/* ==========================================================================
   mujun.works — Precision Craft, Floating Geometry
   Aesthetic: Scandinavian-minimalist, chrome-metallic, full-bleed,
   floating cards, tilt-3d hover, surgical neon-glow accent.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Tokens
   -------------------------------------------------------------------------- */
:root {
    --color-deep-steel: #2C3E50;
    --color-blue-steel: #1A2F4C;
    --color-light-steel: #ECF0F1;
    --color-text-dark: #1A1A1A;
    --color-text-light: #F2F2F2;
    --color-chrome-silver: #D8D8D8;
    --color-neon: #00FF41;

    --neon-glow:
        0 0 8px rgba(0, 255, 65, 0.6),
        0 0 16px rgba(0, 255, 65, 0.3);

    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Consolas, monospace;

    --gutter: 32px;
    --header-h: 56px;
    --footer-h: 56px;

    --ease-tilt: cubic-bezier(0.23, 1, 0.320, 1);
    --ease-quiet: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 14px;
    line-height: 1.5;
    letter-spacing: 0.01em;
    color: var(--color-text-light);
    background-color: var(--color-deep-steel);
    overflow-x: hidden;
    transition: background-color 800ms ease-out;
    cursor: default;
}

body[data-zone="dark"] {
    background-color: var(--color-deep-steel);
    color: var(--color-text-light);
}

body[data-zone="darker"] {
    background-color: var(--color-blue-steel);
    color: var(--color-text-light);
}

body[data-zone="light"] {
    background-color: var(--color-light-steel);
    color: var(--color-text-dark);
}

ul {
    list-style: none;
}

a {
    color: inherit;
    text-decoration: none;
}

main {
    display: block;
    min-height: 100vh;
}

/* --------------------------------------------------------------------------
   Cursor trail (neon-glow accent context #3)
   -------------------------------------------------------------------------- */
.cursor-trail-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
}

.cursor-trail-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-neon);
    box-shadow: var(--neon-glow);
    transform: translate(-50%, -50%);
    opacity: 0;
    animation: trail-fade 600ms ease-out forwards;
    will-change: opacity, transform;
}

@keyframes trail-fade {
    0% {
        opacity: 0.85;
        transform: translate(-50%, -50%) scale(1);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.4);
    }
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    z-index: 100;
    background-color: transparent;
    border-bottom: 1px solid rgba(216, 216, 216, 0.08);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: border-color 600ms ease-out;
}

.header-inner {
    height: 100%;
    padding: 0 var(--gutter);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.wordmark {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 0.02em;
    color: inherit;
    transition: color 400ms ease-out;
}

.wordmark-dot {
    color: var(--color-chrome-silver);
}

.site-nav ul {
    display: flex;
    gap: 28px;
    align-items: center;
}

.nav-link {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: inherit;
    position: relative;
    padding-bottom: 4px;
    cursor: pointer;
    transition: color 200ms ease-out;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-chrome-silver);
    transition: width 280ms var(--ease-tilt);
}

.nav-link.nav--active::after {
    width: 100%;
}

.nav-link.nav--label {
    opacity: 0.5;
    cursor: default;
}

.nav-link.nav--hover {
    color: var(--color-neon);
    text-shadow: var(--neon-glow);
}

.nav-link.nav--hover::after {
    background-color: var(--color-neon);
    box-shadow: var(--neon-glow);
    width: 100%;
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--gutter);
    padding: calc(var(--header-h) + 64px) var(--gutter) 64px;
    align-items: center;
}

.hero-inner {
    grid-column: 2 / 11;
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: 1fr auto;
    gap: 64px;
    align-items: center;
    position: relative;
    /* Poised, not centered—leaning forward 12px */
    transform: translateY(-12px);
}

.hero-title {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
    max-width: 720px;
}

.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-chrome-silver);
    margin-bottom: 28px;
}

.hero-display {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(48px, 8vw, 96px);
    line-height: 1.02;
    letter-spacing: -0.01em;
    margin-bottom: 28px;
    color: inherit;
}

.hero-tagline {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 16px;
    line-height: 1.55;
    letter-spacing: 0.01em;
    color: var(--color-chrome-silver);
    max-width: 480px;
}

.hero-accent {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
    width: 240px;
    height: 240px;
    align-self: center;
    transform: translateZ(0);
    animation: hero-spin 24s linear infinite;
    will-change: transform;
}

.hero-accent-svg {
    width: 100%;
    height: 100%;
    display: block;
}

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

.hero-meta {
    grid-column: 1 / 3;
    grid-row: 2 / 3;
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 80px;
    border-top: 1px solid rgba(216, 216, 216, 0.18);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--color-chrome-silver);
    text-transform: uppercase;
}

.hero-meta-divider {
    opacity: 0.5;
}

/* --------------------------------------------------------------------------
   Portfolio: section frame
   -------------------------------------------------------------------------- */
.portfolio {
    position: relative;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--gutter);
    padding: 96px var(--gutter) 96px;
    background-color: var(--color-light-steel);
    color: var(--color-text-dark);
}

.portfolio-frame {
    grid-column: 2 / 11;
    margin-bottom: 64px;
}

.section-eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-dark);
    opacity: 0.6;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(32px, 5vw, 56px);
    line-height: 1.05;
    letter-spacing: -0.005em;
    color: var(--color-text-dark);
    max-width: 720px;
}

/* --------------------------------------------------------------------------
   Project cards: floating, tilt-3d on hover
   -------------------------------------------------------------------------- */
.project-card {
    grid-column: 2 / 11;
    perspective: 1200px;
    opacity: 0;
    transform: translateY(12px);
    transition:
        opacity 600ms ease-out,
        transform 600ms ease-out;
}

.project-card.is-revealed {
    opacity: 1;
    transform: translateY(0);
}

.project-card:nth-child(odd) {
    margin-top: 64px;
}

.project-card:nth-child(even) {
    margin-top: 32px;
}

/* First card after the frame should not get a giant top-margin */
.project-card:first-of-type {
    margin-top: 0;
}

.card {
    position: relative;
    background-color: var(--color-light-steel);
    border: 1px solid var(--color-chrome-silver);
    padding: 32px 32px 32px 36px;
    width: 100%;
    max-width: 880px;
    transform-style: preserve-3d;
    transform: perspective(1200px) rotateY(0deg) rotateX(0deg);
    transition: transform 300ms var(--ease-tilt), border-color 300ms ease-out;
    will-change: transform;
}

/* Subtle inner panel tone for variety, alternating */
.project-card:nth-child(even) .card {
    background-color: #FFFFFF;
}

/* Neon-glow accent context #1: card hover left-border */
.card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: transparent;
    transition: background-color 300ms ease-out, box-shadow 300ms ease-out;
}

.card.card--hovered {
    transform: perspective(1200px) rotateY(2deg) rotateX(-1deg);
    border-color: var(--color-text-dark);
}

.card.card--hovered::before {
    background-color: var(--color-neon);
    box-shadow: var(--neon-glow);
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-dark);
    opacity: 0.6;
    margin-bottom: 24px;
}

.card-index {
    font-weight: 400;
}

.card-year {
    font-weight: 400;
}

.card-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(24px, 3.5vw, 36px);
    line-height: 1.1;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-text-dark);
    margin-bottom: 20px;
}

.description {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 14px;
    line-height: 1.55;
    letter-spacing: 0.01em;
    color: var(--color-text-dark);
    max-width: 560px;
    margin-bottom: 28px;
}

.diagram {
    margin: 0 -32px 28px -36px;
    background-color: var(--color-light-steel);
    border-top: 1px solid var(--color-chrome-silver);
    border-bottom: 1px solid var(--color-chrome-silver);
    overflow: hidden;
}

.project-card:nth-child(even) .diagram {
    background-color: #F8F9FA;
}

.diagram svg {
    width: 100%;
    height: auto;
    display: block;
    padding: 24px 40px;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.tags {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.tags li {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-dark);
    opacity: 0.7;
    padding: 4px 8px;
    border: 1px solid var(--color-chrome-silver);
}

.cta {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-dark);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    padding: 4px 0;
    transition: color 200ms ease-out;
    cursor: pointer;
}

.cta::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1px;
    background-color: var(--color-text-dark);
    transition: background-color 200ms ease-out, box-shadow 200ms ease-out;
}

.cta-arrow {
    display: inline-block;
    transition: transform 200ms var(--ease-tilt);
}

.card.card--hovered .cta {
    color: var(--color-text-dark);
}

.card.card--hovered .cta-arrow {
    transform: translateX(6px);
}

/* Neon-glow accent context #2: cta:focus / :active */
.cta:focus-visible,
.cta:active,
.cta.cta--active {
    color: var(--color-neon);
    text-shadow: var(--neon-glow);
    outline: none;
}

.cta:focus-visible::after,
.cta:active::after,
.cta.cta--active::after {
    background-color: var(--color-neon);
    box-shadow: var(--neon-glow);
}

/* --------------------------------------------------------------------------
   Ledger
   -------------------------------------------------------------------------- */
.ledger {
    position: relative;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--gutter);
    padding: 96px var(--gutter) 96px;
    background-color: var(--color-blue-steel);
    color: var(--color-text-light);
}

.ledger-inner {
    grid-column: 2 / 11;
}

.ledger .section-eyebrow {
    color: var(--color-chrome-silver);
    opacity: 0.8;
}

.ledger .section-title {
    color: var(--color-text-light);
    margin-bottom: 56px;
}

.ledger-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
}

.ledger-list li {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 32px;
    align-items: baseline;
    padding: 24px 0;
    border-top: 1px solid rgba(216, 216, 216, 0.18);
}

.ledger-list li:last-child {
    border-bottom: 1px solid rgba(216, 216, 216, 0.18);
}

.ledger-key {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-chrome-silver);
}

.ledger-value {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(20px, 2.5vw, 28px);
    line-height: 1.2;
    letter-spacing: 0.01em;
    color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    position: relative;
    height: var(--footer-h);
    background-color: var(--color-blue-steel);
    color: var(--color-chrome-silver);
    border-top: 1px solid rgba(216, 216, 216, 0.18);
}

.footer-inner {
    height: 100%;
    padding: 0 var(--gutter);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.footer-email,
.footer-link {
    color: var(--color-chrome-silver);
    transition: color 200ms ease-out;
}

.footer-email:hover,
.footer-link:hover {
    color: var(--color-text-light);
}

.footer-social {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-divider {
    opacity: 0.4;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 980px) {
    .hero-inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-accent {
        grid-column: 1 / 2;
        grid-row: 2 / 3;
        width: 160px;
        height: 160px;
        justify-self: end;
    }

    .hero-meta {
        grid-row: 3 / 4;
        padding-top: 48px;
        flex-wrap: wrap;
    }

    .project-card,
    .portfolio-frame,
    .ledger-inner {
        grid-column: 1 / -1;
    }

    .ledger-list li {
        grid-template-columns: 140px 1fr;
        gap: 24px;
    }
}

@media (max-width: 640px) {
    :root {
        --gutter: 20px;
    }

    .hero {
        padding: calc(var(--header-h) + 40px) var(--gutter) 56px;
    }

    .hero-meta {
        font-size: 10px;
        gap: 10px;
    }

    .portfolio,
    .ledger {
        padding: 64px var(--gutter) 64px;
    }

    .card {
        padding: 24px 24px 24px 28px;
    }

    .diagram {
        margin: 0 -24px 24px -28px;
    }

    .ledger-list li {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .footer-inner {
        flex-direction: column;
        height: auto;
        gap: 8px;
        padding: 16px var(--gutter);
        text-align: center;
    }

    .site-footer {
        height: auto;
    }

    .header-inner .site-nav ul {
        gap: 16px;
    }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .hero-accent {
        animation: none;
    }
}