/* ===========================================================
   Mulholland Drive Scrollytelling — Stylesheet
   ========================================================= */

/* ----- Theme tokens (film-grounded palette) -----
   Sampled from the film's signature scenes:
   - Mulholland Drive at night (deep navy)
   - The blue box / Club Silencio (cinematic blue)
   - The red lampshade / Diane's apartment (oxblood)
   - Jitterbug stage (warm gold)
   - Betty's courtyard (pink-peach)
   ========================================================= */
:root {
  /* Base palette */
  --bg-deep: #0a0d18;
  --bg-paper: #14161f;
  --fg: #ece6d5;
  --fg-dim: #8a8275;
  --fg-mute: #5a5444;
  --rule: rgba(236, 230, 213, 0.10);
  --rule-strong: rgba(236, 230, 213, 0.22);

  /* Film accents */
  --dream-blue: #3b5fa4;
  --dream-blue-deep: #1c2a4e;
  --reality-red: #9b2926;
  --reality-red-deep: #4a0f0e;
  --memory-gold: #d4a155;
  --hollywood-pink: #dba8b9;
  --silencio-cyan: #4f8fb0;

  /* Themed (re-pointed when data-world changes) */
  --bg: var(--bg-deep);
  --bg-tint: rgba(59, 95, 164, 0.06);
  --accent: var(--dream-blue);
  --accent-deep: var(--dream-blue-deep);

  /* Typography */
  --serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  /* Layout */
  --max-w: 1280px;
  --gutter: clamp(1rem, 4vw, 3rem);
  --steps-w: min(34ch, 90vw);
  --scrubber-h: 56px;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --theme-dur: 900ms;
}

body[data-world="dream"] {
  --bg-tint: rgba(59, 95, 164, 0.07);
  --accent: var(--dream-blue);
  --accent-deep: var(--dream-blue-deep);
}

body[data-world="reality"] {
  --bg-tint: rgba(155, 41, 38, 0.09);
  --accent: var(--reality-red);
  --accent-deep: var(--reality-red-deep);
}

body[data-world="memory"] {
  --bg-tint: rgba(212, 161, 85, 0.07);
  --accent: var(--memory-gold);
  --accent-deep: #6a4f29;
}

body[data-world="hollywood"] {
  --bg-tint: rgba(219, 168, 185, 0.06);
  --accent: var(--hollywood-pink);
  --accent-deep: #6e4f5a;
}

/* ----- Reset ----- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; }
a { color: var(--accent); text-decoration: none; }

/* ----- Body shell ----- */
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.125rem);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--theme-dur) var(--ease-out);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 90% 60% at 50% 0%, var(--bg-tint), transparent 70%),
    radial-gradient(ellipse 100% 80% at 50% 100%, rgba(0, 0, 0, 0.5), transparent 60%);
  transition: background var(--theme-dur) var(--ease-out);
}

/* ----- Theme sweep overlay ----- */
#theme-sweep {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: 100vw;
  pointer-events: none;
  z-index: 9999;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.02) 35%,
    var(--accent) 50%,
    rgba(255, 255, 255, 0.02) 65%,
    transparent 100%
  );
  opacity: 0;
  transform: translateX(-100%);
  mix-blend-mode: screen;
}

#theme-sweep.sweeping {
  animation: sweep 1100ms var(--ease-in-out) forwards;
}

@keyframes sweep {
  0%   { opacity: 0; transform: translateX(-100%); }
  10%  { opacity: 0.5; }
  50%  { opacity: 0.7; }
  90%  { opacity: 0.35; }
  100% { opacity: 0; transform: translateX(100%); }
}

/* ===========================================================
   Sticky scrubber (film timestamp + scene)
   ========================================================= */
#scrubber {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--scrubber-h);
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 0 var(--gutter);
  background: rgba(10, 13, 24, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
  transform: translateY(-100%);
  transition: transform 400ms var(--ease-out);
}

#scrubber[data-active="true"] {
  transform: translateY(0);
}

.scrubber__time {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--fg);
  white-space: nowrap;
  margin-right: 1.5rem;
  min-width: 8ch;
}

.scrubber__scene {
  font-family: var(--serif);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--fg-dim);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.scrubber__phase {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 0.25em 0.7em;
  border: 1px solid var(--accent);
  border-radius: 2px;
  margin-left: 1rem;
  transition: color var(--theme-dur), border-color var(--theme-dur);
}

.scrubber__progress {
  position: absolute;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--accent);
  transition: width 250ms var(--ease-out), background var(--theme-dur);
  width: 0;
}

/* ===========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gutter);
}

.hero__inner {
  max-width: 64ch;
  text-align: center;
}

.hero__eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin: 0 0 2rem;
}

.hero__title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(2.5rem, 6vw + 1rem, 6rem);
  line-height: 1.05;
  margin: 0 0 2rem;
  letter-spacing: -0.02em;
}

.hero__title .accent {
  color: var(--accent);
  font-style: italic;
  font-weight: 400;
  transition: color var(--theme-dur) var(--ease-out);
}

.hero__lede {
  font-size: clamp(1.05rem, 1vw + 0.8rem, 1.35rem);
  color: var(--fg);
  line-height: 1.55;
  margin: 0 auto;
  max-width: 56ch;
}

.data-pill {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--bg-tint);
  border: 1px solid var(--rule);
  padding: 0.05em 0.5em;
  border-radius: 0.25em;
  white-space: nowrap;
}

.hero__scroll-hint {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-top: 4rem;
  animation: bob 2.4s var(--ease-in-out) infinite;
}

@keyframes bob {
  0%, 100% { transform: translateY(0); opacity: 0.7; }
  50%      { transform: translateY(0.4rem); opacity: 1; }
}

/* ===========================================================
   Section dividers
   ========================================================= */
.divider {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 8rem auto 3rem;
  padding: 0 var(--gutter);
  text-align: center;
}

.divider__eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin: 0 0 1rem;
}

.divider__title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(2rem, 4vw + 0.5rem, 3.5rem);
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin: 0 0 1.5rem;
  color: var(--fg);
}

.divider__title em {
  color: var(--accent);
  font-style: italic;
  font-weight: 400;
  transition: color var(--theme-dur);
}

.divider__lede {
  font-size: 1.1rem;
  max-width: 56ch;
  margin: 0 auto;
  color: var(--fg-dim);
  line-height: 1.65;
}

/* ===========================================================
   Scrollytelling sections — side-by-side layout
   Pattern: viz on left (sticky), steps on right (scrolling)
   ========================================================= */

.scrolly {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  max-width: var(--max-w);
  margin: 5rem auto 0;
  padding: 0 var(--gutter);
  align-items: start;
}

.scrolly__sticky {
  position: sticky;
  top: var(--scrubber-h);
  height: calc(100vh - var(--scrubber-h));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.scrolly__viz {
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scrolly__caption {
  position: absolute;
  bottom: 1rem;
  left: 0;
  right: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-dim);
  text-align: center;
  pointer-events: none;
  min-height: 1.2em;
}

.scrolly__steps {
  position: relative;
  z-index: 2;
  padding: 25vh 0 50vh;
}

.step {
  width: 100%;
  max-width: var(--steps-w);
  margin: 0 0 50vh;
  padding: 1.5rem 1.75rem;
  border-left: 2px solid var(--rule);
  background: rgba(20, 22, 31, 0.55);
  border-radius: 0 4px 4px 0;
  opacity: 0.45;
  transition:
    opacity 600ms var(--ease-out),
    border-color var(--theme-dur),
    background var(--theme-dur);
}

.step:last-child { margin-bottom: 25vh; }

.step.is-active {
  opacity: 1;
  border-left-color: var(--accent);
  background: rgba(20, 22, 31, 0.85);
}

.step__title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(1.4rem, 1vw + 1.1rem, 2rem);
  letter-spacing: -0.01em;
  margin: 0 0 0.75rem;
  line-height: 1.15;
}

.step__time {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
  transition: color var(--theme-dur);
}

.step p {
  margin: 0 0 0.7rem;
  color: var(--fg);
  font-size: 1rem;
  line-height: 1.55;
}

.step strong {
  color: var(--accent);
  font-weight: 600;
  transition: color var(--theme-dur);
}

.step em {
  font-family: var(--serif);
  font-style: italic;
  color: var(--fg);
}

.step__quote {
  margin: 0.75rem 0;
  padding: 0.5rem 0 0.5rem 0.9rem;
  border-left: 2px solid var(--accent);
  font-family: var(--serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--fg);
}

/* ===========================================================
   Visualizations — base styles per section
   ========================================================= */

.viz-placeholder {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-mute);
  border: 1px dashed var(--rule);
  padding: 4rem 2rem;
  border-radius: 6px;
  text-align: center;
}

/* Opening Hook — dual timeline */
#viz-opening svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.timeline-track-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  fill: var(--fg-dim);
}

.scene-block {
  transition: opacity 400ms var(--ease-out), transform 800ms var(--ease-out);
}

.scene-link {
  fill: none;
  stroke: var(--fg-mute);
  stroke-width: 1;
  stroke-opacity: 0.3;
  transition: stroke-opacity 800ms var(--ease-out), stroke 800ms var(--ease-out);
}

/* Walkthrough timeline poster */
.scene-poster {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  position: relative;
}

.scene-poster__num {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--fg-mute);
  margin-bottom: 0.5rem;
}

.scene-poster__title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(2rem, 4vw + 0.5rem, 3.75rem);
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin: 0 0 1.5rem;
  max-width: 18ch;
  color: var(--fg);
  transition: color var(--theme-dur);
}

.scene-poster__location {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
  transition: color var(--theme-dur);
}

.scene-poster__chip {
  display: inline-block;
  margin-top: 1.25rem;
  padding: 0.3em 0.9em;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
}

.scene-poster__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.3;
  background:
    radial-gradient(circle at 30% 30%, var(--accent) 0%, transparent 50%),
    radial-gradient(circle at 70% 70%, var(--accent-deep) 0%, transparent 60%);
  filter: blur(40px);
  transition: background var(--theme-dur);
}

/* Plot twist (the break) — full bleed */
.twist {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem var(--gutter);
  overflow: hidden;
}

.twist__overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at center, transparent 30%, var(--bg-deep) 80%);
}

.twist__inner {
  position: relative;
  max-width: 50ch;
}

.twist__eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.5rem;
  transition: color var(--theme-dur);
}

.twist__quote {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(1.8rem, 4vw + 0.5rem, 3.5rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 2rem;
}

.twist__lede {
  font-size: 1.1rem;
  color: var(--fg-dim);
  line-height: 1.6;
}

.twist--break {
  animation: glitch-frame 0.4s steps(2) 1 1.2s;
}

@keyframes glitch-frame {
  0%, 100% { transform: none; filter: none; }
  20%      { transform: translateX(-3px); filter: hue-rotate(15deg); }
  40%      { transform: translateX(3px); filter: hue-rotate(-15deg); }
  60%      { transform: translateY(-2px); filter: contrast(1.4); }
  80%      { transform: translateY(2px); filter: contrast(0.9); }
}

/* ===========================================================
   Conclusion
   ========================================================= */

.conclusion {
  position: relative;
  z-index: 1;
  max-width: 70ch;
  margin: 8rem auto 4rem;
  padding: 0 var(--gutter);
}

.conclusion__eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin: 0 0 1rem;
}

.conclusion__title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(2rem, 4vw + 0.5rem, 3rem);
  line-height: 1.15;
  margin: 0 0 2rem;
}

.conclusion__title em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

.conclusion p {
  font-size: 1.1rem;
  line-height: 1.7;
  margin: 0 0 1.25rem;
  color: var(--fg);
}

.conclusion h3 {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 2.5rem 0 0.75rem;
  transition: color var(--theme-dur);
}

.conclusion__hypothesis {
  margin-top: 3rem;
  padding: 2rem;
  border: 1px solid var(--rule-strong);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  background: rgba(20, 22, 31, 0.55);
}

/* ===========================================================
   Footer
   ========================================================= */

.footer {
  position: relative;
  z-index: 1;
  margin-top: 6rem;
  padding: 3rem var(--gutter) 4rem;
  border-top: 1px solid var(--rule);
  text-align: center;
}

.footer__sources,
.footer__credit {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--fg-mute);
  max-width: 70ch;
  margin: 0.4rem auto;
  line-height: 1.7;
}

.footer__credit {
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

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

@media (max-width: 900px) {
  .scrolly {
    grid-template-columns: 1fr;
  }
  .scrolly__sticky {
    height: 60vh;
    top: var(--scrubber-h);
  }
  .scrolly__steps {
    padding: 4vh 0 30vh;
  }
  .step { margin-bottom: 30vh; }
}