/* Konzept 10 — „Werkstatt" (Struktur und Strich)
   Berlin modernism: a strict Swiss grid with visible hairline columns,
   registration marks and mono index labels. Through it runs the ONE organic
   element: the hand-drawn ink line (canvas, js/stroke.js).
   Everything mechanical is precise. Only the line is damped and organic. */

:root {
  --paper: #EDE9E0;
  --paper-lift: #F3F0E9;
  --paper-deep: #E4DFD3;
  --ink: #1A1916;
  --ink-2: #38352F;
  --muted: #5F5B52;
  --rule: rgba(26, 25, 22, .16);
  --rule-faint: rgba(26, 25, 22, .088);
  --vermillion: #B5402F;
  --vermillion-deep: #96331F;

  --wrap: 1300px;
  --pad: clamp(1.25rem, 4.2vw, 3.4rem);
  --gap: clamp(.9rem, 1.7vw, 1.6rem);

  --grotesk: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --ease: cubic-bezier(.16, 1, .3, 1);          /* organic settle */
  --ease-mech: cubic-bezier(.62, .02, .16, 1);  /* mechanical, precise */
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.66;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: rgba(181, 64, 47, .17); }

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

/* ============ fixed layers ============ */

.rules { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.rules-wrap {
  height: 100%;
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding-inline: var(--pad);
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gap);
}
.rules-wrap i {
  border-left: 1px solid var(--rule-faint);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .88s var(--ease-mech), border-color .55s var(--ease-mech);
}
.rules-wrap i:last-child { border-right: 1px solid var(--rule-faint); }
body.s-rules .rules-wrap i { transform: none; }

#ink { position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: 1; pointer-events: none; }

.mottle { position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: .85; }
.grain {
  position: fixed; inset: 0; z-index: 2; pointer-events: none;
  mix-blend-mode: soft-light; opacity: .5;
}

/* trim / register marks at the sheet corners */
.trim { position: fixed; inset: 0; z-index: 20; pointer-events: none; opacity: 0; transition: opacity .8s var(--ease-mech); }
body.s-marks .trim { opacity: 1; }
.tm { position: absolute; width: 15px; height: 15px; }
.tm::before, .tm::after { content: ""; position: absolute; background: rgba(26, 25, 22, .32); }
.tm::before { width: 15px; height: 1px; top: 0; }
.tm::after { height: 15px; width: 1px; left: 0; }
.tl { top: 13px; left: 13px; }
.tr { top: 13px; right: 13px; }
.tr::after { left: auto; right: 0; }
.br { bottom: 13px; right: 13px; }
.br::before { top: auto; bottom: 0; }
.br::after { left: auto; right: 0; }
.bl { bottom: 13px; left: 13px; }
.bl::before { top: auto; bottom: 0; }

/* marginal index */
.sideindex {
  position: fixed;
  left: max(14px, calc((100vw - var(--wrap)) / 2 - 30px));
  top: 50%;
  transform: translateY(-50%);
  z-index: 12;
  display: flex; flex-direction: column; gap: .55rem;
  opacity: 0; transition: opacity .9s var(--ease-mech);
}
body.s-marks .sideindex { opacity: 1; }
.sideindex a {
  font: 400 9px/1 var(--mono);
  letter-spacing: .1em;
  color: rgba(95, 91, 82, .72);
  text-decoration: none;
  display: flex; align-items: center; gap: 6px;
  padding: 3px 0;
  transition: color .4s var(--ease-mech);
}
.sideindex a::after {
  content: ""; width: 0; height: 1px; background: var(--ink);
  transition: width .5s var(--ease-mech);
}
.sideindex a:hover { color: var(--ink); }
.sideindex a.on { color: var(--ink); }
.sideindex a.on::after { width: 13px; }
@media (max-width: 1180px) { .sideindex { display: none; } }

main, footer { position: relative; z-index: 3; }

/* ============ brand intro (the load moment) ============ */

/* while the intro runs, the sheet is empty: paper, grain, the twelve column
   rules and the print marks. Nothing of the page yet. */
body.intro main,
body.intro .footer,
body.intro .nav,
body.intro .sideindex,
body.intro #ink { visibility: hidden; }

/* the ring lives on the same layer as the page's line: under the grain */
#introink { position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: 1; pointer-events: none; }

/* the lockup's type sits where page type sits: above the grain */
.intro-lock { position: fixed; inset: 0; z-index: 4; pointer-events: none; }

/* the horizontal register rule the drop aims for */
.intro-rule {
  position: absolute; left: 0; right: 0; height: 1px;
  background: var(--rule);
  transform: scaleX(0); transform-origin: left;
  transition: transform 1.15s var(--ease-mech), opacity .6s var(--ease-mech);
}
body.i-ground .intro-rule { transform: none; }
body.i-ground .trim { opacity: 1; }

.intro-reg {
  position: absolute; width: 26px; height: 26px; margin: -13px 0 0 -13px;
  opacity: 0; transition: opacity .6s var(--ease-mech);
}
body.i-mark .intro-reg { opacity: 1; }
.intro-reg svg { width: 100%; height: 100%; display: block; }
.intro-reg svg circle, .intro-reg svg path {
  fill: none; stroke: rgba(26, 25, 22, .34); stroke-width: 1; vector-effect: non-scaling-stroke;
}

.intro-word {
  position: absolute;
  transform: translateY(-50%);
  font-family: var(--grotesk);
  font-weight: 500;
  font-size: clamp(1.5rem, 2.8vw, 2.7rem);
  line-height: 1;
  letter-spacing: -.034em;
  color: var(--ink);
  white-space: nowrap;
}
.intro-word i {
  display: block; font-style: normal;
  opacity: 0; transform: translateY(15px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
body.i-word .intro-word i { opacity: 1; transform: none; }

/* release: the name hands the page its headline, the rule lets go of the ink */
body.i-release .intro-word i {
  opacity: 0; transform: translateY(-9px);
  transition: opacity .5s var(--ease-mech), transform .8s var(--ease-mech);
}
body.i-release .intro-rule { opacity: 0; }
body.i-release .intro-reg { opacity: 0; transition: opacity .5s var(--ease-mech); }

/* the grid takes the ink back: one precise pulse through the column rules.
   Only through the ones this width actually shows, see the media queries. */
body.i-snap .rules-wrap i { border-left-color: var(--rule); transition: border-color .14s linear; }
@media (max-width: 1080px) {
  body.i-snap .rules-wrap i:nth-child(even) { border-left-color: transparent; }
}
@media (max-width: 760px) {
  body.i-snap .rules-wrap i { border-left-color: transparent; }
  body.i-snap .rules-wrap i:nth-child(4n+1) { border-left-color: var(--rule); }
}

/* skipping is the same release, taken at a run */
body.i-out #introink, body.i-out .intro-lock { opacity: 0; transition: opacity .2s linear; }
body.i-fast [data-appear],
body.i-fast h1 .ln i,
body.i-fast .nav,
body.i-fast .trim,
body.i-fast .sideindex,
body.i-fast .reg-hero,
body.i-fast .secline::before { transition-duration: .24s !important; transition-delay: 0s !important; }

@media (prefers-reduced-motion: reduce) {
  .intro-rule { transform: none; transition: none; }
  .intro-reg { opacity: 1; transition: none; }
  .intro-word i { opacity: 1; transform: none; transition: none; }
}

/* ============ appear choreography ============ */

[data-appear] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .95s var(--ease-mech), transform .95s var(--ease-mech);
}
[data-appear].in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  [data-appear] { opacity: 1; transform: none; transition: none; }
  .rules-wrap i { transform: none; transition: none; }
  .trim, .sideindex { opacity: 1; transition: none; }
}

/* ============ layout ============ */

.wrap {
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding-inline: var(--pad);
}
.sec > .wrap,
.foot-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gap);
}

.sec { padding: clamp(6rem, 15vh, 12rem) 0 0; }
.closing { padding-bottom: clamp(6rem, 14vh, 11rem); }

/* section rule + mono index label */
.secline {
  grid-column: 1 / -1;
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gap);
  align-items: baseline;
  padding-top: .85rem;
  font: 500 10px/1.5 var(--mono);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}
.secline::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: var(--rule);
  transform: scaleX(0); transform-origin: left;
  transition: transform 1.3s var(--ease-mech);
}
.secline.in::before { transform: none; }
@media (prefers-reduced-motion: reduce) { .secline::before { transform: none; transition: none; } }
.secline .idx { grid-column: 1 / span 2; color: var(--ink); }
.secline .idx-name { grid-column: 3 / span 3; }
.secline .idx-right { grid-column: 9 / span 4; text-align: right; }

/* registration mark */
.reg { display: block; width: 22px; height: 22px; }
.reg svg { width: 100%; height: 100%; display: block; }
.reg svg circle, .reg svg path { fill: none; stroke: rgba(26, 25, 22, .3); stroke-width: 1; vector-effect: non-scaling-stroke; }

/* ============ nav ============ */

.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 11;
  display: flex; align-items: center; justify-content: space-between;
  gap: 2rem;
  padding: 1.05rem clamp(1.25rem, 4.2vw, 3.4rem);
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  transform: translateY(-101%);
  transition: transform .95s var(--ease-mech);
}
body.s-labels .nav { transform: none; }
@media (prefers-reduced-motion: reduce) { .nav { transform: none; transition: none; } }
.brand {
  font-family: var(--grotesk);
  font-weight: 500; font-size: .96rem;
  letter-spacing: -.015em;
  color: var(--ink); text-decoration: none;
  padding: .35rem 0;
}
.nav-right { display: flex; align-items: center; gap: clamp(1.5rem, 3.4vw, 3rem); }
.nav-links { display: flex; gap: clamp(1.3rem, 2.6vw, 2.4rem); }
.nav-links a, .nav-cta {
  font: 500 10px/1 var(--mono);
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted); text-decoration: none;
  padding: 1.05rem 0; display: inline-flex; align-items: center;
  transition: color .35s var(--ease-mech);
}
.nav-links a:hover { color: var(--ink); }
.nav-cta { color: var(--ink); gap: .5rem; }
.nav-cta .dot { width: 6px; height: 6px; background: var(--vermillion); display: block; }

/* ============ shared type ============ */

h2 {
  grid-column: 1 / span 8;
  font-family: var(--grotesk);
  font-weight: 500;
  font-size: clamp(2rem, 4.1vw, 3.5rem);
  line-height: 1.02;
  letter-spacing: -.03em;
  margin-top: clamp(2.6rem, 5.5vh, 4.4rem);
  text-wrap: balance;
}
.h2-lg {
  grid-column: 1 / span 10;
  font-size: clamp(2.5rem, 6vw, 5.4rem);
  line-height: .96;
  letter-spacing: -.035em;
}
h3 {
  font-family: var(--grotesk);
  font-weight: 500;
  font-size: 1.18rem;
  line-height: 1.22;
  letter-spacing: -.018em;
  margin-bottom: .6rem;
}
.eyebrow {
  font: 500 10px/1.5 var(--mono);
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted);
}
.mono-note {
  font: 400 10.5px/1.7 var(--mono);
  letter-spacing: .06em;
  color: var(--muted);
}
.section-intro {
  grid-column: 1 / span 5;
  margin-top: 1.5rem;
  color: var(--ink-2);
  font-size: 1.02rem;
}
.text-link {
  color: var(--ink); text-decoration: none;
  border-bottom: 1px solid rgba(26, 25, 22, .34);
  padding-bottom: .12em;
  transition: border-color .35s var(--ease-mech);
}
.text-link:hover { border-color: var(--ink); }
.more { font-size: .94rem; }

.btn {
  display: inline-flex; align-items: center;
  min-height: 46px; padding: 0 1.7rem;
  background: var(--ink); color: var(--paper);
  text-decoration: none;
  font: 500 .9rem/1 var(--sans);
  letter-spacing: .005em;
  transition: background .35s var(--ease-mech);
}
.btn:hover { background: #000; }
.link-quiet {
  display: inline-flex; align-items: center; min-height: 46px;
  color: var(--muted); font-size: .9rem; text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .35s var(--ease-mech), border-color .35s var(--ease-mech);
}
.link-quiet:hover { color: var(--ink); border-color: var(--rule); }

/* ============ 00 hero ============ */

.hero { position: relative; }
.hero-inner {
  min-height: 100svh;
  padding-top: clamp(5rem, 9vh, 7rem);
  padding-bottom: clamp(2.5rem, 6vh, 4.5rem);
  display: flex;
  flex-direction: column;
  position: relative;
}
.hero-block { grid-column: 1 / -1; margin-top: auto; display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--gap); }
.hero-block .eyebrow { grid-column: 1 / span 7; margin-bottom: clamp(1.6rem, 3.4vh, 2.6rem); }

/* the register mark sits exactly on grid line 8, one press-sheet mark on empty paper */
.reg-hero {
  grid-column: 9; grid-row: 2;
  margin: clamp(4.5rem, 13vh, 9rem) 0 0 -11px;
  opacity: 0;
  transition: opacity .9s var(--ease-mech);
}
body.s-marks .reg-hero { opacity: 1; }

h1 {
  grid-column: 1 / span 12;
  font-family: var(--grotesk);
  font-weight: 500;
  font-size: clamp(2.8rem, 7.4vw, 7.1rem);
  line-height: .95;
  letter-spacing: -.042em;
}
h1 .ln { display: block; overflow: hidden; padding-bottom: .14em; margin-bottom: -.14em; }
h1 .ln i {
  display: block; font-style: normal;
  transform: translateY(118%);
  transition: transform 1.15s var(--ease-mech);
}
body.s-title h1 .ln:nth-child(1) i { transform: none; }
body.s-title h1 .ln:nth-child(2) i { transform: none; transition-delay: .11s; }
@media (prefers-reduced-motion: reduce) { h1 .ln i { transform: none; transition: none; } }

.hero-foot {
  grid-column: 1 / span 12;
  margin-top: clamp(4.4rem, 10vh, 8rem);
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gap);
  row-gap: clamp(1.8rem, 3.6vh, 2.8rem);
  align-items: start;
}
.lead {
  grid-column: 1 / span 5; grid-row: 1;
  font-family: var(--grotesk);
  font-weight: 400;
  font-size: clamp(1.02rem, 1.28vw, 1.22rem);
  line-height: 1.46;
  letter-spacing: -.012em;
  color: var(--ink-2);
}
.hero-side { grid-column: 7 / span 3; grid-row: 1; display: flex; flex-direction: column; gap: 1.1rem; padding-top: .2rem; }
.hero-ctas { grid-column: 1 / span 5; grid-row: 2; display: flex; align-items: center; gap: 1.8rem; }
.scroll-hint {
  margin-top: clamp(1.4rem, 3vh, 2.2rem);
  font: 400 9.5px/1 var(--mono);
  letter-spacing: .22em; text-transform: uppercase;
  color: rgba(95, 91, 82, .7);
}

/* ============ 01 methode ============ */

/* the headline sits right of the grid's middle so the descending stroke
   keeps a clean lane on the left. Swiss asymmetry, not decoration. */
.method .h2-lg { grid-column: 4 / span 9; }
.ink-lane { grid-column: 1 / -1; height: clamp(78px, 11vh, 128px); }
.method-cols {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--gap);
  color: var(--ink-2);
}
.method-cols p:nth-child(1) { grid-column: 4 / span 4; }
.method-cols p:nth-child(2) { grid-column: 9 / span 4; }
.method .more { grid-column: 4 / span 4; margin-top: 2.6rem; }

/* ============ 02 kurse ============ */

.cards {
  grid-column: 1 / -1;
  margin-top: clamp(3.4rem, 7vh, 5.5rem);
  display: grid; grid-template-columns: repeat(3, 1fr); column-gap: var(--gap);
}
.card { border-top: 1px solid var(--rule); padding-top: 1.15rem; }
.card-idx {
  display: block;
  font: 500 10px/1 var(--mono);
  letter-spacing: .16em;
  color: var(--muted);
  margin-bottom: clamp(2.6rem, 6vh, 4.6rem);
}
.card h3 { margin-bottom: .8rem; }
.card p { color: var(--ink-2); font-size: .95rem; margin-bottom: 1.5rem; }
.card .text-link { font-size: .9rem; }

/* ============ 03 krankenkasse ============ */

.zpp-head { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--gap); }
.zpp-head h2 { grid-column: 1 / span 7; }
.zpp-steps {
  grid-column: 3 / span 8;
  list-style: none;
  margin-top: clamp(4.5rem, 9vh, 7rem);
}
.zpp-step {
  display: grid;
  grid-template-columns: 92px 1fr;
  column-gap: var(--gap);
  padding: 1.9rem 0 1.9rem 72px;
  border-top: 1px solid var(--rule);
}
.zpp-step:last-child { border-bottom: 1px solid var(--rule); }
.step-num {
  font-family: var(--grotesk); font-weight: 500;
  font-size: 2.1rem; line-height: .9;
  letter-spacing: -.03em;
  color: rgba(26, 25, 22, .4);
  font-variant-numeric: lining-nums;
}
.step-body h3 { font-size: 1.16rem; }
.step-body p { color: var(--ink-2); font-size: .95rem; }
.zpp-foot {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--gap);
  margin-top: clamp(2.6rem, 5vh, 4rem);
  row-gap: 1.6rem;
}
.disclaimer {
  grid-column: 3 / span 6;
  font: 400 11.5px/1.75 var(--mono);
  letter-spacing: .01em;
  color: var(--muted);
}
.zpp-foot .more { grid-column: 10 / span 3; align-self: end; text-align: right; }

/* ============ 04 praxis / ensō ============ */

.enso-field {
  grid-column: 1 / -1;
  position: relative;
  margin-top: clamp(4.5rem, 10vh, 8rem);
  display: grid; place-items: center;
}
.enso-rule { position: absolute; left: 0; right: 0; top: 50%; height: 1px; background: var(--rule); }
.enso-wrap {
  position: relative;
  width: min(560px, 74vw);
  aspect-ratio: 1;
  display: grid; place-items: center;
}
.reg-enso { position: absolute; top: 50%; }
.reg-enso.l { left: 9px; transform: translate(-50%, -50%); }
.reg-enso.r { right: 9px; transform: translate(50%, -50%); }
.enso-statement {
  font-family: var(--grotesk);
  font-weight: 500;
  font-size: clamp(1.4rem, 2.7vw, 2.3rem);
  line-height: 1.34;
  letter-spacing: -.028em;
  text-align: center;
  max-width: 80%;
}
.points {
  grid-column: 1 / -1;
  margin-top: clamp(3.5rem, 8vh, 6rem);
  display: grid; grid-template-columns: repeat(3, 1fr); column-gap: var(--gap);
}
.point { border-top: 1px solid var(--rule); padding-top: 1.15rem; }
.point .card-idx { margin-bottom: clamp(1.8rem, 4vh, 3rem); }
.point h3 { font-size: 1.06rem; }
.point p { color: var(--ink-2); font-size: .93rem; }

/* ============ 05 lehrer ============ */

.about-grid {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--gap);
  margin-top: clamp(3rem, 6vh, 4.6rem);
  align-items: start;
}
/* the wall behind the portrait multiplies into the paper, so the figure
   stands on the sheet instead of inside a white box */
.portrait { grid-column: 1 / span 4; background: var(--paper); }
.portrait img {
  width: 100%; height: auto; display: block;
  filter: grayscale(1) contrast(1.16) brightness(1.13);
  mix-blend-mode: multiply;
}
.portrait figcaption {
  margin-top: .9rem;
  padding-top: .6rem;
  border-top: 1px solid var(--rule);
  font: 400 10px/1.5 var(--mono);
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted);
}
.about-main { grid-column: 6 / span 7; }
.about-main h2 { grid-column: auto; margin-top: 0; font-size: clamp(1.9rem, 3.5vw, 3rem); }
.about-text { margin-top: 1.9rem; color: var(--ink-2); max-width: 40em; }
.about-quote {
  margin-top: 2.6rem;
  padding-left: 2.4rem;
}
.about-quote p {
  font-family: var(--grotesk); font-weight: 400;
  font-size: clamp(1.15rem, 1.9vw, 1.55rem);
  line-height: 1.38; letter-spacing: -.022em;
}
.about-main .more { margin-top: 2.2rem; }

.creds {
  grid-column: 6 / span 7;
  margin-top: clamp(3rem, 6vh, 4.6rem);
}
.creds-label {
  font: 500 10px/1 var(--mono);
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 1rem;
}
.creds ul { list-style: none; columns: 2; column-gap: var(--gap); }
.creds li {
  break-inside: avoid;
  display: flex; gap: .95rem;
  padding: .8rem 0;
  border-top: 1px solid var(--rule);
  font-size: .89rem; line-height: 1.5;
  color: var(--ink-2);
}
.creds li span { font: 400 10px/1.9 var(--mono); color: var(--muted); letter-spacing: .08em; }

/* ============ 06 abschluss ============ */

.closing-grid {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--gap);
  margin-top: clamp(3rem, 6vh, 4.6rem);
  align-items: start;
}
.closing-left { grid-column: 1 / span 6; }
.closing-left .h2-lg { grid-column: auto; margin-top: 0; font-size: clamp(2.3rem, 4.5vw, 4.1rem); }
.closing-text { margin-top: clamp(2.4rem, 5vh, 3.6rem); color: var(--ink-2); max-width: 28em; }
.closing-alt { margin-top: 2.2rem; font-size: .9rem; color: var(--muted); }

.closing-right { grid-column: 8 / span 5; position: relative; }
.redblock {
  background: var(--vermillion);
  color: var(--paper-lift);
  padding: clamp(1.8rem, 3vw, 2.6rem);
  min-height: clamp(340px, 50vh, 520px);
  display: flex; flex-direction: column;
}
.red-label {
  font: 500 10px/1 var(--mono);
  letter-spacing: .16em; text-transform: uppercase;
  color: #FBF7EF;
}
.red-lead {
  margin-top: auto;
  font-family: var(--grotesk); font-weight: 500;
  font-size: clamp(1.35rem, 2.1vw, 1.85rem);
  line-height: 1.16; letter-spacing: -.028em;
  color: #FBF7EF;
  max-width: 13em;
}
.btn-red {
  margin-top: 1.9rem;
  display: inline-flex; align-items: center; justify-content: space-between;
  min-height: 50px; padding: 0 1.3rem;
  background: #FBF7EF; color: var(--vermillion-deep);
  text-decoration: none;
  font: 500 .9rem/1 var(--sans);
  align-self: stretch;
  transition: background .35s var(--ease-mech), color .35s var(--ease-mech);
}
.btn-red::after { content: "→"; font-size: 1rem; }
.btn-red:hover { background: var(--ink); color: #FBF7EF; }

/* stamped exactly on the red block's lower-left corner: ink over red over paper */
.seal {
  position: absolute;
  left: -39px; bottom: -39px;
  width: 78px; height: 78px;
  opacity: 0; transform: scale(.9) rotate(-5deg);
  transition: opacity .75s var(--ease), transform .75s var(--ease);
}
.seal.in { opacity: 1; transform: rotate(-1.8deg); }
@media (prefers-reduced-motion: reduce) { .seal { opacity: 1; transform: rotate(-1.8deg); transition: none; } }
.seal svg { width: 100%; height: 100%; display: block; }
.seal svg path { fill: var(--ink); }
.seal-glyph {
  font-family: "Hiragino Sans", "Hiragino Mincho ProN", "Noto Sans SC", sans-serif;
  font-size: 33px; fill: var(--paper); text-anchor: middle;
}

/* ============ footer ============ */

.footer {
  margin-top: clamp(4rem, 9vh, 7rem);
  border-top: 1px solid var(--rule);
  padding: clamp(2.4rem, 5vh, 3.6rem) 0 clamp(2rem, 4vh, 3rem);
}
.foot-grid { align-items: start; row-gap: 2rem; }
.foot-brand { grid-column: 1 / span 4; }
.foot-name { font-family: var(--grotesk); font-weight: 500; font-size: 1rem; letter-spacing: -.015em; }
.foot-line { margin-top: .5rem; font: 400 10.5px/1.7 var(--mono); letter-spacing: .05em; color: var(--muted); }
.foot-links { grid-column: 6 / span 3; display: flex; flex-direction: column; gap: .1rem; }
.foot-links a {
  font: 400 10px/1 var(--mono);
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted); text-decoration: none;
  padding: .55rem 0;
  transition: color .35s var(--ease-mech);
}
.foot-links a:hover { color: var(--ink); }
.foot-marks { grid-column: 10 / span 3; }
.mono-cap { font: 500 9.5px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.mono-cap.dim { color: rgba(95, 91, 82, .62); }
.swatches { display: flex; gap: 5px; margin: .7rem 0; }
.sw { width: 22px; height: 12px; display: block; }
.sw-paper { background: var(--paper-lift); border: 1px solid var(--rule); }
.sw-ink { background: var(--ink); }
.sw-red { background: var(--vermillion); }
.foot-note {
  width: min(100%, var(--wrap)); margin-inline: auto; padding-inline: var(--pad);
  margin-top: clamp(2.4rem, 5vh, 3.6rem);
  font: 400 9.5px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase;
  color: rgba(95, 91, 82, .58);
}

/* ============ responsive ============ */

@media (max-width: 1080px) {
  .rules-wrap i:nth-child(even) { border-left-color: transparent; }
  h1 { font-size: clamp(2.8rem, 8.2vw, 5.4rem); }
  .lead { grid-column: 1 / span 6; }
  .hero-side { grid-column: 8 / span 5; }
  .hero-ctas { grid-column: 1 / span 8; flex-direction: row; align-items: center; gap: 1.6rem; }
  .method .h2-lg { grid-column: 3 / span 10; }
  .method-cols p:nth-child(1) { grid-column: 3 / span 5; }
  .method-cols p:nth-child(2) { grid-column: 8 / span 5; }
  .method .more { grid-column: 3 / span 5; }
  .zpp-steps { grid-column: 2 / span 10; }
  .about-main { grid-column: 6 / span 7; }
  .creds { grid-column: 1 / -1; }
  .closing-left { grid-column: 1 / span 7; }
  .closing-right { grid-column: 8 / span 5; }
}

@media (max-width: 760px) {
  .rules-wrap i:nth-child(n) { border-left-color: transparent; }
  .rules-wrap i:nth-child(4n+1) { border-left-color: var(--rule-faint); }
  .rules-wrap i:last-child { border-right-color: transparent; }

  .nav-links { display: none; }
  .nav { padding: .8rem 1.25rem; }

  .sec { padding-top: clamp(4.5rem, 11vh, 7rem); }

  .secline .idx { grid-column: 1 / span 3; }
  .secline .idx-name { grid-column: 4 / span 4; }
  .secline .idx-right { grid-column: 8 / span 5; }

  .hero-inner { padding-top: 5.5rem; }
  .hero-block .eyebrow { grid-column: 1 / -1; }
  h1 { font-size: clamp(2.35rem, 10.4vw, 3.6rem); letter-spacing: -.035em; }
  .reg-hero { display: none; }
  .hero-foot { margin-top: clamp(2.8rem, 8vh, 4rem); row-gap: 1.6rem; }
  .lead, .hero-side, .hero-ctas, .scroll-hint { grid-column: 1 / -1; grid-row: auto; }
  .hero-side { flex-direction: row; gap: 1.8rem; flex-wrap: wrap; }
  .hero-ctas { flex-direction: column; align-items: flex-start; gap: .2rem; }
  .scroll-hint { display: none; }

  h2, .h2-lg, .method .h2-lg, .zpp-head h2 { grid-column: 1 / -1; }
  .h2-lg { font-size: clamp(2.1rem, 9vw, 3.2rem); }
  .section-intro { grid-column: 1 / -1; }

  .ink-lane { height: 58px; }
  .method-cols p:nth-child(1), .method-cols p:nth-child(2) { grid-column: 1 / -1; }
  .method-cols { row-gap: 1.3rem; }
  .method .more { grid-column: 1 / -1; }

  .cards, .points { grid-template-columns: 1fr; row-gap: 0; }
  .card, .point { padding: 1.15rem 0 2rem; }
  .card:last-child, .point:last-child { border-bottom: 1px solid var(--rule); }
  .card-idx { margin-bottom: 1.4rem; }

  .zpp-steps { grid-column: 1 / -1; }
  .zpp-step { grid-template-columns: 54px 1fr; padding-left: 40px; padding-block: 1.5rem; }
  .step-num { font-size: 1.6rem; }
  .disclaimer { grid-column: 1 / -1; font-size: 11px; }
  .zpp-foot .more { grid-column: 1 / -1; text-align: left; }

  .enso-wrap { width: min(420px, 84vw); }
  .enso-statement { font-size: clamp(1.15rem, 5.6vw, 1.6rem); max-width: 90%; }

  .portrait { grid-column: 1 / span 8; }
  .about-main, .creds { grid-column: 1 / -1; margin-top: 2.6rem; }
  .creds ul { columns: 1; }

  .closing-left, .closing-right { grid-column: 1 / -1; }
  .closing-right { margin-top: 3.2rem; }
  .redblock { min-height: 260px; }
  .seal { left: auto; right: 10px; bottom: -32px; width: 62px; height: 62px; }

  .foot-brand { grid-column: 1 / -1; }
  .foot-links { grid-column: 1 / span 6; }
  .foot-marks { grid-column: 8 / span 5; }
}

@media (max-width: 560px) {
  /* the right-hand caption would wrap; the index label carries the section alone */
  .secline .idx-right { display: none; }
  .secline .idx { grid-column: 1 / span 4; }
  .secline .idx-name { grid-column: 5 / span 8; }
}

@media (max-width: 420px) {
  .tm { width: 11px; height: 11px; }
  .tm::before { width: 11px; }
  .tm::after { height: 11px; }
}