/* =========================================
   STAFF WRAPPED SANDBOX
   Uses colors_and_type.css variables
========================================= */

html {
  overflow-x: hidden;
}

body {
  margin: 0;
  padding: 0;
  overflow: hidden; /* Blocca scorrimento corpo principale */
  overflow-x: hidden;
  background-color: var(--bg-color);
  color: var(--rc-bone);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  height: 100vh;
}

/* -----------------------------------------
   BACKGROUNDS & PARTICLES
----------------------------------------- */
#canvas-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1; /* Blob Three.js — strato base */
  pointer-events: none;
}

/* -----------------------------------------
   KINETIC TYPOGRAPHY BACKGROUND
----------------------------------------- */
#kinetic-bg {
  position: absolute;
  inset: 0;
  z-index: 11; /* Sopra wrapped-ui (z-index 10), sotto bottoni (z-index 20) */
  overflow: hidden;
  pointer-events: none;
  /* Niente blend mode sul container — ogni parola gestisce il suo */
}

/*
 * Struttura a TRE livelli:
 * .kinetic-word (wrapper) è posizionato con left/top = CENTRO della zona (in px,
 *   calcolato/clampato via JS in base alla larghezza reale della parola, così non
 *   sbatte mai contro i bordi dello schermo) e ancorato con translate(-50%,-50%).
 * .kinetic-word-inner è il layout/font container e riceve l'animazione kineticSweep
 *   (lo scorrimento orizzontale della parola intera, entra da un lato / esce dall'altro).
 * .kinetic-letter (uno per carattere, generato via JS) porta il "trick" visivo
 *   (outline trasparente + blend difference) e la propria micro-animazione di
 *   assemblaggio: mentre la parola scorre in scena, le lettere si materializzano
 *   a cascata (blur -> nitido, skew -> 0; peso fisso a Black, vedi nota sotto),
 *   in sequenza sfalsata di ~35ms l'una dall'altra nella direzione di lettura
 *   coerente col lato da cui la parola sta entrando.
 */
.kinetic-word {
  position: absolute;
  transform: translate(-50%, -50%);
  pointer-events: none;
  will-change: transform;
}

.kinetic-word-inner {
  display: inline-block;
  font-family: var(--font-mega); /* Montserrat Black */
  font-size: 16vw; /* fallback: normalmente sovrascritto inline da player.js */
  font-weight: 900; /* peso fisso: vedi nota su .kinetic-letter */
  text-transform: uppercase;
  white-space: nowrap;
  pointer-events: none;
  will-change: transform, opacity;
  transform-origin: center center;
  /*
   * IL TRICK: fill trasparente + un finto contorno via text-shadow (NON
   * -webkit-text-stroke) + blend difference.
   * Perché text-shadow e non text-stroke: Montserrat (font variabile) costruisce
   * alcuni glifi al peso 900 con contorni interni sovrapposti — tecnica normale
   * per l'interpolazione variable-font, invisibile a riempimento pieno perché le
   * regole di fill li fondono in un'unica forma. Ma -webkit-text-stroke disegna
   * OGNI contorno singolarmente: quelli interni diventavano visibili come linee
   * a zigzag dentro le lettere (es. dentro la "R"), l'effetto "sdoppiato/wireframe"
   * segnalato. Il text-shadow multidirezionale invece copia la SILHOUETTE già
   * riempita (quindi già fusa correttamente) spostata in 8 direzioni: stesso
   * risultato visivo (contorno, fill trasparente) ma senza esporre i contorni interni.
   * Su sfondo nero (#1e1e1e): il fill è invisibile, vedi solo il finto contorno.
   * Su colori saturi (blob rosso/verde): difference rivela il complementare dentro le lettere.
   * color/text-shadow stanno qui (a livello di PAROLA, non di singola lettera)
   * apposta: sono ereditabili quindi arrivano comunque a ogni .kinetic-letter, ma
   * mix-blend-mode NON lo è — se lo mettessimo su ogni lettera, ogni lettera
   * differenzierebbe anche contro le lettere vicine (essendo ognuna il proprio
   * livello di compositing per via di filter/transform animati). Un solo blend,
   * sull'intera parola già assemblata, riproduce il contorno pulito originale.
   */
  color: transparent;
  --kinetic-outline: rgba(255, 255, 255, 0.75);
  text-shadow:
    1.5px 0 0 var(--kinetic-outline),
    -1.5px 0 0 var(--kinetic-outline),
    0 1.5px 0 var(--kinetic-outline),
    0 -1.5px 0 var(--kinetic-outline),
    1.06px 1.06px 0 var(--kinetic-outline),
    -1.06px 1.06px 0 var(--kinetic-outline),
    1.06px -1.06px 0 var(--kinetic-outline),
    -1.06px -1.06px 0 var(--kinetic-outline);
  mix-blend-mode: difference;
}

.kinetic-letter {
  display: inline-block;
  pointer-events: none;
  /* Peso FISSO a Black: animarlo cambiava la larghezza di ogni lettera ad ogni
     frame (i glifi Black sono più larghi dei Thin), facendo "ballare"/sovrapporre
     le lettere inline-block adiacenti. blur/skew/opacity/translate non toccano
     il layout (solo compositing), quindi restano fluidi senza rompere il testo. */
  font-weight: 900;
  will-change: opacity, filter, transform;
}

/*
 * Animazione della PAROLA: scorrimento ORIZZONTALE puro, in un'unica direzione
 * monotona (entra da un lato dello schermo, sosta ferma, esce dall'altro lato) —
 * niente rotazione/scala/deriva verticale che cambia segno a metà corsa: era
 * proprio quell'andirivieni multi-asse a leggersi come uno "scatto" innaturale.
 * 3 fasi via keyframe:
 *   0%->22%  ingresso: decelerazione morbida (expo-out) verso il punto di sosta
 *   22%->78% sosta: nessun movimento (la parola resta ferma e leggibile)
 *   78%->100% uscita: accelerazione morbida (quart-in) verso il lato opposto
 */
@keyframes kineticSweep1 { /* entra da sinistra, esce a destra */
  0%   { transform: translateX(-115vw); opacity: 0; animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1); }
  22%  { transform: translateX(0); opacity: 1; }
  78%  { transform: translateX(0); opacity: 1; animation-timing-function: cubic-bezier(0.7, 0, 0.84, 0); }
  100% { transform: translateX(115vw); opacity: 0; }
}

@keyframes kineticSweep2 { /* entra da destra, esce a sinistra */
  0%   { transform: translateX(115vw); opacity: 0; animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1); }
  22%  { transform: translateX(0); opacity: 1; }
  78%  { transform: translateX(0); opacity: 1; animation-timing-function: cubic-bezier(0.7, 0, 0.84, 0); }
  100% { transform: translateX(-115vw); opacity: 0; }
}

@keyframes kineticSweep3 { /* entra da sinistra, esce a destra (ampiezza più corta) */
  0%   { transform: translateX(-90vw); opacity: 0; animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1); }
  22%  { transform: translateX(0); opacity: 1; }
  78%  { transform: translateX(0); opacity: 1; animation-timing-function: cubic-bezier(0.7, 0, 0.84, 0); }
  100% { transform: translateX(90vw); opacity: 0; }
}

/*
 * Animazione delle SINGOLE LETTERE: "assemblaggio" sincronizzato con le stesse
 * 4 tappe della parola (0/22/78/100%), ma su proprietà diverse — blur e un lieve
 * skew che si appiattisce. Il peso resta FISSO a Black (vedi .kinetic-letter):
 * animarlo cambiava la larghezza dei glifi ad ogni frame e faceva "ballare" le
 * lettere adiacenti. blur/skew/translate sono solo compositing, non toccano il
 * layout. Ogni lettera parte con un piccolo ritardo (animation-delay, ~35ms x
 * indice) rispetto alle altre, creando la cascata. Le due varianti (L/R)
 * inclinano la lettera nel verso coerente col lato di ingresso della parola.
 */
@keyframes kineticLetterInL { /* parola che entra da sinistra */
  0%   { opacity: 0; filter: blur(9px); transform: skewX(14deg) translateY(0.05em); }
  22%  { opacity: 1; filter: blur(0); transform: skewX(0deg) translateY(0); animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1); }
  78%  { opacity: 1; filter: blur(0); transform: skewX(0deg) translateY(0); animation-timing-function: cubic-bezier(0.7, 0, 0.84, 0); }
  100% { opacity: 0; filter: blur(7px); transform: skewX(-10deg) translateY(-0.04em); }
}

@keyframes kineticLetterInR { /* parola che entra da destra */
  0%   { opacity: 0; filter: blur(9px); transform: skewX(-14deg) translateY(0.05em); }
  22%  { opacity: 1; filter: blur(0); transform: skewX(0deg) translateY(0); animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1); }
  78%  { opacity: 1; filter: blur(0); transform: skewX(0deg) translateY(0); animation-timing-function: cubic-bezier(0.7, 0, 0.84, 0); }
  100% { opacity: 0; filter: blur(7px); transform: skewX(10deg) translateY(-0.04em); }
}

#snow-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

#bg-gradient {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: transparent; /* Canvas Three.js gestisce lo sfondo */
  pointer-events: none;
}

/* -----------------------------------------
   DYNAMIC LYRICS
----------------------------------------- */
#lyrics-wrapper {
  position: absolute;
  inset: 0;
  z-index: 5; /* In the background, below #wrapped-ui controls and cover */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  pointer-events: none;
  mask-image: linear-gradient(to bottom, transparent 10%, black 50%, transparent 90%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 10%, black 50%, transparent 90%);
}

#lyrics-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.6s var(--ease-fluid);
}

.lyric-line {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  font-size: 5vw;
  font-weight: 900;
  line-height: 1.1;
  opacity: 0.15;
  transform: scale(0.8) translateY(40px);
  transition: all 0.6s var(--ease-fluid);
  margin: var(--s-4) 0;
  color: var(--rc-bone);
  filter: blur(4px);
}

.lyric-line.active {
  opacity: 0.95;
  transform: scale(1) translateY(0);
  filter: blur(0px);
}

/* --- EXPLODING SPLIT CROSSFADE --- */
.lyric-united {
  position: absolute;
  width: 100vw;
  text-align: center;
  padding: 0 5vw;
  box-sizing: border-box;
  opacity: 1;
  transform: scale(1);
  transition: all 0.6s var(--ease-fluid);
}

.lyric-split {
  display: flex;
  width: 100vw;
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.6s var(--ease-fluid);
  pointer-events: none;
}

.lyric-left {
  flex: 1 1 0;
  text-align: right;
  padding-right: 2vw;
  word-wrap: break-word;
}

.lyric-gap {
  width: 35vw;
  flex: 0 0 35vw;
}

.lyric-right {
  flex: 1 1 0;
  text-align: left;
  padding-left: 2vw;
  word-wrap: break-word;
}

/* When in the center blob zone */
.lyric-line.split .lyric-united {
  opacity: 0;
  transform: scale(1.2) translateY(-10px);
  filter: blur(10px);
}
.lyric-line.split .lyric-split {
  opacity: 1;
  transform: scale(1) translateY(0);
}


/* -----------------------------------------
   INTRO OVERLAY
----------------------------------------- */
#intro-overlay {
  position: absolute;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent; /* Il Three.js canvas sotto fornisce lo sfondo */
  transition: opacity 1.5s var(--ease-out), visibility 1.5s;
  overflow: hidden;
}


/* Mesh Background - RIMOSSO: usare sfondo piatto */



/* Circular Wrapped Text */
.intro-wrapped-circle {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1;
  pointer-events: none;
  max-width: 100vw;
  overflow: hidden;
}

.wrapped-path-svg {
  width: 120vh; /* Scaled to screen height */
  height: 120vh;
  min-width: 300px; /* Ridotto per mobile per evitare overflow mostruoso */
  max-width: 100vw;
  overflow: hidden;
  animation: spin-slow 25s linear infinite;
}

.wrapped-svg-text {
  fill: rgba(255, 255, 255, 0.10);
  font-family: var(--font-mega);
  font-size: 65px;
  font-weight: 900; /* Montserrat Black */
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.intro-content {
  text-align: center;
  max-width: 800px;
  padding: var(--s-7) var(--s-6);
  z-index: 2;
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  transform: translateY(0px);
}

.intro-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 8vw, 5rem);
  line-height: var(--lh-snug);
  letter-spacing: -0.02em; /* Tighter for Syne */
  text-transform: uppercase;
  margin: 0 0 var(--s-5) 0;
  text-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.intro-line {
  display: block;
}

.intro-name-line {
  color: var(--rc-red);
}

/* Roulette slot machine */
.name-roulette-mask {
  display: inline-block;
  height: 1.1em;
  overflow: hidden;
  vertical-align: bottom;
  position: relative;
}

.name-roulette {
  display: flex;
  flex-direction: column;
  /* Rimosso transition per evitare conflitti con requestAnimationFrame JS */
}

.name-roulette .roulette-name {
  height: 1.1em;
  line-height: 1.1em;
  flex-shrink: 0;
  white-space: nowrap;
}

.intro-subtitle {
  opacity: 0.9;
  margin-bottom: var(--s-7);
  font-size: clamp(0.85rem, 2vw, 1.1rem);
  text-shadow: 0 2px 12px rgba(0,0,0,0.9), 0 0 40px rgba(0,0,0,0.9);
}

#start-btn {
  background: rgba(0,0,0,0.6);
  color: var(--rc-bone);
  border: 1px solid var(--rc-bone);
  padding: var(--s-5) var(--s-7);
  border-radius: var(--r-0);
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-body);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  transition: transform var(--dur-base) var(--ease-snap), background var(--dur-fast), color var(--dur-fast);
}

#start-btn:hover {
  transform: translateY(-4px);
  background: var(--rc-bone);
  color: var(--rc-ink);
}

/* Cover Explosion - Dynamic Grid (5x5 desktop, 3x6 mobile) */
#cover-explosion {
  position: absolute;
  inset: 0;
  z-index: 15;
  display: grid;
  grid-template-columns: repeat(var(--explosion-cols, 5), 1fr);
  grid-template-rows: repeat(var(--explosion-rows, 5), 1fr);
  gap: 0;
  overflow: hidden;
}

#cover-explosion.hidden {
  display: none;
}

#cover-explosion img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1);
  opacity: 1;
  transition: transform 0.8s cubic-bezier(0.8, 0, 0.2, 1), opacity 0.6s ease;
  will-change: transform, opacity;
}

#cover-explosion img.falling {
  transform: scale(0) rotate(var(--fall-rotate, 0deg));
  opacity: 0;
}

/* Stato di PARTENZA (specchio di .falling): la copertina nasce già "caduta"
   (scala 0, ruotata, invisibile) e viene rivelata con lo stesso identico
   stagger diagonale usato poi per farla cadere — così entra ed esce esattamente
   nello stesso modo, invece di comparire di scatto e sparire con un'animazione. */
#cover-explosion img.entering {
  transform: scale(0) rotate(var(--fall-rotate, 0deg));
  opacity: 0;
}

/* -----------------------------------------
   MAIN UI
----------------------------------------- */
#wrapped-ui {
  position: relative;
  z-index: 20; /* Sopra kinetic-bg e lyrics-wrapper */
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--s-5);
  box-sizing: border-box;
  transition: opacity 1s var(--ease-fluid);
}

#wrapped-ui.hidden {
  opacity: 0;
  pointer-events: none;
}

/* Top Bar */
.top-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--s-3);
  padding-top: var(--s-4);
  position: relative;
  z-index: 20; /* Sopra kinetic-bg */
}

.track-index {
  opacity: 0.5;
}

/* Progress Bar */
.progress-bar-track {
  width: 120px;
  height: 2px;
  background: rgba(255,255,255,0.1);
  border-radius: 1px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 4%;
  background: var(--primary-color, var(--rc-red));
  border-radius: 1px;
  transition: width 0.6s var(--ease-fluid), background 1s;
}

/* Center Content */
.center-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--s-5);
  position: relative;
  z-index: 20; /* Sopra kinetic-bg */
}

.transition-hide {
  opacity: 0 !important;
  transform: scale(0.95) translateY(10px) !important;
}

.track-meta {
  text-align: center;
  margin-top: 0;
  transition: opacity 0.4s var(--ease-fluid), transform 0.4s var(--ease-fluid);
}
.track-meta #track-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 4.5rem);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-display);
  margin: 0 0 4px 0;
  max-width: 80vw;
  margin-left: auto;
  margin-right: auto;
  text-transform: uppercase;
}
.track-meta #track-artist {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-lead);
  letter-spacing: var(--ls-tight);
  color: var(--fg2);
  margin: 0;
}

.track-subtitle {
  display: block;
  margin-top: var(--s-1);
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--fs-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--rc-bone);
  opacity: 0.7;
}

.cover-wrapper {
  width: 300px;
  height: 300px;
  border-radius: var(--r-0);
  overflow: hidden;
  border: 1px solid var(--line);
  transition: all 0.5s var(--ease-out);
}

.cover-placeholder {
  width: 100%;
  height: 100%;
  background: var(--rc-ink);
  transition: background 1s var(--ease-brutal);
}

.cover-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}



/* Action Bar */
.action-bar {
  display: flex;
  justify-content: center;
  gap: var(--s-4);
  padding-bottom: var(--s-4);
  position: relative;
  z-index: 20; /* Sopra kinetic-bg */
}

.action-btn {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  background: transparent;
  color: var(--rc-bone);
  border: 1.5px solid var(--line-strong, rgba(255,255,255,0.25));
  padding: var(--s-3) var(--s-5);
  border-radius: 0;
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-btn:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

.action-btn:focus-visible {
  outline: 2px solid var(--rc-bone);
  outline-offset: 4px;
}

.action-btn.liked svg {
  fill: var(--rc-red);
  stroke: var(--rc-red);
  animation: heart-pop 0.3s var(--ease-snap);
}

@keyframes heart-pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

.spotify-btn {
  background: var(--primary-color, #1DB954);
  border-color: var(--primary-color, #1DB954);
  color: #000000;
  text-decoration: none;
  border-radius: 0;
  box-shadow: none;
}
.spotify-btn:hover {
  background: var(--secondary-color, #1ed760);
  border-color: var(--secondary-color, #1ed760);
  color: #000000;
  box-shadow: none;
}

/* Toast Affinità Musicale con lo Speaker (Bordi netti, identità RC) */
.rc-match-toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--rc-ink, #1e1e1e);
  border: 2px solid var(--rc-red, #db3849);
  border-radius: 0;
  box-shadow: none;
  padding: 14px 20px;
  z-index: 999999;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  max-width: 92vw;
  width: 380px;
  box-sizing: border-box;
}
.rc-match-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.rc-match-toast__badge {
  font-family: var(--font-display, 'Syne', sans-serif);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--rc-red, #db3849);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.rc-match-toast__body {
  font-family: var(--font-display, 'Syne', sans-serif);
  font-size: 13.5px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.4;
  margin-bottom: 4px;
}
.rc-match-toast__body strong {
  color: var(--rc-red, #db3849);
}
.rc-match-toast__track {
  font-family: var(--font-body, 'DM Sans', sans-serif);
  font-size: 12px;
  color: #c8c8d0;
  font-style: italic;
}

/* -----------------------------------------
   END OVERLAY
----------------------------------------- */
#end-overlay {
  position: absolute;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--rc-ink);
  transition: opacity 2s var(--ease-fluid), visibility 2s;
  text-align: center;
  padding: var(--s-5);
  overflow: hidden;
}

.end-content {
  position: relative;
  z-index: 2;
}

.end-content h2 {
  font-size: clamp(2rem, 6vw, 4rem);
  margin-bottom: var(--s-5);
}

.end-recap {
  font-family: var(--font-body);
  font-size: var(--fs-body-lg);
  opacity: 0.6;
  margin-bottom: var(--s-5);
  line-height: var(--lh-loose);
}

.end-next {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  opacity: 0.35;
}

#end-overlay.hidden {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

/* -----------------------------------------
   TRACK TRANSITION OVERLAY
----------------------------------------- */
#track-transition {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: var(--rc-ink);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 1.2s ease-in-out;
}

#track-transition.hidden {
  opacity: 0;
  pointer-events: none;
}

.transition-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--primary-color, var(--rc-red));
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* -----------------------------------------
   MOBILE OPTIMIZATIONS & FLUID RESPONSIVENESS
----------------------------------------- */
@media (max-width: 768px), (max-height: 720px) {
  body {
    height: 100dvh;
    min-height: -webkit-fill-available;
  }

  #wrapped-ui {
    padding: var(--s-3);
    height: 100dvh;
    min-height: -webkit-fill-available;
  }

  .intro-content {
    padding: var(--s-5) var(--s-4);
    max-width: 92vw;
  }

  .intro-title {
    font-size: clamp(1.8rem, 7.5vw, 3rem);
    margin-bottom: var(--s-4);
  }

  .cover-wrapper {
    width: min(220px, 55vw);
    height: min(220px, 55vw);
  }

  .track-meta #track-title {
    font-size: clamp(1.35rem, 5.8vw, 2.2rem);
    max-width: 92vw;
    margin-bottom: 2px;
  }

  .track-meta #track-artist {
    font-size: var(--fs-base);
  }

  .center-content {
    gap: var(--s-3);
  }

  .action-bar {
    gap: var(--s-3);
    padding-bottom: max(var(--s-3), env(safe-area-inset-bottom, 12px));
    flex-wrap: wrap;
  }

  .action-btn {
    padding: 10px 16px;
    font-size: 13px;
    min-height: 44px;
  }

  #cover-explosion {
    --explosion-cols: 3;
    --explosion-rows: 6;
  }

  .lyric-line {
    font-size: clamp(1.15rem, 5vw, 1.75rem) !important;
    width: 92vw !important;
    margin: var(--s-3) 0 !important;
  }

  .lyric-united {
    position: relative !important;
    width: 92vw !important;
    padding: 0 10px !important;
    font-size: inherit !important;
    opacity: 0.9 !important;
    filter: none !important;
    transform: none !important;
  }

  .lyric-split, .lyric-gap {
    display: none !important;
  }

  .lyric-line.split .lyric-united {
    opacity: 0.95 !important;
    transform: none !important;
    filter: none !important;
  }

  .cover-wrapper {
    width: min(240px, 62vw);
    height: min(240px, 62vw);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.65);
  }

  /* Reduce filter GPU cost on mobile to maintain 60fps */
  .kinetic-letter {
    filter: none !important;
  }

  .kinetic-word-inner {
    font-size: 19vw;
    text-shadow:
      1px 0 0 var(--kinetic-outline),
      -1px 0 0 var(--kinetic-outline),
      0 1px 0 var(--kinetic-outline),
      0 -1px 0 var(--kinetic-outline);
  }
}

@media (max-height: 600px) {
  .cover-wrapper {
    width: 140px;
    height: 140px;
  }
  .track-meta #track-title {
    font-size: 1.25rem;
  }
  .center-content {
    gap: var(--s-2);
  }
}