/* ============================================================================
   Cybersolar core: chrome, the living file (rail), hero, close, footer, and
   the shared vocabulary every chapter module uses.
   ========================================================================== */

html { background: var(--sc-canvas); }
body {
  background: var(--sc-canvas);
  color: var(--sc-ink);
  transition: background-color var(--theme-dur) var(--ease-out), color var(--theme-dur) var(--ease-out);
}
.sc-grain { opacity: var(--grain-op); z-index: 70; mix-blend-mode: multiply; }
:root[data-theme="night"] .sc-grain { mix-blend-mode: screen; }

h1, h2, h3, .display {
  font-family: var(--sc-font-display);
  font-optical-sizing: auto;
  font-weight: 440;
  letter-spacing: -0.022em;
  line-height: 1.02;
  text-wrap: balance;
  margin: 0;
}
:root[data-theme="night"] :is(h1, h2, h3, .display) { font-weight: 420; letter-spacing: -0.016em; }
em { font-style: italic; }
p { margin: 0; text-wrap: pretty; }
a { color: inherit; }

.skip {
  position: fixed; left: 1rem; top: 1rem; z-index: 200;
  padding: 0.6rem 0.9rem; border-radius: var(--sc-r-md);
  background: var(--sc-accent); color: var(--sc-accent-ink);
  transform: translateY(-200%); transition: transform 160ms var(--ease-out);
}
.skip:focus-visible { transform: none; }

.only-night { display: none !important; }
:root[data-theme="night"] .only-night { display: revert !important; }
:root[data-theme="night"] .only-day { display: none !important; }

/* ------------------------------------------------------ shared vocabulary -- */

/* A chapter: sits to the right of the rail on desktop. Grounds are painted per
   chapter (the grammar forbids interpolated drift). */
.ch { position: relative; background: var(--ground, var(--sc-canvas)); color: var(--sc-ink);
      transition: background-color var(--theme-dur) var(--ease-out), color var(--theme-dur) var(--ease-out); }
.ch--paper  { --ground: var(--sc-canvas); }
.ch--deep   { --ground: var(--ground-2); }
.ch--inv    { --ground: var(--ground-inv); --sc-ink: var(--ink-inv); --sc-ink-soft: var(--ink-inv-soft);
              --rule: color-mix(in oklab, var(--ink-inv) 14%, transparent); --rule-strong: color-mix(in oklab, var(--ink-inv) 30%, transparent);
              --hatch: color-mix(in oklab, var(--ink-inv) 9%, transparent); color: var(--sc-ink); }
.ch__inner  { padding: clamp(5rem, 11vh, 9rem) var(--content-r) clamp(5rem, 11vh, 9rem) var(--content-l); }

.ch__h  { font-size: var(--t-h2); max-width: 17ch; }
.ch__h em, .close__h em { font-weight: 400; color: var(--accent-deep); }
:root[data-theme="night"] :is(.ch__h, .close__h) em, .ch--inv .ch__h em { color: var(--sc-accent); }
:is(.ch__h, .close__h) + .lede { margin-top: 1.25rem; }
.ch__h3 { font-size: var(--t-h3); line-height: 1.12; letter-spacing: -0.012em; }
.lede   { font-size: clamp(1.1rem, 1rem + 0.35vw, 1.3rem); line-height: 1.5; color: var(--sc-ink-soft); max-width: 44ch; }
.body   { font-size: 1rem; line-height: 1.62; color: var(--sc-ink-soft); max-width: 62ch; }
.mono   { font-family: var(--sc-font-mono); font-size: 0.8125rem; letter-spacing: 0.01em; }
.label  { font-family: var(--sc-font-mono); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.09em; text-transform: uppercase; color: var(--sc-ink-soft); }
.accent-text { color: var(--accent-deep); }

/* Bracket frame: four corner ticks instead of a border (instrument panel). */
.bracket { position: relative; padding: 1rem 1.1rem; }
.bracket::before, .bracket::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  --t: 9px; --c: var(--rule-strong);
  background:
    linear-gradient(var(--c), var(--c)) top left / var(--t) 1px no-repeat,
    linear-gradient(var(--c), var(--c)) top left / 1px var(--t) no-repeat,
    linear-gradient(var(--c), var(--c)) top right / var(--t) 1px no-repeat,
    linear-gradient(var(--c), var(--c)) top right / 1px var(--t) no-repeat;
}
.bracket::after {
  background:
    linear-gradient(var(--c), var(--c)) bottom left / var(--t) 1px no-repeat,
    linear-gradient(var(--c), var(--c)) bottom left / 1px var(--t) no-repeat,
    linear-gradient(var(--c), var(--c)) bottom right / var(--t) 1px no-repeat,
    linear-gradient(var(--c), var(--c)) bottom right / 1px var(--t) no-repeat;
}

/* A monochrome engraving recoloured by theme: the asset is an alpha mask. */
.engr {
  display: block;
  background-color: var(--engr-ink, var(--sc-ink));
  -webkit-mask: var(--src) center / contain no-repeat;
          mask: var(--src) center / contain no-repeat;
  transition: background-color var(--theme-dur) var(--ease-out);
}

/* Status chip: "corre solo" and friends. */
.chip {
  display: inline-flex; align-items: center; gap: 0.45em;
  font-family: var(--sc-font-mono); font-size: 0.72rem; letter-spacing: 0.04em;
  padding: 0.28em 0.6em; border-radius: var(--sc-r-sm);
  border: 1px solid var(--rule); color: var(--sc-ink-soft); background: color-mix(in oklab, var(--sc-surface) 70%, transparent);
  white-space: nowrap;
}
.chip--run { color: var(--signal); border-color: color-mix(in oklab, var(--signal) 40%, transparent); }
.chip--run::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ------------------------------------------------------------- buttons -- */
.cta {
  --b: var(--sc-ink);
  display: inline-flex; align-items: center; gap: 0.6rem;
  height: 2.9rem; padding: 0 1.15rem 0 1.25rem;
  border-radius: var(--sc-r-md);
  background: var(--action); color: var(--action-ink);
  font: 550 0.98rem/1 var(--sc-font-text); letter-spacing: -0.005em;
  text-decoration: none; white-space: nowrap;
  box-shadow: 0 1px 0 color-mix(in oklab, var(--action) 60%, black) , 0 6px 16px -8px hsl(var(--sc-shadow-color) / 0.55), var(--sc-edge);
  transition: transform 140ms var(--ease-out), background-color 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
}
.cta svg { width: 1rem; height: 1rem; transition: transform 180ms var(--ease-out); }
@media (hover: hover) and (pointer: fine) {
  .cta:hover { background: var(--action-hover); }
  .cta:hover svg { transform: translateX(3px); }
}
.cta:active { transform: translateY(1px) scale(0.985); }
.cta--small { height: 2.35rem; padding: 0 0.85rem 0 0.95rem; font-size: 0.9rem; }

.link {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font: 500 0.95rem/1 var(--sc-font-text); color: var(--sc-ink);
  text-decoration: underline; text-decoration-color: var(--rule-strong);
  text-underline-offset: 0.35em; text-decoration-thickness: 1px;
  transition: text-decoration-color 160ms var(--ease-out);
}
.link:hover { text-decoration-color: currentColor; }

/* -------------------------------------------------------------- chrome -- */
.chrome {
  position: fixed; top: 0; right: 0; z-index: 90;
  height: var(--chrome-h); display: flex; align-items: center; gap: 0.75rem;
  padding: 0 var(--content-r) 0 1rem;
  pointer-events: none;
}
.chrome > * { pointer-events: auto; }

/* The day/night dial. A horizon in a window: the sun sets, the moon rises. */
.dial {
  display: inline-flex; align-items: center; gap: 0.6rem;
  height: 2.35rem; padding: 0 0.8rem 0 0.35rem;
  border: 1px solid var(--rule-strong); border-radius: var(--sc-r-md);
  background: color-mix(in oklab, var(--sc-surface) 94%, transparent);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  color: var(--sc-ink); cursor: pointer;
  font: 500 0.82rem/1 var(--sc-font-mono); letter-spacing: 0.03em;
  transition: border-color 160ms var(--ease-out), background-color var(--theme-dur) var(--ease-out);
}
.dial:hover { border-color: var(--sc-ink-soft); }
.dial__win {
  position: relative; width: 1.7rem; height: 1.7rem; border-radius: var(--sc-r-sm);
  overflow: hidden; background: color-mix(in oklab, var(--sc-accent) 16%, var(--sc-surface));
  transition: background-color var(--theme-dur) var(--ease-out);
}
:root[data-theme="night"] .dial__win { background: color-mix(in oklab, var(--signal) 12%, var(--sc-canvas)); }
.dial__wheel {
  position: absolute; left: 50%; top: 72%; width: 2.4rem; height: 2.4rem; margin: -1.2rem 0 0 -1.2rem;
  transition: transform var(--theme-dur) var(--ease-io);
}
:root[data-theme="night"] .dial__wheel { transform: rotate(180deg); }
.dial__sun, .dial__moon { position: absolute; left: 50%; width: 0.72rem; height: 0.72rem; margin-left: -0.36rem; border-radius: 50%; }
.dial__sun { top: 0.12rem; background: var(--human); box-shadow: 0 0 0 2px color-mix(in oklab, var(--human) 28%, transparent); }
.dial__moon { bottom: 0.12rem; transform: rotate(180deg); background: transparent; box-shadow: inset -0.2rem 0.05rem 0 0 var(--human); }
.dial__hz { position: absolute; left: 0; right: 0; top: 72%; height: 1px; background: var(--sc-ink-soft); }
.dial__label { position: relative; height: 1em; overflow: hidden; min-width: 3.3em; }
.dial__label span { display: block; transition: transform var(--theme-dur) var(--ease-io); }
:root[data-theme="night"] .dial__label span { transform: translateY(-100%); }

/* Brand: the initials JMH in the display face (Jesús, 2-oct-2026). No symbol. */
.mark {
  flex: none; color: var(--sc-ink);
  font: 600 1.45rem/1 var(--sc-font-display); letter-spacing: -0.01em;
  font-variant-numeric: lining-nums;
}

/* ------------------------------------------------ the living file (rail) -- */
@property --rail-gt { syntax: "<color>"; inherits: true; initial-value: transparent; }
@property --rail-gb { syntax: "<color>"; inherits: true; initial-value: transparent; }
.rail {
  position: fixed; left: 0; top: 0; bottom: 0; z-index: 80;
  width: var(--rail-w);
  display: flex; flex-direction: column;
  padding: 1.15rem 1.1rem 1.25rem 1.35rem;
  color: var(--sc-ink);
  isolation: isolate;
}
/* The rail's ground follows the chapters under it, in two stretches split
   where the next chapter begins, so it never lays a band of the wrong world
   over half a chapter. */
.rail::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    linear-gradient(90deg, color-mix(in oklab, var(--rail-gt) 92%, transparent) 0%, color-mix(in oklab, var(--rail-gt) 78%, transparent) 70%, transparent 100%) top / 100% var(--rail-split, 100%) no-repeat,
    linear-gradient(90deg, color-mix(in oklab, var(--rail-gb) 92%, transparent) 0%, color-mix(in oklab, var(--rail-gb) 78%, transparent) 70%, transparent 100%) bottom / 100% calc(100% - var(--rail-split, 100%)) no-repeat;
}
/* Each block of the rail takes the tone of the chapter directly beside it. */
.rail [data-tone="dark"] {
  --sc-ink: #E4EDE6; --sc-ink-soft: #A7B9AE;
  --rule: color-mix(in oklab, #E4EDE6 14%, transparent);
  --rule-strong: color-mix(in oklab, #E4EDE6 30%, transparent);
  --rail-dot: #0C2327;
  color: var(--sc-ink);
}
.rail [data-tone="light"] {
  --sc-ink: #12261A; --sc-ink-soft: #465849;
  --rule: color-mix(in oklab, #12261A 14%, transparent);
  --rule-strong: color-mix(in oklab, #12261A 28%, transparent);
  --rail-dot: #EDF0E2;
  color: var(--sc-ink);
}
.rail .fl a::before { background: var(--rail-dot, var(--sc-canvas)); }
/* Over an image chapter (no painted ground) the text carries its own halo. */
.rail [data-bare][data-tone="light"] { --sc-ink-soft: #33463A; text-shadow: 0 0 7px rgb(237 240 226 / 0.9), 0 0 2px rgb(237 240 226 / 0.9); }
.rail [data-bare][data-tone="dark"] { text-shadow: 0 0 7px rgb(2 15 17 / 0.85), 0 0 2px rgb(2 15 17 / 0.85); }
.rail__brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; color: var(--sc-ink); margin-bottom: 2.1rem; }
.rail__name { font: 500 1rem/1.05 var(--sc-font-display); white-space: nowrap; letter-spacing: -0.01em; }
.rail__name small { display: block; margin-top: 0.3rem; font: 400 0.68rem/1.2 var(--sc-font-mono); letter-spacing: 0.05em; color: var(--sc-ink-soft); }

.file { position: relative; flex: 1; min-height: 0; display: flex; flex-direction: column; }
.file__tab {
  position: relative; white-space: nowrap;
  display: flex; align-items: center; gap: 0.5rem;
  font: 500 0.74rem/1 var(--sc-font-mono); color: var(--sc-ink);
  padding-bottom: 0.7rem; border-bottom: 1px solid var(--rule); margin-bottom: 0.9rem;
}
.file__tab::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 3px color-mix(in oklab, var(--signal) 18%, transparent); }
.file__saved { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.file.is-saving .file__tab::before { animation: saved 1.2s var(--ease-out) 1; }
@keyframes saved { 0% { box-shadow: 0 0 0 3px color-mix(in oklab, var(--signal) 18%, transparent); } 35% { box-shadow: 0 0 0 7px color-mix(in oklab, var(--signal) 30%, transparent); } 100% { box-shadow: 0 0 0 3px color-mix(in oklab, var(--signal) 18%, transparent); } }
.file__h { font: 500 0.8rem/1.4 var(--sc-font-mono); color: var(--sc-ink); margin: 0 0 0.55rem; }
.file__lines { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.1rem; position: relative; }
.file__lines::before { /* the spine the active dot rides on */
  content: ""; position: absolute; left: 3px; top: 0.6rem; bottom: 0.6rem; width: 1px; background: var(--rule);
}
.fl a {
  position: relative; display: block; padding: 0.34rem 0 0.34rem 1.05rem;
  font: 400 0.76rem/1.42 var(--sc-font-mono); color: var(--sc-ink-soft);
  text-decoration: none; border-radius: var(--sc-r-sm);
  transition: color 200ms var(--ease-out);
}
.fl a::before { /* the dot */
  content: ""; position: absolute; left: 0; top: 0.72rem; width: 7px; height: 7px; border-radius: 50%;
  background: var(--sc-canvas); border: 1px solid var(--rule-strong);
  transition: background-color 220ms var(--ease-out), border-color 220ms var(--ease-out), box-shadow 220ms var(--ease-out);
}
.fl__k { color: var(--sc-ink); }
.fl__v { color: var(--sc-ink-soft); }
.fl__ghost { display: none; color: color-mix(in oklab, var(--sc-ink-soft) 55%, transparent); letter-spacing: 0.08em; }
.js .fl:not(.is-written) .fl__v { display: none; }
.js .fl:not(.is-written) .fl__ghost { display: inline; }
.js .fl:not(.is-written) .fl__k { color: color-mix(in oklab, var(--sc-ink-soft) 70%, transparent); }
.fl.is-written a::before { background: var(--sc-ink-soft); border-color: var(--sc-ink-soft); }
.fl.is-active a { color: var(--sc-ink); }
.fl.is-active a::before { background: var(--sc-accent); border-color: var(--accent-deep); box-shadow: 0 0 0 4px color-mix(in oklab, var(--sc-accent) 22%, transparent); }
.fl.is-typing .fl__v::after, .file__caret {
  content: ""; display: inline-block; width: 0.5em; height: 1.05em; margin-left: 1px; vertical-align: -0.18em;
  background: var(--sc-accent); animation: caret 1s steps(1) infinite;
}
@keyframes caret { 50% { opacity: 0; } }
.fl--auto .fl__k::before { content: "↻ "; color: var(--signal); }
@media (hover: hover) and (pointer: fine) {
  .fl.is-written a:hover { color: var(--sc-ink); }
}
.file__foot { margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--rule); display: grid; gap: 0.6rem; }
.file__motto { font: 400 0.7rem/1.4 var(--sc-font-mono); color: var(--sc-ink-soft); letter-spacing: 0.04em; }
.file__bar { height: 2px; background: var(--rule); border-radius: 2px; overflow: hidden; }
.file__bar i { display: block; height: 100%; width: 100%; background: var(--sc-accent); transform-origin: 0 50%; transform: scaleX(var(--read, 0)); }

/* ----------------------------------------------------------------- hero -- */
.hero { --ground: var(--sc-canvas); }
.hero__stage { background: var(--sc-canvas); }
.hero__plate, .hero__gl, .hero__atmos {
  position: absolute; inset: 0; width: 100%; height: 100%;
}
.hero__plate { object-fit: cover; object-position: 62% 60%; transition: opacity 500ms var(--ease-out); }
.hero__gl { opacity: 0; transition: opacity 600ms var(--ease-out); }
.hero.gl-ready .hero__gl { opacity: 1; }
.hero.gl-ready .hero__plate { opacity: 0; }
.hero__atmos { pointer-events: none; z-index: 3; }
.hero__scrim {
  position: absolute; inset: 0; z-index: 4; pointer-events: none;
  background:
    radial-gradient(34% 26% at 50% 25%, color-mix(in oklab, var(--sc-canvas) 78%, transparent) 0%, color-mix(in oklab, var(--sc-canvas) 40%, transparent) 55%, transparent 100%),
    radial-gradient(70% 70% at 22% 36%, color-mix(in oklab, var(--sc-canvas) 62%, transparent) 0%, transparent 70%),
    radial-gradient(42% 30% at 30% 64%, color-mix(in oklab, var(--sc-canvas) 58%, transparent) 0%, transparent 100%),
    linear-gradient(180deg, color-mix(in oklab, var(--sc-canvas) 30%, transparent) 0%, transparent 22%);
}
:root[data-theme="night"] .hero__scrim {
  background:
    radial-gradient(70% 70% at 22% 36%, color-mix(in oklab, var(--sc-canvas) 55%, transparent) 0%, transparent 72%),
    radial-gradient(42% 30% at 30% 64%, color-mix(in oklab, var(--sc-canvas) 55%, transparent) 0%, transparent 100%),
    linear-gradient(180deg, color-mix(in oklab, var(--sc-canvas) 35%, transparent) 0%, transparent 25%);
}
.hero__copy {
  position: absolute; z-index: 8; /* above the foreground fronds (7): a leaf hid "Cómo funciona" on landscape tablets */
  left: var(--content-l); top: calc(var(--chrome-h) + clamp(3.5rem, 11vh, 8rem));
  width: min(44rem, 52vw);
}
.hero__lift { will-change: transform, opacity; }
.hero__title { font-size: var(--t-hero); font-weight: 420; line-height: 0.98; letter-spacing: -0.03em; max-width: 12ch; }
.hero__title em { font-weight: 400; color: var(--accent-deep); }
:root[data-theme="night"] .hero__title em { color: var(--sc-accent); }
.hero__sub { margin-top: 1.6rem; font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.28rem); line-height: 1.5; max-width: 34ch; color: var(--sc-ink); }
.hero__sub b { font-weight: 560; }
/* Legibility over the engraved city (6-oct-2026): the paragraph and the
   secondary link fell on dense linework on landscape tablets. A halo in the
   ground colour lifts each letter off the hatching without boxing the copy. */
.hero__sub, .hero__copy .link {
  text-shadow: 0 0 0.25em var(--sc-canvas), 0 0 0.6em var(--sc-canvas), 0 0 1.2em color-mix(in oklab, var(--sc-canvas) 80%, transparent);
}
.hero__title { text-shadow: 0 0 0.12em color-mix(in oklab, var(--sc-canvas) 70%, transparent), 0 0 0.4em color-mix(in oklab, var(--sc-canvas) 45%, transparent); }
.hero__actions { margin-top: 2.1rem; display: flex; align-items: center; gap: 1.4rem; flex-wrap: wrap; }

.hero__fg { position: absolute; z-index: 7; pointer-events: none; will-change: transform; max-width: none; }
.hero__vine { top: -11%; left: 66vw; width: clamp(8rem, 12.5vw, 13.5rem); transform-origin: 50% 0%; }
.hero__fronds { bottom: -9%; left: -4%; width: clamp(36rem, 58vw, 60rem); transform-origin: 0% 100%; }
:root[data-theme="night"] .hero__fg { filter: brightness(0.32) saturate(0.7) hue-rotate(-18deg) contrast(1.15); }

.hero__foot {
  position: absolute; z-index: 6; left: var(--content-l); right: var(--content-r); bottom: 1.4rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.hero__coords { font: 400 0.7rem/1 var(--sc-font-mono); letter-spacing: 0.08em; color: var(--sc-ink-soft); text-transform: uppercase; }

/* --------------------------------------------------------------- close -- */
.close { --ground: var(--ground-2); }
.close__inner { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(2rem, 5vw, 5rem); align-items: center; }
.close__h { font-size: var(--t-h2); }
.close__lede { margin-top: 1.4rem; }
.editor {
  position: relative; border-radius: var(--sc-r-lg);
  background: var(--sc-surface);
  box-shadow: var(--sc-e3), var(--sc-edge);
  border: 1px solid var(--rule);
  overflow: hidden;
}
.editor__bar { display: flex; align-items: center; gap: 0.6rem; padding: 0.75rem 1rem; border-bottom: 1px solid var(--rule); font: 500 0.78rem/1 var(--sc-font-mono); }
/* No window-chrome dots: the bar is a file name and its state, nothing else (anti-slop, 1-oct-2026). */
.editor__bar .fname { color: var(--sc-ink); }
.editor__bar .state { margin-left: auto; color: var(--sc-ink-soft); font-weight: 400; }
.editor__body { padding: 1.4rem 1.4rem 1.5rem; font: 400 0.95rem/1.7 var(--sc-font-mono); }
.editor__body .h { color: var(--sc-ink); }
.editor__body .k { color: var(--sc-ink-soft); }
.editor__row { display: grid; gap: 0.35rem; margin-top: 0.8rem; }
.editor__input {
  width: 100%; border: 0; border-bottom: 1px dashed var(--rule-strong); background: transparent;
  font: 500 clamp(1.15rem, 1rem + 0.6vw, 1.45rem)/1.4 var(--sc-font-display);
  color: var(--sc-ink); padding: 0.3rem 0.2rem 0.45rem;
}
.editor__input::placeholder { color: color-mix(in oklab, var(--sc-ink-soft) 70%, transparent); font-style: italic; }
.editor__input:focus-visible { border-bottom-color: var(--sc-accent); }
.editor__meter { display: flex; align-items: center; gap: 0.75rem; margin-top: 0.4rem; font: 400 0.76rem/1.3 var(--sc-font-mono); color: var(--sc-ink-soft); }
.editor__pips { display: flex; gap: 4px; }
.editor__pips i { width: 16px; height: 4px; border-radius: 2px; background: var(--rule); transition: background-color 160ms var(--ease-out); }
.editor__pips i.on { background: var(--signal); }
.editor__pips.over i.on { background: var(--accent-deep); }
.editor__note { margin-top: 1.1rem; min-height: 3.2em; font: 400 0.95rem/1.55 var(--sc-font-text); color: var(--sc-ink); }
.editor__go { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; padding: 1.1rem 1.4rem 1.3rem; border-top: 1px solid var(--rule); background: color-mix(in oklab, var(--sc-canvas) 40%, var(--sc-surface)); }
.editor__fine { font: 400 0.8rem/1.45 var(--sc-font-text); color: var(--sc-ink-soft); max-width: 30ch; }

/* -------------------------------------------------------------- footer -- */
.foot { position: relative; background: var(--sc-canvas); overflow: hidden; transition: background-color var(--theme-dur) var(--ease-out); }
.foot__inner { padding: clamp(3rem, 8vh, 5rem) var(--content-r) 1.5rem var(--content-l); }
.foot__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 2rem; }
.foot__grid h3 { font: 500 0.72rem/1 var(--sc-font-mono); letter-spacing: 0.09em; text-transform: uppercase; color: var(--sc-ink-soft); margin-bottom: 1rem; }
.foot__grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.55rem; }
.foot__grid a { text-decoration: none; font-size: 0.95rem; }
.foot__grid a:hover { text-decoration: underline; text-underline-offset: 0.3em; }
.foot__say { font: 440 1.35rem/1.25 var(--sc-font-display); max-width: 20ch; }
.foot__word {
  margin: clamp(3rem, 8vh, 6rem) 0 0; line-height: 0.8; white-space: nowrap;
  font: 340 clamp(4rem, 9.6vw, 12rem)/0.82 var(--sc-font-display);
  letter-spacing: -0.045em;
  color: transparent; -webkit-text-stroke: 1px var(--rule-strong);
  user-select: none;
}
.foot__word span { -webkit-text-stroke-color: color-mix(in oklab, var(--sc-accent) 70%, transparent); }
.foot__legal { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1.2rem; padding-top: 1.1rem; border-top: 1px solid var(--rule); font: 400 0.74rem/1.4 var(--sc-font-mono); color: var(--sc-ink-soft); }

/* ------------------------------------------------------- theme reveal -- */
::view-transition-old(root), ::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
::view-transition-new(root) { z-index: 9999; }
::view-transition-old(root) { z-index: 1; }

/* ---------------------------------------------------------- responsive -- */
@media (max-width: 1100px) {
  :root { --rail-w: 0px; --content-l: clamp(1.25rem, 5vw, 3rem); --content-r: clamp(1.25rem, 5vw, 3rem); }
  /* The living file folds into a read-only pill beside the dial: file name on
     top, the line of the chapter you are in below (decision D2, 5-oct-2026).
     It takes the dial's tone, so it reads over paper, night and photos. */
  .rail {
    top: calc((var(--chrome-h) - 2.35rem) / 2); bottom: auto;
    left: var(--content-l); right: calc(var(--content-r) + var(--chrome-room, 19rem));
    width: auto; height: 2.35rem; padding: 0 0.75rem;
    flex-direction: row; align-items: center; pointer-events: none;
    border: 1px solid var(--rule-strong); border-radius: var(--sc-r-md);
    background: color-mix(in oklab, var(--sc-surface) 94%, transparent);
    -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  }
  .rail:has(.file__tab[data-tone="dark"]) { --sc-surface: #0C2327; --rule-strong: color-mix(in oklab, #E4EDE6 30%, transparent); }
  .rail:has(.file__tab[data-tone="light"]) { --sc-surface: #F6F7EE; --rule-strong: color-mix(in oklab, #12261A 28%, transparent); }
  .rail::before, .rail__brand, .file__h, .file__foot, .file__saved, .fl__ghost, .rail .fl a::before { display: none; }
  .rail [data-bare] { text-shadow: none; }
  .rail .file { display: flex; flex-direction: column; justify-content: center; gap: 0.18rem; min-width: 0; width: 100%; }
  .rail .file__tab { font: 400 0.6rem/1 var(--sc-font-mono); letter-spacing: 0.02em; color: var(--sc-ink-soft); margin: 0; padding: 0; border: 0; background: none; }
  .rail .file__lines, .rail nav { margin: 0; padding: 0; min-width: 0; max-width: 100%; overflow: hidden; }
  .rail .fl { display: none; margin: 0; min-width: 0; }
  .rail .fl.is-active { display: block; }
  .rail .fl a { display: block; padding: 0; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; font: 500 0.74rem/1.15 var(--sc-font-mono); color: var(--sc-ink); }
  .hero__copy { width: auto; right: var(--content-r); }
  .close__inner { grid-template-columns: 1fr; }
  .foot__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  :root { --t-hero: clamp(2.5rem, 1.6rem + 5vw, 3.4rem); --chrome-h: 3.6rem; --chrome-room: 3.6rem; }
  .dial__label { display: none; }
  .chrome .cta { display: none; }
  .hero__fronds { width: 150vw; left: -30vw; }
  .hero__vine { display: none; }
  /* touch targets: 44px rows for text links (5-oct-2026) */
  .hero__copy .link { display: inline-flex; align-items: center; min-height: 44px; }
  .foot__grid ul { gap: 0; }
  .foot__grid a { display: inline-flex; align-items: center; min-height: 44px; }
  /* the wordmark fits the width instead of being cut at "Herná" */
  .foot__word { font-size: calc((100vw - var(--content-l) - var(--content-r)) / 8.2); letter-spacing: -0.035em; }
}

@media (prefers-reduced-motion: reduce) {
  .hero__fg, .hero__lift { transform: none !important; }
  .dial__wheel, .dial__label span { transition: none; }
}

/* The circular theme reveal captures a live snapshot; transitions inside it
   would fade old colours into the new world. Suspend them for the reveal. */
.theme-switching, .theme-switching *, .theme-switching *::before, .theme-switching *::after { transition: none !important; }

/* Landing: the lines of the hero arrive once, in reading order. */
@media (prefers-reduced-motion: no-preference) {
  .js .hero__lift > * { opacity: 0; transform: translateY(18px); }
  .is-booted .hero__lift > * { animation: heroIn 1100ms var(--ease-out) forwards; }
  .is-booted .hero__lift > :nth-child(2) { animation-delay: 160ms; }
  .is-booted .hero__lift > :nth-child(3) { animation-delay: 300ms; }
  .js .hero__fg { opacity: 0; }
  .is-booted .hero__fg { animation: fgIn 1600ms var(--ease-out) 200ms forwards; }
}
@keyframes heroIn { to { opacity: 1; transform: none; } }
@keyframes fgIn { from { opacity: 0; } to { opacity: 1; } }

.fl__mark { background: color-mix(in oklab, var(--sc-accent) 34%, transparent); color: var(--sc-ink); border-radius: 2px; padding: 0 0.12em; animation: markIn 1.8s var(--ease-out) forwards; }
@keyframes markIn { 0% { background: color-mix(in oklab, var(--sc-accent) 55%, transparent); } 100% { background: color-mix(in oklab, var(--sc-accent) 0%, transparent); } }

/* Without JavaScript the page is a plain, complete document: nothing waits for
   a cue that will never fire, the hero keeps its frame, rails scroll natively. */
html:not(.js) :is([data-sc-in], [data-sc-stagger] > *, [data-sc-cue], [data-sc-copy]) { opacity: 1 !important; transform: none !important; }
html:not(.js) .hero__stage { position: relative; height: 100vh; height: 100svh; overflow: hidden; }
html:not(.js) [data-sc-pan] { overflow-x: auto; max-width: 100%; }
html:not(.js) .hero__fg { display: none; }
html:not(.js) [data-sc-act]:not([data-sc-act="flow"]) > [data-sc-stage] { position: relative; min-height: 100vh; min-height: 100svh; overflow: hidden; }

/* The dial follows the tone of the chapter under the chrome. */
.chrome[data-tone="dark"] .dial { --sc-surface: #0C2327; --sc-ink: #E4EDE6; --sc-ink-soft: #A7B9AE; --rule-strong: color-mix(in oklab, #E4EDE6 30%, transparent); color: var(--sc-ink); }
.chrome[data-tone="light"] .dial { --sc-surface: #F6F7EE; --sc-ink: #12261A; --sc-ink-soft: #4A5C4E; --rule-strong: color-mix(in oklab, #12261A 28%, transparent); color: var(--sc-ink); }

/* Focus: a two-tone ring (ink inside, deep teal by day / teal at night
   outside) that clears 3:1 on paper (5:1), on the forest ground and on every
   engraving. Gold on sage measured 1.8:1, so it no longer carries focus. */
:focus-visible { outline: 2px solid var(--sc-ink); outline-offset: 2px; box-shadow: 0 0 0 5px var(--focus); border-radius: var(--sc-r-sm); }
.cta:focus-visible { box-shadow: 0 0 0 5px var(--focus), 0 6px 16px -8px hsl(var(--sc-shadow-color) / 0.55); }
/* keyboard jumps are instant: a smooth glide through pinned scenes reads as the site racing past */
html:has(:focus-visible) { scroll-behavior: auto; }

/* Before the engine mounts, pinned stages already hold a viewport, so the
   first paint is the hero, never the chapter that happens to float up. */
html.js:not(.sc-ready) [data-sc-act]:not([data-sc-act="flow"]) > [data-sc-stage] { position: sticky; top: 0; height: 100vh; height: 100svh; overflow: clip; }

/* Hero: the near foliage dissolves at its lower edge instead of showing a cut */
.hero__fronds { -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 82%, transparent 100%); mask-image: linear-gradient(180deg, #000 0%, #000 82%, transparent 100%); }
/* Hero exit: the plate gives way to the next chapter's paper on a soft edge */
.hero__stage::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 16vh; z-index: 9; pointer-events: none;
  background: linear-gradient(180deg, transparent, var(--ground-2)); opacity: var(--exit, 0); }

/* Without JS, beats that crossfade in place become a readable stack */
html:not(.js) .chaos__beats > * { grid-area: auto !important; }
html:not(.js) .chaos__beat + .chaos__beat { margin-top: 1rem; }

/* No sideways drift on narrow screens from any chapter's overhanging art. */
html, body { overflow-x: clip; }

/* ------------------------------------------------------------- roles -- */
/* Two voices (1-oct-2026). --sc-accent is the brand (gold by day, teal at
   night). Inside these scopes "accent" means the person: their criterio, their
   action, today, the human node, the doubt, the sun. By day both voices are
   gold, so nothing changes; at night the person stays in sodium while the
   brand and what runs alone go teal. Never use --human for controls or states. */
.dial__sun, .dial__moon,
.ch__h em, .close__h em, .hero__title em,
.fl__mark, .editor__pips,
.about__yr, .about__odo-col, .about__pl, .about__city, .about__chip,
.chaos__obj, .chaos__tag,
.doors__orb, .doors__dg .acc,
.faq__xl, .faq__fig, .faq-hpa,
.peak__body, .peak__halo, .peak__trail, .peak__line,
.proof__panel, .proof__mark, .proof__ba-row,
.pp-node--human, .pp-seal, .pp-packets .pk--doubt, .pp-edge--branch, .dl-mark,
.tl-hito, .tl-dash, .tl-pin, .tl-pin-dot,
.turn__day.is-today, .turn__bar-b, .turn__key--a, .turn__b--clientes {
  --sc-accent: var(--human);
  --accent-deep: var(--human-deep);
  --sc-accent-ink: var(--human-ink);
}

/* ------------------------------------------------------ night: the desk -- */
/* At night the page is also a work desk: walnut slats and a desk top lit from
   above by a hidden warm LED strip and a lamp. The wood is structure plus
   light, re-inked to the hero's olive ink; the groove is the night ground, so
   the wood dissolves into the page. A fine 1px/3px hatch exists only where
   the light falls (it rhymes with the hero's burin when zoomed). Never flat
   brown, never a brown gradient. */
:root {
  --wood-face: #312814; --wood-lit: #42361F; --wood-edge: #9C8255; --wood-shade: #211A0B; --wood-groove: #020F11;
  --led: 236 197 128;          /* #ECC580 hidden strip */
  --lamp: 243 171 86;          /* #F3AB56 desk lamp */
  --wood-slats: repeating-linear-gradient(90deg, var(--wood-edge) 0 1px, var(--wood-lit) 1px 3px, var(--wood-face) 3px 10px, var(--wood-shade) 10px 12px, var(--wood-groove) 12px 16px);
  --wood-hatch-v: repeating-linear-gradient(90deg, rgb(255 236 200 / 0.16) 0 1px, transparent 1px 3px);
  --wood-hatch-h: repeating-linear-gradient(0deg, rgb(255 236 200 / 0.14) 0 1px, transparent 1px 3px);
  --led-wash: linear-gradient(180deg, rgb(var(--led) / 0.95) 0, rgb(var(--led) / 0.55) 5%, rgb(var(--led) / 0.22) 18%, rgb(var(--led) / 0.06) 36%, transparent 48%);
  --led-mask: linear-gradient(180deg, #000 0, rgb(0 0 0 / 0.6) 18%, transparent 46%);
}
/* "corre solo" is a small LED with a lens, not a flat dot */
:root[data-theme="night"] .chip--run::before {
  background: radial-gradient(circle at 38% 34%, #F4FFFD 0 16%, #7FEBDB 34%, currentColor 62%, color-mix(in oklab, currentColor 60%, #000) 100%);
  box-shadow: 0 0 0 1px color-mix(in oklab, #1F2426 70%, transparent), 0 0 4px 1px color-mix(in oklab, currentColor 45%, transparent);
}
/* the close: the editor rests on a desk top under a lamp */
:root[data-theme="night"] .close {
  background: radial-gradient(36% 70% at 70% 40%, rgb(var(--lamp) / 0.12), rgb(var(--lamp) / 0.04) 50%, transparent 78%), var(--ground);
}
:root[data-theme="night"] .close .editor { position: relative; z-index: 1; box-shadow: var(--sc-e3), var(--sc-edge), inset 0 1px 0 rgb(var(--led) / 0.30); }
@media (min-width: 1101px) {
  :root[data-theme="night"] .close__copy { grid-column: 1; grid-row: 1; }
  :root[data-theme="night"] .close .editor { grid-column: 2; grid-row: 1; }
  :root[data-theme="night"] .close__inner::before,
  :root[data-theme="night"] .close__inner::after {
    content: ""; grid-column: 2; grid-row: 1; align-self: stretch; z-index: 0; pointer-events: none;
    margin: -2.4rem -2.2rem -2.8rem -1.8rem; border-radius: 3px;
  }
  :root[data-theme="night"] .close__inner::before {
    position: relative;
    background:
      radial-gradient(55% 60% at 32% 22%, rgb(var(--lamp) / 0.40), rgb(var(--lamp) / 0.10) 45%, transparent 75%),
      repeating-linear-gradient(0deg, var(--wood-groove) 0 2px, var(--wood-shade) 2px 4px, var(--wood-face) 4px 30px, var(--wood-lit) 30px 33px, var(--wood-edge) 33px 34px);
    background-blend-mode: screen, normal;
    box-shadow: 0 18px 40px -12px rgb(0 0 0 / 0.6);
  }
  :root[data-theme="night"] .close__inner::after {
    background: var(--wood-hatch-h);
    -webkit-mask: radial-gradient(50% 55% at 32% 22%, #000, transparent 75%); mask: radial-gradient(50% 55% at 32% 22%, #000, transparent 75%);
  }
}
/* the footer: slats under the shelf, grazed by the strip */
:root[data-theme="night"] .foot__inner { position: relative; z-index: 1; }
:root[data-theme="night"] .foot::before,
:root[data-theme="night"] .foot::after { content: ""; position: absolute; inset: 0 0 auto 0; pointer-events: none; }
:root[data-theme="night"] .foot::before {
  height: 62%;
  background: linear-gradient(180deg, rgb(var(--led) / 0.70) 0, rgb(var(--led) / 0.38) 5%, rgb(var(--led) / 0.22) 18%, rgb(var(--led) / 0.06) 36%, transparent 48%), var(--wood-slats);
  background-blend-mode: screen, normal;
  -webkit-mask: linear-gradient(180deg, #000 0, rgb(0 0 0 / 0.55) 30%, transparent 100%);
          mask: linear-gradient(180deg, #000 0, rgb(0 0 0 / 0.55) 30%, transparent 100%);
}
:root[data-theme="night"] .foot::after {
  height: 28%; background: var(--wood-hatch-v);
  -webkit-mask: linear-gradient(180deg, #000, transparent); mask: linear-gradient(180deg, #000, transparent);
}