2013"; }
.faq details p { padding: 0 0.2rem 1rem; color: var(--ink-soft); font-size: 0.98rem; }

/* ---------- aside / contact ---------- */
.aside-note { margin-top: 1.4rem; color: var(--ink-soft); }
.aside-note a { color: var(--coral); font-weight: 700; }

/* ---------- footer ---------- */
footer { background: var(--ink); color: rgba(250, 246, 236, 0.8); padding: 2.6rem 0; }
.foot-inner { max-width: 1060px; margin: 0 auto; padding: 0 clamp(1.4rem, 6vw, 3rem); }
.foot-brand { font-family: var(--serif); font-weight: 700; font-size: 1.4rem; color: var(--paper); margin-bottom: 0.5rem; }
.foot-brand em { font-style: italic; font-weight: 400; color: var(--marigold); }
footer a { color: rgba(250, 246, 236, 0.8); }
.foot-line { margin-top: 0.6rem; font-style: italic; color: var(--marigold); font-family: var(--serif); }

/* ---------- reveal ---------- */
.rv { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.rv.in { opacity: 1; transform: none; }
.rv.d1 { transition-delay: 0.1s; } .rv.d2 { transition-delay: 0.2s; } .rv.d3 { transition-delay: 0.3s; }
@media (prefers-reduced-motion: reduce) {
  .rv { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Rand price + notes ---------- */
.price .zar { font-size: inherit; font-weight: inherit; color: inherit; }
.price-note { font-size: 0.82rem; color: rgba(250, 246, 236, 0.7); margin: 0.3rem 0 0; }
.bc-note { font-size: 0.8rem; color: var(--ink-soft); margin: 0.2rem 0 0; }
.buy-card.hero .bc-note { color: rgba(250, 246, 236, 0.72); }
.bc-flag.light { background: transparent; border: 1.5px solid var(--marigold); color: var(--coral); }

/* ---------- the thinking / research ---------- */
.prose p { margin-bottom: 1.05rem; max-width: 46rem; color: var(--ink-soft); }
.prose p:last-child { margin-bottom: 0; }