@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;700;900&display=swap');

:root {
    --spot-1: #ff0033; 
    --spot-2: #00adef;
    --spot-3: #ff7600;
    --text-color: #ffffff;
    --border-color: rgba(255, 255, 255, 0.95);
    --panel-bg: rgba(255, 255, 255, 0.06);
    --panel-border: rgba(255, 255, 255, 0.12);
}

* { box-sizing: border-box; }

html, body {
    margin: 0; padding: 0;
    width: 100%; height: 100%;
    overflow: hidden;
    background: #000;
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
}

/* Adjust the landing page heading size/style if needed */
.zune-text {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 2rem;
    letter-spacing: 1px;
    text-transform: none; /* Removes the forced uppercase from previous versions */
}

/* Style for your credit line */
.credit-footer {
    position: absolute;
    bottom: -60px; /* Positions it below the glass container */
    left: 0;
    right: 0;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4); /* Subtle grey */
    letter-spacing: 0.5px;
    text-align: center;
    font-weight: 300;
}
/* Fullscreen Button Styling */
#fullscreen-button {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--panel-border);
    color: white;
    padding: 10px;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.5s ease;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#fullscreen-button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

/* Hide button when in immersive mode */
body.immersive #fullscreen-button {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-20px);
}
/* --- BACKGROUND SYSTEM --- */
#bg-wrap {
    position: fixed; inset: 0; z-index: 0; overflow: hidden; background: #000;
}

.bg-layer {
    position: absolute; 
    top: -5%; 
    left: -5%; 
    width: 110%; 
    height: 110%;
    background-size: cover; 
    background-position: center center; 
    background-repeat: no-repeat;
    opacity: 0; 
    transform: scale(1.05);
    filter: blur(40px) brightness(0.4) saturate(1.1);
    transition: opacity 2.5s ease, filter 2.5s ease-in-out;
    /* Added transform here for hardware acceleration */
    will-change: opacity, filter, transform; 
}
.bg-layer.active { 
    opacity: 1; 
    animation: bgMainMove 60s ease-in-out infinite alternate; 
}

body.immersive .bg-layer.active {
    filter: blur(0px) brightness(0.25) saturate(0.8) grayscale(0.3);
}

/* --- UPDATED KEN BURNS ANIMATION --- */
@keyframes bgMainMove {
    0% {
        transform: scale(1.05) translate(0, 0);
    }
    33% {
        transform: scale(1.15) translate(-2%, 1%);
    }
    66% {
        transform: scale(1.1) translate(1%, -2%);
    }
    100% {
        transform: scale(1.2) translate(-1%, -1%);
    }
}

/* --- SPOTLIGHTS --- */
.spotlight-container {
    position: absolute; inset: 0; z-index: 1; opacity: 0.6;
    pointer-events: none; transition: opacity 3s ease-in-out;
    mix-blend-mode: color-dodge; 
}

.spotlight { position: absolute; width: 80vw; height: 80vw; border-radius: 50%; filter: blur(100px); opacity: 0.5; }
.s1 { background: radial-gradient(circle, var(--spot-1) 0%, transparent 70%); top: -10%; left: -10%; animation: sweep1 22s infinite alternate ease-in-out; }
.s2 { background: radial-gradient(circle, var(--spot-2) 0%, transparent 70%); bottom: -10%; right: -10%; animation: sweep2 28s infinite alternate ease-in-out; }
.s3 { background: radial-gradient(circle, var(--spot-3) 0%, transparent 70%); top: 20%; left: 20%; animation: sweep3 20s infinite alternate ease-in-out; }

@keyframes sweep1 { 0% { transform: translate(0, 0); } 100% { transform: translate(30vw, 20vh); } }
@keyframes sweep2 { 0% { transform: translate(0, 0); } 100% { transform: translate(-30vw, -20vh); } }
@keyframes sweep3 { 0% { transform: translate(0, 0); } 100% { transform: translate(-10vw, 10vh); } }

/* --- UI COMPONENTS --- */
#player-screen { width: 100%; height: 100%; position: relative; z-index: 2; }
.zune-layout { display: flex; align-items: center; gap: 40px; width: 100%; height: 100vh; padding: 8vh 8vw; }
#track-img { width: min(34vw, 450px); height: min(34vw, 450px); border: 2px solid var(--border-color); box-shadow: 0 30px 90px rgba(0,0,0,0.6); transition: all 1s ease; }
.text-meta { color: #fff; text-shadow: 0 4px 20px rgba(0,0,0,0.5); transition: all 0.8s ease; }
#track-title { margin: 0; font-size: clamp(2.5rem, 6vw, 5.5rem); font-weight: 900; line-height: 0.95; text-transform: uppercase; letter-spacing: -2px; }
#track-artist { margin: 8px 0 0 0; font-size: clamp(1.2rem, 3vw, 3rem); font-weight: 300; text-transform: uppercase; opacity: 0.9; }

/* IMMERSIVE TRANSITIONS */
body.immersive #track-img { opacity: 0; transform: scale(0.9) translateY(20px); filter: blur(20px); }
body.immersive .text-meta { opacity: 0; transform: translateY(20px); }

.immersive-content { 
    position: absolute; 
    inset: 0; 
    z-index: 10; 
    display: none; 
    pointer-events: none; 
    opacity: 0; 
    transition: opacity 5s ease-in-out; 
}

.immersive-content.fade-in {
    opacity: 1;
}

/* Marquee Styles (Overlay 1) */
.marquee-group { position: absolute; bottom: 3%; width: 100%; display: flex; flex-direction: column; }
.imm-text { white-space: nowrap; text-transform: uppercase; line-height: 0.8; opacity: 0.8; }
.song-title { font-size: 16vw; font-weight: 200; animation: slideIn 80s linear infinite; }
.artist-name { font-size: 8vw; font-weight: 800; animation: slideIn 60s linear infinite; }
.album-title { font-size: 4vw; font-weight: 500; animation: slideIn 70s linear infinite; }

@keyframes slideIn {
    0% { transform: translateX(100vw); } /* Start partially on screen or just off */
    100% { transform: translateX(-200%); } /* Move much further out */
}

/* Visualization #2 (The Word Block) */
#word-cloud-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.word-block-wrapper {
    display: flex;
    flex-direction: column;
    width: 140%; 
    animation: moveUpwards 40s linear forwards;
    opacity: 0.3; 
}

.cloud-row {
    font-size: clamp(1.5rem, 3.5vw, 3rem);
    font-weight: 900;
    text-transform: uppercase;
    white-space: nowrap;
    line-height: 1.4;
    letter-spacing: 1px;
    margin-bottom: 5px;
    
    /* Fade out starts at 24s. Rows at bottom (higher index) fade first */
    /* Removed blur from this animation */
    animation: fadeOutBottomUp 1.5s ease-in forwards;
    animation-delay: calc(30s - (var(--row-index) * 0.15s));
}

.word-unit {
    display: inline-block;
    opacity: 0;
    animation: fadeInWord 0.8s ease-out forwards;
    animation-delay: var(--word-delay);
}

@keyframes moveUpwards {
    0% { transform: translateY(30vh); }
    100% { transform: translateY(-50vh); }
}

@keyframes fadeInWord {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeOutBottomUp {
    from { opacity: 1; }
    to { opacity: 0; } /* Removed blur(15px) */
}

/* Visualization #3 (Stacked Drift) */
#immersive-overlay-3 {
    display: none;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.stacked-drift-container {
    display: flex;
    flex-direction: column;
    gap: 2vh;
    transform: rotate(-30deg); 
}

/* --- THE PARENT: Constant Slow Transversal Drift --- */
.drift-row {
    width: 100%;
    will-change: transform;
}

/* Row 1 and 3 (moveRTL) enter from the RIGHT, so the row should drift RIGHT to LEFT.
   Row 2 (moveLTR) enters from the LEFT, so the row should drift LEFT to RIGHT.
*/
.row-1, .row-3 { animation: slowDriftRTL 40s linear infinite; }
.row-2 { animation: slowDriftLTR 40s linear infinite; }

@keyframes slowDriftRTL {
    from { transform: translateX(10vw); }
    to { transform: translateX(-10vw); }
}

@keyframes slowDriftLTR {
    from { transform: translateX(-10vw); }
    to { transform: translateX(10vw); }
}

/* --- THE CHILD: The "Enter-Pause-Exit" Logic --- */
.drift-text {
    font-size: 16vw;
    font-weight: 900;
    text-transform: uppercase;
    white-space: nowrap;
    line-height: 0.9;
    letter-spacing: -5px;
    opacity: 0;
    will-change: transform, opacity;
}

.drift-rtl { animation: moveRTL 25s forwards; }
.drift-ltr { animation: moveLTR 25s forwards; }

@keyframes moveRTL {
    0% { transform: translateX(130vw); opacity: 0; animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1); }
    15% { transform: translateX(0); opacity: 1; } 
    85% { transform: translateX(0); opacity: 1; animation-timing-function: cubic-bezier(0.7, 0, 0.84, 0); }
    100% { transform: translateX(-150vw); opacity: 0; }
}

@keyframes moveLTR {
    0% { transform: translateX(-130vw); opacity: 0; animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1); }
    15% { transform: translateX(0); opacity: 1; } 
    85% { transform: translateX(0); opacity: 1; animation-timing-function: cubic-bezier(0.7, 0, 0.84, 0); }
    100% { transform: translateX(150vw); opacity: 0; }
}
/* Visualization #4 (Vertical Stack Rotate) */
#immersive-overlay-4 {
    display: none;
    justify-content: center;
    align-items: center;
    /* Maintain perspective for 3D depth */
    perspective: 1200px; 
}

.vertical-stack-rotate {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    /* Initial rotation to stay vertical */
    transform: rotate(90deg); 
    width: 100vh;
    gap: 0.5vh;
    /* Slowed to 14s and renamed for clarity; uses rotateX to swing 
       horizontally relative to the screen after the 90deg rotation */
    animation: subtle3DSwing 23s cubic-bezier(0.45, 0, 0.55, 1) infinite alternate;
    transform-style: preserve-3d;
}

.stack-line {
    white-space: nowrap;
    text-transform: uppercase;
    opacity: 0; 
    color: rgba(255, 255, 255, 0.6); 
    line-height: 0.9;
    will-change: transform, opacity;
    animation: 
        stackFadeIn 1s ease-out forwards,
        traverse var(--trav-speed) linear infinite alternate;
}

/* Base Styles for Line Variations */
.line-1, .line-4, .line-7 { font-size: 18vw; font-weight: 900; letter-spacing: -8px; }
.line-2, .line-5, .line-8 { font-size: 15vw; font-weight: 200; letter-spacing: 2px; }
.line-3, .line-6, .line-9 { font-size: 16vw; font-weight: 500; letter-spacing: -2px; }

/* Ensure no pseudo-elements interfere */
.stack-line::after { content: none !important; }

/* The swing logic: After rotate(90deg), the local X-axis is what 
   controls the "left-right" swing visually. Reduced to 20deg for subtlety.
*/
@keyframes subtle3DSwing {
    0% { transform: rotate(90deg) rotateX(-10deg); }
    100% { transform: rotate(90deg) rotateX(10deg); }
}

@keyframes traverse {
    0% { transform: translateX(var(--trav-start)); }
    100% { transform: translateX(var(--trav-end)); }
}

@keyframes stackFadeIn {
    to { opacity: 0.6; } 
}
/* Auth Screens */
.glass-container { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); text-align: center; padding: 40px; background: rgba(0,0,0,0.4); backdrop-filter: blur(20px); border: 1px solid rgba(255,255,255,0.1); }
#login-button { background: #fff; color: #000; border: none; padding: 12px 40px; font-weight: 900; cursor: pointer; letter-spacing: 2px; }