/* ============================================================
   Cognitive Arts — the World in 30
   Ink + paper; color only where the visitor adds it.
   ============================================================ */

:root {
  --paper:      #FBF9F4;
  --paper-dim:  #F3EFE6;
  --ink:        #23211B;
  --ink-soft:   #5A554A;
  --ink-faint:  rgba(35, 33, 27, 0.16);
  --line:       rgba(35, 33, 27, 0.16);

  --fern:       #2F9B47;
  --fern-deep:  #3A5544;
  --marigold:   #E5A33A;
  --petal:      #CE9A9F;
  --periwinkle: #7E90B8;

  --serif: "Fraunces", Georgia, serif;
  --sans:  "Instrument Sans", system-ui, sans-serif;
  --mono:  "Spline Sans Mono", ui-monospace, monospace;

  --pad: clamp(1.25rem, 5vw, 3.5rem);
  --wrap: 1200px;
  --radius: 2px;
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, p, dl, ul { margin: 0; }
ul { padding: 0; list-style: none; }
img { display: block; max-width: 100%; }
a { color: inherit; }
::selection { background: var(--marigold); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--marigold);
  outline-offset: 3px;
}

/* The paper feels alive when you scroll to an anchor. */
#series, #why, #start { scroll-margin-top: 5.5rem; }

/* ---------- Utilities ---------- */
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--pad); }
.mono { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.16em; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--paper);
  padding: 0.9rem 1.4rem; z-index: 100;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

.display { font-family: var(--serif); font-weight: 520; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 1.1rem;
}
.eyebrow--onink { color: var(--marigold); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  padding: 0.95rem 1.6rem;
  border-radius: var(--radius);
  border: 2px solid var(--ink);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.btn:active { transform: translateY(1px); }

.btn--primary { background: var(--fern); border-color: var(--fern); color: var(--paper); }
.btn--primary:hover { background: var(--ink); border-color: var(--ink); }

.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }

.btn--sun { background: #2F9B47; border-color: #2F9B47; color: var(--paper); }
.btn--sun:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.btn--ghost-inv { background: transparent; color: var(--paper); border-color: rgba(251, 249, 244, 0.5); }
.btn--ghost-inv:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

.btn--sm { padding: 0.62rem 1.1rem; font-size: 0.88rem; }

.link {
  font-family: var(--mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fern-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.12rem;
}
.link:hover { border-color: var(--fern-deep); }

.linkbtn {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  background: none; border: none;
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--line);
  cursor: pointer;
  padding: 0.2rem 0;
}
.linkbtn:hover { text-decoration-color: var(--ink); }

/* ---------- Site header ---------- */
.sitehead {
  position: sticky; top: 0; z-index: 40;
  background: rgba(251, 249, 244, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.sitehead__in {
  display: flex; align-items: center; gap: 1rem 2rem; flex-wrap: wrap;
  min-height: 4.6rem;
}
.logo {
  display: inline-flex; align-items: center; gap: 0.6rem;
  text-decoration: none; color: var(--ink);
}
.logo__img { height: 3.2rem; width: auto; display: block; }
.sitehead__nav {
  display: flex; gap: 1.6rem;
  margin-left: auto;
}
.sitehead__nav a {
  font-family: var(--mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.2rem 0;
  border-bottom: 1px solid transparent;
}
.sitehead__nav a:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* ---------- Hero ---------- */
.hero { padding-block: clamp(1.75rem, 4vw, 3.5rem) clamp(1.5rem, 3vw, 2.5rem); }
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 4.5rem);
  align-items: center;
}
.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.7rem);
  line-height: 1.03;
  letter-spacing: -0.015em;
  margin-bottom: 1.4rem;
}
.hero__accent { font-style: italic; font-weight: 400; }
.hero__lede {
  font-size: 1.12rem;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 34rem;
  margin-bottom: 2rem;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-bottom: 2.6rem; }

.hero__facts {
  display: flex; flex-wrap: wrap; gap: 1rem 0;
  border-top: 1px solid var(--line);
  max-width: 40rem;
}
.hero__fact { flex: 1 1 11rem; padding-top: 1rem; }
.hero__fact dt {
  font-family: var(--mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  margin-bottom: 0.3rem;
}
.hero__fact dd { font-family: var(--mono); font-size: 0.82rem; letter-spacing: 0.06em; }

/* ---- the live page ---- */
.hero__panel-wrap { min-width: 0; }
.hero__panel {
  position: relative;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 3px;
  box-shadow: 0 1px 2px rgba(35,33,27,0.05), 0 18px 40px -24px rgba(35,33,27,0.35);
  padding: clamp(1.4rem, 3vw, 2.2rem);
  margin-inline: auto;
  max-width: 540px;
}
.hero__label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

.hero-canvas {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FFFFFF;
  image-rendering: auto;
  touch-action: none;
  cursor: crosshair;
  user-select: none;
  -webkit-user-select: none;
}

/* pencil tin */
.tin { display: flex; flex-wrap: wrap; align-items: center; gap: 0.9rem; margin-top: 1.3rem; }
.tin__label { font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--ink-soft); }
.tin__box { display: inline-flex; gap: 0.4rem; }
.tin__swatch {
  width: 2rem; height: 2rem;
  border-radius: 50%;
  border: 2px solid rgba(35, 33, 27, 0.24);
  background: var(--paper-dim);
  color: transparent;
  cursor: pointer;
  position: relative;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.tin__swatch:hover { transform: translateY(-2px); }
.tin__swatch[aria-pressed="true"] {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px var(--paper), 0 0 0 5px var(--ink);
}
.tin__swatch--red     { background: #E63946; }
.tin__swatch--green   { background: #2F9B47; }
.tin__swatch--yellow  { background: #FFC61E; }
.tin__actions { display: inline-flex; align-items: center; gap: 0.5rem; margin-left: 0.2rem; }
.tin__dot { color: var(--line); }
.tin__subrow { display: flex; align-items: center; margin-top: 0.7rem; }

.brush { display: inline-flex; align-items: center; gap: 0.6rem; }
.brush__label {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
}
.brush__dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  background: var(--paper-dim);
  flex: none;
}
.brush__range { width: 7rem; accent-color: var(--ink); cursor: pointer; }
.brush__value {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  width: 2.6rem;
}

.hero__hint {
  margin-top: 0.9rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: #FFC61E;
  display: table;
  padding: 0.32rem 0.55rem;
  border-radius: 2px;
}

/* ---------- Share modal ---------- */
.modal {
  position: fixed; inset: 0; z-index: 90;
  display: flex;
  padding: 1.25rem;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.modal[hidden] { display: none; }
.modal__backdrop {
  position: fixed; inset: 0;
  background: rgba(35, 33, 27, 0.72);
  backdrop-filter: blur(3px);
}
.modal__card {
  position: relative;
  margin: auto;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 4px;
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.6);
  max-width: 460px;
  width: 100%;
  padding: clamp(1.4rem, 4vw, 2.2rem);
}
.modal__close {
  position: absolute; top: 0.8rem; right: 0.8rem;
  width: 2rem; height: 2rem;
  border: none; background: none;
  font-size: 1.4rem; line-height: 1;
  color: var(--ink-soft);
  cursor: pointer;
}
.modal__close:hover { color: var(--ink); }
.modal__title {
  font-family: var(--serif);
  font-weight: 560;
  font-size: 1.5rem;
  line-height: 1.15;
  margin-bottom: 1rem;
}
.modal__preview {
  display: block; width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FFFFFF;
  margin-bottom: 1rem;
}
.modal__caption {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin-bottom: 1.2rem;
}
.modal__actions { display: flex; flex-wrap: wrap; gap: 0.7rem; }

/* ---------- Video modal ---------- */
.modal__card--video { max-width: 820px; }
.video-frame { position: relative; aspect-ratio: 16 / 9; width: 100%; margin-bottom: 1rem; }
.video-frame iframe {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #000;
}

/* ---------- Series ---------- */
.series { padding-block: clamp(4rem, 8vw, 6.5rem); border-top: 1px solid var(--line); }
.series__head {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: clamp(2.2rem, 5vw, 3.5rem);
}
.series__title { font-size: clamp(2rem, 4.4vw, 3.2rem); line-height: 1.08; letter-spacing: -0.01em; }
.series__intro { color: var(--ink-soft); max-width: 30rem; }

.carousel__track {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 2.5vw, 1.6rem);
}

.card {
  flex: 1 1 calc((100% - 2 * 1.6rem) / 3);
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.card__thumb {
  display: grid; place-items: center;
  background:
    radial-gradient(circle at 50% 38%, #FFFFFF 0%, var(--paper-dim) 100%);
  padding: clamp(1rem, 3vw, 1.8rem);
}
.card__thumb img {
  width: 100%;
  max-width: 250px;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  filter: drop-shadow(0 14px 22px rgba(35, 33, 27, 0.18));
}
.card__body {
  display: flex; flex-direction: column; gap: 0.55rem;
  padding: clamp(1.1rem, 2.5vw, 1.5rem);
  border-top: 1px solid var(--line);
  flex: 1;
}
.card__tag {
  font-family: var(--mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--fern-deep);
}
.card__title { font-family: var(--serif); font-weight: 560; font-size: 1.32rem; line-height: 1.2; letter-spacing: -0.01em; }
.card__desc { color: var(--ink-soft); font-size: 0.95rem; }
.card__foot {
  margin-top: auto;
  padding-top: 0.9rem;
  display: flex; align-items: center; justify-content: space-between; gap: 0.8rem;
}
.card__price { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.06em; white-space: nowrap; }

/* ---------- Why ---------- */
.why { padding-block: clamp(4rem, 8vw, 6.5rem); border-top: 1px solid var(--line); }
.why__grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(2.5rem, 6vw, 5rem); }
.why__title { font-size: clamp(2rem, 4.4vw, 3.2rem); line-height: 1.08; letter-spacing: -0.01em; margin-bottom: 1.5rem; }
.why__main p { color: var(--ink-soft); max-width: 32rem; margin-bottom: 1.1rem; }
.why__main em { color: var(--ink); font-style: italic; }

.why__list { border-top: 1px solid var(--ink); }
.rev-row {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.5rem 0.2rem;
  border-bottom: 1px solid var(--line);
}
.rev-row__k {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.35rem;
  line-height: 1.15;
}
.rev-row__v p { color: var(--ink-soft); margin-bottom: 0.6rem; }
.rev-row__v strong { color: var(--ink); font-weight: 600; }

/* ---------- Blog article ---------- */
.article { padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(3rem, 7vw, 5.5rem); }
.article__in { max-width: 46rem; }
.article__title { font-size: clamp(2.2rem, 5vw, 3.4rem); line-height: 1.08; letter-spacing: -0.015em; margin: 0.8rem 0 0.6rem; }
.article__meta { color: var(--ink-soft); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; margin-bottom: 2rem; }
.article__hero {
  margin: 0 0 2.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #FFFFFF;
}
.article__hero img { width: 100%; height: auto; }
.article__hero figcaption { color: var(--ink-soft); font-size: 0.66rem; letter-spacing: 0.14em; padding: 0.7rem 1rem; border-top: 1px solid var(--line); }
.article__body p { font-size: 1.1rem; line-height: 1.75; color: var(--ink); margin-bottom: 1.4rem; }
.article__foot { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2.5rem; padding-top: 1.8rem; border-top: 1px solid var(--line); }

/* ---------- Closing ---------- */
.closing {
  background: var(--ink);
  color: var(--paper);
  padding-block: clamp(4.5rem, 9vw, 7.5rem);
  border-bottom: 1px solid rgba(251, 249, 244, 0.12);
}
.closing__in { text-align: center; }
.closing__title {
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin-bottom: 1.4rem;
}
.closing__text {
  color: rgba(251, 249, 244, 0.74);
  max-width: 34rem;
  margin: 0 auto 2.2rem;
}
.closing__cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.9rem; }

/* ---------- Footer ---------- */
.sitefoot { background: var(--ink); color: var(--paper); }
.sitefoot__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr) minmax(0, 1fr);
  gap: 2rem;
  padding-block: 3.2rem 2.4rem;
}
.logo--foot { color: var(--paper); }
.logo--foot .logo__img { height: 2.4rem; }
.sitefoot__blurb { color: rgba(251, 249, 244, 0.64); font-size: 0.95rem; max-width: 24rem; margin-top: 0.9rem; }
.sitefoot__nav { display: flex; flex-direction: column; gap: 0.6rem; }
.sitefoot__nav a {
  font-family: var(--mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(251, 249, 244, 0.8);
  text-decoration: none;
}
.sitefoot__nav a:hover { color: var(--marigold); }
.sitefoot__contact { display: flex; flex-direction: column; gap: 0.7rem; justify-content: flex-start; }
.sitefoot__h { margin: 0; font-size: 0.95rem; color: rgba(251, 249, 244, 0.8); }
.sitefoot__h .mono { color: var(--marigold); }
.sitefoot__h .link { color: var(--paper); border-color: rgba(251,249,244,0.3); text-transform: none; }
.sitefoot__h .link:hover { border-color: var(--paper); }
.sitefoot__bar {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  border-top: 1px solid rgba(251, 249, 244, 0.14);
  padding-block: 1.4rem;
  color: rgba(251, 249, 244, 0.5);
  font-size: 0.8rem;
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (min-width: 901px) {
  .hero__grid { row-gap: 0; }
  .hero__copy { grid-column: 1; grid-row: 1; }
  .hero__cta { grid-column: 1; grid-row: 2; }
  .hero__facts { grid-column: 1; grid-row: 3; }
  .hero__panel-wrap { grid-column: 2; grid-row: 1 / 4; }
}
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__copy { order: 1; }
  .hero__panel-wrap { order: 2; }
  .hero__cta { order: 3; margin-bottom: 0; }
  .hero__facts { display: none; }
  .series__head { grid-template-columns: 1fr; align-items: start; }
  .why__grid { grid-template-columns: 1fr; }
  .card { flex-basis: calc((100% - 1.6rem) / 2); }
  .sitefoot__grid { grid-template-columns: 1fr; gap: 1.6rem; }
}
@media (max-width: 820px) {
  .sitehead__nav { display: none; }
  .card { flex-basis: 100%; }
  .card__thumb img { max-width: 340px; }
  .card__title { font-size: 1.5rem; }
  .card__desc { font-size: 1.05rem; }
  .card__price { font-size: 0.9rem; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .sitehead__in { gap: 0.9rem 1.2rem; min-height: 0; padding-block: 0.6rem; }
  .logo__img { height: 2.6rem; }
  .hero__cta .btn { flex: 1 1 100%; justify-content: center; text-align: center; }
  .rev-row { grid-template-columns: 1fr; gap: 0.4rem; }
  .rev-row__k { font-size: 1.2rem; }
  .hero__facts { gap: 0; }
  .hero__fact { flex-basis: 100%; }
  .tin { flex-direction: column; align-items: flex-start; }
  .closing__cta { flex-direction: column; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
}