/* lungless.dev — surreal dreamscape, deep-dive descent */

:root {
    --surface-mist: #e8edf2;
    --abyssal-violet: #1a1528;
    --medusa-purple: #6b5b8a;
    --gill-silver: #c4d4e0;
    --nudibranch-pink: #e0c8d8;
    --deep-current: #2a3040;
    --bioluminescent-green: #3a6b5a;
    --tentacle-lavender: #8a7ba0;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Questrial', sans-serif;
    font-weight: 400;
    line-height: 1.8;
    font-size: 1rem;
    color: var(--deep-current);
    min-height: 100vh;
    background: linear-gradient(
        to bottom,
        #e8edf2 0%,
        #c4d4e0 18%,
        #8a7ba0 40%,
        #6b5b8a 62%,
        #2a3040 82%,
        #1a1528 100%
    );
    background-attachment: fixed;
    overflow-x: hidden;
    position: relative;
}

/* --- Particle field (bioluminescent plankton) --- */

.particle-field {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: var(--bioluminescent-green);
    box-shadow: 0 0 8px 1px rgba(58, 107, 90, 0.35);
    opacity: 0.3;
    animation-name: drift-up;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    will-change: transform, opacity;
}

@keyframes drift-up {
    0% {
        transform: translate3d(0, 100vh, 0) translateX(0);
        opacity: 0;
    }
    8% {
        opacity: var(--p-opacity, 0.35);
    }
    50% {
        transform: translate3d(var(--p-sway, 20px), 50vh, 0);
    }
    92% {
        opacity: var(--p-opacity, 0.35);
    }
    100% {
        transform: translate3d(0, -20px, 0) translateX(0);
        opacity: 0;
    }
}

/* --- Layout: the abyss column --- */

.abyss {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 100%;
    padding-bottom: 8rem;
}

/* --- Hero / surface --- */

.surface {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 5vw 4rem 8vw;
    position: relative;
}

.hero-inner {
    max-width: 720px;
    margin-left: 6%;
}

.scientific-label {
    font-family: 'Cutive Mono', monospace;
    font-size: 0.85rem;
    color: var(--medusa-purple);
    letter-spacing: 0.18em;
    text-transform: lowercase;
    margin-bottom: 2.4rem;
    opacity: 0.85;
}

.domain-title {
    font-family: 'Italiana', serif;
    font-weight: 400;
    font-size: clamp(3rem, 9vw, 7rem);
    line-height: 1.05;
    color: var(--deep-current);
    letter-spacing: 0.01em;
    margin-bottom: 1.4rem;
}

.domain-title .dot {
    color: var(--medusa-purple);
    font-style: italic;
    display: inline-block;
    transform: translateY(-0.05em);
}

.hero-subtitle {
    font-family: 'Italiana', serif;
    font-size: clamp(1.15rem, 2vw, 1.55rem);
    line-height: 1.5;
    color: var(--medusa-purple);
    max-width: 560px;
    margin-bottom: 3rem;
    font-style: italic;
}

.hero-meta {
    font-family: 'Cutive Mono', monospace;
    font-size: 0.8rem;
    color: var(--tentacle-lavender);
    letter-spacing: 0.25em;
    text-transform: lowercase;
    margin-bottom: 1.5rem;
}

.descent-arrow {
    margin-left: 0.4rem;
    animation: bob 4s ease-in-out infinite;
}

@keyframes bob {
    0%, 100% { transform: translateY(0); opacity: 0.7; }
    50% { transform: translateY(8px); opacity: 1; }
}

/* --- Tentacle dividers --- */

.tentacle-divider {
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 1rem 0;
    opacity: 0.85;
}

.tentacle-divider.drift-left {
    justify-content: flex-start;
    padding-left: 18%;
}

.tentacle-divider.drift-right {
    justify-content: flex-end;
    padding-right: 22%;
}

.tentacle-divider svg {
    animation: tentacle-sway 7s ease-in-out infinite;
    transform-origin: top center;
}

.tentacle-divider.drift-right svg {
    animation-duration: 9s;
    animation-delay: -2s;
}

.tentacle-divider.drift-left svg {
    animation-duration: 8s;
    animation-delay: -3.5s;
}

@keyframes tentacle-sway {
    0%, 100% { transform: rotate(-3deg); }
    50% { transform: rotate(3deg); }
}

/* --- Organic content blocks --- */

.organic-block {
    position: relative;
    padding: 3.2rem 3rem;
    margin-block: 2.2rem;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    box-shadow: 0 8px 32px rgba(107, 91, 138, 0.15);
    border: 1px solid rgba(138, 123, 160, 0.25);
    transition: transform 0.6s ease, box-shadow 0.6s ease;
}

.organic-block h2 {
    font-family: 'Italiana', serif;
    font-weight: 400;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1.1;
    margin-bottom: 1.6rem;
    letter-spacing: 0.005em;
}

.organic-block p {
    margin-bottom: 1.1rem;
    max-width: 56ch;
}

.organic-block p:last-child {
    margin-bottom: 0;
}

.organic-block .taxon {
    font-family: 'Cutive Mono', monospace;
    font-size: 0.78rem;
    letter-spacing: 0.15em;
    text-transform: lowercase;
    margin-bottom: 1.6rem;
    opacity: 0.75;
}

.organic-block em {
    font-family: 'Italiana', serif;
    font-style: italic;
    color: var(--medusa-purple);
    font-size: 1.08em;
}

.organic-block .annotation {
    font-family: 'Cutive Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    margin-top: 1.6rem;
    padding-top: 1.2rem;
    border-top: 1px dashed rgba(138, 123, 160, 0.4);
    opacity: 0.85;
}

.organic-block .latin {
    font-family: 'Italiana', serif;
    font-style: italic;
    letter-spacing: 0.02em;
    color: var(--medusa-purple);
}

.organic-block:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 40px rgba(107, 91, 138, 0.22), 0 0 0 1px rgba(58, 107, 90, 0.18);
}

/* zones — text colour transitions with depth */

.zone-light {
    color: var(--deep-current);
}

.zone-light .organic-block,
.organic-block.zone-light {
    background: rgba(26, 21, 40, 0.04);
    color: var(--deep-current);
}

.zone-light .organic-block .taxon,
.organic-block.zone-light .taxon {
    color: var(--medusa-purple);
}

.zone-mid {
    color: #d8d3e4;
}

.organic-block.zone-mid {
    background: rgba(255, 255, 255, 0.06);
    color: #e2dceb;
    border-color: rgba(224, 200, 216, 0.22);
}

.organic-block.zone-mid h2 {
    color: var(--surface-mist);
}

.organic-block.zone-mid em {
    color: var(--nudibranch-pink);
}

.organic-block.zone-mid .latin,
.organic-block.zone-mid .taxon {
    color: var(--nudibranch-pink);
}

.zone-deep {
    color: var(--gill-silver);
}

.organic-block.zone-deep {
    background: rgba(255, 255, 255, 0.06);
    color: var(--gill-silver);
    border-color: rgba(224, 200, 216, 0.18);
}

.organic-block.zone-deep h2 {
    color: var(--surface-mist);
}

.organic-block.zone-deep em {
    color: var(--nudibranch-pink);
}

.organic-block.zone-deep .latin {
    color: var(--nudibranch-pink);
}

.organic-block.zone-deep .taxon {
    color: var(--bioluminescent-green);
    text-shadow: 0 0 12px rgba(58, 107, 90, 0.6);
}

.organic-block.zone-deep .annotation {
    color: var(--gill-silver);
    border-top-color: rgba(224, 200, 216, 0.25);
}

/* --- Per-block organic shapes & positions --- */

.block-1 {
    max-width: 500px;
    margin-left: 12%;
    border-radius: 40% 60% 55% 45% / 55% 45% 60% 40%;
}

.block-2 {
    max-width: 640px;
    margin-left: 22%;
    border-radius: 65% 35% 42% 58% / 38% 62% 55% 45%;
}

.block-3 {
    max-width: 420px;
    margin-left: 6%;
    border-radius: 52% 48% 38% 62% / 64% 36% 58% 42%;
}

.block-4 {
    max-width: 640px;
    margin-left: 18%;
    border-radius: 48% 52% 60% 40% / 42% 58% 50% 50%;
}

.block-5 {
    max-width: 500px;
    margin-left: 9%;
    border-radius: 58% 42% 48% 52% / 50% 60% 40% 50%;
}

.block-6 {
    max-width: 540px;
    margin-left: 25%;
    border-radius: 44% 56% 52% 48% / 60% 40% 56% 44%;
}

/* --- Organism list --- */

.organism-list {
    list-style: none;
    margin: 0.8rem 0 0;
    padding: 0;
}

.organism-list li {
    font-family: 'Questrial', sans-serif;
    padding: 0.6rem 0;
    border-bottom: 1px dotted rgba(138, 123, 160, 0.3);
    line-height: 1.6;
    transition: padding-left 0.4s ease, color 0.4s ease;
    cursor: default;
}

.organism-list li:last-child {
    border-bottom: none;
}

.organism-list li:hover {
    padding-left: 1rem;
    color: var(--bioluminescent-green);
}

.organism-list .latin {
    font-family: 'Italiana', serif;
    font-style: italic;
    font-size: 1.15em;
    color: var(--nudibranch-pink);
    margin-right: 0.6rem;
}

/* --- Inline mono --- */

.mono-inline {
    font-family: 'Cutive Mono', monospace;
    font-size: 0.95em;
    color: var(--bioluminescent-green);
    letter-spacing: 0.04em;
}

/* --- Footer / abyssal floor --- */

.abyssal-floor {
    margin: 6rem auto 0;
    padding: 4rem 5vw 2rem;
    max-width: 720px;
    text-align: center;
    border-top: 1px solid rgba(138, 123, 160, 0.18);
}

.footer-line {
    font-family: 'Italiana', serif;
    font-size: 1.1rem;
    color: var(--gill-silver);
    margin-bottom: 0.7rem;
    letter-spacing: 0.02em;
}

.footer-line.dim {
    font-family: 'Cutive Mono', monospace;
    font-size: 0.8rem;
    color: var(--tentacle-lavender);
    opacity: 0.7;
    letter-spacing: 0.12em;
    text-transform: lowercase;
}

#depthReadout {
    color: var(--bioluminescent-green);
    text-shadow: 0 0 10px rgba(58, 107, 90, 0.5);
}

/* --- Reveal-on-scroll baseline state --- */

.organic-block,
.tentacle-divider {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1.2s ease, transform 1.2s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.organic-block.is-visible,
.tentacle-divider.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* hero remains visible */
.surface {
    opacity: 1;
}

/* --- Responsive --- */

@media (max-width: 720px) {
    .hero-inner {
        margin-left: 0;
    }

    .organic-block {
        padding: 2.2rem 1.6rem;
        margin-left: 4% !important;
        margin-right: 4%;
        max-width: 92%;
    }

    .tentacle-divider.drift-left {
        padding-left: 8%;
    }

    .tentacle-divider.drift-right {
        padding-right: 8%;
    }

    .domain-title {
        font-size: clamp(2.6rem, 14vw, 5rem);
    }
}