/* NODE 03 — visual system */

:root {
  --void: #030504;
  --signal-dim: #1e4a32;
  --signal: #3d8b5c;
  --signal-mid: #5cff9d;
  --signal-hot: #b8ffd4;
  --gold-dim: #5c4a22;
  --gold: #c9a227;
  --gold-mid: #e8c547;
  --gold-hot: #ffe9a0;
  --mist: #b7c0b8;
  --paper: #d8d3c6;

  --pad: clamp(1.1rem, 3.5vw, 2.4rem);
  --observer: clamp(120px, 36vw, 260px);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html,
body {
  min-height: 100%;
  background: var(--void);
  color: var(--mist);
  overscroll-behavior: none;
}

html {
  background: var(--void);
}

body {
  min-height: 100svh;
  overflow: hidden;
  cursor: default;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

::selection {
  background: rgba(61, 139, 92, 0.35);
  color: var(--paper);
}

body.realm-medio ::selection {
  background: rgba(201, 162, 39, 0.35);
}

/* ——— Atmosphere ——— */

.vignette,
.scanlines,
.grain,
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.vignette {
  z-index: 50;
  background:
    radial-gradient(ellipse at center, transparent 42%, rgba(0, 0, 0, 0.55) 100%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.28) 0%, transparent 18%, transparent 82%, rgba(0, 0, 0, 0.38) 100%);
}

.scanlines {
  z-index: 51;
  opacity: 0.045;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0px,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, 0.55) 3px
  );
  mix-blend-mode: multiply;
}

body.realm-medio .scanlines {
  opacity: 0.025;
}

.grain {
  z-index: 52;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.9'/%3E%3C/svg%3E");
  background-size: 180px 180px;
  animation: grain-shift 1.6s steps(2) infinite;
}

body.realm-medio .grain {
  opacity: 0.07;
  animation-duration: 3.2s;
}

.noise {
  z-index: 53;
  width: 100%;
  height: 100%;
  opacity: 0.035;
  mix-blend-mode: overlay;
}

.cursor-ghost {
  position: fixed;
  top: 0;
  left: 0;
  width: 7px;
  height: 7px;
  margin: -3.5px 0 0 -3.5px;
  border: 1px solid rgba(210, 200, 160, 0.4);
  border-radius: 50%;
  pointer-events: none;
  z-index: 60;
  opacity: 0;
  transform: translate(-100px, -100px);
  transition: opacity 0.4s ease, border-color 0.4s ease, background 0.4s ease;
  mix-blend-mode: screen;
}

body.is-pointer .cursor-ghost {
  opacity: 1;
}

body.is-pointer {
  cursor: none;
}

body.is-over-green .cursor-ghost {
  border-color: rgba(92, 255, 157, 0.7);
  background: rgba(92, 255, 157, 0.12);
}

body.is-over-gold .cursor-ghost {
  border-color: rgba(232, 197, 71, 0.75);
  background: rgba(232, 197, 71, 0.14);
  border-radius: 1px;
}

/* ——— Boot / veil ——— */

.boot,
.veil {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: var(--void);
  transition: opacity 0.9s var(--ease-out), visibility 0.9s var(--ease-out);
}

.boot.is-done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.veil {
  z-index: 70;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.7s var(--ease-out), visibility 0.7s var(--ease-out);
}

body.is-leaving .veil {
  opacity: 1;
  visibility: visible;
}

body.is-leaving-green .veil {
  box-shadow: inset 0 0 140px rgba(61, 139, 92, 0.18);
}

body.is-leaving-gold .veil {
  box-shadow: inset 0 0 140px rgba(201, 162, 39, 0.2);
}

body.is-leaving .shell {
  opacity: 0;
  filter: blur(10px);
  transform: scale(0.985);
}

/* ——— Shell ——— */

.shell {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: 100svh;
  min-height: 100dvh;
  padding: env(safe-area-inset-top) var(--pad) env(safe-area-inset-bottom);
  opacity: 0;
  transform: scale(1.015);
  filter: blur(6px);
  pointer-events: none;
  transition:
    opacity 1.3s var(--ease-out),
    transform 1.4s var(--ease-out),
    filter 1.2s var(--ease-out);
}

.shell[data-ready="true"] {
  opacity: 1;
  transform: none;
  filter: none;
  pointer-events: auto;
}

.stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}

.particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.observers {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1.2rem, 5vw, 3.4rem);
}

.observer {
  position: relative;
  width: var(--observer);
  height: var(--observer);
  display: block;
  outline: none;
  will-change: transform;
}

a.observer {
  cursor: pointer;
}

.observer::before,
.observer::after {
  content: "";
  position: absolute;
  pointer-events: none;
  border-radius: 50%;
}

.observer::before {
  inset: 16%;
  z-index: -1;
  filter: blur(18px);
  transition: inset 0.7s var(--ease-out), opacity 0.7s ease;
}

.observer::after {
  inset: 18%;
  z-index: 3;
  opacity: 0.14;
  mix-blend-mode: overlay;
}

.observer--green::before {
  background: radial-gradient(circle, rgba(61, 139, 92, 0.22) 0%, transparent 72%);
}

.observer--green::after {
  background: repeating-linear-gradient(
    to bottom,
    rgba(92, 255, 157, 0.18) 0px,
    rgba(92, 255, 157, 0.18) 1px,
    transparent 1px,
    transparent 5px
  );
  mix-blend-mode: screen;
  opacity: 0.12;
}

.observer--gold::before {
  background: radial-gradient(circle, rgba(201, 162, 39, 0.28) 0%, transparent 74%);
  filter: blur(22px);
}

.observer--gold::after {
  background:
    radial-gradient(circle at 42% 38%, rgba(255, 233, 160, 0.18), transparent 42%),
    repeating-conic-gradient(from 0deg, rgba(201, 162, 39, 0.08) 0deg 6deg, transparent 6deg 18deg);
  opacity: 0.2;
  mix-blend-mode: soft-light;
}

.observer:hover::before,
.observer:focus-visible::before,
.observer.is-hot::before {
  inset: 8%;
}

.observer.is-glitching .observer__svg {
  animation: observer-breathe 5.5s ease-in-out infinite, glitch-slice 180ms steps(2, jump-none);
}

.observer.is-ember .observer__svg {
  filter: drop-shadow(0 0 36px rgba(232, 197, 71, 0.45));
}

.observer__svg {
  width: 100%;
  height: 100%;
  overflow: visible;
  transition: filter 0.7s ease;
}

.observer--green .observer__svg {
  filter: drop-shadow(0 0 28px rgba(45, 106, 72, 0.18));
  animation: observer-breathe 5.5s ease-in-out infinite;
}

.observer--gold .observer__svg {
  filter: drop-shadow(0 0 32px rgba(201, 162, 39, 0.22));
  animation: observer-breathe-slow 11s ease-in-out infinite;
}

.observer--green:hover .observer__svg,
.observer--green:focus-visible .observer__svg,
.observer--green.is-hot .observer__svg {
  filter: drop-shadow(0 0 36px rgba(92, 255, 157, 0.32));
}

.observer--gold:hover .observer__svg,
.observer--gold:focus-visible .observer__svg,
.observer--gold.is-hot .observer__svg {
  filter: drop-shadow(0 0 42px rgba(232, 197, 71, 0.4));
}

/* ——— Shared marks ——— */

.obs-vesica {
  fill: none;
  stroke-width: 0.85;
  opacity: 0.62;
}

.observer--gold .obs-vesica {
  stroke: #6a5420;
}

.obs-vesica--a {
  animation: vesica-a 16s ease-in-out infinite;
}

.obs-vesica--b {
  animation: vesica-b 16s ease-in-out infinite;
}

.obs-ring {
  fill: none;
  stroke-width: 0.8;
}

.obs-ring--outer {
  stroke-width: 0.6;
  opacity: 0.7;
  transform-origin: 200px 200px;
}

.obs-ring--mid {
  opacity: 0.55;
  transform-origin: 200px 200px;
}

.obs-ring--inner {
  stroke-width: 0.7;
  opacity: 0.35;
}

.obs-ring--iris {
  stroke-width: 1.1;
  opacity: 0.55;
  transform-origin: 200px 200px;
}

.obs-ring--seal {
  stroke-width: 0.9;
  opacity: 0.45;
  transform-origin: 200px 200px;
}

.obs-core {
  opacity: 0.95;
}

.obs-slit {
  stroke-width: 0.6;
  opacity: 0.92;
}

.obs-pupil {
  opacity: 0.9;
  transform-origin: 200px 198px;
  transform-box: fill-box;
}

/* ——— Green: signal / system ——— */

.observer--green .obs-ring--outer {
  stroke: #1e4a32;
  stroke-dasharray: 3 8;
  animation: spin 56s linear infinite;
}

.observer--green .obs-ring--mid {
  stroke: #245c3c;
  stroke-dasharray: 140 380;
  animation: spin-rev 38s linear infinite;
}

.observer--green .obs-ring--inner {
  stroke: #3d8b5c;
}

.observer--green .obs-ring--iris {
  stroke: var(--signal);
  stroke-dasharray: 28 18 70 160;
  animation: spin 22s linear infinite;
}

.observer--green .obs-ticks {
  fill: none;
  stroke: #2a6344;
  stroke-width: 1.1;
  opacity: 0.8;
  transform-origin: 200px 200px;
  animation: spin-rev 90s linear infinite;
}

.observer--green .obs-brackets {
  fill: none;
  stroke: #3d8b5c;
  stroke-width: 1.1;
  opacity: 0.45;
}

.observer--green .obs-reticle {
  fill: none;
  stroke: #2f6b48;
  stroke-width: 0.7;
  opacity: 0.6;
}

.observer--green .obs-reticle__vert {
  opacity: 0.4;
}

.observer--green .obs-slit {
  fill: #06110b;
  stroke: #5cff9d;
  filter: drop-shadow(0 0 6px rgba(92, 255, 157, 0.45));
}

.observer--green .obs-pupil {
  fill: var(--signal-hot);
  animation: pupil 3.8s ease-in-out infinite;
}

.observer--green .obs-ping {
  fill: none;
  stroke: #5cff9d;
  stroke-width: 0.7;
  opacity: 0;
  transform-origin: 200px 200px;
  animation: radar-ping 4.2s ease-out infinite;
}

.observer--green .observer__scan {
  position: absolute;
  left: 12%;
  right: 12%;
  top: 12%;
  height: 1px;
  opacity: 0;
  pointer-events: none;
  mix-blend-mode: screen;
  background: linear-gradient(90deg, transparent, rgba(92, 255, 157, 0.45), transparent);
  animation: scan-sweep 6.5s ease-in-out infinite;
}

.observer--green .observer__scan--late {
  animation-delay: 3.1s;
  opacity: 0;
}

/* ——— Gold: seal / ritual ——— */

.observer--gold .obs-ring--outer {
  stroke: #5c4a22;
  stroke-dasharray: 1.5 7 14 7;
  animation: spin 180s linear infinite;
}

.observer--gold .obs-ring--mid {
  stroke: #8b6b2e;
  stroke-dasharray: none;
  opacity: 0.4;
  animation: spin-rev 220s linear infinite;
}

.observer--gold .obs-ring--seal {
  stroke: #c9a227;
  stroke-dasharray: 6 10 2 10;
  animation: spin 90s linear infinite;
}

.observer--gold .obs-ring--iris {
  stroke: var(--gold-mid);
  stroke-dasharray: 48 12 4 12 80 40;
  animation: spin-rev 70s linear infinite;
}

.observer--gold .obs-seal {
  fill: #e8c547;
  opacity: 0.55;
  transform-origin: 200px 200px;
  animation: spin 140s linear infinite;
}

.observer--gold .obs-ornament {
  fill: #e8c547;
  opacity: 0.5;
}

.observer--gold .obs-almond {
  fill: rgba(201, 162, 39, 0.05);
  stroke: #8b6b2e;
  stroke-width: 0.7;
  opacity: 0.7;
}

.observer--gold .obs-slit {
  fill: #120e06;
  stroke: #e8c547;
  filter: drop-shadow(0 0 8px rgba(232, 197, 71, 0.5));
}

.observer--gold .obs-pupil {
  fill: var(--gold-hot);
  animation: pupil-slow 7.5s ease-in-out infinite;
}

.observer--gold .obs-halo {
  animation: ember 5.2s ease-in-out infinite;
}

/* ——— Chambers ——— */

body.realm-superior,
body.realm-medio {
  --observer: clamp(200px, 52vw, 340px);
}

/* ——— Hidden architecture ——— */

.hidden-layer {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.archive-entry:empty,
.signal:empty,
.fragment:empty {
  display: none;
}

/* ——— Motion ——— */

@keyframes observer-breathe {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.016);
  }
}

@keyframes observer-breathe-slow {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.022);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes spin-rev {
  to {
    transform: rotate(-360deg);
  }
}

@keyframes vesica-a {
  0%,
  100% {
    opacity: 0.45;
  }
  50% {
    opacity: 0.75;
  }
}

@keyframes vesica-b {
  0%,
  100% {
    opacity: 0.75;
  }
  50% {
    opacity: 0.4;
  }
}

@keyframes pupil {
  0%,
  100% {
    opacity: 0.85;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.22);
  }
}

@keyframes pupil-slow {
  0%,
  100% {
    opacity: 0.8;
    transform: scale(1);
  }
  40% {
    opacity: 1;
    transform: scale(1.12);
  }
  55% {
    opacity: 0.7;
    transform: scale(0.94);
  }
}

@keyframes ember {
  0%,
  100% {
    opacity: 0.72;
  }
  50% {
    opacity: 1;
  }
}

@keyframes radar-ping {
  0% {
    transform: scale(1);
    opacity: 0.4;
  }
  100% {
    transform: scale(3.15);
    opacity: 0;
  }
}

@keyframes scan-sweep {
  0%,
  62%,
  100% {
    opacity: 0;
    transform: translateY(0);
  }
  68% {
    opacity: 0.8;
    transform: translateY(0);
  }
  86% {
    opacity: 0;
    transform: translateY(calc(var(--observer) * 0.76));
  }
}

@keyframes grain-shift {
  0% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(-1%, 1%);
  }
  50% {
    transform: translate(1%, -1%);
  }
  75% {
    transform: translate(-1%, -1%);
  }
  100% {
    transform: translate(0, 0);
  }
}

@keyframes glitch-slice {
  0% {
    clip-path: inset(0 0 0 0);
    transform: translate(0);
  }
  25% {
    clip-path: inset(18% 0 58% 0);
    transform: translate(-3px, 0);
  }
  50% {
    clip-path: inset(48% 0 12% 0);
    transform: translate(3px, 1px);
  }
  75% {
    clip-path: inset(8% 0 70% 0);
    transform: translate(-1px, -1px);
  }
  100% {
    clip-path: inset(0 0 0 0);
    transform: translate(0);
  }
}

body.is-interfere .scanlines {
  opacity: 0.12;
}

@media (max-width: 720px) {
  body.is-pointer {
    cursor: auto;
  }

  .cursor-ghost {
    display: none;
  }

  .observers {
    gap: clamp(0.8rem, 4vw, 1.6rem);
  }
}

.audio-toggle {
  position: fixed;
  right: var(--pad);
  bottom: calc(var(--pad) + env(safe-area-inset-bottom));
  z-index: 81;
  width: 28px;
  height: 28px;
  color: #163224;
  opacity: 0.8;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  user-select: none;
}

body.realm-medio .audio-toggle {
  color: #5c4a22;
}

.audio-toggle svg {
  width: 16px;
  height: 16px;
  margin: 6px auto 0;
  display: block;
}

.audio-toggle[data-enabled="true"] {
  color: var(--signal);
}

body.realm-medio .audio-toggle[data-enabled="true"] {
  color: var(--gold);
}

.audio-toggle[data-enabled="false"] .audio-toggle__waves {
  opacity: 0.25;
}

body.is-record-open .audio-toggle {
  color: #2f6144;
}

.audio-notice {
  position: fixed;
  left: 50%;
  bottom: calc(var(--pad) + 2.8rem + env(safe-area-inset-bottom));
  z-index: 82;
  width: min(28rem, 86vw);
  margin: 0;
  text-align: center;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: clamp(0.72rem, 2vw, 0.84rem);
  font-weight: 300;
  letter-spacing: 0.12em;
  line-height: 1.75;
  color: #6d8a76;
  opacity: 0;
  transform: translateX(-50%) translateY(8px);
  pointer-events: none;
  transition: opacity 1.4s var(--ease-out), transform 1.4s var(--ease-out);
}

.audio-notice.is-visible {
  opacity: 0.82;
  transform: translateX(-50%) translateY(0);
}

.audio-notice__tap {
  display: block;
  margin-top: 0.55rem;
  opacity: 0.78;
}

body.realm-medio .audio-notice {
  font-family: "Cormorant Garamond", "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-size: clamp(0.88rem, 2.3vw, 1.05rem);
  letter-spacing: 0.08em;
  color: #c4b48a;
}

body.is-record-open .audio-notice {
  opacity: 0;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .grain,
  .observer__scan,
  .obs-ring--outer,
  .obs-ring--mid,
  .obs-ring--iris,
  .obs-ring--seal,
  .obs-ticks,
  .obs-seal,
  .obs-ping,
  .obs-pupil,
  .obs-halo,
  .observer,
  .observer__svg {
    animation: none;
  }

  .shell {
    transform: none;
    filter: none;
  }
}