:root {
  --ink: #070b12;
  --panel: #0d1520;
  --panel-2: #111b28;
  --line: #243044;
  --mist: #8b9cb3;
  --snow: #e8eef6;
  --signal: #5b8def;
  --signal-soft: #8fb4ff;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  overflow-x: hidden;
}

body {
  font-feature-settings: "ss01" on, "cv01" on;
  overflow-x: hidden;
  overflow-wrap: break-word;
  word-break: keep-all;
}

::selection {
  background: rgba(91, 141, 239, 0.28);
  color: var(--snow);
}

.bg-grid {
  background-image:
    linear-gradient(to right, rgba(36, 48, 68, 0.35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 48, 68, 0.35) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 75%);
}

.bg-glow {
  background:
    radial-gradient(ellipse 60% 40% at 15% 10%, rgba(91, 141, 239, 0.14), transparent 55%),
    radial-gradient(ellipse 40% 30% at 90% 0%, rgba(56, 189, 248, 0.08), transparent 50%);
}

.nav-blur {
  backdrop-filter: saturate(140%) blur(16px);
  background: rgba(7, 11, 18, 0.78);
}

.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  background: rgba(17, 27, 40, 0.85);
  color: #c5d4e8;
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  font-size: 0.72rem;
  letter-spacing: 0.01em;
  line-height: 1.4;
}

.case-card {
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(17, 27, 40, 0.92), rgba(13, 21, 32, 0.96));
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}

.arch-slot {
  position: relative;
  overflow: hidden;
  border: 1px dashed #31425c;
  background:
    linear-gradient(180deg, rgba(17, 27, 40, 0.7), rgba(10, 16, 24, 0.9));
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.arch-slot:hover,
.arch-slot:focus-visible {
  border-color: var(--signal);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(91, 141, 239, 0.12);
  outline: none;
}

.arch-slot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.arch-slot::after {
  content: "클릭하여 확대";
  position: absolute;
  right: 0.9rem;
  bottom: 0.9rem;
  z-index: 1;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(7, 11, 18, 0.82);
  color: var(--mist);
  padding: 0.28rem 0.65rem;
  font-size: 0.68rem;
  letter-spacing: 0.02em;
}

#arch-modal {
  z-index: 90;
}

.adjacent-card {
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.adjacent-card:hover,
.adjacent-card:focus-visible {
  border-color: var(--signal);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(91, 141, 239, 0.1);
  outline: none;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: rgba(4, 8, 14, 0.82);
  backdrop-filter: blur(10px);
}

.modal-overlay.is-open {
  display: flex;
}

.modal-panel {
  width: min(1100px, 100%);
  max-height: calc(100vh - 2.5rem);
  overflow: auto;
  border: 1px solid var(--line);
  background: #0b121c;
  border-radius: 1rem;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

body.modal-open {
  overflow: hidden;
}

.accordion-panel {
  display: none;
}

.accordion-panel.is-open {
  display: block;
}

.icon-tile {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  border: 1px solid var(--line);
  background: rgba(91, 141, 239, 0.08);
  color: var(--signal-soft);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.hero-kicker {
  letter-spacing: 0.18em;
}

.link-underline {
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0 1px;
  transition: background-size 0.2s ease;
}

.link-underline:hover {
  background-size: 100% 1px;
}

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

  .arch-slot,
  .link-underline {
    transition: none;
  }
}

@media print {
  html,
  body {
    background: #070b12 !important;
    color: #e8eef6 !important;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  * {
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .arch-slot::after,
  #site-nav,
  .modal-overlay {
    display: none !important;
  }

  .accordion-panel {
    display: block !important;
  }

  .case-card,
  .arch-slot,
  .adjacent-card {
    break-inside: avoid;
  }

  a {
    color: #8fb4ff !important;
  }
}