/*
 * Immersive Styles - Khaos Factory
 * Full-viewport canvas experience: arrival, edge navigation, canvas UI.
 * Loaded only on immersive pages via base-canvas.html.
 */

/* ──────────────────────────────────────────
   Body: lock scroll, deep dark background
   ────────────────────────────────────────── */
body.immersive {
  overflow: hidden;
  background: #030405;
  height: 100vh;
  height: 100dvh;
}

/* Flash messages overlay the canvas */
body.immersive .flash-message {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
  max-width: 600px;
}

/* ──────────────────────────────────────────
   Full-viewport canvas
   ────────────────────────────────────────── */
.immersive__canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: #030405;
  touch-action: none;
  cursor: default;
  z-index: var(--z-base, 1);
}

/* Particle canvas element — rendered by JS */
.living-diagram-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 1;
  transition: opacity 0.6s ease;
}

/* MUST render above any decorative layers */
.immersive__canvas .living-diagram-canvas {
  z-index: 10;
}

/* ──────────────────────────────────────────
   Arrival overlay
   ────────────────────────────────────────── */
.arrival {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: #030405;
  animation: arrivalDissolve 4s ease-out 2.5s forwards;
  pointer-events: none;
}

.arrival.is-complete {
  display: none;
}

.arrival__content {
  text-align: center;
  display: grid;
  gap: 0.75rem;
}

.arrival__brand {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(200, 205, 214, 0.7);
  opacity: 0;
  animation: arrivalFadeIn 1.2s ease-out 0.3s forwards;
}

.arrival__tagline {
  margin: 0;
  font-size: clamp(0.85rem, 1.8vw, 1.1rem);
  letter-spacing: 0.35em;
  text-transform: lowercase;
  color: rgba(100, 110, 130, 0.5);
  opacity: 0;
  animation: arrivalFadeIn 1.5s ease-out 1.2s forwards;
}

@keyframes arrivalFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes arrivalDissolve {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    visibility: hidden;
  }
}

/* ──────────────────────────────────────────
   Edge navigation — auto-hiding controls at viewport edges
   ────────────────────────────────────────── */
.edge-nav {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: auto 1fr auto;
  padding: clamp(1rem, 2.5vw, 1.75rem);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.edge-nav.is-visible {
  opacity: 1;
}

.edge-nav.is-hidden-by-scene {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s ease;
}

/* Position children at grid edges */
.edge-nav__top-left {
  grid-row: 1;
  grid-column: 1;
  pointer-events: auto;
}

.edge-nav__top-right {
  grid-row: 1;
  grid-column: 3;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.edge-nav__bottom-left {
  grid-row: 3;
  grid-column: 1;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.edge-nav__bottom-right {
  grid-row: 3;
  grid-column: 3;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Brand mark */
.edge-nav__brand {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(200, 205, 214, 0.3);
  user-select: none;
}

/* Links and buttons */
.edge-nav__link {
  appearance: none;
  background: none;
  border: none;
  padding: 0.35rem 0;
  font-family: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(200, 205, 214, 0.3);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s ease;
}

.edge-nav__link:hover,
.edge-nav__link:focus-visible {
  color: rgba(200, 205, 214, 0.7);
}

/* Auth form inline */
.edge-nav__auth {
  display: inline;
}

/* Persistent anchor — always-visible dot hinting navigation exists */
.edge-nav__anchor {
  position: absolute;
  top: clamp(0.85rem, 2vw, 1.5rem);
  left: clamp(0.85rem, 2vw, 1.5rem);
  width: 5px;
  height: 5px;
  border-radius: 50%;
  border: none;
  background: rgba(80, 90, 110, 0.2);
  padding: 0;
  cursor: pointer;
  pointer-events: auto;
  opacity: 1;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.edge-nav__anchor:hover {
  background: rgba(80, 90, 110, 0.45);
  box-shadow: 0 0 6px rgba(80, 90, 110, 0.2);
}

/* Hide anchor when chrome is visible (chrome links take over) */
.edge-nav.is-visible .edge-nav__anchor {
  opacity: 0;
  pointer-events: none;
}

/* First-visit discovery — subtle pulse on chrome edges */
.edge-nav.is-discovering .edge-nav__link {
  animation: chromeDiscover 2s ease-in-out 2;
}

.edge-nav.is-discovering .edge-nav__brand {
  animation: chromeDiscover 2s ease-in-out 2;
}

@keyframes chromeDiscover {
  0%, 100% {
    color: rgba(200, 205, 214, 0.3);
  }
  50% {
    color: rgba(200, 205, 214, 0.55);
  }
}

/* ──────────────────────────────────────────
   Radial menu — Maya marking-menu style bloom
   ────────────────────────────────────────── */
.radial-menu {
  position: fixed;
  inset: 0;
  z-index: 25;
  pointer-events: none;
}

.radial-menu.is-active {
  pointer-events: auto;
}

.radial-menu__option {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 48px;
  padding: 0 1rem;
  border-radius: 999px;
  border: 1px solid rgba(196, 154, 90, 0.15);
  background: rgba(6, 8, 14, 0.8);
  color: rgba(200, 205, 214, 0.7);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
  cursor: pointer;
  transform: translate(-50%, -50%);
  opacity: 0;
  pointer-events: none;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.radial-menu__option:hover,
.radial-menu__option:focus-visible {
  border-color: rgba(196, 154, 90, 0.35);
  background: rgba(196, 154, 90, 0.08);
  color: #c49a5a;
}

.radial-menu__option--entering {
  animation: radialBloomIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  pointer-events: auto;
}

.radial-menu__option--leaving {
  animation: radialBloomOut 0.25s ease-in forwards;
  pointer-events: none;
}

@keyframes radialBloomIn {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) translate(0, 0) scale(0.3);
  }
  100% {
    opacity: 1;
    transform: translate(-50%, -50%) translate(var(--target-x), var(--target-y)) scale(1);
  }
}

@keyframes radialBloomOut {
  0% {
    opacity: 1;
    transform: translate(-50%, -50%) translate(var(--target-x), var(--target-y)) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) translate(0, 0) scale(0.3);
  }
}

/* ──────────────────────────────────────────
   Helper bubble — proactive messages from the helper
   ────────────────────────────────────────── */
.helper-bubble {
  position: fixed;
  z-index: 20;
  pointer-events: none;
  max-width: min(280px, 70vw);
  padding: 0.6rem 1rem;
  border-radius: 16px;
  border: 1px solid rgba(196, 154, 90, 0.1);
  background: rgba(6, 8, 14, 0.75);
  color: rgba(200, 205, 214, 0.65);
  font-size: 0.85rem;
  line-height: 1.5;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.helper-bubble.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.helper-bubble[hidden] {
  display: none;
}

.helper-bubble__text {
  margin: 0;
}

/* ──────────────────────────────────────────
   Reading resume banner (injected by reading-tracker.js)
   ────────────────────────────────────────── */
.reading-resume-banner {
  padding: 0.75rem 1.25rem;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(15, 23, 42, 0.8);
  margin-bottom: 1rem;
}

.reading-resume-banner__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.reading-resume-banner__content p {
  margin: 0;
  font-size: 0.9rem;
  color: rgba(226, 232, 240, 0.85);
}

.reading-resume-banner__actions {
  display: flex;
  gap: 0.5rem;
}

.reading-resume-banner__button {
  appearance: none;
  border: 1px solid rgba(100, 120, 160, 0.35);
  border-radius: 999px;
  background: rgba(100, 120, 160, 0.12);
  color: rgba(226, 232, 240, 0.9);
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.reading-resume-banner__button:hover {
  border-color: rgba(100, 120, 160, 0.55);
}

.reading-resume-banner__button--secondary {
  border-color: rgba(148, 163, 184, 0.3);
  background: transparent;
}

/* ──────────────────────────────────────────
   No-JS fallback
   ────────────────────────────────────────── */
.immersive__fallback {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  place-content: center;
  gap: 1.25rem;
  background: #030405;
  color: rgba(200, 205, 214, 0.65);
  text-align: center;
  padding: 2rem;
}

.immersive__fallback h1 {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(200, 205, 214, 0.7);
}

.immersive__fallback p {
  margin: 0;
  max-width: 28rem;
  line-height: 1.7;
  color: rgba(100, 110, 130, 0.6);
}

.immersive__fallback nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.immersive__fallback nav a {
  color: var(--color-primary, #8b9dc3);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.immersive__fallback nav a:hover {
  text-decoration: underline;
}

/* ──────────────────────────────────────────
   Responsive adjustments
   ────────────────────────────────────────── */
@media (max-width: 480px) {
  .edge-nav {
    padding: 0.75rem;
  }

  .edge-nav__bottom-left,
  .edge-nav__bottom-right {
    gap: 0.35rem;
  }
}