/* =========================================================
   mujun.work — Where contradictions work.
   Corporate consultancy aesthetic, Swiss typographic structure.
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
    --c-white: #f5f5f7;          /* Corporate White (primary background) */
    --c-section-gray: #f0f0f2;   /* Section Gray */
    --c-ink: #1d1d1f;            /* Slate Black */
    --c-blue: #0066cc;           /* Strategy Blue (structure) */
    --c-red: #e63946;            /* Tension Red (culture) */
    --c-green: #2d6a4f;          /* Resolution Green (process) */
    --c-meta: #6c757d;           /* Professional Gray */
    --c-rule: #e0e0e0;           /* Hairline rules */

    --f-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
    --f-body: 'Barlow', 'Roboto', system-ui, sans-serif;
    --f-mono: 'Roboto Mono', 'Menlo', monospace;

    --nav-h: 56px;
    --maxw: 1240px;
    --pad-x: clamp(1.25rem, 4vw, 4rem);

    --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img, svg { display: block; max-width: 100%; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }

body {
    font-family: var(--f-body);
    font-weight: 400;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--c-ink);
    background: var(--c-white);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* ---------- Top Navigation ---------- */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    background: rgba(245, 245, 247, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--c-rule);
    z-index: 100;
    transition: box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}
.top-nav.is-scrolled {
    box-shadow: 0 2px 16px rgba(29, 29, 31, 0.06);
    background: rgba(245, 245, 247, 0.92);
}
.nav-inner {
    height: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 var(--pad-x);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}
.nav-brand {
    display: inline-flex;
    align-items: baseline;
    gap: 0.55rem;
    font-family: var(--f-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}
.brand-mark {
    font-family: 'Noto Sans KR', 'Apple SD Gothic Neo', var(--f-body);
    font-size: 1.05rem;
    color: var(--c-blue);
    letter-spacing: 0;
    transform: translateY(1px);
}
.brand-text {
    font-size: 1.05rem;
    color: var(--c-ink);
    letter-spacing: 0.04em;
}
.nav-links {
    display: flex;
    gap: 2.25rem;
    font-family: var(--f-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}
.nav-links a {
    color: var(--c-meta);
    position: relative;
    padding: 0.25rem 0;
    transition: color 0.2s var(--ease);
}
.nav-links a::after {
    content: '';
    position: absolute;
    left: 0; right: 100%;
    bottom: -2px;
    height: 1px;
    background: var(--c-ink);
    transition: right 0.3s var(--ease);
}
.nav-links a:hover { color: var(--c-ink); }
.nav-links a:hover::after { right: 0; }
.nav-links a.is-active {
    color: var(--c-ink);
}
.nav-links a.is-active::after { right: 0; background: var(--c-blue); }

.nav-meta {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--c-meta);
}
.status-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--c-green);
    margin-right: 0.55rem;
    transform: translateY(-1px);
    box-shadow: 0 0 0 0 rgba(45, 106, 79, 0.45);
    animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
    0%   { box-shadow: 0 0 0 0 rgba(45, 106, 79, 0.5); }
    70%  { box-shadow: 0 0 0 8px rgba(45, 106, 79, 0); }
    100% { box-shadow: 0 0 0 0 rgba(45, 106, 79, 0); }
}

/* ---------- Section primitives ---------- */
.section {
    padding: clamp(4rem, 9vw, 7rem) 0;
    border-bottom: 1px solid var(--c-rule);
}
.section--white { background: var(--c-white); }
.section--gray { background: var(--c-section-gray); }

.section-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 var(--pad-x);
}

.section-head {
    display: grid;
    grid-template-columns: 5rem 1fr;
    column-gap: clamp(1.25rem, 3vw, 2.5rem);
    row-gap: 0.5rem;
    align-items: start;
    margin-bottom: clamp(2rem, 5vw, 3.5rem);
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--c-rule);
}
.section-num {
    font-family: var(--f-mono);
    font-size: 0.8rem;
    color: var(--c-meta);
    letter-spacing: 0.14em;
    padding-top: 0.85rem;
}
.section-title {
    font-family: var(--f-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: -0.01em;
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 0.95;
    margin: 0;
    grid-column: 2;
    color: var(--c-ink);
}
.section-lede {
    grid-column: 2;
    max-width: 56ch;
    color: var(--c-meta);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0.75rem 0 0;
}
.section-lede .legend {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-right: 1rem;
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-ink);
    white-space: nowrap;
}
.section-lede .legend i {
    display: inline-block;
    width: 14px;
    height: 4px;
    border-radius: 1px;
}

/* ---------- HERO ---------- */
.hero {
    min-height: 100vh;
    padding-top: calc(var(--nav-h) + clamp(2rem, 6vw, 4rem));
    padding-bottom: clamp(3rem, 8vw, 6rem);
    display: flex;
    align-items: center;
    background:
        linear-gradient(to bottom, var(--c-white) 0%, var(--c-white) 100%);
    position: relative;
    border-bottom: 1px solid var(--c-rule);
    overflow: hidden;
}
.hero::before {
    /* Faint Swiss grid in the background */
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, rgba(29, 29, 31, 0.04) 1px, transparent 1px);
    background-size: calc(100% / 12) 100%;
    pointer-events: none;
    opacity: 0.6;
}
.hero-grid {
    position: relative;
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 var(--pad-x);
}
.hero-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-family: var(--f-mono);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--c-meta);
    margin-bottom: clamp(1.5rem, 4vw, 2.25rem);
}
.meta-divider {
    flex: 0 0 32px;
    height: 1px;
    background: var(--c-meta);
    opacity: 0.5;
}
.hero-title {
    font-family: var(--f-display);
    font-weight: 700;
    text-transform: uppercase;
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 0.9;
    letter-spacing: -0.02em;
    margin: 0;
    color: var(--c-ink);
}
.hero-title .dot {
    color: var(--c-blue);
}
.hero-rule {
    width: clamp(160px, 22vw, 320px);
    height: 1px;
    background: var(--c-ink);
    margin: clamp(1.5rem, 3vw, 2rem) 0 clamp(1rem, 2vw, 1.25rem);
}
.hero-tagline {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: clamp(1.25rem, 2.4vw, 1.75rem);
    text-transform: none;
    letter-spacing: 0;
    color: var(--c-ink);
    margin: 0 0 clamp(2.5rem, 6vw, 4rem);
    max-width: 38ch;
}
.hero-foot {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1rem, 3vw, 2.5rem);
    padding-top: 1.25rem;
    border-top: 1px solid var(--c-rule);
}
.hero-foot-col {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}
.foot-key {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--c-meta);
}
.foot-val {
    font-family: var(--f-body);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--c-ink);
    line-height: 1.4;
}

/* ---------- PRACTICE GRID ---------- */
.practice-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
}
.practice-card {
    background: var(--c-white);
    border: 1px solid var(--c-rule);
    border-left: 4px solid var(--c-ink);
    padding: clamp(1.5rem, 3vw, 2rem);
    transition: transform 0.4s var(--ease), border-left-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
    position: relative;
}
.section--gray .practice-card { background: var(--c-white); }
.section--white .practice-card { background: var(--c-section-gray); border-color: var(--c-rule); }
.practice-card:nth-child(1) { border-left-color: var(--c-blue); }
.practice-card:nth-child(2) { border-left-color: var(--c-red); }
.practice-card:nth-child(3) { border-left-color: var(--c-green); }
.practice-card:nth-child(4) { border-left-color: var(--c-meta); }
.practice-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px -16px rgba(29, 29, 31, 0.18);
}
.practice-card .card-num {
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    color: var(--c-meta);
    text-transform: uppercase;
}
.practice-card h3 {
    font-family: var(--f-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.01em;
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    line-height: 1;
    margin: 0.6rem 0 0.85rem;
    color: var(--c-ink);
}
.practice-card p {
    margin: 0;
    color: var(--c-ink);
    font-size: 0.95rem;
    line-height: 1.65;
}

/* ---------- CONTRADICTION BLOCKS ---------- */
.contradiction-stack {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.contradiction-block {
    background: var(--c-white);
    border: 1px solid var(--c-rule);
    border-left: 4px solid var(--c-meta);
    padding: clamp(1.5rem, 3vw, 2.25rem) clamp(1.5rem, 3vw, 2.5rem);
    transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease);
    opacity: 0;
    transform: translateY(18px);
    will-change: opacity, transform;
}
.contradiction-block.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.contradiction-block--structure { border-left-color: var(--c-blue); }
.contradiction-block--culture   { border-left-color: var(--c-red); }
.contradiction-block--process   { border-left-color: var(--c-green); }

.contradiction-block:hover {
    box-shadow: 0 18px 42px -22px rgba(29, 29, 31, 0.22);
}

.cb-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
    padding-bottom: 1.1rem;
    margin-bottom: clamp(1.25rem, 2.5vw, 1.75rem);
    border-bottom: 1px solid var(--c-rule);
}
.cb-id {
    font-family: var(--f-mono);
    font-size: 0.78rem;
    color: var(--c-ink);
    letter-spacing: 0.12em;
    background: var(--c-section-gray);
    padding: 0.25rem 0.6rem;
}
.cb-cat {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-meta);
}
.contradiction-block--structure .cb-cat { color: var(--c-blue); }
.contradiction-block--culture   .cb-cat { color: var(--c-red); }
.contradiction-block--process   .cb-cat { color: var(--c-green); }
.cb-spread {
    margin-left: auto;
    font-family: var(--f-mono);
    font-size: 0.72rem;
    color: var(--c-meta);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.cb-spread strong {
    color: var(--c-ink);
    font-weight: 500;
}

.cb-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}
.cb-cell {
    border-top: 1px solid var(--c-rule);
    padding: 1.1rem 0 0;
    display: flex;
    flex-direction: column;
}
.cell-tag {
    font-family: var(--f-mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-meta);
    margin-bottom: 0.55rem;
}
.cell-tag--thesis    { color: var(--c-blue); }
.cell-tag--antithesis { color: var(--c-red); }
.cell-tag--synthesis { color: var(--c-green); }

.cb-name h3 {
    font-family: var(--f-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: -0.005em;
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    line-height: 0.98;
    margin: 0 0 0.7rem;
    color: var(--c-ink);
}
.cb-name p {
    color: var(--c-meta);
    font-size: 0.92rem;
    margin: 0;
}
.cb-cell p {
    margin: 0;
    color: var(--c-ink);
    font-size: 0.95rem;
    line-height: 1.65;
}

/* ---------- METHOD TABLE ---------- */
.method-table {
    border-top: 1px solid var(--c-rule);
    margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}
.method-row {
    display: grid;
    grid-template-columns: 1.2fr 2fr 1.2fr 0.8fr;
    gap: 1.25rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--c-rule);
    align-items: baseline;
    font-size: 0.95rem;
}
.method-row--head {
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--c-meta);
    padding: 0.75rem 0;
}
.m-phase {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    font-family: var(--f-display);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 1.1rem;
    letter-spacing: 0.01em;
    color: var(--c-ink);
}
.m-phase i {
    display: inline-block;
    width: 14px;
    height: 4px;
    border-radius: 1px;
}

.method-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
    border-top: 1px solid var(--c-rule);
    padding-top: clamp(1.5rem, 4vw, 2.5rem);
}
.stat {
    border-left: 4px solid var(--c-rule);
    padding: 0.5rem 0 0.5rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    position: relative;
}
.stat:nth-child(1) { border-left-color: var(--c-blue); }
.stat:nth-child(2) { border-left-color: var(--c-red); }
.stat:nth-child(3) { border-left-color: var(--c-green); }
.stat:nth-child(4) { border-left-color: var(--c-meta); }

.stat-num {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: clamp(2.5rem, 5.5vw, 4rem);
    line-height: 0.9;
    letter-spacing: -0.02em;
    color: var(--c-ink);
}
.stat-suffix {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    color: var(--c-meta);
    margin-top: -0.5rem;
    margin-left: 0.15rem;
    line-height: 1;
}
.stat-label {
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--c-meta);
    line-height: 1.5;
    margin-top: 0.4rem;
}

/* ---------- ENGAGEMENT ---------- */
.engagement-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}
.engagement-col {
    background: var(--c-white);
    border: 1px solid var(--c-rule);
    border-left: 4px solid var(--c-meta);
    padding: clamp(1.5rem, 3vw, 2rem);
}
.engagement-col:nth-child(1) { border-left-color: var(--c-blue); }
.engagement-col:nth-child(2) { border-left-color: var(--c-red); }
.engagement-col:nth-child(3) { border-left-color: var(--c-green); }

.engagement-col h3 {
    font-family: var(--f-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.01em;
    font-size: clamp(1.4rem, 2.4vw, 1.8rem);
    line-height: 1;
    margin: 0 0 1.1rem;
    color: var(--c-ink);
}
.bare-list li {
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--c-rule);
    color: var(--c-ink);
    font-size: 0.95rem;
    line-height: 1.55;
}
.bare-list li:last-child { border-bottom: 0; }
.engagement-col--contact .contact-line {
    color: var(--c-meta);
    margin: 0 0 1rem;
}
.contact-mail {
    display: inline-block;
    font-family: var(--f-display);
    font-weight: 700;
    text-transform: uppercase;
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    letter-spacing: -0.005em;
    color: var(--c-blue);
    border-bottom: 2px solid var(--c-blue);
    padding-bottom: 0.15rem;
    transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.contact-mail:hover {
    color: var(--c-ink);
    border-bottom-color: var(--c-ink);
}
.contact-meta {
    margin: 1rem 0 0;
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--c-meta);
}

/* ---------- FOOTER ---------- */
.site-foot {
    background: var(--c-ink);
    color: var(--c-white);
    padding: clamp(3rem, 6vw, 5rem) 0 clamp(2rem, 4vw, 3rem);
}
.foot-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 var(--pad-x);
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: clamp(2rem, 6vw, 4rem);
    align-items: start;
}
.site-foot .foot-brand {
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
    font-family: var(--f-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    font-size: 1.4rem;
}
.site-foot .brand-mark { color: var(--c-blue); font-size: 1.4rem; }
.site-foot .brand-text { color: var(--c-white); font-size: 1.4rem; }

.foot-cols {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}
.foot-col { display: flex; flex-direction: column; gap: 0.35rem; }
.site-foot .foot-key { color: rgba(245, 245, 247, 0.5); }
.site-foot .foot-val { color: var(--c-white); font-weight: 400; }

.foot-meta {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: clamp(2rem, 4vw, 3rem);
    padding-top: 1.25rem;
    border-top: 1px solid rgba(245, 245, 247, 0.15);
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(245, 245, 247, 0.55);
}

/* ---------- Reveal animation ---------- */
.reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
    .nav-meta { display: none; }
    .nav-links { gap: 1.25rem; }
    .practice-grid { grid-template-columns: 1fr; }
    .engagement-grid { grid-template-columns: 1fr; }
    .method-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .foot-inner { grid-template-columns: 1fr; }
    .foot-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .hero-foot { grid-template-columns: 1fr; gap: 1.25rem; }
    .method-row { grid-template-columns: 1fr 1fr; }
    .method-row--head { display: none; }
    .method-row span:nth-child(1) { grid-column: 1 / -1; margin-bottom: 0.25rem; }
    .method-row span:nth-child(2) { grid-column: 1 / -1; color: var(--c-meta); }
    .method-row span:nth-child(3)::before { content: 'Artefact · '; color: var(--c-meta); font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; }
    .method-row span:nth-child(4)::before { content: 'Duration · '; color: var(--c-meta); font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; }
}

@media (max-width: 720px) {
    .nav-links { display: none; }
    .section-head { grid-template-columns: 1fr; }
    .section-num { padding-top: 0; }
    .section-title { grid-column: 1; }
    .section-lede { grid-column: 1; }
    .cb-grid { grid-template-columns: 1fr; }
    .method-stats { grid-template-columns: 1fr; }
    .foot-cols { grid-template-columns: 1fr; }
    .hero { min-height: auto; padding-top: calc(var(--nav-h) + 3rem); padding-bottom: 4rem; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        transition-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
    }
    .contradiction-block,
    .reveal { opacity: 1; transform: none; }
}