/* Version F: D's content in a newsletter-editorial style.
   Patterns from aiwithremy.com (weighted most) and theactionableai.com/newsletter, in
   Day 'n' Nite io gold and charcoal. Reference sites are data; each pattern is adopted on purpose. */

:root {
  --bg: #ffffff;
  --bg-2: #faf8f3;
  --paper: #fbf7ec;
  --ink: #121212;
  --muted: #5f6166;
  --faint: #9a9ca1;
  --line: #e6e3db;
  --gold: #e9b949;
  --gold-soft: #f9edc8;
  --gold-deep: #7d5a0c;
  --dark: #141413;
  --ok: #2f9e62;
  --sans: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --mono: "Space Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --wrap: 1120px;
  --gutter: clamp(16px, 4vw, 40px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; }
a { color: inherit; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.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(--gold); color: var(--ink); padding: 8px 14px; z-index: 50; }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--gold-deep); outline-offset: 3px; }

/* Thin sticky bar with mono, slash-prefixed links (Remy). */
.bar { position: sticky; top: 0; z-index: 20; background: rgba(255, 255, 255, 0.86); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.bar-row { display: flex; align-items: center; gap: 16px; min-height: 52px; }
.brand { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; }
.brand img { border-radius: 50%; }
.brand-name { font: 700 0.75rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold-deep); }
.nav { list-style: none; display: flex; gap: 4px; margin: 0 auto; padding: 0; }
.nav a, .bar-cta { font: 400 0.75rem/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; text-decoration: none; color: var(--muted); padding: 8px 10px; border-radius: 4px; }
.nav a:hover { color: var(--ink); background: var(--bg-2); }
.bar-cta { color: var(--ink); border: 1px solid var(--ink); }
.bar-cta:hover { background: var(--ink); color: #fff; }

/* Centered hero, two-line headline, ASCII art flanking (Remy). */
.hero { position: relative; overflow: hidden; padding: clamp(48px, 8vw, 96px) 0 0; }
.hero-inner { position: relative; text-align: center; display: grid; justify-items: center; }
.ascii { position: absolute; top: 24px; margin: 0; font: 400 9px/9px var(--mono); color: #c9b98d; white-space: pre; pointer-events: none; user-select: none; opacity: 0.85; }
.ascii-l { left: max(-80px, calc(50% - 860px)); }
.ascii-r { right: max(-80px, calc(50% - 860px)); top: 120px; }
.mono-kicker { font: 400 0.75rem/1.5 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--gold-deep); margin: 0 0 18px; }
h1 { font-size: clamp(2.125rem, 5.4vw, 4rem); line-height: 1.02; letter-spacing: -0.03em; font-weight: 650; margin: 0; max-width: 20ch; }
.hero-sub { color: var(--muted); font-size: clamp(1rem, 1.4vw, 1.125rem); max-width: 40rem; margin: 20px 0 0; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 28px 0 0; }
.btn { font: 700 0.8125rem/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; text-decoration: none; padding: 14px 18px; border: 1px solid var(--ink); background: var(--ink); color: #fff; border-radius: 4px; transition: transform 120ms ease, background-color 160ms ease; }
.btn:active { transform: translateY(1px); }
.btn-quiet { background: #fff; color: var(--ink); }
.btn-quiet:hover { background: var(--gold-soft); }
.live-line { display: inline-flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px; margin: 22px 0 0; font: 400 0.6875rem/1.5 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); display: inline-block; flex: none; }

/* Product window peeking under the hero (Remy). */
.window { position: relative; margin: clamp(40px, 6vw, 64px) auto 0; max-width: 860px; border: 1px solid var(--line); border-bottom: 0; border-radius: 10px 10px 0 0; overflow: hidden; background: #fff; box-shadow: 0 -2px 40px rgba(0, 0, 0, 0.06); }
.window-bar { display: flex; align-items: center; gap: 6px; padding: 10px 12px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.window-bar i { width: 9px; height: 9px; border-radius: 50%; background: #d8d5cc; }
.window-bar span { margin-left: 10px; font: 400 0.6875rem/1 var(--mono); color: var(--faint); letter-spacing: 0.04em; }
.window img { display: block; width: 100%; height: auto; max-height: 380px; object-fit: cover; object-position: top; }

/* Fact ticker (Actionable): only facts already stated on this page. */
.ticker { background: var(--dark); color: #f3efe4; overflow: hidden; border-block: 1px solid #000; }
.ticker-track { display: flex; width: max-content; animation: ticker 40s linear infinite; }
.ticker p { display: flex; margin: 0; padding: 14px 0; }
.ticker span { font: 400 0.75rem/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; white-space: nowrap; padding: 0 22px; }
.ticker span::after { content: "✦"; color: var(--gold); margin-left: 44px; }
@keyframes ticker { to { transform: translateX(-50%); } }

/* Numbered section heads with a rule and a ghost numeral (Actionable). */
.section { padding: clamp(64px, 9vw, 112px) 0; }
.tint { background: var(--bg-2); }
.sec-head { position: relative; margin-bottom: clamp(28px, 4vw, 48px); }
.sec-head::before { content: attr(data-ghost); position: absolute; right: 0; top: 0.3em; font: 700 clamp(5rem, 12vw, 9rem)/1 var(--sans); letter-spacing: -0.05em; color: rgba(18, 18, 18, 0.04); pointer-events: none; }
.sec-no { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px; margin: 0 0 18px; padding-bottom: 10px; border-bottom: 1px solid var(--ink); font: 400 0.75rem/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold-deep); }
.sec-no span { color: var(--faint); }
h2 { font-size: clamp(1.875rem, 4vw, 3rem); line-height: 1.04; letter-spacing: -0.03em; font-weight: 650; margin: 0; max-width: 22ch; }

/* Systems */
.sys { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(24px, 4vw, 48px); padding: clamp(28px, 4vw, 48px) 0; border-top: 1px solid var(--line); scroll-margin-top: 72px; }
.sys:first-of-type { border-top: 0; padding-top: 0; }
.pill-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 14px; }
.pill { font: 400 0.6875rem/1 var(--mono); letter-spacing: 0.05em; text-transform: uppercase; padding: 6px 8px; border: 1px solid var(--line); border-radius: 4px; color: var(--muted); background: #fff; }
.sys h3 { font-size: clamp(1.375rem, 2.3vw, 1.75rem); line-height: 1.15; letter-spacing: -0.02em; font-weight: 650; margin: 0 0 10px; }
.sys-lede { color: var(--muted); margin: 0; }
.checks { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; }
.checks li { position: relative; padding-left: 28px; line-height: 1.5; }
.checks li::before { content: ""; position: absolute; left: 0; top: 3px; width: 18px; height: 18px; border-radius: 4px; background: var(--gold-soft) no-repeat center / 12px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2 6.2 4.8 9 10 3' fill='none' stroke='%237d5a0c' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); }
.checks strong { font-weight: 650; }
.status { display: flex; gap: 10px; align-items: baseline; margin: 20px 0 0; font: 400 0.75rem/1.5 var(--mono); letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.status .dot { transform: translateY(-1px); }

.gallery { display: grid; gap: 12px; grid-template-columns: repeat(2, minmax(0, 1fr)); align-content: start; }
.gallery .shot:first-child { grid-column: 1 / -1; }
.shot { appearance: none; border: 1px solid var(--line); padding: 0; margin: 0; cursor: zoom-in; text-align: left; background: #fff; border-radius: 6px; overflow: hidden; display: flex; flex-direction: column; font: inherit; color: inherit; transition: box-shadow 160ms ease, transform 120ms ease; }
.shot:hover { box-shadow: 0 6px 22px rgba(0, 0, 0, 0.08); }
.shot:active { transform: translateY(1px); }
.shot img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: cover; background: var(--bg-2); border-bottom: 1px solid var(--line); }
.shot span { padding: 10px 12px 12px; font-size: 0.8125rem; color: var(--muted); line-height: 1.4; }

/* Two-column contrast cards: crossed list vs checked list (Remy, Actionable). */
.compare { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; max-width: 900px; }
.cmp { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: clamp(20px, 3vw, 28px); }
.cmp-yes { border-color: var(--ink); box-shadow: 4px 4px 0 var(--ink); }
.cmp-tag { display: inline-block; margin: 0 0 16px; font: 400 0.6875rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; padding: 6px 8px; border-radius: 4px; background: var(--bg-2); color: var(--muted); }
.cmp-yes .cmp-tag { background: var(--gold); color: var(--ink); }
.cmp ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.cmp li { position: relative; padding-left: 26px; font-size: 0.9375rem; line-height: 1.45; }
.cmp-no li { color: var(--muted); }
.cmp-no li::before { content: "×"; position: absolute; left: 2px; top: -1px; font: 700 1rem/1.4 var(--mono); color: var(--faint); }
.cmp-yes li::before { content: "✓"; position: absolute; left: 2px; top: 0; font: 700 0.875rem/1.5 var(--mono); color: var(--gold-deep); }

/* The note: a typed letter on lined paper with a header block, highlights, stamp and signature (Remy). */
.letter { position: relative; max-width: 720px; margin: 0 auto; background: var(--paper); border: 1px solid #ebe3cc; box-shadow: 0 18px 50px rgba(60, 45, 10, 0.1); padding: clamp(24px, 5vw, 56px); font: 400 0.9375rem/2 var(--mono); background-image: repeating-linear-gradient(to bottom, transparent 0, transparent calc(2em - 1px), rgba(125, 90, 12, 0.08) calc(2em - 1px), rgba(125, 90, 12, 0.08) 2em); }
.letter-head { margin: 0 0 22px; padding-bottom: 14px; border-bottom: 1px solid #e0d6b8; display: grid; gap: 0; font-size: 0.8125rem; line-height: 1.9; }
.letter-head div { display: grid; grid-template-columns: 64px 1fr; }
.letter-head dt { text-transform: uppercase; letter-spacing: 0.08em; color: var(--faint); }
.letter-head dd { margin: 0; }
.letter-body p { margin: 0 0 1em; }
mark { background: var(--gold-soft); color: inherit; padding: 1px 3px; }
.sign { font: italic 600 1.75rem/1.2 Georgia, "Times New Roman", serif; color: var(--ink); margin-top: 1.4em !important; }
.stamp { position: absolute; top: 18px; right: 18px; transform: rotate(6deg); border: 1.5px dashed var(--gold-deep); padding: 8px 10px; display: grid; justify-items: center; gap: 4px; font: 700 0.5625rem/1.2 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--gold-deep); background: rgba(255, 255, 255, 0.5); }
.stamp img { border-radius: 50%; }
.candidate { font: 400 0.75rem/1.6 var(--sans); color: var(--muted); border-top: 1px dashed #e0d6b8; padding-top: 12px; }
.tag { display: inline-block; font: 400 0.6875rem/1 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; padding: 4px 6px; border: 1px dashed var(--gold-deep); color: var(--gold-deep); margin-right: 6px; }
@media (max-width: 600px) { .stamp { position: static; transform: none; justify-self: start; display: inline-grid; margin-bottom: 16px; } }

/* FAQ: bordered rows with a mono [+] (Remy, Actionable). */
.faq-grid { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: clamp(24px, 5vw, 64px); align-items: start; }
.faq { border-top: 1px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 16px; padding: 18px 2px; font-weight: 600; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "[+]"; font: 400 0.8125rem/1.6 var(--mono); color: var(--gold-deep); flex: none; }
.faq details[open] summary::after { content: "[−]"; }
.faq details p { margin: 0 0 18px; color: var(--muted); max-width: 60ch; }

/* Dark closing band (Actionable). */
.close { background: var(--dark); color: #f3efe4; padding: clamp(56px, 8vw, 96px) 0; background-image: radial-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px); background-size: 18px 18px; }
.close .sec-no { border-color: rgba(255, 255, 255, 0.4); color: var(--gold); }
.close h2 { color: #fff; }
.close-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(24px, 5vw, 64px); align-items: end; }
.close-card { border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 8px; padding: 22px; color: #cfcabd; }
.close-card .mono-kicker { color: var(--gold); margin-bottom: 10px; }
.close-card p:last-child { margin: 0; }

/* Footer with a large mono wordmark (Remy). */
.foot { padding: 48px 0 32px; border-top: 1px solid var(--line); }
.foot-mark { margin: 0 0 24px; font: 700 clamp(1.75rem, 6vw, 3.5rem)/1 var(--mono); letter-spacing: 0.02em; text-transform: uppercase; color: var(--gold-deep); overflow-wrap: anywhere; }
.foot-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; font: 400 0.6875rem/1.6 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--faint); }
.foot-row p { margin: 0; }
.foot-row a { color: var(--gold-deep); }

/* Screenshot viewer (same behaviour as D). */
.viewer { border: 0; padding: 0; background: transparent; max-width: min(1240px, 94vw); max-height: 92vh; overflow: visible; }
.viewer::backdrop { background: rgba(0, 0, 0, 0); transition: background-color 380ms ease; }
.viewer.is-open::backdrop { background: rgba(0, 0, 0, 0.6); }
.viewer figure { margin: 0; background: #fff; border-radius: 8px; overflow: hidden; transform: translate(var(--from-x, 0), var(--from-y, 0)) scale(var(--from-s, 0.9)); opacity: 0; transition: transform 380ms cubic-bezier(0.22, 1, 0.36, 1), opacity 200ms ease; }
.viewer.is-open figure { transform: none; opacity: 1; }
.viewer img { display: block; max-width: 100%; max-height: calc(92vh - 56px); margin: 0 auto; }
.viewer figcaption { padding: 12px 16px; font-size: 0.875rem; color: var(--muted); }
.viewer-close { position: absolute; top: -14px; right: -14px; border: 1px solid var(--ink); border-radius: 4px; padding: 8px 12px; background: #fff; font: 700 0.75rem/1 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; cursor: pointer; }

@media (max-width: 900px) {
  .sys, .faq-grid, .close-row { grid-template-columns: minmax(0, 1fr); }
  .nav { display: none; }
  .bar-cta { margin-left: auto; }
  .ascii { opacity: 0.35; }
  .ascii-l { left: -120px; } .ascii-r { right: -120px; }
}
@media (max-width: 600px) {
  .compare, .gallery { grid-template-columns: minmax(0, 1fr); }
  .viewer-close { top: 8px; right: 8px; }
  .brand-name { font-size: 0.6875rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .ticker-track { animation: none; }
  .viewer figure { transform: none !important; transition: opacity 200ms ease !important; }
}