/* style.css — Yobi Company design tokens + components */

:root,
[data-theme='light'] {
  /* Warm paper surfaces */
  --color-bg: #f5f2ec;
  --color-surface: #faf8f3;
  --color-surface-2: #fffdf8;
  --color-surface-offset: #efebe3;
  --color-divider: #e6e1d7;
  --color-border: #ddd7cb;

  /* Ink text */
  --color-text: #1a1815;
  --color-text-muted: #6b665e;
  --color-text-faint: #a8a299;
  --color-text-inverse: #faf8f3;

  /* Signal accent — ember orange */
  --color-accent: #d94e1c;
  --color-accent-hover: #b23d12;
  --color-accent-soft: rgba(217, 78, 28, 0.10);
  --color-accent-contrast: #ffffff;

  --shadow-sm: 0 1px 2px rgba(26, 24, 21, 0.06);
  --shadow-md: 0 6px 20px rgba(26, 24, 21, 0.08);
  --shadow-lg: 0 18px 48px rgba(26, 24, 21, 0.14);
}

[data-theme='dark'] {
  --color-bg: #13110e;
  --color-surface: #1b1814;
  --color-surface-2: #211d18;
  --color-surface-offset: #1d1a16;
  --color-divider: #2a2620;
  --color-border: #322e27;

  --color-text: #ece8df;
  --color-text-muted: #9a958b;
  --color-text-faint: #615d54;
  --color-text-inverse: #13110e;

  --color-accent: #ff6b3d;
  --color-accent-hover: #ff8559;
  --color-accent-soft: rgba(255, 107, 61, 0.14);
  --color-accent-contrast: #13110e;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.55);
}

/* Type scale */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 7rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 1080px;
  --content-wide: 1240px;

  --font-body: 'Pretendard Variable', 'Pretendard', system-ui, sans-serif;
  --font-display: 'Instrument Serif', 'Pretendard Variable', Georgia, serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #13110e;
    --color-surface: #1b1814;
    --color-surface-2: #211d18;
    --color-surface-offset: #1d1a16;
    --color-divider: #2a2620;
    --color-border: #322e27;
    --color-text: #ece8df;
    --color-text-muted: #9a958b;
    --color-text-faint: #615d54;
    --color-text-inverse: #13110e;
    --color-accent: #ff6b3d;
    --color-accent-hover: #ff8559;
    --color-accent-soft: rgba(255, 107, 61, 0.14);
    --color-accent-contrast: #13110e;
  }
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container--wide {
  max-width: var(--content-wide);
}
.section {
  padding-block: clamp(var(--space-12), 7vw, var(--space-24));
}
.eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.eyebrow::before {
  content: '';
  width: 1.75rem;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.6;
}
.section-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-top: var(--space-3);
}
.section-lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  max-width: 56ch;
}

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-interactive);
}
.header--scrolled {
  box-shadow: var(--shadow-sm);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  text-decoration: none;
}
.brand__mark {
  height: 1.9rem;
  width: auto;
  display: block;
}
.brand__name-sub {
  color: var(--color-text-muted);
  font-weight: 500;
}
.brand__name {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
}
.nav__links a:hover {
  color: var(--color-text);
}
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.theme-toggle {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-text-faint);
}
.nav-toggle {
  display: none;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  align-items: center;
  justify-content: center;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.25rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
}
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover {
  border-color: var(--color-text-faint);
  background: var(--color-surface-offset);
}
.btn .arrow {
  transition: transform var(--transition-interactive);
}
.btn:hover .arrow {
  transform: translateX(3px);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: clamp(560px, 88vh, 820px);
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
}
.hero__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    var(--color-bg) 0%,
    color-mix(in oklab, var(--color-bg) 72%, transparent) 38%,
    color-mix(in oklab, var(--color-bg) 12%, transparent) 70%,
    transparent 100%
  );
}
[data-theme='dark'] .hero__media::after,
:root:not([data-theme]) .hero__media::after {
  background: linear-gradient(
    90deg,
    var(--color-bg) 0%,
    color-mix(in oklab, var(--color-bg) 74%, transparent) 40%,
    color-mix(in oklab, var(--color-bg) 14%, transparent) 72%,
    transparent 100%
  );
}
.hero__content {
  position: relative;
  z-index: 1;
  max-width: 42rem;
  padding-block: var(--space-20);
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 1.2rem + 4vw, 4rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-top: var(--space-5);
}
.hero__title em {
  font-style: italic;
  color: var(--color-accent);
}
.hero__sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-top: var(--space-6);
  max-width: 38ch;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}
.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  max-width: 36rem;
}
.hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero__meta-num {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.hero__meta-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---------- Marquee strip ---------- */
.strip {
  border-block: 1px solid var(--color-divider);
  background: var(--color-surface);
  overflow: hidden;
  padding-block: var(--space-6);
}
.strip__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  text-align: center;
}
.strip__text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
}
.strip__dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
}

/* ---------- About ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  margin-top: var(--space-12);
}
@media (min-width: 880px) {
  .about__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-16);
    align-items: start;
  }
}
.about__body p {
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-top: var(--space-5);
}
.about__body p + p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
}
.about__pull {
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-6);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  line-height: 1.2;
  color: var(--color-text);
}

/* ---------- Brands ---------- */
.brands__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-12);
}
@media (min-width: 860px) {
  .brands__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
.brand-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  overflow: hidden;
  text-decoration: none;
  color: var(--color-text);
  min-height: 22rem;
}
.brand-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    120% 80% at 100% 0%,
    var(--color-accent-soft),
    transparent 60%
  );
  opacity: 0;
  transition: opacity var(--transition-interactive);
}
.brand-card:hover {
  border-color: color-mix(in oklab, var(--color-accent) 45%, var(--color-border));
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.brand-card:hover::before {
  opacity: 1;
}
.brand-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  position: relative;
  z-index: 1;
}
.brand-card__mark {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  object-fit: cover;
  display: block;
}
.badge {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
}
.badge--soon {
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
}
.badge--soon::before {
  background: var(--color-text-faint);
}
.brand-card__name {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-top: var(--space-5);
  position: relative;
  z-index: 1;
}
.brand-card__name .en {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--color-text-muted);
  margin-left: var(--space-2);
}
.brand-card__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  position: relative;
  z-index: 1;
}
.brand-card__social {
  display: flex;
  gap: 0.25rem;
  margin-top: var(--space-4);
  position: relative;
  z-index: 1;
}
.brand-card__social a {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  color: var(--color-text-faint);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.brand-card__social a:hover {
  color: var(--color-accent);
  background: var(--color-surface-offset);
}
.brand-card__social svg {
  width: 1.05rem;
  height: 1.05rem;
}
.brand-card__foot {
  margin-top: auto;
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
  position: relative;
  z-index: 1;
}
.brand-card__cta {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
}

/* Korean line-breaking: keep words together */
body {
  word-break: keep-all;
  overflow-wrap: break-word;
}

/* ---------- Principles ---------- */
.principles__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: var(--space-12);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-border);
}
@media (min-width: 720px) {
  .principles__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1080px) {
  .principles__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.principle {
  background: var(--color-surface);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.principle__num {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}
.principle__title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.principle__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ---------- Contact ---------- */
.contact {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
}
.contact__card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-10), 6vw, var(--space-16));
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.contact__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  line-height: 1.1;
  max-width: 18ch;
}
.contact__sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  max-width: 48ch;
}
.contact__email {
  margin-top: var(--space-8);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  padding: var(--space-3) var(--space-6);
  border: 1px solid color-mix(in oklab, var(--color-accent) 40%, var(--color-border));
  border-radius: var(--radius-full);
}
.contact__email:hover {
  background: var(--color-accent-soft);
}
.contact__social-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-faint);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}
.contact__social {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
}
.contact__social a {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.contact__social a:hover {
  color: var(--color-accent);
  border-color: color-mix(in oklab, var(--color-accent) 45%, var(--color-border));
  background: var(--color-accent-soft);
}
.contact__social svg {
  width: 1.15rem;
  height: 1.15rem;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
}
.footer__top {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  justify-content: space-between;
  align-items: flex-start;
}
.footer__brand {
  max-width: 28ch;
}
.footer__brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
}
.footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-12);
}
.footer__col h4 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  font-weight: 600;
}
.footer__col ul {
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer__col a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer__col a:hover {
  color: var(--color-text);
}
.footer__bottom {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
  align-items: center;
}
.footer__bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer__domain {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

/* ---------- Mobile nav ---------- */
@media (max-width: 760px) {
  .nav__links,
  .header__actions .btn {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .nav--open .nav__links {
    display: flex;
    position: absolute;
    top: 4.25rem;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }
  .nav--open .nav__links a {
    font-size: var(--text-base);
  }
}

/* ---------- Mobile hero readability ---------- */
@media (max-width: 640px) {
  .hero__media::after {
    background:
      linear-gradient(0deg, var(--color-bg) 0%, color-mix(in oklab, var(--color-bg) 92%, transparent) 18%, transparent 38%),
      linear-gradient(90deg, var(--color-bg) 0%, color-mix(in oklab, var(--color-bg) 88%, transparent) 50%, color-mix(in oklab, var(--color-bg) 30%, transparent) 80%, transparent 100%);
  }
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}