/* ============================================================
   continuum.quest — Chrome-Holographic Design System
   ============================================================ */

/* ---- CSS Variables / Design Tokens ---- */
:root {
    --bg-primary: #0c0c10;
    --bg-alt: #18181c;
    --surface: #2a2a32;
    --border-chrome: #71717a;
    --text-primary: #d4d4d8;
    --text-heading: #fafafa;
    --accent-green: #22d3a4;
    --accent-violet: #a78bfa;
    --accent-rose: #f472b6;
    --organic-ground: #0a1f0f;
    --deep-violet: #1a1028;
    --spectral-violet-deep: #7b5ea7;
    --silver-mist-light: #c0c0c0;
    --chrome-silver: #c8c8d0;

    --font-display: 'Outfit', sans-serif;
    --font-body: 'IBM Plex Sans', sans-serif;
    --font-mono: 'Space Mono', monospace;

    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-settle: cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.2vw, 1.15rem);
    line-height: 1.7;
    letter-spacing: 0.01em;
    overflow-x: hidden;
}

/* ---- Holographic Overlay ---- */
#holographic-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    mix-blend-mode: overlay;
    opacity: 0.03;
    background: conic-gradient(
        from 0deg at 50% 50%,
        var(--accent-green),
        var(--accent-violet),
        var(--accent-rose),
        var(--accent-green)
    );
    background-size: 200% 200%;
    animation: holographicShift 12s linear infinite;
}

@keyframes holographicShift {
    0% { background-position: 0% 0%; filter: hue-rotate(0deg); }
    100% { background-position: 100% 100%; filter: hue-rotate(360deg); }
}

/* ---- SVG Vein Network ---- */
#vein-network {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    pointer-events: none;
    opacity: 0.35;
}

#vein-network path {
    stroke-dasharray: var(--dash-length, 2000);
    stroke-dashoffset: var(--dash-length, 2000);
    transition: stroke-dashoffset 3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

#vein-network path.drawn {
    stroke-dashoffset: 0;
}

/* ---- Particle Canvas ---- */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 2;
    pointer-events: none;
    transition: opacity 0.8s var(--ease-settle);
}

#particle-canvas.faded {
    opacity: 0;
}

/* ============================================================
   THRESHOLD SECTION
   ============================================================ */
.section-threshold {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    overflow: hidden;
    z-index: 5;
}

.threshold-leaf-bg {
    position: absolute;
    top: -10%;
    right: -10%;
    width: 60%;
    height: 120%;
    background: radial-gradient(ellipse at 70% 30%, rgba(113, 113, 122, 0.12), transparent 70%),
                radial-gradient(ellipse at 50% 50%, rgba(42, 42, 50, 0.25), transparent 60%);
    opacity: 0;
    animation: leafFadeIn 2s cubic-bezier(0.25, 0.1, 0.25, 1) 0.5s forwards;
    filter: saturate(0.2);
}

/* Simulated chrome-leaf texture using layered gradients */
.threshold-leaf-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(
            35deg,
            transparent,
            transparent 40px,
            rgba(113, 113, 122, 0.04) 40px,
            rgba(113, 113, 122, 0.04) 41px
        ),
        repeating-linear-gradient(
            -25deg,
            transparent,
            transparent 60px,
            rgba(113, 113, 122, 0.03) 60px,
            rgba(113, 113, 122, 0.03) 61px
        ),
        repeating-linear-gradient(
            70deg,
            transparent,
            transparent 80px,
            rgba(167, 139, 250, 0.02) 80px,
            rgba(167, 139, 250, 0.02) 81px
        );
}

@keyframes leafFadeIn {
    to { opacity: 0.3; }
}

.threshold-content {
    position: relative;
    z-index: 10;
    padding-left: 20%;
    max-width: 80%;
}

/* Kinetic Title */
#kinetic-title {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    letter-spacing: 0.06em;
    line-height: 1.05;
    color: transparent;
    display: flex;
    flex-wrap: wrap;
}

#kinetic-title .char {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-violet), var(--accent-rose));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    opacity: 0;
    animation: charAppear 0.4s var(--ease-smooth) forwards,
               holographicGradient 8s linear infinite;
    animation-delay: var(--char-delay), var(--char-delay);
    transform-style: preserve-3d;
    perspective: 800px;
}

#kinetic-title .char.animated {
    animation: charAppear 0.4s var(--ease-smooth) forwards,
               holographicGradient 8s linear infinite,
               kineticRotate 4s cubic-bezier(0.25, 0.1, 0.25, 1) var(--wave-delay) 1;
}

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

@keyframes holographicGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes kineticRotate {
    0%, 100% { transform: rotateY(0deg); }
    25% { transform: rotateY(8deg); }
    75% { transform: rotateY(-8deg); }
}

/* Threshold subtitle */
.threshold-subtitle {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.2vw, 1.15rem);
    line-height: 1.7;
    color: var(--text-primary);
    max-width: 520px;
    margin-top: 2rem;
    opacity: 0;
    animation: subtitleAppear 1s var(--ease-settle) 2s forwards;
}

@keyframes subtitleAppear {
    to {
        opacity: 1;
    }
}

/* ============================================================
   NARRATIVE SECTION
   ============================================================ */
.section-narrative {
    position: relative;
    z-index: 5;
    padding: 12vh 8vw;
}

.narrative-panel {
    background: var(--bg-alt);
    border: 1px solid transparent;
    padding: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: 10vh;
    max-width: 60%;
    position: relative;
    opacity: 0;
    transition: opacity 600ms var(--ease-smooth),
                transform 600ms var(--ease-smooth);

    /* Holographic border */
    background-image: linear-gradient(var(--bg-alt), var(--bg-alt)),
                      linear-gradient(var(--holo-angle, 0deg), var(--accent-green), var(--accent-violet), var(--accent-rose), var(--accent-green));
    background-origin: border-box;
    background-clip: padding-box, border-box;
    animation: borderRotate 6s linear infinite;
}

@keyframes borderRotate {
    0% { --holo-angle: 0deg; }
    100% { --holo-angle: 360deg; }
}

/* Register custom property for animation */
@property --holo-angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

.narrative-panel.panel-left {
    margin-right: auto;
    transform: translateX(-20px);
}

.narrative-panel.panel-right {
    margin-left: auto;
    transform: translateX(20px);
}

.narrative-panel.visible {
    opacity: 1;
    transform: translateX(0);
}

.narrative-panel:hover {
    transform: translateY(-4px);
    transition: transform 400ms var(--ease-spring);
    box-shadow: 0 8px 32px rgba(34, 211, 164, 0.08);
}

.narrative-panel h2 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 3.5rem);
    letter-spacing: 0.06em;
    line-height: 1.05;
    color: var(--text-heading);
    margin-bottom: 1.2rem;
    display: flex;
    flex-wrap: wrap;
}

.narrative-panel h2 .char {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-violet), var(--accent-rose));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: holographicGradient 8s linear infinite;
    transform-style: preserve-3d;
}

.narrative-panel h2 .char.animated {
    animation: holographicGradient 8s linear infinite,
               kineticRotate 3s cubic-bezier(0.25, 0.1, 0.25, 1) var(--wave-delay) 1;
}

.narrative-panel p {
    color: var(--text-primary);
    font-size: clamp(1rem, 1.2vw, 1.15rem);
    line-height: 1.7;
}

.panel-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #a1a1aa;
    display: block;
    margin-bottom: 1rem;
}

/* ============================================================
   CONTINUUM ZONE (200vh)
   ============================================================ */
.section-continuum {
    position: relative;
    z-index: 5;
    min-height: 200vh;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: flex-start;
    padding: 20vh 8vw;
    transition: background-color 0.1s linear;
}

.continuum-phase {
    max-width: 65%;
    padding: 6vh 0;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 800ms var(--ease-smooth),
                transform 800ms var(--ease-smooth);
}

.continuum-phase.visible {
    opacity: 1;
    transform: translateY(0);
}

.continuum-phase-1 {
    padding-left: 15%;
}

.continuum-phase-2 {
    padding-left: 25%;
}

.continuum-phase-3 {
    padding-left: 10%;
}

.continuum-heading {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(3rem, 7vw, 6rem);
    letter-spacing: 0.06em;
    line-height: 1.05;
    color: transparent;
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.continuum-heading .char {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-violet), var(--accent-rose));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: holographicGradient 8s linear infinite;
    transform-style: preserve-3d;
}

.continuum-heading .char.animated {
    animation: holographicGradient 8s linear infinite,
               kineticRotate 3s cubic-bezier(0.25, 0.1, 0.25, 1) var(--wave-delay) 1;
}

.continuum-desc {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.4vw, 1.25rem);
    line-height: 1.7;
    color: var(--text-primary);
    max-width: 480px;
}

/* ============================================================
   ARCHIVE SECTION
   ============================================================ */
.section-archive {
    position: relative;
    z-index: 5;
    padding: 12vh 8vw;
}

.archive-title {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    letter-spacing: 0.06em;
    line-height: 1.05;
    color: var(--text-heading);
    margin-bottom: 8vh;
    display: flex;
    flex-wrap: wrap;
}

.archive-title .char {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-violet), var(--accent-rose));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: holographicGradient 8s linear infinite;
    transform-style: preserve-3d;
}

.archive-title .char.animated {
    animation: holographicGradient 8s linear infinite,
               kineticRotate 3s cubic-bezier(0.25, 0.1, 0.25, 1) var(--wave-delay) 1;
}

.archive-grid {
    display: flex;
    gap: 3vw;
}

.archive-col-major {
    flex: 0 0 61.8%;
    display: flex;
    flex-direction: column;
    gap: 3vh;
}

.archive-col-minor {
    flex: 0 0 38.2%;
    display: flex;
    flex-direction: column;
    gap: 3vh;
}

.archive-card {
    background: var(--surface);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    position: relative;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 600ms var(--ease-smooth),
                transform 400ms var(--ease-settle);
    cursor: default;

    /* Holographic border */
    border: 1px solid transparent;
    background-image: linear-gradient(var(--surface), var(--surface)),
                      linear-gradient(var(--card-holo-angle, 0deg), var(--accent-green), var(--accent-violet), var(--accent-rose), var(--accent-green));
    background-origin: border-box;
    background-clip: padding-box, border-box;
    animation: cardBorderRotate 6s linear infinite;
}

@property --card-holo-angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

@keyframes cardBorderRotate {
    0% { --card-holo-angle: 0deg; }
    100% { --card-holo-angle: 360deg; }
}

.archive-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.archive-card:hover {
    transform: translateY(-4px);
    transition: transform 400ms var(--ease-spring);
    box-shadow: 0 8px 32px rgba(34, 211, 164, 0.08);
}

.archive-card h3 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    letter-spacing: 0.03em;
    line-height: 1.2;
    color: var(--text-heading);
    margin-bottom: 0.8rem;
}

.archive-card p {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(0.9rem, 1.1vw, 1rem);
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.card-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #a1a1aa;
    display: block;
    margin-bottom: 0.8rem;
}

.card-meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #71717a;
    display: block;
}

/* ============================================================
   FOOTER
   ============================================================ */
.section-footer {
    position: relative;
    z-index: 5;
    width: 70%;
    padding: 6vh 8vw 8vh;
}

.footer-vein {
    width: 100%;
    height: 2px;
    margin-bottom: 2rem;
    overflow: visible;
}

.footer-vein line {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    transition: stroke-dashoffset 1.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.footer-vein.drawn line {
    stroke-dashoffset: 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-domain {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 0.85rem;
    color: var(--border-chrome);
    letter-spacing: 0.06em;
}

.footer-statement {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--border-chrome);
}

.breathing-text {
    animation: breathing 4s ease-in-out infinite;
}

@keyframes breathing {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .narrative-panel {
        max-width: 80%;
    }

    .archive-grid {
        flex-direction: column;
    }

    .archive-col-major,
    .archive-col-minor {
        flex: 1 1 100%;
    }

    .continuum-phase {
        max-width: 85%;
    }

    .continuum-phase-1,
    .continuum-phase-2,
    .continuum-phase-3 {
        padding-left: 5%;
    }
}

@media (max-width: 768px) {
    .threshold-content {
        padding-left: 8%;
        max-width: 92%;
    }

    .narrative-panel {
        max-width: 95%;
    }

    .narrative-panel.panel-right {
        margin-left: 0;
        margin-right: auto;
    }

    .section-footer {
        width: 90%;
    }

    .section-narrative {
        padding: 8vh 5vw;
    }

    .section-archive {
        padding: 8vh 5vw;
    }

    .continuum-phase {
        max-width: 95%;
        padding-left: 2% !important;
    }
}

/* ---- Selection styling ---- */
::selection {
    background: rgba(167, 139, 250, 0.3);
    color: var(--text-heading);
}

/* ---- Scrollbar styling ---- */
::-webkit-scrollbar {
    width: 4px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-chrome);
    border-radius: 2px;
}

/* ---- Continuum Zone phase-specific accents ---- */
.continuum-phase-3 .continuum-heading .char {
    background: linear-gradient(135deg, #7b5ea7, #a78bfa, #f472b6);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
}

/* ---- Chrome connector lines between narrative panels ---- */
.narrative-panel::after {
    content: '';
    position: absolute;
    bottom: -5vh;
    left: 50%;
    width: 1px;
    height: 4vh;
    background: linear-gradient(to bottom, #c0c0c0, transparent);
    opacity: 0.3;
}

.narrative-panel:last-child::after {
    display: none;
}

/* ---- Continuum zone chrome mid-state highlight ---- */
.continuum-phase-2 .continuum-desc {
    color: #c8c8d0;
}