/* ==========================================================================
   ThetaRev — Sections
   Header, the three screens, the hero field and the footer.
   Values come from theme.css.
   ========================================================================== */

.page {
  width: 100%;
  max-width: var(--width-page);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---- Header -------------------------------------------------------------- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.brand {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-serif);
  font-weight: var(--font-serif-weight);
  font-size: 1.35rem;
  color: var(--color-ink);
  text-decoration: none;
}

.brand-mark {
  width: 26px;
  height: 26px;
}

.brand-mark ellipse {
  stroke: var(--color-accent);
}

.brand-mark line {
  stroke: var(--color-ink);
}

/* Easter egg: hovering the θ shows a note for a moment, then it fades. */
.brand-aside {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: var(--space-1);
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  letter-spacing: 0.06em;
  color: var(--color-accent-strong);
  opacity: 0;
  pointer-events: none;
}

.brand-mark:hover ~ .brand-aside {
  animation: aside-once var(--duration-aside) var(--ease-calm) 0.35s both;
}

@keyframes aside-once {
  0%   { opacity: 0; }
  20%  { opacity: 1; }
  75%  { opacity: 1; }
  100% { opacity: 0; }
}

/* ---- Screens (shared) ---------------------------------------------------- */

.screen {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-6) 0;
}

.screen + .screen {
  border-top: 1px solid var(--color-rule-faint);
}

/* ---- Screen 1: Intrigue -------------------------------------------------- */

.intrigue {
  min-height: calc(100svh - 5rem);
  padding-top: var(--space-4);
  gap: var(--space-5);
}

.intrigue h1 {
  font-size: var(--text-display);
}

.intrigue .lead {
  max-width: var(--width-text);
  margin-top: var(--space-4);
  font-size: var(--text-lead);
  color: var(--color-mist);
}

.intrigue-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.scroll-cue {
  color: var(--color-mist);
  text-decoration: none;
  font-size: 1.1rem;
}

/* ---- Hero field ---------------------------------------------------------- */
/* Without JavaScript (or with reduced motion) this is a static composition.
   js/field.js adds .is-animated and drives each bubble through CSS variables:
   --px, --py  position in px    --s  dot scale    --o  opacity            */

.field {
  position: relative;
  margin: 0;
}

.field-plot {
  position: relative;
  aspect-ratio: var(--field-ratio);
  border-left: 1px solid var(--color-rule);
  border-bottom: 1px solid var(--color-rule);
  /* faint horizontal guides */
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent calc(25% - 1px),
    var(--color-rule-faint) calc(25% - 1px),
    var(--color-rule-faint) 25%
  );
}

/* Expiry boundary: a faint dashed line at the right edge. */
.field-plot::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  border-right: 1px dashed var(--color-accent-glow);
}

.field-axis {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-2);
}

.field-axis .expiry {
  color: var(--color-accent-strong);
}

.field-note {
  margin-top: var(--space-3);
  text-align: right;
  opacity: 0.8;
}

/* Easter egg: the TIME label briefly reads "You found it." (js/eggs.js) */
.field-axis .label {
  transition: opacity 0.4s var(--ease-calm);
}

.field-axis .label.is-swapping {
  opacity: 0;
}

/* Easter egg: the note beside a bubble that reached expiry (js/field.js). */
.field-aside {
  position: absolute;
  left: 0;
  top: 0;
  transform: translate3d(var(--ax, 0), var(--ay, 0), 0) translate(calc(-100% - var(--space-2)), -50%);
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  letter-spacing: 0.06em;
  color: var(--color-accent-strong);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-reveal) var(--ease-calm);
}

.field-aside.is-visible {
  opacity: 1;
}

/* Its own label would cross the expiry line, so it steps aside. */
.field .bubble.is-at-expiry .bubble-label {
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--duration-reveal) var(--ease-calm),
    visibility 0s linear var(--duration-reveal);
}

/* Axis labels fade in a few seconds after the animation starts. */
.field.is-animated .field-axis,
.field.is-animated .field-note {
  opacity: 0;
  transition: opacity var(--duration-axes) var(--ease-calm);
}

.field.is-animated.axes-in .field-axis {
  opacity: 1;
}

.field.is-animated.axes-in .field-note {
  opacity: 0.8;
}

/* A bubble. Starting position and size are set per bubble in index.html:
   --x, --y   position on desktop (% of the field)
   --mx, --my position on phones
   --size     diameter                                                       */
.bubble {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--size);
  height: var(--size);
  transform: translate(-50%, -50%);
}

.field.is-animated .bubble {
  left: 0;
  top: 0;
  opacity: var(--o, 1);
  transform: translate3d(var(--px, 0), var(--py, 0), 0) translate(-50%, -50%);
  will-change: transform, opacity;
}

.bubble-dot {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid var(--color-accent-glow);
  background: radial-gradient(circle at 35% 35%, var(--color-accent-faint), transparent 70%);
  box-shadow: 0 0 28px var(--color-accent-faint);
  transform: scale(var(--s, 1));
  transition:
    border-color var(--duration-reveal) var(--ease-calm),
    box-shadow var(--duration-reveal) var(--ease-calm);
}

/* Warmer fill, faded in when the bubble is in focus. */
.bubble-dot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, var(--color-accent-glow), transparent 72%);
  opacity: 0;
  transition: opacity var(--duration-reveal) var(--ease-calm);
}

.bubble-label {
  position: absolute;
  /* sits just right of the dot, following its scale */
  left: calc(50% + 50% * var(--s, 1) + var(--space-2));
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  letter-spacing: 0.12em;
  color: var(--color-mist);
  opacity: 0.75;
  transition:
    color var(--duration-reveal) var(--ease-calm),
    opacity var(--duration-reveal) var(--ease-calm);
}

.field.is-animated .bubble-label {
  opacity: var(--label-faint);
}

/* θ annotation, hung below the ticker so the ticker never shifts. */
.bubble-signal {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 2px;
  color: var(--color-accent-strong);
  letter-spacing: 0.06em;
  opacity: 0;
  transition: opacity var(--duration-reveal) var(--ease-calm);
}

/* The one bubble currently "in focus". */
.bubble.is-prominent .bubble-dot {
  border-color: var(--color-accent);
  box-shadow: 0 0 40px var(--color-accent-glow);
}

.bubble.is-prominent .bubble-dot::after {
  opacity: 1;
}

.field .bubble.is-prominent .bubble-label {
  color: var(--color-ink);
  opacity: 1;
}

.bubble.is-prominent .bubble-signal {
  opacity: 1;
}

/* ---- Screen 2: Hint ------------------------------------------------------ */

.hint h2 {
  font-size: var(--text-headline);
}

.hint h2 span {
  display: block;
}

.hint .lead {
  max-width: var(--width-text);
  margin-top: var(--space-4);
  font-size: var(--text-lead);
  color: var(--color-mist);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin: var(--space-7) 0;
  padding: 0;
  list-style: none;
}

.pillars li {
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-rule);
}

.pillars .label {
  display: block;
  margin-bottom: var(--space-3);
}

.pillars .word {
  font-family: var(--font-serif);
  font-weight: var(--font-serif-weight);
  font-size: var(--text-title);
  color: var(--color-ink);
}

.closing {
  font-family: var(--font-serif);
  font-weight: var(--font-serif-weight);
  font-size: var(--text-title);
  color: var(--color-ink);
  line-height: 1.25;
}

.closing em {
  color: var(--color-accent-strong);
}

/* ---- Screen 3: Invitation ------------------------------------------------ */

.invitation {
  align-items: center;
  text-align: center;
  gap: var(--space-5);
}

.invitation h2 {
  font-size: var(--text-headline);
}

.invitation h2 span {
  display: block;
  color: var(--color-mist);
}

/* ---- Footer -------------------------------------------------------------- */

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-rule-faint);
}

/* Easter egg: looks like a plain label until hovered. */
.research-link {
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  transition: color var(--duration-quick) var(--ease-calm);
}

.research-link:hover {
  color: var(--color-ink);
}

/* ---- Dialogs (early access, research note) ------------------------------- */

.dialog {
  width: min(34rem, calc(100vw - 2 * var(--gutter)));
  padding: var(--space-6) var(--space-5) var(--space-5);
  border: 1px solid var(--color-rule);
  border-radius: 18px;
  background: var(--color-paper);
  color: var(--color-ink-soft);
  box-shadow: 0 24px 64px rgba(var(--ink-rgb), 0.16);
}

.dialog::backdrop {
  background: rgba(var(--ink-rgb), 0.28);
  backdrop-filter: blur(3px);
}

.dialog[open] {
  animation: dialog-in var(--duration-reveal) var(--ease-calm);
}

@keyframes dialog-in {
  from { opacity: 0; transform: translateY(8px); }
}

.dialog-close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 2rem;
  height: 2rem;
  border: 0;
  border-radius: 50%;
  background: none;
  color: var(--color-mist);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}

.dialog-close:hover {
  color: var(--color-ink);
}

.dialog h2 {
  margin: var(--space-3) 0 var(--space-4);
  font-size: var(--text-title);
  line-height: 1.2;
}

.dialog h2 span {
  display: block;
  color: var(--color-mist);
}

/* Research Note: the rest of the note, withheld. */
.note-redacted {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  line-height: 2;
  color: var(--color-rule);
  word-break: break-all;
}

.access-form {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.access-form input[type="email"] {
  flex: 1 1 12rem;
  min-width: 0;
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--color-rule);
  border-radius: 999px;
  background: var(--color-paper);
  color: var(--color-ink);
  font: inherit;
  font-size: var(--text-small);
}

.access-form input[type="email"]::placeholder {
  color: var(--color-mist);
}

.access-form input[type="email"]:focus-visible {
  outline: 1px solid var(--color-accent);
  outline-offset: 2px;
}

.access-form .button {
  cursor: pointer;
  font-family: inherit;
}

.access-form .button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.access-note,
.access-error {
  margin-top: var(--space-3);
  font-size: var(--text-small);
  color: var(--color-mist);
}

.access-error {
  color: var(--color-accent-strong);
}

@media (prefers-reduced-motion: reduce) {
  .dialog[open] {
    animation: none;
  }
}

/* ---- Phones -------------------------------------------------------------- */

@media (max-width: 40rem) {
  .field-plot {
    aspect-ratio: var(--field-ratio-mobile);
  }

  .bubble {
    left: var(--mx, var(--x));
    top: var(--my, var(--y));
    width: calc(var(--size) * var(--bubble-scale-mobile));
    height: calc(var(--size) * var(--bubble-scale-mobile));
  }

  .pillars {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5) var(--space-4);
    margin: var(--space-6) 0;
  }

  .site-footer {
    flex-direction: column;
  }
}