/* 52xSeven preview: one shared stylesheet, mobile-first, no external fonts or assets. */

:root {
  --ink: #16213e;
  --ink-soft: #4a5572;
  --bg: #fffaf3;
  --card: #ffffff;
  --line: #ece4d6;
  /* Brand green. #22C55E is a fill colour: pair it with --ink text (about 7:1).
     White on #22C55E is only about 2.3:1, so green text uses --green-text (about 5:1 on white). */
  --green: #22c55e;
  --green-hover: #16a34a;
  --green-text: #15803d;
  --green-ink: #14532d;
  --green-soft: #dcfce7;
  --warn-soft: #fee2e2;
  --warn-ink: #991b1b;
  --sun: #ffc94a;
  --sun-soft: #fff1cc;
  --radius: 18px;
  --shadow: 0 6px 24px rgba(22, 33, 62, 0.08);
  --max: 1080px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}

img, svg { max-width: 100%; display: block; }

a { color: var(--green-text); }

h1, h2, h3 { line-height: 1.15; margin: 0 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 7vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 5vw, 2.2rem); }
h3, .h3 { font-size: 1.25rem; }
.product-hero .h3 { margin-top: 1.2em; }
p { margin: 0 0 1em; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; background: var(--ink); color: #fff; padding: 8px 12px; border-radius: 8px; z-index: 10; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; padding-top: 14px; padding-bottom: 14px; }
.logo { display: flex; align-items: center; text-decoration: none; }
.logo img { height: 44px; width: auto; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.nav a { color: var(--ink-soft); text-decoration: none; font-weight: 600; font-size: 0.98rem; padding: 6px 0; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-decoration-color: var(--green); text-decoration-thickness: 3px; text-underline-offset: 6px; }

/* Preview banner */
.preview-bar { background: var(--ink); color: #fff; text-align: center; font-size: 0.85rem; padding: 6px 12px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 12px 22px; border-radius: 999px; font-weight: 700; text-decoration: none; border: 2px solid transparent; cursor: pointer; font-size: 1rem; }
.btn-primary { background: var(--green); color: var(--ink); }
.btn-primary:hover { background: var(--green-hover); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: #fff; }
.btn-buy { background: var(--green); color: var(--ink); width: 100%; flex-direction: column; gap: 0; line-height: 1.2; }
.btn-buy:hover { background: var(--green-hover); }
.btn:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }
.todo-tag { display: block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; opacity: 0.9; }

/* Sections */
section { padding: 56px 0; }
.section-head { max-width: 640px; margin-bottom: 28px; }
.kicker { display: inline-block; font-weight: 800; font-size: 0.82rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--green-text); margin-bottom: 8px; }
.lead { font-size: 1.2rem; color: var(--ink-soft); }
.alt { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* Hero */
.hero { padding: 48px 0 56px; }
.hero .wrap { display: grid; gap: 36px; align-items: center; }
.hero h1 span { color: var(--green-text); }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 16px; }
.ai-chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; font-size: 0.9rem; color: var(--ink-soft); }
.ai-chips li { background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; }
.hero-art { max-width: 440px; margin: 0 auto; width: 100%; }

/* Steps */
.steps { display: grid; gap: 18px; counter-reset: step; padding: 0; margin: 0; list-style: none; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); position: relative; }
.step-num { position: absolute; top: 16px; right: 18px; font-weight: 900; font-size: 2.4rem; color: var(--line); line-height: 1; }
.step-icon { width: 72px; height: 72px; border-radius: 20px; display: grid; place-items: center; margin-bottom: 14px; }
.step:nth-child(1) .step-icon { background: var(--sun-soft); }
.step:nth-child(2) .step-icon { background: var(--green-soft); }
.step:nth-child(3) .step-icon { background: #e6ebf5; }
.step p { color: var(--ink-soft); margin: 0; }

/* Product cards */
.cards { display: grid; gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; display: flex; flex-direction: column; }
.card-body { padding: 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-body p { color: var(--ink-soft); margin: 0; }
.card-foot { display: flex; flex-direction: column; gap: 10px; margin-top: auto; padding-top: 8px; }
.card-foot .more { font-weight: 700; text-align: center; }
.price { font-size: 1.6rem; font-weight: 900; }
.price small { font-size: 0.9rem; font-weight: 600; color: var(--ink-soft); }

.cover { aspect-ratio: 16 / 7; display: grid; place-items: center; padding: 20px; color: #fff; text-align: center; }
.cover-title { font-weight: 900; font-size: 1.5rem; line-height: 1.1; }
.cover-sub { font-size: 0.85rem; font-weight: 600; opacity: 0.9; margin-top: 6px; }
.cover-mlf { background: var(--green); color: var(--ink); }
.cover-iz { background: var(--green-soft); color: var(--green-ink); }
.cover-bcf { background: var(--ink); color: #fff; }
.cover-suits { font-size: 1.6rem; letter-spacing: 0.25em; margin-bottom: 8px; line-height: 1; }
.cover-suits .g { color: var(--green); }
.cover-soon { background: repeating-linear-gradient(45deg, #f4eee3, #f4eee3 12px, #efe7d8 12px, #efe7d8 24px); color: var(--ink-soft); }
.card.soon { box-shadow: none; border-style: dashed; }
.badge { display: inline-block; align-self: flex-start; font-size: 0.75rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.06em; padding: 3px 10px; border-radius: 999px; background: var(--sun-soft); color: #7a5600; }
.badge.green { background: var(--green-soft); color: var(--green-ink); }
.badge.ink { background: #e6ebf5; color: var(--ink); }

/* FAQ */
.faq { display: grid; gap: 12px; max-width: 760px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; }
.faq summary { cursor: pointer; font-weight: 700; padding: 14px 0; list-style: none; position: relative; padding-right: 28px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 10px; font-size: 1.4rem; color: var(--green-text); }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--ink-soft); }

/* Newsletter */
.signup { background: var(--ink); color: #fff; border-radius: var(--radius); padding: 32px 24px; }
.signup p { color: #c9d0e3; }
.signup .accent { color: var(--green); }
.signup form { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
.signup label { font-weight: 700; }
.signup input { min-height: 48px; border-radius: 999px; border: 0; padding: 0 18px; font-size: 1rem; width: 100%; }
.signup .note { font-size: 0.85rem; margin: 6px 0 0; }

/* Product page */
.product-hero .wrap { display: grid; gap: 28px; align-items: start; }
.product-hero .cover { border-radius: var(--radius); box-shadow: var(--shadow); aspect-ratio: 3 / 4; max-width: 200px; width: 100%; margin: 0 auto; }
@media (max-width: 479px) {
  .sample { font-size: 0.8rem; }
  .sample th, .sample td { padding: 7px 3px; }
  .sample th { font-size: 0.68rem; letter-spacing: 0.02em; }
  .flag { font-size: 0.66rem; padding: 2px 6px; }
  .sample .opt { display: none; }
}
.buy-box { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); display: grid; gap: 12px; }
.buy-box ul { margin: 0; padding-left: 1.2em; color: var(--ink-soft); }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.checks li { padding-left: 32px; position: relative; }
.checks li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 22px; height: 22px; border-radius: 50%; background: var(--green-soft); color: var(--green-ink); font-weight: 900; font-size: 0.8rem; display: grid; place-items: center; }
.split { display: grid; gap: 20px; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.panel h3 { margin-bottom: 12px; }
.total { font-weight: 800; margin: 12px 0 0; }
.math { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--sun-soft); border-radius: 12px; padding: 14px 16px; font-size: 1rem; }
.sample { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.sample th, .sample td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); }
.sample th { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-soft); }
.table-scroll { overflow-x: auto; }
.note-line { margin-top: 1em; }
.panel ol { margin: 0 0 8px; padding-left: 1.3em; color: var(--ink-soft); }
.example-tag { font-size: 0.8rem; color: var(--ink-soft); margin-top: 8px; }
.flag { font-size: 0.72rem; font-weight: 800; padding: 2px 8px; border-radius: 999px; background: var(--warn-soft); color: var(--warn-ink); white-space: nowrap; }
.flag.green { background: var(--green-soft); color: var(--green-ink); }
.flag.ink { background: #e6ebf5; color: var(--ink); }
.flag.sun { background: var(--sun-soft); color: #7a5600; }

/* Simple pages */
.page { padding: 48px 0 64px; }
.page .prose { max-width: 680px; }
.contact-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); max-width: 560px; }
.contact-card .email { font-size: 1.15rem; font-weight: 800; word-break: break-all; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0 40px; color: var(--ink-soft); font-size: 0.92rem; }
.site-footer .wrap { display: grid; gap: 12px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.site-footer a { color: var(--ink-soft); }
.disclaim { font-weight: 700; color: var(--ink); }

/* Tablet and up */
@media (min-width: 720px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr 1fr; }
  .signup { padding: 44px; }
  .product-hero .cover { max-width: 340px; }
  .signup form { flex-direction: row; flex-wrap: wrap; align-items: center; }
  .signup label { width: 100%; }
  .signup input { flex: 1; }
}

/* Desktop */
@media (min-width: 980px) {
  section { padding: 80px 0; }
  .hero { padding: 72px 0 80px; }
  .hero .wrap { grid-template-columns: 1.15fr 1fr; }
  .cards { grid-template-columns: repeat(4, 1fr); }
  .cards .cover { aspect-ratio: 4 / 3; }
  .product-hero .wrap { grid-template-columns: 340px 1fr 320px; }
  .logo img { height: 52px; }
  .site-footer .wrap { grid-template-columns: 1fr auto; align-items: center; }
}

@media (prefers-reduced-motion: no-preference) {
  .btn, .nav a { transition: background-color 0.15s, color 0.15s; }
}

/* No-scroll home page: header, hero, three book rows, one CTA, footer all fit one viewport. */
html.noscroll, html.noscroll body { height: 100vh; height: 100dvh; overflow: hidden; }
html.noscroll body { display: flex; flex-direction: column; font-size: clamp(0.9rem, 1.9vh, 1.0625rem); }
html.noscroll .preview-bar { padding: 4px 12px; font-size: 0.78rem; }
html.noscroll .site-header .wrap { padding-top: clamp(6px, 1.4vh, 14px); padding-bottom: clamp(6px, 1.4vh, 14px); }
html.noscroll .logo img { height: clamp(30px, 5.5vh, 52px); }
.home { flex: 1; min-height: 0; width: 100%; max-width: var(--max); margin: 0 auto; padding: clamp(10px, 3vh, 40px) 20px; display: flex; flex-direction: column; justify-content: center; gap: clamp(12px, 3.5vh, 40px); }
.home section { padding: 0; }
.home-hero .kicker { margin-bottom: clamp(4px, 1vh, 10px); font-size: clamp(0.68rem, 1.5vh, 0.82rem); }
.home-hero h1 { font-size: clamp(1.5rem, min(7.2vw, 7.5vh), 3.6rem); margin: 0; }
.home-hero h1 span { display: block; color: var(--green-text); }
.home-books { display: grid; gap: clamp(8px, 1.6vh, 20px); }
.mini-card { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; padding: clamp(8px, 1.4vh, 14px) 14px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); color: var(--ink); text-decoration: none; }
.mini-card:hover { border-color: var(--green); }
.mini-card:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }
.mini-cover { width: clamp(36px, 6vh, 64px); aspect-ratio: 1; border-radius: 10px; display: grid; place-items: center; font-weight: 900; font-size: clamp(1rem, 2.6vh, 1.6rem); grid-auto-flow: column; }
.mini-cover .g { color: var(--green); }
.mini-text { display: grid; gap: 2px; line-height: 1.25; }
.mini-text strong { font-size: clamp(0.98rem, 2.2vh, 1.3rem); }
.mini-text span { color: var(--ink-soft); font-size: 0.92em; }
.mini-price { font-weight: 900; font-size: clamp(1.1rem, 2.8vh, 1.7rem); }
.home-cta .btn { min-height: clamp(40px, 5.5vh, 52px); padding-top: 8px; padding-bottom: 8px; }
.home-footer { padding: clamp(6px, 1.2vh, 14px) 0; font-size: 0.8rem; }
.home-footer p { margin: 0; }
.home-footer .wrap { gap: 2px 18px; }
.home-footer nav { gap: 2px 14px; }
.page-cta { margin: 28px 0 0; }
@media (min-width: 720px) {
  .home-books { grid-template-columns: repeat(3, 1fr); }
  .mini-card { grid-template-columns: auto 1fr; grid-template-rows: auto auto; padding: clamp(12px, 2.2vh, 22px); }
  .mini-cover { grid-row: span 2; }
  .mini-price { grid-column: 2; }
}
@media (min-width: 980px) {
  .home-footer .wrap { grid-template-columns: 1fr auto; align-items: center; }
}
/* Short phones (e.g. 375x667): drop the card taglines so the home page still fits. */
@media (max-width: 719px) and (max-height: 760px) {
  .mini-text span { display: none; }
  .home { gap: 10px; padding-top: 8px; padding-bottom: 8px; }
  .home-books { gap: 6px; }
  .home-footer { padding: 4px 0; font-size: 0.72rem; }
}
#faq.page + #newsletter { padding-top: 0; }