/* ==========================================================================
   Slova Applications — "Editorial" theme
   Warm paper, ink, Fraunces display serif. Photography-first.
   ========================================================================== */

:root {
  --paper: #f4f2ed;
  --paper-raised: #faf9f5;
  --ink: #1a1713;
  --muted: #5d574e;
  --faint: #8a8378;
  --rule: #dcd6cb;
  --rule-strong: #b8b1a4;
  --accent: #bf3b11;      /* darkroom red, nods to perframe.app */
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --wrap: 1140px;
  --measure: 640px;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--ink); color: var(--paper); }

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 560; letter-spacing: -0.01em; line-height: 1.08; margin: 0 0 0.45em; font-variation-settings: "opsz" 90, "SOFT" 0, "WONK" 0; }
h1 { font-size: clamp(2.4rem, 5.6vw, 4.1rem); }
h1 em { font-style: italic; font-variation-settings: "WONK" 1; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.5rem); }
h3 { font-size: 1.35rem; }
p { margin: 0 0 1.1em; }

a { color: inherit; text-decoration: none; }

.container { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }
.container--measure { max-width: 760px; }

.kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 18px;
}
.kicker .num { color: var(--accent); }

.rule-heavy { border: 0; border-top: 3px solid var(--ink); margin: 0; }
.rule { border: 0; border-top: 1px solid var(--rule); margin: 0; }

/* Buttons / links (also used inside markdown content) --------------------- */

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 22px;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: background 0.15s ease, color 0.15s ease;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--ghost { border-color: var(--rule-strong); }

.link-arrow { font-weight: 600; border-bottom: 1px solid var(--rule-strong); }
.link-arrow:hover { border-color: var(--ink); color: var(--accent); }

/* Masthead ----------------------------------------------------------------- */

.nav { padding: 22px 0 16px; background: var(--paper); border-bottom: 1px solid var(--rule); }
.nav-inner { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; }
.nav-brand { font-family: var(--serif); font-size: 1.35rem; font-weight: 600; letter-spacing: -0.01em; }
.nav-links { display: flex; align-items: baseline; gap: 26px; list-style: none; margin: 0; padding: 0; }
.nav-links li { margin: 0; }
.nav-links a { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.nav-links a:hover { color: var(--ink); }
.nav-links a.nav-cta { color: var(--accent); }

/* Hero --------------------------------------------------------------------- */

.hero { padding: 72px 0 64px; }
.hero-text { max-width: 720px; }
.hero h1 em { font-style: italic; font-variation-settings: "WONK" 1; color: var(--accent); }
.hero .lede { font-size: 1.13rem; color: var(--muted); max-width: 34em; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }

figure.photo { margin: 0; }
figure.photo img { display: block; width: 100%; filter: grayscale(1) contrast(1.05); border: 10px solid var(--paper-raised); box-shadow: 0 0 0 1px var(--rule-strong), 0 22px 40px -24px rgba(26, 23, 19, 0.45); }
figure.photo figcaption { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em; color: var(--faint); margin-top: 12px; display: flex; justify-content: space-between; gap: 12px; }
figure.photo figcaption .placeholder { color: var(--accent); }

/* Stats -------------------------------------------------------------------- */

.stats { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 3px solid var(--ink); }
.stat { padding: 26px 22px 30px; border-right: 1px solid var(--rule); }
.stat:last-child { border-right: 0; }
.stat-num { font-family: var(--serif); font-size: 2.6rem; font-weight: 520; line-height: 1; font-variant-numeric: tabular-nums; }
.stat-num .unit { font-size: 1.4rem; color: var(--accent); }
.stat-label { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.08em; color: var(--muted); margin-top: 10px; text-transform: uppercase; }

/* Sections ------------------------------------------------------------------ */

.section { padding: 84px 0; }
.section--tight { padding: 60px 0; }
.section-head { margin-bottom: 44px; }
.section-head h2 { margin-bottom: 0.2em; }
.section-head p { color: var(--muted); max-width: 38em; }
.section-head--split { display: flex; align-items: baseline; justify-content: space-between; gap: 30px; flex-wrap: wrap; }

/* Capability index ------------------------------------------------------------ */

.cap-index { border-top: 1px solid var(--rule); }
.cap-row { display: grid; grid-template-columns: 64px 240px 1fr; gap: 24px; padding: 26px 4px; border-bottom: 1px solid var(--rule); transition: background 0.15s ease; }
.cap-row:hover { background: var(--paper-raised); }
.cap-num { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); padding-top: 6px; }
.cap-row h3 { font-size: 1.35rem; margin: 0; }
.cap-row p { color: var(--muted); margin: 0; font-size: 0.98rem; }

/* Photo strip (subtle visual break) ------------------------------------------- */

.photo-strip { padding: 60px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.photo-strip-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.photo-strip-grid img { width: 100%; height: 220px; object-fit: cover; filter: grayscale(1) contrast(1.05); }

/* Product note (perframe) --------------------------------------------------------- */

.note { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; border: 1px solid var(--rule-strong); background: var(--paper-raised); padding: 44px; }
.note h3 { font-size: 2rem; margin-bottom: 0.3em; }
.note .perframe-mark b { font-family: var(--serif); font-weight: 600; }
.note .perframe-mark i { font-family: var(--serif); font-style: italic; color: var(--accent); }
.note p { color: var(--muted); }
.note-facts { display: flex; gap: 34px; margin: 22px 0 26px; flex-wrap: wrap; }
.note-facts .fact { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.06em; color: var(--muted); text-transform: uppercase; }
.note-facts .fact strong { display: block; font-family: var(--serif); font-size: 1.7rem; color: var(--ink); font-variant-numeric: tabular-nums; letter-spacing: 0; text-transform: none; margin-bottom: 2px; }
.note img.spotlight-img { display: block; width: 100%; border: 1px solid var(--rule-strong); box-shadow: 0 18px 34px -22px rgba(26, 23, 19, 0.4); }
.note .eyebrow, .eyebrow { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--muted); margin: 0 0 12px; }

/* Case study index (table of contents) --------------------------------------------- */

.toc { border-top: 3px solid var(--ink); }
.toc-row { display: grid; grid-template-columns: 160px 1fr auto; gap: 26px; padding: 30px 4px; border-bottom: 1px solid var(--rule); align-items: baseline; }
.toc-row:hover { background: var(--paper-raised); }
.toc-year { font-family: var(--mono); font-size: 0.8rem; color: var(--faint); }
.toc-figure { min-width: 0; }
.toc-metric { font-family: var(--serif); font-size: 2.1rem; font-weight: 540; line-height: 1.05; color: var(--accent); font-variant-numeric: tabular-nums; }
.toc-metric-label { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); margin-top: 6px; }
.toc-body h3 { font-size: 1.5rem; margin-bottom: 0.25em; }
.toc-body h3 a:hover { color: var(--accent); }
.toc-meta { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.05em; color: var(--accent); margin-bottom: 8px; }
.toc-body p { color: var(--muted); margin: 0; max-width: 52em; font-size: 0.98rem; }
.toc-tags { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.04em; color: var(--faint); margin-top: 10px !important; text-transform: uppercase; }
.toc-cta { font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--faint); white-space: nowrap; }
.toc-row:hover .toc-cta { color: var(--ink); }

/* CTA band (re-used by content raw HTML — keep class, restyle editorially) -------- */

.cta-band { text-align: center; padding: 70px 30px; border-top: 1px solid var(--rule); border-bottom: 3px solid var(--ink); background: var(--paper); margin: 0; }
.cta-band h2 { margin-bottom: 0.25em; }
.cta-band p { color: var(--muted); max-width: 34em; margin: 0 auto 26px; }
.cta-band .btn--primary { background: var(--ink); color: var(--paper); }

/* Interior pages -------------------------------------------------------------------- */

.page-hero { padding: 70px 0 40px; border-bottom: 1px solid var(--rule); }
.page-hero .lede { font-size: 1.15rem; color: var(--muted); max-width: 38em; margin-top: 18px; }

.meta-line { display: flex; gap: 26px; flex-wrap: wrap; font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.06em; color: var(--faint); text-transform: uppercase; margin: 20px 0 0; }
.meta-line span b { color: var(--accent); font-weight: 500; }

.prose { padding: 56px 0 80px; }
.prose h2 { margin-top: 1.8em; font-size: 1.7rem; }
.prose h3 { margin-top: 1.5em; font-size: 1.25rem; }
.prose p, .prose li { color: #37322b; }
.prose strong { color: var(--ink); }
.prose a { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: var(--rule-strong); }
.prose a:hover { text-decoration-color: var(--accent); color: var(--accent); }
.prose img { width: 100%; filter: grayscale(1) contrast(1.05); border: 10px solid var(--paper-raised); box-shadow: 0 0 0 1px var(--rule-strong); margin: 14px 0 22px; }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2.6em 0; }

.pager-back { margin-top: 30px; font-family: var(--mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; }
.pager-back a { color: var(--faint); }
.pager-back a:hover { color: var(--accent); }

/* Footer ------------------------------------------------------------------------------- */

.footer { border-top: 3px solid var(--ink); padding: 34px 0 46px; margin-top: 20px; }
.footer-inner { display: flex; justify-content: space-between; gap: 26px; flex-wrap: wrap; align-items: baseline; }
.footer-brand { font-family: var(--serif); font-size: 1.25rem; font-weight: 600; }
.footer p, .footer a { font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.05em; color: var(--muted); }
.footer a:hover { color: var(--ink); }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; list-style: none; margin: 0; padding: 0; }
.footer-links li { margin: 0; }

/* Subtle entrance ---------------------------------------------------------------------------- */

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* Responsive ---------------------------------------------------------------------------------- */

@media (max-width: 940px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .stat { border-bottom: 1px solid var(--rule); }
  .cap-row { grid-template-columns: 48px 1fr; }
  .cap-row p { grid-column: 2; }
  .photo-strip-grid { grid-template-columns: 1fr 1fr; }
  .note { grid-template-columns: 1fr; gap: 34px; padding: 28px; }
  .toc-row { grid-template-columns: 1fr; gap: 8px; }
  .toc-cta { display: none; }
}
@media (max-width: 620px) {
  .section { padding: 60px 0; }
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 0.7rem; }
  .photo-strip-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
}