/* =============================================================
   PLURAL FUTURES — SITE LAYER  (remix / v2)
   Builds on pf-foundations.css. Component + layout classes for
   the marketing site. Plurality is the brand: five futures-inks,
   warm paper, editorial bones, spectra at the key moments.
   ============================================================= */

/* -------------------------------------------------------------
   PER-INK THEMING
   Any element (usually a <section> or a card) can claim a local
   ink with data-ink="…". Everything inside re-reads --accent.
   The global default lives in :root (Tweaks-driven, ember).
   ------------------------------------------------------------- */
[data-ink="ember"]  { --accent: var(--ember);  --accent-deep: var(--ember-deep);  --accent-soft: var(--ember-soft);  --accent-wash: var(--ember-wash);  --accent-grad: var(--ember); }
[data-ink="bloom"]  { --accent: var(--bloom);  --accent-deep: var(--bloom-deep);  --accent-soft: var(--bloom-soft);  --accent-wash: var(--bloom-wash);  --accent-grad: var(--bloom); }
[data-ink="sky"]    { --accent: var(--sky);    --accent-deep: var(--sky-deep);    --accent-soft: var(--sky-soft);    --accent-wash: var(--sky-wash);    --accent-grad: var(--sky); }
[data-ink="sprout"] { --accent: var(--sprout); --accent-deep: var(--sprout-deep); --accent-soft: var(--sprout-soft); --accent-wash: var(--sprout-wash); --accent-grad: var(--sprout); }
[data-ink="loam"]   { --accent: var(--loam);   --accent-deep: var(--loam-deep);   --accent-soft: var(--loam-soft);   --accent-wash: var(--loam-wash);   --accent-grad: var(--loam); }

/* -------------------------------------------------------------
   LAYOUT SCAFFOLD
   ------------------------------------------------------------- */
.pf-container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.pf-container--narrow { max-width: 880px; }

.pf-section { padding: clamp(72px, 9vw, 132px) 0; position: relative; }
.pf-section--tight { padding: clamp(56px, 7vw, 96px) 0; }
.pf-bg-1 { background: var(--paper); }
.pf-bg-2 { background: var(--paper-2); }
.pf-bg-3 { background: var(--paper-3); }
.pf-bg-surface { background: var(--surface); }
.pf-bg-ink { background: var(--ink); color: var(--paper); }

/* Spectrum-tinted divider that sits BETWEEN sections.
   A hairline in the section's local ink, with a thin spectrum
   seam — the brand's "plurality" made structural. */
.pf-seam { height: 4px; width: 100%; background: var(--spectrum); }
.pf-seam--soft { background: var(--spectrum-soft); }
.pf-hr { border: 0; border-top: 1px solid var(--line); margin: 0; }
.pf-hr--ink { border-top: var(--stroke) solid var(--line-ink); }

/* -------------------------------------------------------------
   SECTION HEADS — eyebrow tick + accent srule + display h2
   ------------------------------------------------------------- */
.pf-srule { height: 4px; width: 56px; border-radius: 2px; background: var(--accent-grad); margin-bottom: 22px; }
.pf-overline { font-family: var(--font-mono); font-size: var(--fs-label); font-weight: 500; letter-spacing: var(--ls-label); text-transform: uppercase; color: var(--ink-3); }
.pf-headrow { display: flex; align-items: flex-end; justify-content: space-between; gap: clamp(24px, 4vw, 64px); flex-wrap: wrap; }
.pf-section-title { font-family: var(--font-display); font-weight: 700; font-size: var(--fs-display-m); line-height: var(--lh-display); letter-spacing: -0.02em; color: var(--ink); margin: 0; text-wrap: balance; }
.pf-section-sub { font-family: var(--font-body); font-size: var(--fs-lead); line-height: 1.5; color: var(--ink-2); margin: 0; max-width: 40ch; text-wrap: pretty; }

/* -------------------------------------------------------------
   HEADER / NAV
   ------------------------------------------------------------- */
.pf-header { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--paper) 80%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(150%); backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid var(--line); }
.pf-header__seam { height: 3px; background: var(--spectrum); }
.pf-header__in { max-width: var(--container); margin: 0 auto; padding: 14px var(--gutter); display: flex; align-items: center; justify-content: space-between; gap: var(--sp-6); }
.pf-logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.pf-logo img { height: 30px; width: auto; display: block; }
.pf-nav { display: flex; align-items: center; gap: 4px; }
.pf-nav a { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--ink-2);
  text-decoration: none; padding: 8px 13px; border-radius: var(--r-pill); white-space: nowrap;
  transition: background var(--dur-1) var(--ease), color var(--dur-1) var(--ease); }
.pf-nav a:hover { color: var(--ink); background: var(--paper-2); }
.pf-nav a.is-active { color: var(--accent-on); background: var(--accent); }
.pf-nav__cta { display: inline-flex; align-items: center; gap: 8px; margin-left: 6px; }
@media (max-width: 1120px) {
  .pf-nav a.pf-nav__sec { display: none; }
}
@media (max-width: 820px) {
  .pf-nav a:not(.pf-nav__cta) { display: none; }
}

/* -------------------------------------------------------------
   BUTTONS
   ------------------------------------------------------------- */
.btn { font-family: var(--font-display); font-weight: 600; font-size: 14px; letter-spacing: -0.005em;
  padding: 12px 20px; border-radius: var(--radius); border: 1.5px solid transparent; cursor: pointer;
  display: inline-flex; align-items: center; gap: 9px; text-decoration: none; line-height: 1; white-space: nowrap;
  transition: transform var(--dur-1) var(--ease), background var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease),
              color var(--dur-1) var(--ease), box-shadow var(--dur-1) var(--ease), filter var(--dur-1) var(--ease); }
.btn:active { transform: translateY(1px); }
.btn .arr { font-family: var(--font-mono); font-weight: 500; }
.btn--primary { background: var(--accent-grad); color: var(--accent-on); }
.btn--primary:hover { box-shadow: 0 10px 26px -12px var(--accent); filter: brightness(1.05); color: var(--accent-on); }
.btn--outline { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn--outline:hover { background: var(--ink); color: var(--paper); }
.btn--ghost { background: transparent; color: var(--accent-deep); border-color: transparent; padding-left: 4px; padding-right: 4px; }
.btn--ghost:hover { color: var(--accent); }
.btn--lg { font-size: 16px; padding: 15px 26px; }
.btn--on-ink.btn--primary { background: var(--paper); color: var(--ink); }
.btn--on-ink.btn--primary:hover { box-shadow: 0 10px 26px -12px rgba(0,0,0,0.5); }
.btn--on-ink.btn--outline { color: var(--paper); border-color: rgba(251,247,241,0.4); }
.btn--on-ink.btn--outline:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

/* link with mono arrow */
.pf-arrowlink { font-family: var(--font-mono); font-size: 12px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; white-space: nowrap;
  color: var(--ink); text-decoration: none; display: inline-flex; align-items: center; gap: 8px;
  border-bottom: 1.5px solid var(--ink); padding-bottom: 4px; transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease); }
.pf-arrowlink:hover { color: var(--accent-deep); border-color: var(--accent); }

/* -------------------------------------------------------------
   GLYPH FIGURE TILE — rounded, wash-tinted, holds an inline glyph
   ------------------------------------------------------------- */
.pf-glyphtile { display: flex; align-items: center; justify-content: center; border-radius: var(--radius);
  background: var(--accent-wash); color: var(--accent-deep); aspect-ratio: 1 / 1; }
.pf-glyphtile svg { width: 64%; height: 64%; display: block; }
.pf-glyph { color: var(--accent-deep); display: block; }

/* -------------------------------------------------------------
   CARDS
   ------------------------------------------------------------- */
.pf-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface);
  display: flex; flex-direction: column; overflow: hidden;
  transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease); }
.pf-card--link { cursor: pointer; text-decoration: none; color: var(--ink); }
.pf-card--link:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); border-color: var(--line-2); }
.pf-card__fig { display: flex; align-items: center; justify-content: center; padding: 26px; background: var(--accent-wash); color: var(--accent-deep); }
.pf-card__fig svg { width: 84px; height: 84px; }
.pf-card__body { padding: clamp(22px, 2.4vw, 32px); display: flex; flex-direction: column; gap: 14px; flex: 1; }

/* tone tags / pills */
.pf-tag { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; padding: 6px 11px;
  border-radius: var(--r-pill); border: 1px solid var(--line-2); color: var(--ink-2); background: var(--paper);
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.pf-tag--accent { background: var(--accent-wash); color: var(--accent-deep); border-color: transparent; }
.pf-pill-link { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; padding: 9px 15px; border-radius: var(--r-pill);
  border: 1.5px solid var(--line-2); color: var(--ink); background: transparent; text-decoration: none; display: inline-flex; align-items: center; gap: 7px;
  transition: background var(--dur-1) var(--ease), color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease); }
.pf-pill-link:hover { background: var(--accent); color: var(--accent-on); border-color: transparent; }

/* -------------------------------------------------------------
   MOTIF FIELDS — low-opacity background patterns in the local ink
   ------------------------------------------------------------- */
.pf-motif { position: absolute; inset: 0; pointer-events: none; opacity: var(--motif-opacity); z-index: 0; }
.pf-motif--dots { background-image: radial-gradient(circle, var(--accent) 2px, transparent 2.5px); background-size: 30px 30px; background-position: 0 0; }
.pf-motif--grid { background-image: linear-gradient(var(--accent) 1px, transparent 1px), linear-gradient(90deg, var(--accent) 1px, transparent 1px); background-size: 56px 56px; }
.pf-motif--rings { background-image: repeating-radial-gradient(circle at 90% 10%, transparent 0 38px, var(--accent) 38px 39px); }
.pf-motif--fade-r { -webkit-mask-image: linear-gradient(90deg, transparent, #000 60%); mask-image: linear-gradient(90deg, transparent, #000 60%); }
.pf-motif--fade-l { -webkit-mask-image: linear-gradient(90deg, #000 40%, transparent); mask-image: linear-gradient(90deg, #000 40%, transparent); }
.pf-rellayer { position: relative; z-index: 1; }

/* -------------------------------------------------------------
   DARK BANDS (reach-out / page close)
   ------------------------------------------------------------- */
.pf-band { background: var(--ink); color: var(--paper); position: relative; overflow: hidden; }
.pf-band .pf-overline { color: var(--accent-soft); }
.pf-band__display { font-family: var(--font-display); font-weight: 700; font-size: var(--fs-display-m); line-height: var(--lh-display);
  letter-spacing: -0.02em; color: var(--paper); margin: 0; text-wrap: balance; }
.pf-band__sub { font-family: var(--font-body); font-style: italic; font-size: var(--fs-lead); line-height: 1.45; color: rgba(251,247,241,0.72); margin: 0; }

/* -------------------------------------------------------------
   FOOTER
   ------------------------------------------------------------- */
.pf-footer { background: var(--ink); color: var(--paper); padding: clamp(64px, 8vw, 112px) 0 36px; }
.pf-footer__top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: clamp(32px, 4vw, 56px);
  padding-bottom: 48px; border-bottom: 1px solid rgba(251,247,241,0.18); }
.pf-footer__word { font-family: var(--font-display); font-weight: 800; font-size: clamp(40px, 5.5vw, 72px); line-height: 0.9; letter-spacing: -0.03em; margin: 0; color: var(--paper); }
.pf-footer__tag { font-family: var(--font-body); font-style: italic; font-size: 16px; line-height: 1.5; color: rgba(251,247,241,0.66); margin: 18px 0 0; max-width: 30ch; }
.pf-footer h5 { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: rgba(251,247,241,0.5); margin: 0 0 14px; }
.pf-footer a.pf-footer__link, .pf-footer p.pf-footer__link { font-family: var(--font-body); font-size: 15px; color: var(--paper); margin: 0 0 7px; text-decoration: none; display: block; transition: color var(--dur-1) var(--ease); }
.pf-footer a.pf-footer__link:hover { color: var(--sprout); }
.pf-footer__bottom { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-top: 28px; flex-wrap: wrap; }
.pf-footer__fine { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; color: rgba(251,247,241,0.5); }
.pf-footer__endmark { width: 30px; height: 30px; border-radius: 8px; background: var(--spectrum); }

/* -------------------------------------------------------------
   COMPARISON TABLE (strategy page)
   ------------------------------------------------------------- */
.pf-table { border: 1.5px solid var(--ink); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.pf-table__row { display: grid; grid-template-columns: 0.8fr 1fr 1.3fr; }
.pf-table__row + .pf-table__row { border-top: 1px solid var(--line); }
.pf-table__head { border-bottom: 1.5px solid var(--ink); }
.pf-table__cell { padding: 22px clamp(18px, 2vw, 26px); }
.pf-table__cell + .pf-table__cell { border-left: 1px solid var(--line); }
.pf-table__head .pf-table__cell { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; }
.pf-table__head .pf-table__cell + .pf-table__cell { border-left: 1.5px solid var(--ink); }
.pf-cell-a { background: var(--paper-2); color: var(--ink-3); }
.pf-cell-b { background: var(--ink); color: var(--paper); }

/* -------------------------------------------------------------
   ENTRANCE — transform-only so content is always visible
   ------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .pf-rise { animation: pf-rise var(--dur-3) var(--ease) both; }
  @keyframes pf-rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
}

/* -------------------------------------------------------------
   RESPONSIVE
   ------------------------------------------------------------- */
/* Sectors intro — three-systems cell dividers (line-first) */
.so-syscell + .so-syscell { border-left: 1px solid var(--line); }

@media (max-width: 980px) {
  .pf-footer__top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .pf-collapse-2, .pf-collapse-3 { grid-template-columns: 1fr !important; }
  .pf-table__row { grid-template-columns: 1fr; }
  .pf-table__cell + .pf-table__cell { border-left: 0; border-top: 1px solid var(--line); }
  .pf-table__head .pf-table__cell + .pf-table__cell { border-left: 0; }
  .so-syscell + .so-syscell { border-left: 0; border-top: 1px solid var(--line); }
}
@media (max-width: 620px) {
  .pf-footer__top { grid-template-columns: 1fr; }
}