/**
 * Reusable components: buttons, nav, dropdown, footer, cards, etc.
 */

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 24px;
  border-radius: 10px;
  font-family: var(--font-family);
  font-size: var(--fs-body-1);
  font-weight: var(--fw-medium);
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  white-space: nowrap;
  color: inherit;
}

.btn--primary {
  background-color: var(--interactive-accent-blue);
  color: var(--tx-white);
}
.btn--primary:hover {
  background-color: #0066E0;
}

.btn--ghost {
  background-color: transparent;
  color: var(--tx-white);
  border-color: var(--border-light);
}
.btn--ghost:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.btn--sm {
  padding: 10px 18px;
  font-size: var(--fs-body-2);
  border-radius: 8px;
}

/* ============ Logo (image; text fallback if image missing) ============ */
.logo-img {
  display: block;
  height: 32px;
  width: auto;
  max-width: 196px;
}

/* GNB(header) only — 1.5x of base */
.site-header__logo .logo-img {
  height: 48px;
  max-width: 294px;
}

/* Text fallback (only shown if image fails to load) */
.logo-text {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 28px;
  letter-spacing: -0.02em;
  color: var(--interactive-primary);
}
.logo-text--inverse {
  color: var(--tx-white);
}

@media (max-width: 640px) {
  .logo-img { height: 28px; }
  .site-header__logo .logo-img { height: 42px; }
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-primary);
  border-bottom: 1px solid transparent;
  transition: transform 0.35s ease;
}
/* Auto-hide on scroll down, reveal on scroll up */
.site-header--hidden {
  transform: translateY(-100%);
}

.site-header__inner {
  max-width: 1820px;
  margin-inline: auto;
  padding: 32px 50px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}

.site-header__logo {
  display: inline-flex;
  align-items: center;
}

.site-nav__list {
  display: flex;
  gap: 32px;
  align-items: center;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  background: none;
  border: 0;
  padding: 8px 4px;
  font-family: var(--font-family);
  font-size: 20px;
  font-weight: var(--fw-medium);
  color: var(--tx-primary);
  cursor: pointer;
  transition: color 0.15s ease;
  line-height: 1.2;
}
.site-nav__link:hover {
  color: var(--interactive-primary);
}
.site-nav__link.is-active,
.site-nav__link.is-active:hover {
  color: var(--interactive-accent-blue);
}

.site-header__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
}

/* ============ Mobile hamburger toggle ============ */
.site-header__toggle {
  display: none;            /* shown only on mobile */
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: 0;
  cursor: pointer;
  justify-self: end;
  z-index: 110;             /* above the drawer */
}
.site-header__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--tx-primary);
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============ Mobile menu drawer ============ */
.mobile-menu {
  display: none;            /* enabled only on mobile */
}

/* ============ Products dropdown ============ */
.dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 217px;
  background: var(--bg-primary);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
  padding: 0;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0s linear 0.18s;
  z-index: 200;
}

.site-nav__item--has-dropdown:hover .dropdown,
.site-nav__item--has-dropdown:focus-within .dropdown,
.dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0s linear 0s;
}

.dropdown__item {
  display: block;
  padding: 12px;
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: var(--fw-medium);
  color: var(--tx-primary);
  transition: background-color 0.12s ease;
}
.dropdown__item:hover {
  background-color: var(--bg-accent);
}
.dropdown__item.is-active,
.dropdown__item.is-active:hover {
  color: var(--interactive-accent-blue);
}

/* ============ Language switch (dropdown) ============ */
.lang-switch {
  position: relative;
  display: inline-block;
}
.lang-switch__trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 0;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--tx-primary);
  cursor: pointer;
  transition: background-color 0.15s ease;
  font-family: var(--font-family);
  font-size: var(--fs-caption-1);
  font-weight: var(--fw-medium);
}
.lang-switch__trigger:hover {
  background-color: var(--gray-100);
}
.lang-switch__icon,
.lang-switch__chevron {
  display: block;
}
.lang-switch__chevron {
  transition: transform 0.18s ease;
  opacity: 0.7;
}
.lang-switch__trigger[aria-expanded="true"] .lang-switch__chevron {
  transform: rotate(180deg);
}

.lang-switch__menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 140px;
  background: var(--bg-primary);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
  list-style: none;
  margin: 0;
  padding: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0s linear 0.18s;
  z-index: 200;
}
.lang-switch.is-open .lang-switch__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0s linear 0s;
}
.lang-switch__option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: 0;
  padding: 10px 12px;
  border-radius: 6px;
  font-family: var(--font-family);
  font-size: var(--fs-caption-1);
  font-weight: var(--fw-medium);
  color: var(--tx-primary);
  text-align: left;
  cursor: pointer;
  transition: background-color 0.12s ease, color 0.12s ease;
}
.lang-switch__option:hover {
  background-color: var(--bg-accent);
}
.lang-switch__option[aria-selected="true"] {
  color: var(--brand-primary, #0066ff);
  font-weight: var(--fw-semibold);
}
.lang-switch__option[aria-selected="true"]::after {
  content: "";
  width: 14px;
  height: 14px;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center/contain no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center/contain no-repeat;
}

/* ============ Header responsive ============ */
@media (max-width: 1024px) {
  .site-header__inner {
    padding: 20px 24px;
  }
  .site-nav__list {
    gap: 24px;
  }
  .site-header__actions {
    gap: 12px;
  }
}

@media (max-width: 640px) {
  .site-header__inner {
    grid-template-columns: auto auto;
    justify-content: space-between;
    padding: 16px;
  }
  .site-nav { display: none; }
  .site-header__actions { display: none; }
  .site-header__toggle { display: inline-flex; }
  .site-header__logo { position: relative; z-index: 110; }  /* stay above the drawer */

  /* Drawer: full-screen panel below the header bar */
  .mobile-menu {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 32px;
    position: fixed;
    inset: 0;
    z-index: 95;            /* under the toggle (110), over the page */
    background: var(--bg-primary);
    padding: 88px 24px 40px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0s linear 0.3s;
    overflow-y: auto;
  }
  .mobile-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0s linear 0s;
  }

  .mobile-menu__nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  .mobile-menu__heading {
    font-family: var(--font-family);
    font-size: var(--fs-caption-1);
    font-weight: var(--fw-semibold);
    color: var(--tx-muted, #999);
    padding: 12px 8px 4px;
  }
  .mobile-menu__link {
    display: block;
    padding: 14px 8px;
    font-family: var(--font-family);
    font-size: var(--fs-h4);
    font-weight: var(--fw-medium);
    color: var(--tx-primary);
    border-bottom: 1px solid var(--gray-100);
  }
  .mobile-menu__link--standalone {
    margin-top: 12px;
  }
  .mobile-menu__link.is-active {
    color: var(--interactive-accent-blue);
  }
  .mobile-menu__footer {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .mobile-menu__footer .btn {
    width: 100%;
    justify-content: center;
  }
  .mobile-menu__footer .lang-switch {
    align-self: flex-start;
  }
  .mobile-menu__footer .lang-switch__menu {
    right: auto;
    left: 0;
  }

  /* Lock page scroll when the drawer is open */
  body.menu-open { overflow: hidden; }
}

/* ============ Footer ============ */
.site-footer {
  background-color: var(--interactive-primary);
  color: var(--tx-white);
}

.site-footer__inner {
  max-width: 1820px;
  margin-inline: auto;
  padding: 60px 160px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.site-footer__logo {
  display: inline-flex;
}

.site-footer__columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.site-footer__company {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: var(--fs-body-2);
  font-weight: var(--fw-regular);
  color: var(--tx-white);
  opacity: 0.9;
}
.site-footer__company li {
  position: relative;
  padding-right: 16px;
}
.site-footer__company li:not(:last-child)::after {
  content: '|';
  position: absolute;
  right: 0;
  top: 0;
  opacity: 0.5;
}

.site-footer__terms {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  font-size: var(--fs-body-2);
  font-weight: var(--fw-semibold);
  margin-top: 8px;
}
.site-footer__terms a {
  color: var(--tx-white);
  transition: opacity 0.15s ease;
}
.site-footer__terms a:hover {
  opacity: 0.75;
}

.site-footer__copyright {
  font-size: var(--fs-body-2);
  font-weight: var(--fw-medium);
  color: var(--tx-white);
  opacity: 0.8;
  margin-top: 24px;
}

@media (max-width: 1024px) {
  .site-footer__inner {
    padding: 48px 24px;
  }
  .site-footer__company li {
    padding-right: 12px;
  }
}

/* ============ Solution card (Section 2) ============ */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 1024px) {
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .solution-grid { grid-template-columns: 1fr; }
}

.solution-card {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: 24px;
  overflow: hidden;
  cursor: pointer;
}

.solution-card__image {
  position: absolute;
  inset: 0;
  background-color: var(--gray-400, #999);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: transform 0.4s ease;
}
.solution-card:hover .solution-card__image {
  transform: scale(1.04);
}

/* Dark gradient at top for readable title */
.solution-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.45) 0%, rgba(0, 0, 0, 0.1) 40%, transparent 70%);
  z-index: 1;
  pointer-events: none;
}

.solution-card__title {
  position: absolute;
  top: 24px;
  left: 24px;
  right: 24px;
  z-index: 2;
  color: var(--tx-white);
  font-size: var(--fs-h4);
  font-weight: var(--fw-bold);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

/* Mobile: cards become landscape (matches Figma 328×160) — placed after the
   base rules so the override actually wins. */
@media (max-width: 640px) {
  .solution-card { aspect-ratio: 328 / 160; border-radius: 16px; }
  .solution-card__title { top: 20px; left: 20px; right: 20px; font-size: var(--fs-h5); }
}