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

:root {
    /* Palette Colors */
    --fog-light: #C8D0D8;
    --fog-mid: #A8B8C8;
    --fog-deep: #8898A8;
    --fog-dark: #687888;
    --clarity-light: #D8E0E8;
    --clarity-mid: #B8C8D4;
    --text-display: #2A3A4A;
    --text-body: #3A4A5A;
    --text-caption: #5A6A7A;
    --bubble-glass: rgba(255, 255, 255, 0.12);
    --bubble-border: rgba(255, 255, 255, 0.15);
    --bubble-glass-hover: rgba(255, 255, 255, 0.18);
    
    /* Fonts */
    --font-display: 'Bebas Neue', sans-serif;
    --font-body: 'Lora', serif;
    --font-mono: 'Azeret Mono', monospace;
    
    /* Blur CSS Variable */
    --blur: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-body);
    overflow-x: hidden;
    background: var(--fog-light);
}

#app {
    position: relative;
    width: 100%;
}

/* ============================================
   LAYER STYLING
   ============================================ */

.layer {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.layer-1 {
    height: 100vh;
    background: linear-gradient(180deg, var(--fog-light) 0%, var(--fog-mid) 30%, var(--fog-deep) 60%, var(--fog-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.layer-2 {
    min-height: 150vh;
    background: linear-gradient(180deg, var(--fog-light) 0%, var(--fog-mid) 50%, var(--fog-deep) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20vh 2rem;
    gap: 15vh;
}

.layer-3 {
    min-height: 120vh;
    background: linear-gradient(180deg, var(--clarity-light) 0%, var(--clarity-mid) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10vh 2rem;
}

.layer-4 {
    min-height: 100vh;
    background: linear-gradient(180deg, var(--clarity-mid) 0%, var(--fog-mid) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10vh 2rem;
}

.layer-5 {
    min-height: 60vh;
    background: linear-gradient(180deg, var(--fog-deep) 0%, var(--fog-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5vh 2rem;
}

/* ============================================
   GRADIENT MESH & ATMOSPHERIC LAYERS
   ============================================ */

.gradient-mesh {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#mesh-plane-1 {
    z-index: 0;
    opacity: 1;
}

#mesh-plane-2 {
    z-index: 1;
    opacity: 0;
    animation: meshBloomIn 0.4s ease-in-out 1.5s forwards;
    background: 
        radial-gradient(ellipse 40vw 40vh at 20% 30%, rgba(200, 210, 220, 0.3), transparent),
        radial-gradient(ellipse 35vw 35vh at 70% 60%, rgba(200, 210, 220, 0.25), transparent);
}

#mesh-plane-3 {
    z-index: 2;
    opacity: 0;
    animation: meshBloomIn 0.4s ease-in-out 1.8s forwards;
    background: 
        radial-gradient(ellipse 30vw 30vh at 80% 20%, rgba(210, 220, 230, 0.2), transparent);
}

@keyframes meshBloomIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 0.3;
        transform: scale(1);
    }
}

/* ============================================
   FLOWING CURVES
   ============================================ */

.flowing-curves-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 3;
}

.layer-1 .flowing-curves-wrapper {
    z-index: 4;
}

/* ============================================
   HERO SECTION (Layer 1)
   ============================================ */

.hero-container {
    position: relative;
    z-index: 5;
    text-align: center;
    width: 100%;
}

.hero-text {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 9vw, 8rem);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-display);
    opacity: 0.3;
    filter: blur(12px);
    animation: heroEmerge 1s ease-out 0.5s forwards;
    white-space: nowrap;
}

@keyframes heroEmerge {
    from {
        opacity: 0.3;
        filter: blur(12px);
    }
    to {
        opacity: 1;
        filter: blur(0);
    }
}

.scroll-chevron {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    opacity: 0;
    animation: chevronAppear 0.4s ease-out 1.5s forwards;
}

.scroll-chevron::before {
    content: '';
    display: block;
    width: 100%;
    height: 100%;
    border-left: 2px solid var(--text-caption);
    border-bottom: 2px solid var(--text-caption);
    transform: rotate(-45deg);
    opacity: 0.5;
    animation: chevronPulse 2s ease-in-out infinite;
}

@keyframes chevronAppear {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes chevronPulse {
    0%, 100% {
        transform: rotate(-45deg) translateY(0);
    }
    50% {
        transform: rotate(-45deg) translateY(8px);
    }
}

/* ============================================
   FROSTED CARDS (Layer 2)
   ============================================ */

.card {
    width: 55vw;
    max-width: 600px;
    padding: 3rem;
    border-radius: 24px;
    backdrop-filter: blur(20px);
    background: rgba(200, 210, 220, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.1);
    filter: var(--blur, 6px);
    transition: all 0.3s ease;
    z-index: 6;
}

.card:hover {
    backdrop-filter: blur(32px);
    background: rgba(200, 210, 220, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.card-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-display);
    margin-bottom: 1.5rem;
}

.card-text {
    font-size: clamp(0.95rem, 1.15vw, 1.1rem);
    line-height: 1.75;
    color: var(--text-body);
}

/* ============================================
   CLARITY PANEL (Layer 3)
   ============================================ */

.clarity-panel {
    width: 80vw;
    max-width: 800px;
    padding: 4rem;
    z-index: 6;
    text-align: center;
}

.clarity-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-display);
    margin-bottom: 2rem;
}

.clarity-text {
    font-size: clamp(0.95rem, 1.15vw, 1.1rem);
    line-height: 1.75;
    color: var(--text-body);
    margin-bottom: 1.5rem;
}

.clarity-text:last-child {
    margin-bottom: 0;
}

/* ============================================
   BUBBLES (Layer 4)
   ============================================ */

.artifacts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(20vw, 1fr));
    gap: 4vw;
    width: 90vw;
    max-width: 1200px;
    z-index: 6;
    align-items: center;
    justify-items: center;
}

.bubble {
    width: 20vw;
    height: 30vh;
    min-width: 200px;
    min-height: 250px;
    max-width: 300px;
    max-height: 400px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.04) 100%);
    border: 1px solid var(--bubble-border);
    box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.2), 0 8px 32px rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    animation: bubbleBob 4s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}

.bubble[data-bubble="1"] {
    animation-delay: 1s;
}

.bubble[data-bubble="2"] {
    animation-delay: 2s;
}

.bubble[data-bubble="3"] {
    animation-delay: 3s;
}

@keyframes bubbleBob {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(10px);
    }
}

.bubble:hover {
    background: linear-gradient(135deg, var(--bubble-glass-hover) 0%, rgba(255, 255, 255, 0.06) 100%);
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 
        inset 0 1px 2px rgba(255, 255, 255, 0.3),
        0 8px 32px rgba(0, 0, 0, 0.1),
        inset 0 0 40px rgba(255, 200, 100, 0.03);
    animation-play-state: paused;
}

.bubble:hover::after {
    opacity: 0.03;
}

.bubble::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: conic-gradient(
        from 0deg,
        rgba(255, 100, 150, 0.1),
        rgba(100, 150, 255, 0.1),
        rgba(100, 255, 150, 0.1),
        rgba(255, 100, 150, 0.1)
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    border-radius: 50%;
}

.bubble-content {
    text-align: center;
    z-index: 2;
    pointer-events: auto;
}

.bubble-label {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-display);
    margin-bottom: 0.5rem;
}

.bubble-meta {
    font-family: var(--font-mono);
    font-size: clamp(0.7rem, 0.85vw, 0.85rem);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--text-caption);
}

/* ============================================
   FOOTER (Layer 5)
   ============================================ */

.footer-content {
    text-align: center;
    z-index: 6;
    filter: blur(0);
    animation: footerFadeIn 0.6s ease-out 0.5s forwards;
    opacity: 0;
}

@keyframes footerFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.footer-text {
    font-size: clamp(0.95rem, 1.15vw, 1.1rem);
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1rem;
}

.footer-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

.footer-link:hover {
    color: white;
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
}

.footer-meta {
    font-family: var(--font-mono);
    font-size: clamp(0.7rem, 0.85vw, 0.85rem);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--text-caption);
    margin-top: 2rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .card {
        width: 90vw;
        padding: 2rem;
    }
    
    .clarity-panel {
        width: 90vw;
        padding: 2rem;
    }
    
    .artifacts-grid {
        width: 95vw;
        grid-template-columns: repeat(2, 1fr);
        gap: 2vw;
    }
    
    .bubble {
        width: 35vw;
        height: 25vh;
    }
    
    .layer-2 {
        padding: 10vh 1rem;
        gap: 10vh;
    }
}

@media (max-width: 480px) {
    .artifacts-grid {
        grid-template-columns: 1fr;
    }
    
    .bubble {
        width: 70vw;
        height: 30vh;
    }
}

/* ============================================
   SCROLLING & INTERSECTION OBSERVER
   ============================================ */

.layer-1 {
    z-index: 100;
}

.layer-2 {
    z-index: 90;
}

.layer-3 {
    z-index: 80;
}

.layer-4 {
    z-index: 70;
}

.layer-5 {
    z-index: 60;
}

/* Utility for IntersectionObserver-driven animations */
.in-view {
    --blur: 0 !important;
}