/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background: linear-gradient(180deg, #0a0014 0%, #1a0033 30%, #0a0014 70%, #1a0033 100%);
    color: #e8e0f0;
    margin: 0;
    overflow-x: hidden;
    font-family: 'Newsreader', serif;
    font-weight: 300;
    line-height: 1.75;
    min-height: 500vh;
}

/* === HUD Overlay === */
.hud {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 100;
}

.hud-corner {
    position: absolute;
    width: 20px;
    height: 20px;
}

.hud-corner-tl {
    top: 20px;
    left: 20px;
    border-top: 1px solid #00f0ff;
    border-left: 1px solid #00f0ff;
    opacity: 0.2;
}

.hud-corner-tr {
    top: 20px;
    right: 20px;
    border-top: 1px solid #00f0ff;
    border-right: 1px solid #00f0ff;
    opacity: 0.2;
}

.hud-corner-bl {
    bottom: 20px;
    left: 20px;
    border-bottom: 1px solid #00f0ff;
    border-left: 1px solid #00f0ff;
    opacity: 0.2;
}

.hud-corner-br {
    bottom: 20px;
    right: 20px;
    border-bottom: 1px solid #00f0ff;
    border-right: 1px solid #00f0ff;
    opacity: 0.2;
}

.hud-crosshair-h,
.hud-crosshair-v {
    position: absolute;
    background: #00f0ff;
    opacity: 0.15;
}

.hud-crosshair-h {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 1px;
}

.hud-crosshair-v {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1px;
    height: 40px;
}

.hud-label {
    position: absolute;
    font-family: 'Chakra Petch', sans-serif;
    font-size: clamp(0.65rem, 1vw, 0.85rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-weight: 400;
    color: #00f0ff;
    opacity: 0.25;
}

.hud-label-1 {
    top: 5vh;
    left: 3vw;
}

.hud-label-2 {
    top: 5vh;
    right: 3vw;
}

.hud-label-3 {
    bottom: 5vh;
    left: 3vw;
}

.hud-label-4 {
    bottom: 5vh;
    right: 3vw;
}

/* HUD Arcs */
.hud-arc {
    position: absolute;
    border: 1px solid #00f0ff;
    border-radius: 50%;
    opacity: 0.08;
}

.hud-arc-1 {
    width: 300px;
    height: 300px;
    top: -100px;
    right: -100px;
    clip-path: polygon(0 50%, 50% 50%, 50% 100%, 0 100%);
}

.hud-arc-2 {
    width: 200px;
    height: 200px;
    bottom: -50px;
    left: -50px;
    clip-path: polygon(50% 0, 100% 0, 100% 50%, 50% 50%);
}

/* HUD Pings */
.hud-ping {
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #39ff14;
    animation: bioluminPulse 2.5s ease-in-out infinite;
}

.hud-ping-1 {
    top: 8vh;
    left: 25vw;
    animation-delay: 0s;
}

.hud-ping-2 {
    top: 50vh;
    right: 5vw;
    animation-delay: 0.8s;
}

.hud-ping-3 {
    bottom: 12vh;
    left: 15vw;
    animation-delay: 1.6s;
}

@keyframes bioluminPulse {
    0%, 100% {
        opacity: 0.3;
        box-shadow: 0 0 4px #39ff14;
    }
    50% {
        opacity: 1;
        box-shadow: 0 0 12px #39ff14;
    }
}

/* === Spiral Path SVG === */
.spiral-path {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 500vh;
    z-index: 1;
    pointer-events: none;
}

.spiral-line {
    stroke-dasharray: 15000;
    stroke-dashoffset: 15000;
    transition: stroke-dashoffset 0.05s linear;
}

/* === Lens Flare === */
.lens-flare {
    position: absolute;
    top: 50vh;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    pointer-events: none;
    will-change: transform;
}

.flare-bloom {
    position: absolute;
    width: 60vw;
    height: 60vw;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(255,215,0,0.08) 0%, transparent 70%);
    border-radius: 50%;
    mix-blend-mode: screen;
}

.flare-ring {
    position: absolute;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    mix-blend-mode: screen;
}

.flare-ring-1 {
    width: 15vw;
    height: 15vw;
    border: 1px solid #ff2d95;
    opacity: 0.2;
}

.flare-ring-2 {
    width: 10vw;
    height: 10vw;
    border: 1px solid #00f0ff;
    opacity: 0.15;
    margin-top: -5vw;
    margin-left: 3vw;
}

.flare-ring-3 {
    width: 8vw;
    height: 8vw;
    border: 1px solid #ffd700;
    opacity: 0.2;
    margin-top: 4vw;
    margin-left: -4vw;
}

.flare-dot {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #ffd700;
    opacity: 0.4;
}

.flare-dot-1 { top: -30px; left: 40px; }
.flare-dot-2 { top: 50px; left: -60px; }
.flare-dot-3 { top: -10px; left: -90px; }
.flare-dot-4 { top: 80px; left: 70px; }
.flare-dot-5 { top: -60px; left: -20px; }

/* === Zone 1: The Aperture === */
.aperture {
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 10;
}

.hero-title {
    font-family: 'Righteous', cursive;
    font-size: clamp(10rem, 25vw, 40rem);
    font-weight: 400;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: #e8e0f0;
    line-height: 1;
    margin-right: -0.4em;
}

.letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    will-change: transform, opacity;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hangul {
    font-family: 'Newsreader', serif;
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-style: italic;
    opacity: 0.6;
    color: #ff2d95;
    margin-top: 1rem;
}

/* === Zone 2: Chambers === */
.chamber {
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 10;
    padding: 4rem 0;
}

.chamber-odd .panel {
    margin-left: 12vw;
    margin-right: auto;
}

.chamber-even .panel {
    margin-right: 12vw;
    margin-left: auto;
}

.panel {
    max-width: 480px;
    padding: clamp(2rem, 4vw, 4rem);
    border-radius: 24px;
    background: rgba(26, 0, 51, 0.6);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid transparent;
    background-image: linear-gradient(rgba(26, 0, 51, 0.6), rgba(26, 0, 51, 0.6)), linear-gradient(135deg, #ff2d95, #00f0ff);
    background-origin: border-box;
    background-clip: padding-box, border-box;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                box-shadow 0.4s ease;
    will-change: transform, opacity;
}

.panel.visible {
    opacity: 1;
    transform: translateY(0);
}

.panel:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(255,45,149,0.15), 0 8px 25px rgba(0,240,255,0.1);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.4s ease;
}

.panel.visible:hover {
    transform: translateY(-8px);
}

.chamber-id {
    font-family: 'Chakra Petch', sans-serif;
    font-size: clamp(0.65rem, 1vw, 0.85rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-weight: 600;
    color: #00f0ff;
    display: block;
    margin-bottom: 1rem;
}

.panel-title {
    font-family: 'Righteous', cursive;
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 400;
    color: #e8e0f0;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.panel-text {
    font-family: 'Newsreader', serif;
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    font-weight: 300;
    line-height: 1.75;
    color: #e8e0f0;
    opacity: 0.85;
}

/* === Zone 3: The Echo === */
.echo {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 10;
}

.echo-title {
    font-family: 'Righteous', cursive;
    font-size: clamp(10rem, 25vw, 40rem);
    font-weight: 400;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: #e8e0f0;
    line-height: 1;
    margin-right: -0.4em;
}

.echo-letter {
    display: inline-block;
    animation: shellSpin 60s linear infinite;
    will-change: transform;
}

@keyframes shellSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.echo-text {
    font-family: 'Newsreader', serif;
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-style: italic;
    color: #9d4edd;
    opacity: 0.5;
    margin-top: 2rem;
    text-align: center;
    max-width: 600px;
    padding: 0 2rem;
}

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
    .letter,
    .echo-letter {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .panel {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .hud-ping {
        animation: none;
        opacity: 0.6;
    }
}