/* ==========================================================================
   desca.works — v1
   Y2K futurism · minimal-navigation · art-deco-display · dark-neon
   Compliance phrases: labels above paragraphs (Google Interactive Details:** Details:
   IntersectionObserver trigger animations re-triggering scroll-back
   ========================================================================== */

/* -------------------------------------------------------------------------- */
/* 1. Reset + tokens                                                           */
/* -------------------------------------------------------------------------- */

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

:root {
    /* Palette — exact hex from DESIGN.md */
    --c-void:        #06080f;  /* deep void */
    --c-surface:     #0d1117;  /* elevated surface */
    --c-cyan:        #4aeadc;  /* primary neon */
    --c-magenta:     #ff2d78;  /* secondary neon */
    --c-violet:      #8b5cf6;  /* tertiary glow */
    --c-text:        #e2e8f0;  /* primary text */
    --c-muted:       #64748b;  /* muted text */
    --c-amber:       #f59e0b;  /* accent edge */

    /* Typography */
    --f-display: "Poiret One", "Work Sans", system-ui, sans-serif;
    --f-heading: "Josefin Sans", "Inter", system-ui, sans-serif;
    --f-body:    "Work Sans", "Inter", system-ui, sans-serif;
    --f-mono:    "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;

    /* Layout */
    --gutter: 8vw;
    --channel: 84vw;
    --narrow: 60ch;

    /* Motion */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

html {
    background: var(--c-void);
    scroll-behavior: smooth;
}

body {
    background: var(--c-void);
    color: var(--c-text);
    font-family: var(--f-body);
    font-weight: 300;
    font-size: clamp(1rem, 1.8vw, 1.2rem);
    line-height: 1.75;
    letter-spacing: 0.01em;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* -------------------------------------------------------------------------- */
/* 2. Floating logotype glyph (top-left, persistent)                           */
/* -------------------------------------------------------------------------- */

.logo-glyph {
    position: fixed;
    top: 2.6vh;
    left: var(--gutter);
    z-index: 20;
    font-family: var(--f-display);
    font-size: 1.25rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--c-cyan);
    text-decoration: none;
    text-shadow: 0 0 0px rgba(74, 234, 220, 0);
    transition: text-shadow 600ms var(--ease-out), color 300ms var(--ease-out);
    --glow: 0px;
}

.logo-glyph::before {
    content: "◎";
    display: inline-block;
    margin-right: 0.55em;
    color: var(--c-cyan);
    font-size: 0.9em;
    transform: translateY(-0.05em);
    opacity: 0.85;
}

.logo-glyph {
    text-shadow: 0 0 var(--glow) rgba(74, 234, 220, 0.55);
}

.logo-glyph:hover {
    color: var(--c-amber);
}

/* -------------------------------------------------------------------------- */
/* 3. Atmosphere (blobs, dots, rings, scanline)                                */
/* -------------------------------------------------------------------------- */

.atmosphere {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

/* Dot-grid constellation */
.dot-grid {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 1px 1px, rgba(226, 232, 240, 0.08) 1px, transparent 1.5px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, rgba(0,0,0,1) 40%, rgba(0,0,0,0.5) 80%, rgba(0,0,0,0.15) 100%);
}

/* Organic blobs */
.blob {
    position: absolute;
    width: 70vmin;
    height: 70vmin;
    filter: blur(14px);
    opacity: 0.9;
    mix-blend-mode: screen;
}

.blob-1 {
    top: -10vmin;
    left: -15vmin;
    animation: drift-1 38s ease-in-out infinite;
}

.blob-2 {
    top: 30vh;
    right: -20vmin;
    width: 80vmin;
    height: 80vmin;
    animation: drift-2 44s ease-in-out infinite;
}

.blob-3 {
    bottom: -15vmin;
    left: 20vw;
    width: 90vmin;
    height: 90vmin;
    animation: drift-3 52s ease-in-out infinite;
}

@keyframes drift-1 {
    0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg); }
    50%      { transform: translate3d(6vw, 4vh, 0) rotate(12deg); }
}

@keyframes drift-2 {
    0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg); }
    50%      { transform: translate3d(-5vw, -6vh, 0) rotate(-10deg); }
}

@keyframes drift-3 {
    0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg); }
    50%      { transform: translate3d(4vw, -3vh, 0) rotate(8deg); }
}

/* Orbital rings */
.orbit {
    position: absolute;
    border: 1px solid rgba(74, 234, 220, 0.15);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform-origin: center;
    pointer-events: none;
}

.orbit-sm {
    width: 400px;
    height: 400px;
    margin: -200px 0 0 -200px;
    animation: orbit-rot 60s linear infinite;
    border-color: rgba(74, 234, 220, 0.18);
    top: 30%;
    left: 70%;
}

.orbit-md {
    width: 900px;
    height: 900px;
    margin: -450px 0 0 -450px;
    animation: orbit-rot 90s linear infinite reverse;
    border-color: rgba(74, 234, 220, 0.10);
    top: 60%;
    left: 30%;
}

.orbit-lg {
    width: 1400px;
    height: 1400px;
    margin: -700px 0 0 -700px;
    animation: orbit-rot 120s linear infinite;
    border-color: rgba(139, 92, 246, 0.08);
    top: 50%;
    left: 50%;
}

.orbit::after {
    content: "";
    position: absolute;
    top: -3px;
    left: 50%;
    width: 6px;
    height: 6px;
    margin-left: -3px;
    border-radius: 50%;
    background: var(--c-cyan);
    box-shadow: 0 0 12px var(--c-cyan);
    opacity: 0.55;
}

.orbit-md::after {
    background: var(--c-violet);
    box-shadow: 0 0 12px var(--c-violet);
}

.orbit-lg::after {
    background: var(--c-magenta);
    box-shadow: 0 0 12px var(--c-magenta);
    opacity: 0.35;
}

@keyframes orbit-rot {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

/* Scan-line pulse */
.scanline {
    position: absolute;
    left: 0;
    right: 0;
    top: -4px;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(255, 45, 120, 0) 10%,
        rgba(255, 45, 120, 0.3) 50%,
        rgba(255, 45, 120, 0) 90%,
        transparent 100%);
    box-shadow: 0 0 40px 4px rgba(255, 45, 120, 0.25);
    opacity: 0;
    animation: scan 11s ease-in-out infinite;
    animation-delay: 4s;
}

@keyframes scan {
    0%   { top: -4px;  opacity: 0; }
    5%   { opacity: 0.8; }
    20%  { top: 100vh; opacity: 0; }
    100% { top: 100vh; opacity: 0; }
}

/* -------------------------------------------------------------------------- */
/* 4. Stage + sections                                                         */
/* -------------------------------------------------------------------------- */

.stage {
    position: relative;
    z-index: 1;
    padding: 0;
}

.zone {
    position: relative;
    padding-left: var(--gutter);
    padding-right: var(--gutter);
}

.zone-narrow {
    max-width: calc(var(--narrow) + var(--gutter) * 2);
    margin: 0 auto;
    padding-top: 4vh;
    padding-bottom: 4vh;
}

.zone-wide {
    padding-left: 0;
    padding-right: 0;
    width: 100%;
    position: relative;
}

.zone-wide .panel {
    padding: 10vh var(--gutter);
    max-width: 90ch;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.edge-glow {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(90deg,
            rgba(74, 234, 220, 0.06) 0%,
            rgba(74, 234, 220, 0) 20%,
            rgba(74, 234, 220, 0) 80%,
            rgba(74, 234, 220, 0.06) 100%),
        linear-gradient(180deg,
            rgba(139, 92, 246, 0) 0%,
            rgba(139, 92, 246, 0.03) 50%,
            rgba(139, 92, 246, 0) 100%);
    z-index: 0;
}

/* Breath gaps (ambient dark pulses) */
.breath {
    position: relative;
    height: 30vh;
    width: 100%;
    overflow: hidden;
}

.breath::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 80vmin;
    height: 80vmin;
    margin-left: -40vmin;
    margin-top: -40vmin;
    border-radius: 50%;
    background: radial-gradient(circle,
        rgba(74, 234, 220, 0.045) 0%,
        rgba(74, 234, 220, 0.015) 40%,
        rgba(74, 234, 220, 0) 70%);
    animation: breath-pulse 8s ease-in-out infinite;
    pointer-events: none;
}

.breath.short {
    height: 12vh;
}

@keyframes breath-pulse {
    0%, 100% { transform: scale(0.9); opacity: 0.5; }
    50%      { transform: scale(1.15); opacity: 1; }
}

/* -------------------------------------------------------------------------- */
/* 5. Hero                                                                     */
/* -------------------------------------------------------------------------- */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0 var(--gutter);
    text-align: center;
    overflow: hidden;
}

.hero-halo {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 90vmin;
    height: 90vmin;
    margin-left: -45vmin;
    margin-top: -45vmin;
    border-radius: 50%;
    background: radial-gradient(circle,
        rgba(74, 234, 220, 0.08) 0%,
        rgba(74, 234, 220, 0.03) 35%,
        rgba(74, 234, 220, 0) 70%);
    pointer-events: none;
    animation: halo-pulse 6s ease-in-out infinite;
}

@keyframes halo-pulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50%      { transform: scale(1.08); opacity: 1; }
}

.hero-orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 80vmin;
    height: 80vmin;
    margin-left: -40vmin;
    margin-top: -40vmin;
    animation: hero-rot 70s linear infinite;
    pointer-events: none;
}

.hero-orbit::before {
    content: "";
}

@keyframes hero-rot {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.hero-title {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: clamp(4rem, 12vw, 10rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--c-cyan);
    line-height: 1;
    text-shadow:
        0 0 14px rgba(74, 234, 220, 0.35),
        0 0 42px rgba(74, 234, 220, 0.12);
    position: relative;
    z-index: 2;
    margin: 0;
}

.hero-title span {
    display: inline-block;
    opacity: 0;
    transform: translateY(24px);
    animation: letter-in 900ms var(--ease-out) forwards;
}

.hero-title span:nth-child(1) { animation-delay: 120ms; }
.hero-title span:nth-child(2) { animation-delay: 220ms; }
.hero-title span:nth-child(3) { animation-delay: 320ms; }
.hero-title span:nth-child(4) { animation-delay: 420ms; }
.hero-title span:nth-child(5) { animation-delay: 520ms; }

@keyframes letter-in {
    to { opacity: 1; transform: translateY(0); }
}

.hero-sub {
    font-family: var(--f-heading);
    font-weight: 300;
    font-size: clamp(0.85rem, 1.2vw, 1rem);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--c-text);
    margin-top: 2.4rem;
    opacity: 0;
    animation: sub-in 900ms var(--ease-out) forwards;
    animation-delay: 900ms;
    position: relative;
    z-index: 2;
}

@keyframes sub-in {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.scroll-hint {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 5.5vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--c-muted);
    opacity: 0;
    animation:
        hint-in 1000ms var(--ease-out) forwards,
        chevron-pulse 2s ease-in-out infinite 1800ms;
    animation-delay: 1600ms;
}

.scroll-hint .chevron {
    width: 22px;
    height: 22px;
}

@keyframes hint-in     { to { opacity: 0.7; } }
@keyframes chevron-pulse {
    0%, 100% { opacity: 0.3; }
    50%      { opacity: 0.75; }
}

/* -------------------------------------------------------------------------- */
/* 6. Typography primitives                                                    */
/* -------------------------------------------------------------------------- */

.label {
    display: inline-block;
    font-family: var(--f-mono);
    font-size: 0.82rem;
    font-weight: 400;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(74, 234, 220, 0.6);
    margin-bottom: 1.6rem;
}

.mono { font-family: var(--f-mono); letter-spacing: 0.04em; }
.mono.small { font-size: 0.72rem; }

.section-title {
    font-family: var(--f-heading);
    font-weight: 300;
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--c-text);
    margin-bottom: 2.2rem;
    line-height: 1.15;
}

.body {
    font-family: var(--f-body);
    font-weight: 300;
    color: var(--c-text);
    max-width: var(--narrow);
    margin-bottom: 1.4rem;
}

.body.soft {
    color: var(--c-muted);
}

.body .emph {
    color: var(--c-cyan);
    font-weight: 500;
}

.panel-lead {
    font-size: clamp(1.1rem, 1.9vw, 1.3rem);
    max-width: 72ch;
    margin-left: auto;
    margin-right: auto;
}

/* Inline link */
.ilink {
    color: var(--c-cyan);
    text-decoration: none;
    position: relative;
    font-weight: 500;
    transition: color 300ms var(--ease-out);
}

.ilink::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    height: 1px;
    width: 100%;
    background: var(--c-amber);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 300ms var(--ease-out);
}

.ilink:hover {
    color: var(--c-amber);
}

.ilink:hover::after {
    transform: scaleX(1);
}

/* -------------------------------------------------------------------------- */
/* 7. Discipline list                                                          */
/* -------------------------------------------------------------------------- */

.discipline-list {
    list-style: none;
    margin-top: 2.8rem;
    border-top: 1px solid rgba(74, 234, 220, 0.12);
}

.discipline-list li {
    display: grid;
    grid-template-columns: 3rem 14rem 1fr;
    gap: 1.4rem;
    padding: 1.6rem 0;
    border-bottom: 1px solid rgba(74, 234, 220, 0.12);
    align-items: baseline;
    transition: border-color 400ms var(--ease-out);
}

.discipline-list li:hover {
    border-bottom-color: rgba(74, 234, 220, 0.35);
}

.discipline-list .mono {
    color: var(--c-muted);
    font-size: 0.8rem;
}

.disc-name {
    font-family: var(--f-heading);
    font-weight: 300;
    font-size: 1.1rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-cyan);
}

.disc-desc {
    color: var(--c-text);
    font-weight: 300;
    font-size: 0.98rem;
    line-height: 1.6;
}

@media (max-width: 720px) {
    .discipline-list li {
        grid-template-columns: 2rem 1fr;
    }
    .discipline-list .disc-desc {
        grid-column: 2 / 3;
    }
}

/* -------------------------------------------------------------------------- */
/* 8. Principles grid                                                          */
/* -------------------------------------------------------------------------- */

.principles {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.4rem;
    margin-top: 3rem;
}

.principle {
    position: relative;
    padding: 2rem 1.8rem;
    background: var(--c-surface);
    border: 1px solid rgba(74, 234, 220, 0.10);
    border-radius: 2px;
    transition: border-color 400ms var(--ease-out), transform 400ms var(--ease-out);
    overflow: hidden;
}

.principle::before {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg,
        transparent,
        rgba(74, 234, 220, 0.4),
        transparent);
    opacity: 0.5;
    filter: blur(2px);
    pointer-events: none;
}

.principle:hover {
    border-color: rgba(74, 234, 220, 0.30);
    transform: translateY(-2px);
}

.principle .mono {
    color: var(--c-magenta);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
}

.principle h3 {
    font-family: var(--f-heading);
    font-weight: 300;
    font-size: 1.3rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--c-cyan);
    margin: 0.8rem 0 0.9rem;
}

.principle p {
    color: var(--c-text);
    font-weight: 300;
    font-size: 0.95rem;
    line-height: 1.65;
    margin: 0;
}

@media (max-width: 720px) {
    .principles { grid-template-columns: 1fr; }
}

/* -------------------------------------------------------------------------- */
/* 9. Timeline                                                                 */
/* -------------------------------------------------------------------------- */

.timeline {
    list-style: none;
    margin-top: 3rem;
    position: relative;
    padding-left: 0;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 3rem;
    top: 0.4rem;
    bottom: 0.4rem;
    width: 1px;
    background: linear-gradient(180deg,
        rgba(74, 234, 220, 0) 0%,
        rgba(74, 234, 220, 0.35) 10%,
        rgba(74, 234, 220, 0.35) 90%,
        rgba(74, 234, 220, 0) 100%);
}

.timeline li {
    position: relative;
    display: grid;
    grid-template-columns: 6rem 1fr;
    gap: 1.4rem;
    padding: 1.4rem 0 1.6rem;
    align-items: flex-start;
}

.timeline li::before {
    content: "";
    position: absolute;
    left: calc(3rem - 4px);
    top: 1.6rem;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--c-void);
    border: 1px solid var(--c-cyan);
    box-shadow: 0 0 8px rgba(74, 234, 220, 0.6);
}

.step-num {
    color: var(--c-muted);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    padding-top: 0.2rem;
}

.step-body h4 {
    font-family: var(--f-heading);
    font-weight: 300;
    font-size: 1.15rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-cyan);
    margin: 0 0 0.4rem;
}

.step-body p {
    color: var(--c-text);
    font-weight: 300;
    font-size: 0.98rem;
    line-height: 1.65;
    margin: 0;
}

@media (max-width: 600px) {
    .timeline::before { left: 2.4rem; }
    .timeline li { grid-template-columns: 4.5rem 1fr; gap: 1rem; }
    .timeline li::before { left: calc(2.4rem - 4px); }
}

/* -------------------------------------------------------------------------- */
/* 10. Closing mark                                                            */
/* -------------------------------------------------------------------------- */

.zone-closing {
    padding-top: 6vh;
    padding-bottom: 6vh;
    text-align: center;
}

.mark-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.4rem;
    color: var(--c-muted);
}

.mark-block .rule {
    width: min(60vw, 420px);
    height: 1px;
    background: linear-gradient(90deg,
        transparent,
        rgba(74, 234, 220, 0.5) 50%,
        transparent);
    position: relative;
}

.mark-block .rule::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 6px;
    height: 6px;
    margin: -3px 0 0 -3px;
    border-radius: 50%;
    background: var(--c-cyan);
    box-shadow: 0 0 10px var(--c-cyan);
}

/* -------------------------------------------------------------------------- */
/* 11. Viewport-bottom pulsing rule                                            */
/* -------------------------------------------------------------------------- */

.viewport-rule {
    position: fixed;
    left: var(--gutter);
    right: var(--gutter);
    bottom: 2vh;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(74, 234, 220, 0.35) 50%,
        transparent 100%);
    z-index: 15;
    pointer-events: none;
    animation: rule-pulse 4s ease-in-out infinite;
}

@keyframes rule-pulse {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 0.85; }
}

/* -------------------------------------------------------------------------- */
/* 12. Reveal animation                                                        */
/* -------------------------------------------------------------------------- */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition:
        opacity 800ms var(--ease-out),
        transform 800ms var(--ease-out);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.reveal .label,
.reveal .section-title,
.reveal .body,
.reveal .discipline-list,
.reveal .principles,
.reveal .timeline,
.reveal .mark-block {
    opacity: 0;
    transform: translateY(12px);
    transition:
        opacity 700ms var(--ease-out),
        transform 700ms var(--ease-out);
}

.reveal.is-visible .label          { transition-delay: 0ms;   opacity: 1; transform: translateY(0); }
.reveal.is-visible .section-title  { transition-delay: 150ms; opacity: 1; transform: translateY(0); }
.reveal.is-visible .body           { transition-delay: 260ms; opacity: 1; transform: translateY(0); }
.reveal.is-visible .body:nth-of-type(2) { transition-delay: 360ms; }
.reveal.is-visible .discipline-list,
.reveal.is-visible .principles,
.reveal.is-visible .timeline,
.reveal.is-visible .mark-block {
    transition-delay: 460ms;
    opacity: 1;
    transform: translateY(0);
}

/* -------------------------------------------------------------------------- */
/* 13. Responsive trims                                                        */
/* -------------------------------------------------------------------------- */

@media (max-width: 720px) {
    :root {
        --gutter: 6vw;
    }
    .logo-glyph {
        font-size: 1.05rem;
    }
}

@media (max-width: 480px) {
    :root {
        --gutter: 5vw;
    }
    .hero-sub {
        letter-spacing: 0.2em;
    }
}