/* ============================================================
   LAYOUT — app shell, chrome, controls, Line of Sight, boot
   Scene-type styles live in intro.css / hub.css / deck.css.
   ============================================================ */
#app { position: fixed; inset: 0; overflow: hidden; }

#stage { position: absolute; inset: 0; z-index: var(--z-scene); }

/* Each scene is a full-viewport fixed canvas. Two can co-exist during a transition. */
.scene {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: center;
  padding: var(--pad-stage);
  padding-inline: max(var(--pad-stage), calc((100% - var(--maxw)) / 2)); /* cap content on ultra-wide screens */
  padding-top: clamp(4.75rem, 10vh, 7.5rem);    /* clear chrome */
  padding-bottom: clamp(4.5rem, 9vh, 6.5rem);   /* clear controls */
  overflow: hidden;
  will-change: transform, opacity;
}

/* ---------- shared editorial type helpers ---------- */
.eyebrow {
  font-family: var(--font-calibre); font-weight: 600;
  font-size: var(--fs-label); letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase; line-height: 1;
}
.mono {
  font-family: var(--font-mono); font-size: var(--fs-mono);
  letter-spacing: var(--tracking-label); line-height: 1.4;
  text-transform: uppercase; /* Space Mono is always set in caps */
}
.rule { display: block; height: var(--rule); background: currentColor; opacity: 0.4; border: 0; }

/* The inline phrase underline — the Line of Sight at sentence scale. */
.los-underline { position: relative; white-space: nowrap; }
.los-underline__bar {
  position: absolute; left: 0; right: 0; bottom: -0.1em;
  height: var(--los-weight); background: var(--accent-green);
  transform: scaleX(0); transform-origin: left center;
}

/* ============================================================
   CHROME — logo + wayfinding (color follows --chrome-ink)
   ============================================================ */
.chrome {
  position: fixed; top: 0; left: 0; right: 0; z-index: var(--z-chrome);
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
  padding-block: clamp(1rem, 2.6vw, 1.7rem);
  padding-inline: max(var(--pad-stage), calc((100% - var(--maxw)) / 2));
  color: var(--chrome-ink, var(--white));
  pointer-events: none;
}
.chrome > * { pointer-events: auto; }

.chrome__logo {
  display: block; width: clamp(56px, 5.5vw, 80px); height: auto;
  color: var(--chrome-ink, var(--white)); /* drives the inlined currentColor logo */
}
.chrome__logo:focus-visible { outline-offset: 6px; }

.wayfind { display: flex; align-items: baseline; gap: clamp(0.75rem, 1.6vw, 1.5rem); }
.wayfind__ctx {
  font-family: var(--font-calibre); font-weight: 600;
  font-size: var(--fs-label); letter-spacing: var(--tracking-label);
  text-transform: uppercase; opacity: 0.85;
}
.wayfind__index { font-family: var(--font-mono); font-size: var(--fs-mono); opacity: 0.7; text-transform: uppercase; }
.wayfind__index b { color: var(--accent-green); font-weight: 700; }

/* ============================================================
   CONTROLS — prev / next / hub + scene dots
   ============================================================ */
.controls {
  position: fixed; right: max(var(--pad-stage), calc((100% - var(--maxw)) / 2)); bottom: clamp(1rem, 2.6vw, 1.7rem);
  z-index: var(--z-controls);
  display: flex; align-items: center; gap: 0.6rem;
  color: var(--chrome-ink, var(--white));
}
.scene-dots { display: flex; gap: 0.4rem; margin-right: 0.6rem; }
.dot {
  width: 7px; height: 7px; background: currentColor; opacity: 0.3;
  transition: opacity var(--dur-fast) var(--ease-cbre), transform var(--dur-fast) var(--ease-cbre);
}
.dot.is-active { opacity: 1; transform: scale(1.35); }

.ctrl-btn {
  width: 46px; height: 46px; display: grid; place-items: center;
  border: 1px solid currentColor; color: inherit; opacity: 0.55;
  transition: opacity var(--dur-fast) var(--ease-cbre), background var(--dur-fast), color var(--dur-fast);
}
.ctrl-btn svg { width: 18px; height: 18px; }
.ctrl-btn:hover, .ctrl-btn:focus-visible { opacity: 1; background: currentColor; }
.ctrl-btn:hover svg, .ctrl-btn:focus-visible svg { color: var(--dark-green); }
.ctrl-btn[disabled] { opacity: 0.18; cursor: not-allowed; background: none; }
.ctrl-btn[disabled]:hover svg { color: inherit; }
.ctrl-btn--hub { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; }

/* ============================================================
   LINE OF SIGHT — persistent overlay
   ============================================================ */
#los-overlay {
  position: fixed; inset: 0; width: 100%; height: 100%;
  z-index: var(--z-los); pointer-events: none; overflow: visible;
}
#los-overlay path, #los-overlay line, #los-overlay polyline {
  fill: none; stroke: var(--accent-green); stroke-width: var(--los-weight);
  vector-effect: non-scaling-stroke; stroke-linecap: square; stroke-linejoin: miter;
}
#los-overlay circle { fill: var(--accent-green); stroke: none; }

/* ============================================================
   BOOT — covers first paint until app + fonts ready
   ============================================================ */
.boot {
  position: fixed; inset: 0; z-index: 100; background: var(--dark-green);
  display: grid; place-items: center;
  transition: opacity 0.5s var(--ease-cbre);
}
.boot.is-hidden { opacity: 0; pointer-events: none; }
.boot__mark {
  font-family: var(--font-calibre); font-weight: 700;
  letter-spacing: 0.35em; font-size: 0.95rem; color: var(--white); opacity: 0.55;
  animation: bootPulse 1.4s ease-in-out infinite;
}
@keyframes bootPulse { 0%,100% { opacity: 0.25; } 50% { opacity: 0.7; } }

/* ============================================================
   PASSWORD GATE — shown before boot (unless already authed)
   ============================================================ */
.gate {
  position: fixed; inset: 0; z-index: 200;
  background: var(--dark-green); color: var(--white);
  display: grid; place-items: center; padding: var(--pad-stage);
}
.gate[hidden] { display: none; }
.gate__card { width: min(420px, 100%); display: flex; flex-direction: column; align-items: flex-start; }
.gate__logo { width: 84px; height: auto; color: var(--white); margin-bottom: clamp(2rem, 6vh, 3.5rem); }
.gate__eyebrow { opacity: 0.6; margin-bottom: 0.9rem; }
.gate__title { font-family: var(--font-financier); font-weight: 500; font-size: clamp(2.2rem, 5vw, 3.25rem); line-height: 1.0; }
.gate__rule { display: block; width: 64px; height: var(--los-weight); background: var(--accent-green); margin: 1.1rem 0 1.3rem; }
.gate__sub { opacity: 0.75; font-size: var(--fs-body); margin-bottom: clamp(1.6rem, 4vh, 2.4rem); }
.gate__field { position: relative; width: 100%; margin-bottom: 0.9rem; }
.gate__input {
  width: 100%; font-family: var(--font-calibre); font-size: 1.05rem; color: var(--white);
  background: color-mix(in srgb, var(--white) 7%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--white) 22%, transparent);
  padding: 0.95rem 4.4rem 0.95rem 1.1rem;
}
.gate__input::placeholder { color: color-mix(in srgb, var(--white) 45%, transparent); }
.gate__input:focus { outline: none; box-shadow: inset 0 0 0 2px var(--accent-green); }
.gate__toggle { position: absolute; right: 0.6rem; top: 50%; transform: translateY(-50%); color: var(--accent-green); opacity: 0.85; padding: 0.45rem 0.5rem; }
.gate__toggle:hover, .gate__toggle:focus-visible { opacity: 1; }
.gate__error { color: #FF8B7A; font-size: var(--fs-body); margin-bottom: 0.9rem; }
.gate__error[hidden] { display: none; }
.gate__submit { width: 100%; justify-content: center; margin-top: 0.4rem; }
.gate__submit:hover, .gate__submit:focus-visible { transform: none; filter: brightness(1.05); }
.gate.is-wrong .gate__card { animation: gateShake 0.4s var(--ease-inout); }
@keyframes gateShake { 0%,100% { transform: translateX(0); } 20%,60% { transform: translateX(-7px); } 40%,80% { transform: translateX(7px); } }
@media (prefers-reduced-motion: reduce) { .gate.is-wrong .gate__card { animation: none; } }

/* ============================================================
   HELP OVERLAY
   ============================================================ */
.help-overlay {
  position: fixed; inset: 0; z-index: var(--z-overlay);
  background: color-mix(in srgb, var(--dark-green) 94%, transparent);
  display: grid; place-items: center; padding: var(--pad-stage);
}
.help-overlay[hidden] { display: none; }

/* ---- lightbox (click-to-zoom media) ---- */
.lightbox {
  position: fixed; inset: 0; z-index: var(--z-overlay);
  display: grid; place-items: center; padding: clamp(1.5rem, 5vw, 4rem);
  background: color-mix(in srgb, var(--dark-green) 92%, transparent);
}
.lightbox[hidden] { display: none; }
.lightbox__fig { margin: 0; max-width: min(1280px, 94vw); width: 100%; }
.lightbox__media { display: block; width: 100%; height: auto; max-height: 82vh; object-fit: contain; background: #000; }
.lightbox__close {
  position: fixed; top: clamp(1rem, 2.5vw, 1.6rem); right: clamp(1rem, 2.5vw, 1.6rem);
  width: 44px; height: 44px; display: grid; place-items: center; color: #fff;
  background: color-mix(in srgb, var(--dark-green) 55%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, #fff 30%, transparent);
}
.lightbox__close svg { width: 20px; height: 20px; }
.lightbox__close:hover, .lightbox__close:focus-visible { background: var(--accent-green); color: var(--dark-green); }
.help { width: min(560px, 100%); color: var(--white); }
.help h2 { font-size: var(--fs-h2); margin-bottom: 1.5rem; color: var(--white); }
.help__row {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  padding: 0.7rem 0; border-top: 1px solid color-mix(in srgb, var(--white) 18%, transparent);
}
.help__keys { display: flex; gap: 0.4rem; }
.help__key {
  font-family: var(--font-mono); font-size: var(--fs-mono);
  border: 1px solid color-mix(in srgb, var(--white) 35%, transparent);
  padding: 0.2rem 0.5rem; min-width: 2rem; text-align: center; text-transform: uppercase;
}
.help__desc { font-size: var(--fs-body); opacity: 0.85; }
.help__hint { margin-top: 1.5rem; opacity: 0.6; }

/* shared CTA button (used on access + intro) */
.btn {
  display: inline-flex; align-items: center; gap: 0.75rem;
  font-family: var(--font-calibre); font-weight: 600; font-size: var(--fs-body);
  letter-spacing: 0.01em; padding: 0.95rem 1.6rem;
  background: var(--accent-green); color: var(--dark-green);
  transition: transform var(--dur-fast) var(--ease-cbre), filter var(--dur-fast);
}
.btn svg { width: 18px; height: 18px; }
.btn:hover, .btn:focus-visible { transform: translateX(4px); filter: brightness(1.05); }
.btn--ghost { background: none; color: inherit; box-shadow: inset 0 0 0 1px currentColor; }
.btn--ghost:hover, .btn--ghost:focus-visible { background: currentColor; }
.btn--ghost:hover span, .btn--ghost:focus-visible span { color: var(--dark-green); }