/* =========================================================================
   Failsworth — styles
   Palette: charcoal #454851 · yellow #e9de49 · red #db2955
            white #f4faff   · blue #2ca6a4
   ========================================================================= */

:root {
  --charcoal: #454851;
  --yellow:   #e9de49;
  --red:      #db2955;
  --white:    #f4faff;
  --blue:     #2ca6a4;

  /* Dark-mode surfaces derived from the charcoal */
  --bg:   #1b1c21;
  --bg-2: #25272d;

  --font-body: 'Zilla Slab', Rockwell, 'Roboto Slab', Georgia, serif;
  --font-h1:   'Rye', 'Bungee', Georgia, serif;
  --font-h2a:  'Shrikhand', 'Rye', Georgia, serif;
  --font-h2b:  'Bungee', Impact, sans-serif;
  --font-ui:   'Bungee', Impact, sans-serif;

  --glow-c: var(--yellow);

  color-scheme: dark;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: clamp(1.3rem, 0.95rem + 1.3vw, 2.1rem);
  line-height: 1.35;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.locked { overflow: hidden; }

main { overflow-x: clip; }

::selection { background: var(--yellow); color: var(--bg); }

/* ---------- Background ---------------------------------------------------- */

#bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

#bg .rays {
  position: absolute;
  left: 50%;
  top: 115%;
  width: 260vmax;
  height: 260vmax;
  margin: -130vmax 0 0 -130vmax;
  background: repeating-conic-gradient(rgba(69, 72, 81, 0.45) 0deg 7.5deg, transparent 7.5deg 15deg);
  will-change: transform;
}

#bg .glow {
  position: absolute;
  inset: 0;
  background-color: var(--glow-c);
  -webkit-mask-image: radial-gradient(ellipse 65% 55% at 50% 45%, #000 0%, transparent 72%);
          mask-image: radial-gradient(ellipse 65% 55% at 50% 45%, #000 0%, transparent 72%);
  opacity: 0.11;
  transition: background-color 1.4s ease;
}

#bg .vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 45%, rgba(0, 0, 0, 0.6) 100%);
}

#progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 40;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--blue), var(--yellow), var(--red));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- Lander -------------------------------------------------------- */

#lander {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(ellipse at 50% 40%, rgba(233, 222, 73, 0.10), transparent 60%),
    repeating-conic-gradient(from 0deg at 50% 120%, rgba(69, 72, 81, 0.35) 0deg 7.5deg, transparent 7.5deg 15deg),
    var(--bg);
  transition: opacity 0.7s ease, visibility 0.7s;
}

#lander.gone { opacity: 0; visibility: hidden; }

.lander-inner { text-align: center; max-width: 40rem; }

.lander-kicker {
  margin: 0 0 0.4em;
  font-family: var(--font-ui);
  font-size: 0.7em;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--blue);
}

.lander-title {
  margin: 0;
  font-family: var(--font-h1);
  font-weight: 400;
  font-size: clamp(3rem, 1rem + 11vw, 9.5rem);
  line-height: 1;
  color: var(--yellow);
  text-shadow: 0.04em 0.04em 0 var(--red), 0.08em 0.08em 0 var(--blue);
  animation: lander-bob 2.6s ease-in-out infinite;
}

.lander-text { margin: 0.9em 0 1.4em; font-size: 0.95em; }

.lander-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: center;
}

.btn {
  font: inherit;
  font-family: var(--font-ui);
  font-size: clamp(0.95rem, 0.8rem + 0.6vw, 1.25rem);
  padding: 0.85em 1.4em;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover { transform: translateY(-2px) rotate(-1deg); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }

.btn-primary {
  background: var(--yellow);
  color: var(--bg);
  border: 0;
  box-shadow: 0.25em 0.25em 0 var(--red);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(244, 250, 255, 0.5);
}

@keyframes lander-bob {
  0%, 100% { transform: rotate(-2deg) translateY(0); }
  50%      { transform: rotate(2deg) translateY(-0.06em); }
}

/* ---------- Floating UI --------------------------------------------------- */

.mute {
  position: fixed;
  right: clamp(0.8rem, 2vw, 1.5rem);
  bottom: clamp(0.8rem, 2vw, 1.5rem);
  z-index: 50;
  width: 3.4rem;
  height: 3.4rem;
  border-radius: 50%;
  border: 2px solid var(--yellow);
  background: var(--bg-2);
  color: var(--white);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0.2rem 0.2rem 0 var(--red);
}

.mute[aria-pressed="true"] { border-color: var(--charcoal); box-shadow: 0.2rem 0.2rem 0 var(--charcoal); }
.mute:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }

.nudge {
  position: fixed;
  left: 50%;
  bottom: 1.4rem;
  z-index: 45;
  padding: 0.55em 1.1em;
  border-radius: 999px;
  background: var(--red);
  color: var(--white);
  font-family: var(--font-ui);
  font-size: clamp(0.8rem, 0.7rem + 0.4vw, 1rem);
  white-space: nowrap;
  opacity: 0;
  transform: translate(-50%, 1.5rem);
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none;
}

.nudge.show {
  opacity: 1;
  transform: translate(-50%, 0);
  animation: nudge-bounce 1.2s ease-in-out 0.4s infinite;
}

@keyframes nudge-bounce {
  0%, 100% { transform: translate(-50%, 0); }
  50%      { transform: translate(-50%, -0.4rem); }
}

/* ---------- Scenes -------------------------------------------------------- */
/* Each scene is tall; its .pin sticks to the screen while the extra height
   is "spent" on animation. --len is the scene height in screen-heights. */

.scene {
  position: relative;
  height: calc(var(--len, 2.2) * 100vh);
}

.scene.chapter { --len: 2.6; }
.scene.short   { --len: 1.8; }
.scene.joke    { --len: 18; }
.scene.finale  { --len: 2.3; }

.pin {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh;
  max-width: 1240px;
  margin: 0 auto;
  padding: clamp(1.25rem, 6vw, 5.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: clamp(1rem, 3.5vh, 2.6rem);
}

.scene[data-align="left"]  .pin { align-items: flex-start; text-align: left; }
.scene[data-align="right"] .pin { align-items: flex-end;   text-align: right; }

/* ---------- Headings ------------------------------------------------------ */

.fx {
  --c: var(--yellow);
  --s1: var(--red);
  --s2: var(--blue);
  margin: 0;
  max-width: 17ch;
  font-weight: 400;
  line-height: 1.08;
  color: var(--c);
  text-shadow: 0.045em 0.045em 0 var(--s1), 0.09em 0.09em 0 var(--s2);
  transform: rotate(var(--tilt, 0deg));
}

h1.fx {
  font-family: var(--font-h1);
  font-size: clamp(2.1rem, 0.8rem + 6vw, 7.4rem);
}

h2.fx {
  font-family: var(--font-h2a);
  font-size: clamp(1.9rem, 0.9rem + 4.6vw, 5.6rem);
}

h2.fx.alt {
  font-family: var(--font-h2b);
  line-height: 1.12;
}

/* Words never break mid-word; letters are individually animated */
.fx .w  { display: inline-block; white-space: nowrap; }
.fx .ch { display: inline-block; opacity: 0; will-change: transform, opacity; }

/* Idle motion once a heading has fully landed */
.fx.settled[data-idle="wobble"] { animation: idle-wobble 2.8s ease-in-out infinite; }
.fx.settled[data-idle="bob"]    { animation: idle-bob 2.2s ease-in-out infinite; }
.fx.settled[data-idle="pulse"]  { animation: idle-pulse 1.6s ease-in-out infinite; }
.fx.settled[data-idle="jitter"] { animation: idle-jitter 0.5s steps(2, end) infinite; }

@keyframes idle-wobble {
  0%, 100% { transform: rotate(var(--tilt, 0deg)); }
  50%      { transform: rotate(calc(var(--tilt, 0deg) * -1)); }
}
@keyframes idle-bob {
  0%, 100% { transform: rotate(var(--tilt, 0deg)) translateY(0); }
  50%      { transform: rotate(var(--tilt, 0deg)) translateY(-0.08em); }
}
@keyframes idle-pulse {
  0%, 100% { transform: rotate(var(--tilt, 0deg)) scale(1); }
  50%      { transform: rotate(var(--tilt, 0deg)) scale(1.035); }
}
@keyframes idle-jitter {
  0%   { transform: rotate(var(--tilt, 0deg)) translate(0, 0); }
  50%  { transform: rotate(calc(var(--tilt, 0deg) + 0.6deg)) translate(0.015em, -0.015em); }
  100% { transform: rotate(var(--tilt, 0deg)) translate(-0.015em, 0.01em); }
}

/* ---------- Body text ----------------------------------------------------- */

.reveal {
  margin: 0;
  max-width: 30ch;
}

.reveal .wd { display: inline-block; opacity: 0.12; }

.reveal em {
  font-style: italic;
  font-weight: 700;
  color: var(--blue);
}

.reveal strong {
  font-weight: 700;
  color: var(--yellow);
}

.reveal a {
  color: var(--red);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--yellow);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.15em;
}

.reveal a:hover { color: var(--yellow); }

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 4vh;
  margin: 0;
  transform: translateX(-50%);
  font-family: var(--font-ui);
  font-size: 0.55em;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--white);
  opacity: 0;
}

.scroll-hint span { display: inline-block; animation: hint-bounce 1.1s ease-in-out infinite; }

@keyframes hint-bounce {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(0.35em); }
}

/* ---------- Act VI: the "keep scrolling" joke ----------------------------- */

.joke .pin {
  display: grid;
  place-items: center;
  max-width: none;
}

.joke .pin > * { grid-area: 1 / 1; }

.joke-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(1rem, 3vh, 2rem);
  max-width: 1240px;
  transform-origin: 50% 0;
}

.nags {
  position: relative;
  align-self: stretch;
  justify-self: stretch;
  pointer-events: none;
}

.nag {
  position: absolute;
  left: 50%;
  top: var(--nag-y, 55%);
  width: min(92vw, 1100px);
  display: flex;
  justify-content: center;
  text-align: center;
  transform: translate(-50%, -50%);
  visibility: hidden;
}

/* ---------- Finale -------------------------------------------------------- */

.again {
  font-family: var(--font-ui);
  font-size: 0.6em;
  color: var(--white);
  text-decoration: none;
  padding: 0.7em 1.3em;
  border: 2px solid rgba(244, 250, 255, 0.4);
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: border-color 0.2s, color 0.2s;
}

.again:hover { color: var(--yellow); border-color: var(--yellow); }

/* ---------- Reduced motion / no JavaScript -------------------------------- */
/* A normal, readable page: no pinning, no letter effects. */

.calm .scene, .no-js .scene { height: auto; }

.calm .pin, .no-js .pin {
  position: static;
  height: auto;
  min-height: 0;
  padding-block: 12vh;
}

.calm .joke .pin, .no-js .joke .pin { display: flex; flex-direction: column; }
.calm .nags, .no-js .nags { display: flex; flex-direction: column; gap: 2rem; align-items: center; }
.calm .nag, .no-js .nag { position: static; transform: none; visibility: visible; }
.calm .again, .no-js .again { opacity: 1; pointer-events: auto; }
.calm .scroll-hint, .no-js .scroll-hint { display: none; }
.calm .fx.settled { animation: none; }

.no-js #lander, .no-js .mute { display: none; }
.no-js body.locked { overflow: auto; }