:root {
    --color-bg: #070709;
    --color-surface: #111116;
    --color-surface-hover: #1a1a24;
    --color-gold: #D4AF37;
    --color-gold-dim: rgba(212, 175, 55, 0.3);
    --color-burgundy: #4a0e17;
    --color-text: #f0f0f0;
    --color-text-muted: #a0a0a0;
    --font-display: 'Cinzel', serif;
    --font-body: 'Noto Serif KR', serif;
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Entry Overlay */
.entry-overlay {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background-color: var(--color-bg); z-index: 100000;
    display: flex; flex-direction: column; justify-content: center; align-items: center;
    text-align: center; transition: opacity 1s ease, visibility 1s ease;
}
.entry-overlay.hidden { opacity: 0; visibility: hidden; }


/* Noise Overlay */
.noise-overlay {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    pointer-events: none; z-index: 9999; opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Particles */
.particle {
    position: fixed; pointer-events: none;
    background-color: var(--color-gold);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-gold);
    z-index: 9998;
    animation: floatParticle 3s infinite linear;
}
@keyframes floatParticle {
    0% { transform: translateY(0) scale(1); opacity: 0.8; }
    100% { transform: translateY(-50px) scale(0); opacity: 0; }
}

/* Typography & Layouts */
.section-header { text-align: center; margin-bottom: 5rem; }
.section-header h2 { font-family: var(--font-display); font-size: 3rem; letter-spacing: 8px; color: var(--color-gold); margin-bottom: 1rem; }
.section-header p { color: var(--color-text-muted); font-size: 1.1rem; letter-spacing: 2px; }

/* Navigation */
nav {
    position: fixed; top: 0; width: 100%; padding: 2rem 4rem;
    display: flex; justify-content: space-between; align-items: center;
    z-index: 100; mix-blend-mode: difference;
}
.logo { font-family: var(--font-display); font-size: 1.5rem; font-weight: 800; letter-spacing: 4px; color: var(--color-gold); text-decoration: none; }
.nav-links a {
    color: var(--color-text); text-decoration: none; margin-left: 3rem;
    font-size: 0.9rem; letter-spacing: 2px; transition: color var(--transition-smooth);
    text-transform: uppercase; font-family: var(--font-display);
}
.nav-links a:hover { color: var(--color-gold); }

/* Hero Section */
.hero {
    height: 100vh; display: flex; flex-direction: column; justify-content: center;
    align-items: center; position: relative; text-align: center; overflow: hidden;
}
.hero-bg-slider {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    z-index: -2; background-color: var(--color-bg);
}
.hero-slide {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover; background-position: center 15%;
    opacity: 0; transition: opacity 3s cubic-bezier(0.16, 1, 0.3, 1), transform 10s linear;
    transform: scale(1.05); filter: brightness(0.4) sepia(20%) hue-rotate(-10deg);
}
.hero-slide.active { opacity: 1; transform: scale(1); }
.hero::before {
    content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 60vw; height: 60vw; background: radial-gradient(circle, var(--color-burgundy) 0%, transparent 60%);
    opacity: 0.5; z-index: -1; filter: blur(60px); animation: pulseBg 8s infinite alternate;
}
@keyframes pulseBg {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.2; }
    100% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.4; }
}
.hero-title {
    font-family: var(--font-display); font-size: clamp(3rem, 8vw, 7rem);
    font-weight: 800; line-height: 1.1; letter-spacing: 12px; margin-bottom: 1rem;
    text-transform: uppercase; background: linear-gradient(to bottom, #fff, var(--color-gold));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    opacity: 0; transform: translateY(30px); animation: fadeUp 1.2s var(--transition-smooth) forwards 0.2s;
}
.hero-subtitle {
    font-size: 1.2rem; color: var(--color-text-muted); letter-spacing: 4px;
    margin-bottom: 3rem; font-weight: 300; opacity: 0; transform: translateY(20px);
    animation: fadeUp 1s var(--transition-smooth) forwards 0.5s;
}
.cta-btn {
    padding: 1.2rem 3rem; background: transparent; border: 1px solid var(--color-gold);
    color: var(--color-gold); font-family: var(--font-display); font-size: 1rem;
    letter-spacing: 3px; position: relative; overflow: hidden;
    transition: all var(--transition-smooth); opacity: 0;
    animation: fadeUp 1s var(--transition-smooth) forwards 0.8s;
    text-decoration: none; display: inline-block;
}
.cta-btn::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: var(--color-gold); transform: scaleX(0); transform-origin: right;
    transition: transform var(--transition-smooth); z-index: -1;
}
.cta-btn:hover { color: var(--color-bg); }
.cta-btn:hover::before { transform: scaleX(1); transform-origin: left; }

@keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }

/* Scroll Indicator */
.scroll-indicator {
    position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center;
    opacity: 0; animation: fadeUp 1s var(--transition-smooth) forwards 1.2s;
    pointer-events: none; z-index: 10;
}
.scroll-text {
    color: var(--color-gold); font-size: 0.7rem; letter-spacing: 4px;
    margin-bottom: 1rem; font-family: var(--font-display);
    opacity: 0.7; animation: pulseText 2s infinite alternate;
}
.scroll-line {
    width: 1px; height: 50px; background: linear-gradient(to bottom, var(--color-gold), transparent);
    animation: scrollLine 2s cubic-bezier(0.77, 0, 0.175, 1) infinite;
    transform-origin: top;
}

@keyframes pulseText { 0% { opacity: 0.4; } 100% { opacity: 1; } }
@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}
/* Ost Page */
.ost-header { text-align: center; padding: 10rem 2rem 4rem; background: var(--color-bg); }

/* Global Music Player */
.music-player {
    position: fixed; bottom: 0; left: 0; width: 100%; height: 70px;
    background: rgba(10, 10, 15, 0.85); backdrop-filter: blur(15px);
    border-top: 1px solid rgba(212, 175, 55, 0.3);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 3rem; z-index: 99999;
    transform: translateY(100%); transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.music-player.visible { transform: translateY(0); }
.player-info { display: flex; flex-direction: column; width: 300px; }
.player-track-name { font-family: var(--font-body); color: var(--color-gold); font-weight: 700; font-size: 1.1rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.player-status { font-size: 0.8rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 2px; }
.player-controls { display: flex; gap: 2rem; align-items: center; }
.player-btn { background: transparent; border: none; color: #fff; font-size: 1.5rem; transition: all 0.3s; cursor: pointer; }
.player-btn:hover { color: var(--color-gold); transform: scale(1.1); }
.player-volume-wrapper { display: flex; align-items: center; gap: 0.5rem; color: #ccc; }
.player-volume-slider { width: 100px; cursor: pointer; accent-color: var(--color-gold); }

/* Accordion Section */
.showcase-section { padding: 8rem 2rem; background: var(--color-bg); border-top: 1px solid rgba(212, 175, 55, 0.1); }
.accordion-container { display: flex; width: 100%; max-width: 1400px; height: 70vh; margin: 0 auto; gap: 4px; }
.accordion-panel {
    position: relative; flex: 1; height: 100%; background-color: var(--color-surface);
    background-size: cover; background-position: center center; background-repeat: no-repeat;
    transition: flex 0.8s cubic-bezier(0.16, 1, 0.3, 1), filter 0.8s ease;
    overflow: hidden; border: 1px solid rgba(255,255,255,0.05);
    filter: grayscale(80%) brightness(0.6);
}
.accordion-panel:hover, .accordion-panel.active {
    flex: 6; filter: grayscale(0%) brightness(1);
    border: 1px solid var(--color-gold-dim); box-shadow: 0 0 40px rgba(212, 175, 55, 0.1);
}
.panel-rosalyn { background-image: url('https://ktb.btma.workers.dev/AR/A/013.webp'); }
.panel-lillian { background-image: url('https://ktb.btma.workers.dev/AR/B/013.webp'); }
.panel-margareta { background-image: url('https://ktb.btma.workers.dev/AR/C/013.webp'); }
.panel-seria { background-image: url('https://ktb.btma.workers.dev/AR/D/013.webp'); }
.panel-argen { background-image: url('https://ktb.btma.workers.dev/AR/E/013.webp'); }
.panel-eloise { background-image: url('https://ktb.btma.workers.dev/AR/F/013.webp'); }
.panel-kailus { background-image: url('https://ktb.btma.workers.dev/AR/G/013.webp'); }
.panel-killian { background-image: url('https://ktb.btma.workers.dev/AR/H/013.webp'); }
.panel-valerius { background-image: url('https://ktb.btma.workers.dev/AR/I/013.webp'); }
.panel-lancelot { background-image: url('https://ktb.btma.workers.dev/AR/J/013.webp'); }
.panel-freya { background-image: url('https://ktb.btma.workers.dev/AR/K/013.webp'); }
.panel-kael { background-image: url('https://ktb.btma.workers.dev/AR/L/013.webp'); }
.panel-damon { background-image: url('https://ktb.btma.workers.dev/AR/M/013.webp'); }
.panel-chloe { background-image: url('https://ktb.btma.workers.dev/AR/N/013.webp'); }
.panel-orion { background-image: url('https://ktb.btma.workers.dev/AR/Q/013.webp'); }
.panel-zero { background-image: url('https://ktb.btma.workers.dev/AR/R/013.webp'); }
.panel-julian { background-image: url('https://ktb.btma.workers.dev/AR/O/013.webp'); }
.panel-beatrice { background-image: url('https://ktb.btma.workers.dev/AR/P/013.webp'); }

/* Persona Card Custom Style */
.panel-persona {
    background: radial-gradient(circle at center, #2a0810 0%, #000 80%);
    display: flex; flex-direction: column; justify-content: center; align-items: center;
}
.persona-question {
    font-family: var(--font-display); font-size: 4rem; color: rgba(212, 175, 55, 0.4);
    transition: all var(--transition-smooth);
}
.panel-persona:hover .persona-question { color: var(--color-gold); text-shadow: 0 0 20px rgba(212, 175, 55, 0.5); transform: scale(1.1); }
.persona-text {
    font-family: var(--font-body); font-size: 1.1rem; color: #fff; text-align: center;
    margin-top: 1rem; opacity: 0; transform: translateY(20px); transition: all 0.5s ease;
    white-space: nowrap; font-weight: 700;
}
.panel-persona:hover .persona-text { opacity: 1; transform: translateY(0); }

/* World Section */
.world-section { padding: 8rem 2rem; background: var(--color-bg); position: relative; }
.world-content { max-width: 800px; margin: 0 auto; text-align: justify; line-height: 2; font-size: 1.1rem; color: #ccc; }
.world-content p { margin-bottom: 2rem; }
.world-content strong { color: var(--color-gold); }

/* Guide Section */
.guide-section { padding: 8rem 2rem; background: var(--color-surface); text-align: center; }
.guide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; max-width: 1200px; margin: 0 auto; }
.guide-card { padding: 3rem; border: 1px solid rgba(212, 175, 55, 0.2); background: rgba(0,0,0,0.5); backdrop-filter: blur(10px); }
.guide-card h3 { font-family: var(--font-display); color: var(--color-gold); margin-bottom: 1rem; font-size: 1.5rem; }

/* Lore Modal (Glassmorphism) */
.lore-modal {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0,0,0,0.8); backdrop-filter: blur(15px);
    z-index: 2000; display: none; justify-content: center; align-items: center;
    opacity: 0; transition: opacity 0.5s ease;
}
.lore-modal.visible { display: flex; opacity: 1; }
.lore-content {
    background: linear-gradient(135deg, rgba(20,20,25,0.9), rgba(10,10,15,0.9));
    border: 1px solid var(--color-gold); width: 90%; max-width: 800px;
    max-height: 80vh; overflow-y: auto; padding: 4rem; position: relative;
    box-shadow: 0 0 50px rgba(212, 175, 55, 0.1);
}
.close-btn {
    position: absolute; top: 2rem; right: 2rem; color: var(--color-gold);
    font-size: 2rem; font-family: var(--font-display); line-height: 1;
}
.lore-header { text-align: center; margin-bottom: 3rem; }
.lore-header h2 { font-family: var(--font-display); font-size: 2.5rem; color: var(--color-gold); }
.lore-text { font-size: 1.05rem; line-height: 2; color: #ddd; }
.lore-text p { margin-bottom: 1.5rem; }
.lore-play-btn { display: block; width: fit-content; margin: 3rem auto 0; padding: 1rem 3rem; border: 1px solid var(--color-gold); color: var(--color-gold); text-decoration: none; text-transform: uppercase; letter-spacing: 2px; transition: all 0.3s ease; }
.lore-play-btn:hover { background: var(--color-gold); color: #000; }

/* Footer */
footer { padding: 4rem 2rem; text-align: center; border-top: 1px solid rgba(212, 175, 55, 0.2); }
footer .links a { color: var(--color-text-muted); text-decoration: none; margin: 0 1rem; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 1px; }
footer .links a:hover { color: var(--color-gold); }
footer p { margin-top: 2rem; color: #555; font-size: 0.8rem; letter-spacing: 1px; }

/* Decorative Corners */
.corner { position: absolute; width: 40px; height: 40px; border: 2px solid var(--color-gold-dim); pointer-events: none; }
.corner-tl { top: 2rem; left: 2rem; border-right: none; border-bottom: none; }
.corner-tr { top: 2rem; right: 2rem; border-left: none; border-bottom: none; }
.corner-bl { bottom: 2rem; left: 2rem; border-right: none; border-top: none; }
.corner-br { bottom: 2rem; right: 2rem; border-left: none; border-top: none; }

@media (max-width: 768px) {
    .accordion-container { flex-direction: column; height: 120vh; }
    .hero-title { font-size: 3rem; letter-spacing: 6px; }
    .nav-links { display: none; }
    .lore-content { padding: 2rem; }
}