:root {
  --orbit-background: #f1f5f9;
  --orbit-text: #475569;
  --orbit-heading: #17233b;
  --orbit-accent: #0ea5e9;
  --orbit-accent-dark: #0284c7;
  --orbit-surface: #ffffff;
  --orbit-border: #dbe4ee;
  --navy: #101c38;
  --shadow-sm: 0 8px 24px rgba(30, 41, 59, 0.07);
  --shadow-lg: 0 24px 64px rgba(30, 41, 59, 0.16);
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 82px; }
body {
  margin: 0;
  background: var(--orbit-background);
  color: var(--orbit-text);
  font-family: "Pretendard", "Roboto", "Noto Sans KR", system-ui, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body.modal-open { overflow: hidden; }
[data-render-mode="static"] [data-server-only] { display: none !important; }
button, a { font: inherit; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.section-kicker {
  color: var(--orbit-accent-dark);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .17em;
}
.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 0 22px;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 850;
  transition: transform .22s ease, box-shadow .22s ease, background .22s ease;
}
.button-primary { background: var(--orbit-accent); color: white; box-shadow: 0 12px 28px rgba(14,165,233,.22); }
.button-primary:hover { transform: translateY(-2px); background: var(--orbit-accent-dark); box-shadow: 0 17px 32px rgba(14,165,233,.3); }
.button-light { background: white; color: var(--orbit-heading); }
.button-light:hover { transform: translateY(-2px); box-shadow: 0 15px 34px rgba(0,0,0,.2); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 78px;
  padding: 0;
  background: rgba(255,255,255,.9);
  border-bottom: 1px solid rgba(219,228,238,.8);
  backdrop-filter: blur(18px);
}
.header-inner {
  width: min(calc(100% - 48px), 1280px);
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand-admin-group { display: flex; align-items: center; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--orbit-heading); font-weight: 800; letter-spacing: -.025em; }
.brand-mark {
  width: 40px;
  height: 40px;
  display: inline-grid;
  place-items: center;
  border-radius: 11px;
  background: var(--orbit-heading);
  color: white;
  font-size: 13px;
  letter-spacing: -.05em;
  box-shadow: inset 0 -4px 10px rgba(0,0,0,.18);
}
.brand-home .brand-mark { width: 80px; }
.admin-login-button { min-height: 36px; display: inline-flex; align-items: center; gap: 8px; padding: 0 12px; border: 1px solid var(--orbit-border); border-radius: 9px; background: #f8fafc; color: #64748b; cursor: pointer; font-size: 11px; font-weight: 800; transition: color .2s ease, border-color .2s ease, background .2s ease; }
.admin-login-button:hover,
.admin-login-button:focus-visible { border-color: var(--orbit-accent); background: #f0f9ff; color: var(--orbit-accent-dark); }
.key-icon { position: relative; width: 15px; height: 15px; display: inline-block; flex: 0 0 15px; }
.key-icon::before { content: ""; position: absolute; left: 0; top: 1px; width: 8px; height: 8px; border: 2px solid currentColor; border-radius: 50%; }
.key-icon::after { content: ""; position: absolute; left: 7px; top: 8px; width: 8px; height: 2px; background: currentColor; box-shadow: 4px 3px 0 -0.5px currentColor; transform: rotate(42deg); transform-origin: left center; }
.desktop-nav { display: flex; align-items: stretch; align-self: stretch; gap: 44px; }
.desktop-nav a {
  position: relative;
  display: flex;
  align-items: center;
  color: #667085;
  font-size: 14px;
  font-weight: 700;
  transition: color .2s ease;
}
.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--orbit-accent);
  transform: scaleX(0);
  transition: transform .2s ease;
}
.desktop-nav a:hover,
.desktop-nav a.active { color: var(--orbit-accent-dark); }
.desktop-nav a.active::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.campus-name {
  color: var(--orbit-heading);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: -.02em;
  white-space: nowrap;
}
/* Shared project artwork */
.artwork {
  --art-a: #0ea5e9;
  --art-b: #0f3d5a;
  position: relative;
  min-height: 230px;
  overflow: hidden;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at 17% 15%, rgba(255,255,255,.28), transparent 25%), linear-gradient(135deg, var(--art-a), var(--art-b));
}
.artwork::before,
.artwork::after {
  content: "";
  position: absolute;
  width: 160px;
  height: 160px;
  border: 1px solid rgba(255,255,255,.19);
  border-radius: 50%;
}
.artwork::before { left: -75px; bottom: -60px; }
.artwork::after { right: -45px; top: -75px; width: 210px; height: 210px; }
.artwork--sky { --art-a:#0ea5e9; --art-b:#1e3a5f; }
.artwork--violet { --art-a:#8b5cf6; --art-b:#312e81; }
.artwork--mint { --art-a:#16a38a; --art-b:#164e63; }
.artwork--coral { --art-a:#fb7185; --art-b:#7c2d4c; }
.artwork--navy { --art-a:#3b82f6; --art-b:#172554; }
.artwork--amber { --art-a:#f59e0b; --art-b:#78350f; }
.artwork--rose { --art-a:#f43f5e; --art-b:#581c87; }
.artwork--cyan { --art-a:#06b6d4; --art-b:#155e75; }
.mock-browser {
  position: relative;
  z-index: 1;
  width: 84%;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.42);
  border-radius: 12px;
  background: rgba(248,250,252,.95);
  box-shadow: 0 22px 50px rgba(15,23,42,.3);
  transform: perspective(800px) rotateX(2deg) rotateY(-3deg);
}
.artwork--v1 .mock-browser { transform: perspective(800px) rotateX(-1deg) rotateY(3deg) scale(1.03); }
.mock-topbar { height: 23px; display: flex; align-items: center; gap: 4px; padding: 0 8px; border-bottom: 1px solid #e6edf4; background: white; }
.mock-topbar span { width: 5px; height: 5px; border-radius: 50%; background: #cbd5e1; }
.mock-topbar b { margin-left: auto; color: var(--art-a); font-size: 6px; }
.mock-layout { height: 145px; display: flex; }
.mock-sidebar { width: 16%; display: flex; flex-direction: column; gap: 9px; padding: 15px 9px; background: #f0f4f8; }
.mock-sidebar i { height: 5px; border-radius: 5px; background: #cbd5e1; }
.mock-sidebar i:first-child { background: var(--art-a); }
.mock-content { flex: 1; padding: 14px; }
.mock-heading span { display: block; width: 35%; height: 7px; margin-bottom: 5px; border-radius: 4px; background: #334155; }
.mock-heading span:last-child { width: 58%; height: 4px; background: #dbe3ec; }
.mock-grid { margin-top: 13px; display: grid; grid-template-columns: 1.25fr .75fr; gap: 7px; }
.mock-main-card,
.mock-small-card,
.mock-line-card { min-height: 65px; padding: 10px; border: 1px solid #e2e8f0; border-radius: 7px; background: white; }
.mock-main-card { grid-row: span 2; color: var(--art-a); }
.mock-main-card strong { display: block; font-size: 16px; }
.mock-main-card span,
.mock-line-card span { display: block; width: 80%; height: 4px; margin-top: 8px; border-radius: 4px; background: #dbe3ec; }
.mock-main-card span:last-child { width: 55%; }
.mock-small-card { min-height: 31px; display: flex; align-items: end; gap: 3px; padding: 7px; }
.mock-small-card i { width: 14%; background: var(--art-a); opacity: .35; border-radius: 2px 2px 0 0; }
.mock-small-card i:nth-child(1) { height: 35%; }
.mock-small-card i:nth-child(2) { height: 75%; }
.mock-small-card i:nth-child(3) { height: 52%; }
.mock-line-card { min-height: 31px; padding: 7px; }
.mock-line-card span { height: 3px; margin-top: 3px; }

/* Shared project card */
.projects-grid {
  display: flex;
  flex-wrap: wrap;
  margin-top: 0;
  margin-bottom: 0;
}
.project-column { display: flex; }
.project-card {
  width: 100%;
  min-width: 0;
  overflow: hidden;
  border: 1px solid rgba(219,228,238,.9);
  border-radius: 18px;
  background: white;
  box-shadow: 0 8px 26px rgba(30,41,59,.06);
  transition: transform .32s cubic-bezier(.2,.8,.2,1), box-shadow .32s ease;
}
.project-card:hover,
.project-card:focus-within { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.image-wrapper { position: relative; overflow: hidden; }
.image-wrapper .artwork { min-height: auto; aspect-ratio: 1.56; transition: transform .55s cubic-bezier(.2,.8,.2,1); }
.video-thumbnail-artwork { background: var(--navy); }
.video-thumbnail-artwork img { position: absolute; inset: 0; z-index: 1; width: 100%; height: 100%; object-fit: cover; }
.thumbnail-play { position: relative; z-index: 2; width: 48px; height: 48px; display: inline-flex; align-items: center; justify-content: center; padding-left: 3px; border: 1px solid rgba(255,255,255,.5); border-radius: 50%; background: rgba(15,28,56,.78); color: white; font-size: 15px; line-height: 1; box-shadow: 0 10px 30px rgba(15,23,42,.28); }
.project-card:hover .image-wrapper .artwork,
.project-card:focus-within .image-wrapper .artwork { transform: scale(1.08); }
.category-badge,
.featured-badge {
  position: absolute;
  top: 15px;
  z-index: 3;
  padding: 6px 10px;
  border-radius: 7px;
  box-shadow: 0 4px 14px rgba(15,23,42,.12);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: .07em;
}
.category-badge { left: 15px; background: white; color: var(--orbit-heading); }
.featured-badge { right: 15px; background: var(--orbit-accent); color: white; text-transform: uppercase; }
.hover-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(10,24,49,.7);
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease, visibility .25s ease;
}
.project-card:hover .hover-overlay,
.project-card:focus-within .hover-overlay { opacity: 1; visibility: visible; }
.action-btn {
  width: 43px;
  height: 43px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 43px;
  padding: 0 !important;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 50%;
  background: rgba(255,255,255,.94);
  color: var(--orbit-heading);
  cursor: pointer;
  font-size: 21px;
  font-weight: 800;
  line-height: 1;
  text-align: center;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.action-btn:hover,
.action-btn:focus-visible { background: var(--orbit-accent); color: white; transform: scale(1.1); outline: 3px solid rgba(255,255,255,.5); }
.action-icon {
  width: 100%;
  height: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  text-align: center;
  transform: translateY(-1px);
}
.action-icon-search { position: relative; width: 20px; height: 20px; flex: 0 0 20px; transform: none; }
.action-icon-search::before { content: ""; position: absolute; left: 2px; top: 2px; width: 12px; height: 12px; border: 2px solid currentColor; border-radius: 50%; }
.action-icon-search::after { content: ""; position: absolute; left: 12px; top: 13px; width: 7px; height: 2px; border-radius: 2px; background: currentColor; transform: rotate(45deg); transform-origin: left center; }
.project-info { padding: 25px 25px 23px; }
.project-info h3 { margin: 0 0 9px; color: var(--orbit-heading); font-size: 21px; line-height: 1.3; letter-spacing: -.035em; }
.project-info h3 a { transition: color .2s ease; }
.project-info h3 a:hover,
.project-info h3 a:focus-visible { color: var(--orbit-accent-dark); }
.project-team { display: block; margin: -3px 0 8px; color: var(--orbit-accent-dark); font-size: 9px; font-weight: 850; letter-spacing: .07em; }
.project-info > p { min-height: 46px; margin: 0; color: #718096; font-size: 12px; line-height: 1.75; }
.project-meta { display: flex; align-items: end; justify-content: space-between; gap: 10px; margin-top: 23px; padding-top: 16px; border-top: 1px solid #edf1f5; }
.tech-tags,
.tech-badges { display: flex; flex-wrap: wrap; gap: 5px; }
.tech-tags span,
.tech-badges span { padding: 5px 9px; border-radius: 100px; background: #edf5f9; color: #526579; font-size: 9px; font-weight: 800; }
.project-year { color: var(--orbit-accent-dark); font-size: 11px; font-weight: 900; }

/* Footer and lightbox */
footer { padding: 27px 0; border-top: 1px solid var(--orbit-border); background: white; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.footer-inner .brand-mark { width: 32px; height: 32px; border-radius: 8px; font-size: 10px; }
.footer-inner p { margin: 0; color: #8b98a9; font-size: 10px; }
.footer-inner > a:last-child { color: var(--orbit-accent-dark); font-size: 9px; font-weight: 900; letter-spacing: .15em; }
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 70px 90px;
  background: rgba(5,12,27,.94);
  backdrop-filter: blur(10px);
  animation: lightbox-in .2s ease both;
}
@keyframes lightbox-in { from { opacity: 0; } }
.lightbox figure { width: min(900px, 80vw); margin: 0; }
.lightbox figure .artwork { min-height: auto; aspect-ratio: 1.65; border-radius: 18px; box-shadow: 0 35px 100px rgba(0,0,0,.45); }
.lightbox figure .mock-browser { width: 78%; }
.lightbox figcaption { display: flex; align-items: center; gap: 14px; padding-top: 18px; color: white; }
.lightbox figcaption span { color: #7dd3fc; font-size: 10px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.lightbox figcaption strong { font-size: 17px; }
.lightbox figcaption small { margin-left: auto; color: #94a3b8; }
.lightbox-close,
.lightbox-nav {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 !important;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  color: white;
  cursor: pointer;
  line-height: 1;
  text-align: center;
  transition: background .2s ease, transform .2s ease;
}
.lightbox-close { top: 24px; right: 28px; width: 45px; height: 45px; font-size: 26px; }
.lightbox-nav { top: 50%; width: 48px; height: 48px; font-size: 31px; transform: translateY(-50%); }
.lightbox-close:hover,
.lightbox-nav:hover { background: var(--orbit-accent); }
.lightbox-prev { left: 28px; }
.lightbox-next { right: 28px; }
.project-video-modal .modal-dialog { max-width: min(1000px, calc(100% - 30px)); }
.project-video-modal .modal-content { overflow: hidden; border: 0; border-radius: 20px; background: white; box-shadow: 0 34px 100px rgba(15,23,42,.35); }
.project-video-modal .modal-header { align-items: flex-start; padding: 25px 28px 20px; border-bottom: 1px solid var(--orbit-border); }
.project-video-modal .modal-title { margin: 5px 0 0; color: var(--orbit-heading); font-size: 28px; font-weight: 850; letter-spacing: -.04em; }
.project-video-modal .modal-header p { margin: 2px 0 0; color: #8491a4; font-size: 11px; font-weight: 750; }
.project-video-modal .modal-body { padding: 0; background: var(--navy); }
.modal-video-frame { overflow: hidden; width: 100%; background: var(--navy); }
.modal-video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.project-video-modal .modal-footer { padding: 18px 24px; border-top: 0; }
.project-video-modal .modal-footer .button { min-height: 45px; font-size: 12px; }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s cubic-bezier(.2,.8,.2,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
:focus-visible { outline: 3px solid rgba(14,165,233,.42); outline-offset: 3px; }

@media (max-width: 1199px) {
  .desktop-nav { display: none; }
}
@media (min-width: 992px) {
  .projects-grid > .project-column {
    flex: 0 0 auto;
    width: 33.333333%;
  }
}
@media (max-width: 767px) {
  .container, .header-inner { width: min(calc(100% - 30px), var(--container)); }
  .site-header { height: 68px; }
  .brand { gap: 9px; font-size: 14px; }
  .brand-mark { width: 35px; height: 35px; }
  .brand-home .brand-mark { width: 70px; }
  .brand-admin-group { gap: 9px; }
  .admin-login-button { padding-inline: 9px; font-size: 10px; }
  .campus-name { display: none; }
  .project-info { padding: 21px 20px; }
  .project-info > p { min-height: auto; }
  .hover-overlay { inset: auto 12px 12px auto; opacity: 1; visibility: visible; background: none; }
  .hover-overlay .action-btn { width: 38px; height: 38px; border: 0; box-shadow: 0 5px 15px rgba(15,23,42,.2); }
  .footer-inner { flex-direction: column; gap: 14px; text-align: center; }
  .lightbox { padding: 80px 18px; }
  .lightbox figure { width: 100%; }
  .lightbox figure .artwork { aspect-ratio: 1.15; }
  .lightbox figure .mock-browser { width: 92%; }
  .lightbox-nav { top: auto; bottom: 20px; }
  .lightbox-prev { left: calc(50% - 58px); }
  .lightbox-next { right: calc(50% - 58px); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  .project-card:hover,
  .project-card:focus-within,
  .project-card:hover .artwork,
  .project-card:focus-within .artwork { transform: none; }
}