/* ============================================================
   RTFM — neo-brutalist one-page site
   ============================================================ */

:root {
  --yellow: #ffc91b;
  --black: #111111;
  --paper: #faf6ec;
  --white: #ffffff;
  --border: 3px solid var(--black);
  --shadow: 6px 6px 0 var(--black);
  --shadow-hover: 9px 9px 0 var(--black);
  --font-display: "Archivo Black", "IBM Plex Sans KR", system-ui, sans-serif;
  --font-body: "Space Grotesk", "IBM Plex Sans KR", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

html[lang="ko"] body {
  word-break: keep-all;
}

img, svg { display: block; }

.container {
  width: min(1100px, 100% - 3rem);
  margin-inline: auto;
}

/* ===== Brand ===== */

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--black);
}

.brand-mark {
  width: 40px;
  height: 40px;
}

.brand-mark path {
  fill: var(--yellow);
  stroke: var(--black);
  stroke-width: 24;
  stroke-linejoin: miter;
  stroke-miterlimit: 6;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.5rem;
  letter-spacing: 0.04em;
}

.brand--invert { color: var(--paper); }
.brand--invert .brand-mark path { stroke: var(--paper); }

/* ===== Header ===== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.85rem;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: inline-block;
  padding: 0.45rem 0.85rem;
  border: 3px solid transparent;
  font-weight: 700;
  text-decoration: none;
  color: var(--black);
}

.nav-link--cta {
  border: var(--border);
  background: var(--yellow);
  box-shadow: 3px 3px 0 var(--black);
}

@media (hover: hover) and (pointer: fine) {
  .nav-link:hover {
    border: var(--border);
    background: var(--white);
    box-shadow: 3px 3px 0 var(--black);
  }

  .nav-link--cta:hover {
    background: var(--yellow);
    translate: -1px -1px;
    box-shadow: 5px 5px 0 var(--black);
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ===== Language toggle ===== */

.lang-toggle {
  display: flex;
  border: var(--border);
  background: var(--white);
  box-shadow: 3px 3px 0 var(--black);
}

.lang-btn {
  appearance: none;
  border: none;
  background: var(--white);
  padding: 0.4rem 0.7rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--black);
  cursor: pointer;
}

.lang-btn + .lang-btn { border-left: var(--border); }

.lang-btn[aria-pressed="true"] {
  background: var(--black);
  color: var(--yellow);
}

@media (hover: hover) and (pointer: fine) {
  .lang-btn:not([aria-pressed="true"]):hover { background: var(--paper); }
}

/* ===== Burger (mobile) ===== */

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 9px;
  border: var(--border);
  background: var(--white);
  box-shadow: 3px 3px 0 var(--black);
  cursor: pointer;
}

.nav-burger span {
  display: block;
  height: 3px;
  background: var(--black);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ===== Buttons ===== */

.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  border: var(--border);
  background: var(--white);
  box-shadow: var(--shadow);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  color: var(--black);
  text-decoration: none;
  cursor: pointer;
  transition: translate 0.12s ease, box-shadow 0.12s ease;
}

@media (hover: hover) and (pointer: fine) {
  .btn:hover {
    translate: -3px -3px;
    box-shadow: var(--shadow-hover);
  }
}

.btn:active {
  translate: 2px 2px;
  box-shadow: 2px 2px 0 var(--black);
}

.btn--primary { background: var(--yellow); }

.btn--big {
  font-size: 1.3rem;
  padding: 1rem 2rem;
  word-break: break-all;
}

/* ===== Hero ===== */

.hero {
  overflow: hidden;
  border-bottom: var(--border);
  background:
    radial-gradient(var(--black) 1.5px, transparent 1.5px) 0 0 / 28px 28px,
    var(--paper);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 2rem;
  padding-block: 5rem;
}

.kicker {
  display: inline-block;
  margin: 0 0 1.2rem;
  padding: 0.35rem 0.8rem;
  border: var(--border);
  background: var(--white);
  box-shadow: 3px 3px 0 var(--black);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-title {
  margin: 0 0 1.2rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.05;
  text-transform: uppercase;
}

.hero-sub {
  margin: 0 0 2rem;
  max-width: 34rem;
  font-size: 1.15rem;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-art {
  display: flex;
  justify-content: center;
}

.hero-mark {
  width: min(340px, 80%);
  aspect-ratio: 1;
  animation: bob 4s ease-in-out infinite;
}

.hero-mark path {
  fill: var(--yellow);
  stroke: var(--black);
  stroke-width: 11;
  stroke-linejoin: miter;
  stroke-miterlimit: 6;
}

@keyframes bob {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-14px) rotate(2deg); }
}

/* ===== Marquee ===== */

.marquee {
  position: relative;
  overflow: hidden;
  border-bottom: var(--border);
  background: var(--yellow);
  padding-block: 0.7rem;
}

.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 22s linear infinite;
}

.marquee-track span {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

/* WCAG 2.2.2: user-invocable pause for the auto-scrolling band */
.marquee-toggle {
  position: absolute;
  top: 50%;
  right: 0.6rem;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: var(--border);
  background: var(--paper);
  font-size: 0.6rem;
  line-height: 1;
  color: var(--black);
  cursor: pointer;
}

.marquee-toggle .icon-play { display: none; }

html.anim-paused .marquee-toggle .icon-play { display: block; }
html.anim-paused .marquee-toggle .icon-pause { display: none; }

html.anim-paused .marquee-track,
html.anim-paused .hero-mark {
  animation-play-state: paused;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== Sections ===== */

.section { padding-block: 5rem; }

.section--tint {
  background: var(--white);
  border-top: var(--border);
  border-bottom: var(--border);
}

.section--dark {
  background: var(--black);
  color: var(--paper);
  border-bottom: var(--border);
}

.section-label {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.3rem 0.75rem;
  border: var(--border);
  background: var(--yellow);
  box-shadow: 3px 3px 0 var(--black);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.section-label--invert {
  box-shadow: 3px 3px 0 var(--paper);
}

.section-title {
  margin: 0 0 2.5rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.15;
  text-transform: uppercase;
}

.section-title--invert { color: var(--yellow); }

/* ===== About ===== */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.about-p {
  margin: 0;
  font-size: 1.1rem;
}

/* ===== Services cards ===== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 1.6rem;
  border: var(--border);
  background: var(--paper);
  box-shadow: var(--shadow);
  transition: translate 0.12s ease, box-shadow 0.12s ease;
}

@media (hover: hover) and (pointer: fine) {
  .card:hover {
    translate: -3px -3px;
    box-shadow: var(--shadow-hover);
  }
}

.card-icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: var(--border);
  background: var(--yellow);
  box-shadow: 3px 3px 0 var(--black);
}

.card-icon svg {
  width: 32px;
  height: 32px;
}

.card-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.15rem;
  text-transform: uppercase;
}

.card-desc {
  margin: 0;
  font-size: 0.98rem;
}

/* ===== Products ===== */

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.product {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 2rem;
  border: var(--border);
  background: var(--white);
  box-shadow: var(--shadow);
}

.product-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.product-name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.6rem;
  text-transform: uppercase;
}

.product-tag {
  padding: 0.25rem 0.6rem;
  border: var(--border);
  background: var(--yellow);
  box-shadow: 2px 2px 0 var(--black);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.product-desc {
  margin: 0;
  flex-grow: 1;
}

.product-link {
  align-self: flex-start;
}

/* ===== Principles ===== */

.principle-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.principle {
  padding: 1.6rem;
  border: 3px solid var(--paper);
  box-shadow: 6px 6px 0 var(--yellow);
  background: var(--black);
}

.principle-num {
  display: block;
  margin-bottom: 0.6rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--paper);
  opacity: 0.55;
}

.principle-title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.3rem;
  text-transform: uppercase;
  color: var(--yellow);
}

.principle-desc {
  margin: 0;
  font-size: 0.98rem;
  color: var(--paper);
}

/* Korean headings: Archivo Black has no Hangul — use Plex KR 700 outright
   so Latin fragments inside KO headings don't get a synthesized faux bold */
html[lang="ko"] .hero-title,
html[lang="ko"] .section-title,
html[lang="ko"] .card-title,
html[lang="ko"] .principle-title {
  font-family: "IBM Plex Sans KR", system-ui, sans-serif;
  font-weight: 700;
}

/* ===== Contact ===== */

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 2.5rem;
  border: var(--border);
  background: var(--white);
  box-shadow: var(--shadow);
}

.contact-sub {
  margin: 0;
  font-size: 1.15rem;
  max-width: 36rem;
}

.contact-note {
  margin: 0;
  font-weight: 500;
  opacity: 0.75;
}

/* ===== Footer ===== */

.site-footer {
  background: var(--black);
  color: var(--paper);
  padding-block: 2.5rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 2rem;
}

.footer-tagline {
  margin: 0;
  font-weight: 700;
  color: var(--yellow);
}

.footer-rights {
  margin: 0;
  margin-left: auto;
  font-size: 0.9rem;
  opacity: 0.7;
}

/* ===== Reveal on scroll =====
   Hidden state is gated on the .js class (added by main.js) so content
   stays visible when JS is blocked or fails to load */

.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ===== Responsive ===== */

@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  html { scroll-padding-top: 80px; }

  .nav-burger { display: flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: var(--border);
  }

  .site-nav.is-open { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
    padding: 1rem 1.5rem 1.4rem;
  }

  .nav-link {
    display: block;
    text-align: center;
    border: var(--border);
    background: var(--white);
    box-shadow: 3px 3px 0 var(--black);
  }

  .hero-inner {
    grid-template-columns: 1fr;
    padding-block: 3.5rem;
    text-align: left;
  }

  .hero-art { order: -1; }

  .hero-mark { width: min(220px, 60%); }

  .about-grid { grid-template-columns: 1fr; }

  .card-grid { grid-template-columns: 1fr; }

  .product-grid { grid-template-columns: 1fr; }

  .principle-grid { grid-template-columns: 1fr; }

  .section { padding-block: 3.5rem; }

  .contact-card { padding: 1.6rem; }

  .footer-rights { margin-left: 0; }
}

@media (max-width: 360px) {
  .header-inner { gap: 0.5rem; }
  .header-actions { gap: 0.4rem; }
  .brand-name { font-size: 1.2rem; }
  .lang-btn { padding: 0.4rem 0.5rem; }
}

/* ===== Reduced motion ===== */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .hero-mark { animation: none; }

  .marquee-track { animation: none; }

  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn, .card, .nav-link--cta { transition: none; }
}