/* ========== BASIC RESET ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

:root {
  --header-height: 72px;
  --color-1: #151515; /* shared header/footer color */
  --color-2: #f5f5f5;   /* shared light text color */
  --color-2-soft: rgba(245, 245, 245, 0.7);
  --color-3: #6b6b6b;   /* muted dark gray for secondary footer text */
  --color-ink: #222222;  /* primary text on light backgrounds */
  --fw-regular: 400;
  --fw-semi: 500;
  --fw-bold: 600;
  --fs-body: 1rem;
  --fs-brand: 1.1rem;
  --fs-main-nav: 0.9rem;
  --fs-drawer-nav: 1.15rem;
  --fs-footer: 0.75rem;
  --fs-footer-sm: 0.7rem;
}

body {
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI",
    system-ui, sans-serif;
  font-size: var(--fs-body);
  background: #050508;
  color: var(--color-2);
  min-height: 100%;
}

/* ========== HEADER ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  padding: 0.75rem 1.5rem;
  z-index: 20;
  background: var(--color-1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-title {
  color: var(--color-2);
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--fs-brand);
}

.brand-link {
  color: inherit;
  text-decoration: none;
}

.main-nav {
  display: none;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  letter-spacing: 0.08em;
}

.main-nav a {
  color: var(--color-2);
  text-decoration: none;
  font-size: var(--fs-main-nav);
  font-weight: var(--fw-semi);
  text-transform: uppercase;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  border-bottom-color: var(--color-2-soft);
}

/* Hamburger button */
.hamburger-btn {
  border: none;
  background: transparent;
  width: 3rem;
  height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.hamburger-icon {
  position: relative;
  width: 1.5rem;
  height: 2px;
  background: var(--color-2);
}

.hamburger-icon::before,
.hamburger-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-2);
}

.hamburger-icon::before {
  top: -6px;
}

.hamburger-icon::after {
  top: 6px;
}

.nav-open .hamburger-icon {
  background: transparent;
}

.nav-open .hamburger-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-open .hamburger-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  background: var(--color-1);
  color: var(--color-2);
  transform: translateX(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.35s ease, opacity 0.25s ease;
  z-index: 30;
  padding: 3rem 2rem 2rem 3rem; /* tighter left inset for nav text */
  display: none;
  align-items: flex-start;
  justify-content: left;
  overflow-y: auto;
}

.nav-open .nav-drawer {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
  width: calc(100% - 64px); /* leave right-side breathing room when open */
}

.nav-drawer ul {
  list-style: none;
  display: grid;
  gap: 1.75rem;
  width: min(320px, 100%);
}

.nav-drawer a {
  color: var(--color-2);
  text-decoration: none;
  font-size: var(--fs-drawer-nav);
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

body.nav-open {
  overflow: hidden;
}

/* ========== HERO / SLIDESHOW ========== */
.hero {
  position: relative;
  width: 100%;
  height: calc(100vh - var(--header-height));
  margin-top: var(--header-height);
  overflow: hidden;
}

.slideshow {
  position: relative;
  width: 100%;
  height: 100%;
}

/* Each slide fills the screen */
.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;       /* Crop nicely */
  object-position: center; /* Adjust framing if needed */
  display: block;
}

/* The visible slide */
.slide.active {
  opacity: 1;
}

/* ========== FOOTER ========== */
.site-footer {
  background: var(--color-1);
  color: var(--color-2);
  font-size: var(--fs-footer);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  line-height: 1.8;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  min-height: 220px;
  padding-top: 10rem;
  padding-bottom: 5rem;
}

.footer-name {
  font-weight: var(--fw-bold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.2rem;
}

.footer-icons {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 0.25rem;
}

.icon-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-2);
  transition: transform 0.15s ease, opacity 0.15s ease;
  margin-bottom: 0.2rem;
}

.icon-btn svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.icon-btn:hover,
.icon-btn:focus-visible {
  transform: translateY(-1px);
  opacity: 0.85;
}

.footer-info {
  margin-top: 4rem;
  color: var(--color-3);
}

.footer-nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin: 1.5rem 0 1.25rem;
  letter-spacing: 0.08em;
}

.footer-nav a {
  color: var(--color-2);
  text-decoration: none;
  text-transform: uppercase;
  font-weight: var(--fw-semi);
}

/* ========== PAGE LAYOUTS ========== */
.page {
  background: var(--color-2);
  color: var(--color-ink);
  min-height: 100vh;
}

.page-content {
  max-width: 960px;
  margin: 0 auto;
  padding: calc(var(--header-height) + 5rem) 3rem 20rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  line-height: 1.6;
  color: var(--color-ink);
}

.page-title {
  font-size: 1.8rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink);
}

.page-subtitle {
  font-size: 1rem;
  color: var(--color-3);
}

.chronology-list {
  border-left: 1px solid rgba(0, 0, 0, 0.08);
  padding-left: 1.5rem;
  display: grid;
  gap: 1.5rem;
  color: var(--color-ink);
}

.chrono-item {
  position: relative;
  padding-left: 0.5rem;
}

.chrono-item::before {
  content: "";
  position: absolute;
  left: -1.75rem;
  top: 0.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-1);
}

.chrono-year {
  font-weight: var(--fw-bold);
  letter-spacing: 0.04em;
}

.chrono-detail {
  color: var(--color-3);
}

.card-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 1.25rem;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.02);
  color: var(--color-ink);
}

.card h3 {
  font-weight: var(--fw-bold);
  margin-bottom: 0.4rem;
}

.card p {
  color: var(--color-3);
}

.contact-list {
  display: grid;
  gap: 0.75rem;
  color: var(--color-3);
  text-align: center;
  margin-top: 10rem;
  margin-bottom: 10rem;
}

.contact-list a {
  color: var(--color-1);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.contact-list a:hover,
.contact-list a:focus-visible {
  border-bottom-color: var(--color-1);
}

.page-hero {
  text-align: center;
  display: grid;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.page-divider {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: center;
  color: var(--color-3);
}

.page-divider::before,
.page-divider::after {
  content: "";
  display: block;
  width: 80px;
  height: 1px;
  background: rgba(0, 0, 0, 0.12);
}

.page-meta {
  color: var(--color-3);
  font-size: 0.95rem;
}

.page-body {
  display: grid;
  gap: 1.25rem;
  color: var(--color-ink);
}

.feature-image {
  margin: 1rem 0 0.5rem;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.feature-image figcaption {
  color: var(--color-3);
  font-size: 0.9rem;
  margin-top: 0.35rem;
  text-align: center;
}

.info-section {
  display: grid;
  gap: 1rem;
}

.info-heading {
  font-weight: var(--fw-bold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 1rem;
  color: var(--color-ink);
}

.info-grid {
  display: grid;
  gap: 0.75rem;
}

.info-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0.75rem;
  align-items: start;
}

.info-row dt {
  color: var(--color-3);
  font-weight: var(--fw-semi);
}

.info-row dd {
  margin: 0;
  color: var(--color-ink);
}

@media (min-width: 901px) {
  .nav-open .main-nav {
    display: block;
  }
}

/* ========== RESPONSIVE TWEAKS ========== */
@media (max-width: 900px) {
  :root {
    --header-height: 64px;
  }

  .site-header {
    padding: 0.5rem 1rem;
  }

  .main-nav {
    display: none;
  }

  .nav-drawer {
    display: flex;
  }

  .footer-inner {
    
    font-size: var(--fs-footer-sm);
  }

  .hamburger-btn {
    width: 2.5rem;
    height: 2.5rem;
  }

  .footer-nav ul {
    flex-direction: column;
    gap: 0.75rem;
  }

  .page-content {
    padding: calc(var(--header-height) + 5rem) 1.25rem 15rem;
  }
}