.project-detail-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 88% 3%, rgba(36, 120, 151, 0.13), transparent 28rem),
    var(--canvas);
}

.project-detail-nav {
  position: sticky;
  z-index: 20;
  top: 0;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border-bottom: 1px solid rgba(184, 201, 210, 0.7);
  backdrop-filter: blur(16px);
}

.project-detail-nav-inner {
  width: min(calc(100% - 40px), 1420px);
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-inline: auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-soft);
  font-size: 0.84rem;
  font-weight: 750;
  text-decoration: none;
}

.back-link:hover,
.back-link:focus-visible {
  color: var(--steel-bright);
}

.project-detail-main {
  width: min(calc(100% - 40px), 1420px);
  display: grid;
  gap: 18px;
  padding-block: 28px 48px;
}

.project-detail-hero,
.project-detail-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.project-detail-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 54px);
}

.project-detail-hero::after {
  position: absolute;
  top: -110px;
  right: -90px;
  width: 310px;
  height: 310px;
  background: radial-gradient(circle, rgba(36, 120, 151, 0.18), transparent 68%);
  content: "";
  pointer-events: none;
}

.project-detail-kicker,
.project-detail-section-label {
  margin: 0;
  color: var(--steel-bright);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.13em;
}

.project-detail-hero h1 {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 9px 0 0;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -0.055em;
}

.project-detail-tags {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 22px;
}

.project-detail-tags span {
  padding: 6px 10px;
  color: var(--steel);
  background: var(--steel-pale);
  border: 1px solid #cadde5;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 750;
}

.project-detail-panel {
  padding: clamp(20px, 3.5vw, 36px);
}

.project-detail-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.project-detail-heading h2 {
  margin: 4px 0 0;
  font-size: clamp(1.35rem, 3vw, 2rem);
  letter-spacing: -0.04em;
}

.project-external-link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 5px;
  padding-bottom: 2px;
  color: var(--steel-bright);
  border-bottom: 1px solid currentColor;
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: none;
}

.simulator-frame {
  overflow: hidden;
  min-height: 800px;
  background: #0a1117;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
}

.simulator-frame iframe {
  display: block;
  width: 100%;
  min-height: 800px;
  border: 0;
}

/* 3D 데모 프레임. 하역기 시뮬레이션(800px)과 별개 높이를 씁니다.
   .simulator-frame iframe(0,2,0)을 이기려면 클래스 두 개를 겹쳐야 합니다. */
.simulator-frame.demo-frame,
.simulator-frame.demo-frame iframe {
  min-height: 700px;
}

.simulator-note {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 0.74rem;
}

.implementation-panel {
  display: grid;
  gap: 20px;
}

.implementation-heading {
  align-items: center;
  margin-bottom: 0;
}

.implementation-motivation {
  max-width: 980px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.7;
}

.dynamics-detail {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(340px, 0.75fr);
  gap: 22px;
  padding-block: 22px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.dynamics-copy h3,
.technical-detail-grid h3 {
  margin: 6px 0 0;
  font-size: 1.08rem;
  letter-spacing: -0.025em;
}

.dynamics-copy > p:not(.project-detail-section-label) {
  max-width: 800px;
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.72;
}

.dynamics-copy a {
  color: var(--steel-bright);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.dynamics-equation {
  display: grid;
  align-content: center;
  gap: 10px;
  min-width: 0;
  padding: 22px;
  color: #dbe8ed;
  background: #102f3c;
  border-radius: 12px;
}

.dynamics-equation code,
.dynamics-equation pre {
  margin: 0;
  color: #f1f8fa;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(0.78rem, 1.2vw, 0.92rem);
  line-height: 1.65;
  white-space: pre-wrap;
}

.dynamics-equation > p {
  margin: 2px 0 0;
  color: #a9c4ce;
  font-size: 0.7rem;
  line-height: 1.5;
}

.technical-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.technical-detail-grid article {
  padding: 19px;
  background: #f8fafb;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.technical-detail-label {
  margin: 0;
  color: var(--steel-bright);
  font-size: 0.66rem;
  font-weight: 850;
  letter-spacing: 0.09em;
}

.technical-detail-grid article > p:not(.technical-detail-label) {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 0.81rem;
  line-height: 1.68;
}

.project-detail-hero p:not(.project-detail-kicker) {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.75;
}

.pipeline-flow {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px;
}

.pipeline-flow article {
  padding: 14px 12px;
}

.pipeline-flow h3 {
  font-size: 0.84rem;
  line-height: 1.45;
}

.detail-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.7;
}

.image-figure {
  display: grid;
  gap: 10px;
  margin: 0;
}

.image-figure a {
  display: block;
}

.image-figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.patent-detail-panel {
  border-left: 4px solid var(--steel-bright);
}

.patent-detail-heading {
  align-items: center;
}

.patent-status {
  flex: 0 0 auto;
  padding: 6px 10px;
  color: var(--steel);
  background: var(--steel-pale);
  border: 1px solid #cadde5;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
}

.patent-detail-panel h3 {
  max-width: 920px;
  margin: 0;
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  line-height: 1.55;
  letter-spacing: -0.025em;
}

.patent-detail-panel > p {
  max-width: 900px;
  margin: 11px 0 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
  line-height: 1.7;
}

.project-detail-footer {
  padding: 24px 0;
  color: #bed0d8;
  background: #102f3c;
  font-size: 0.76rem;
}

.project-detail-footer .page-shell {
  width: min(calc(100% - 40px), 1420px);
}

@media (max-width: 700px) {
  .project-detail-nav-inner,
  .project-detail-main,
  .project-detail-footer .page-shell {
    width: min(calc(100% - 24px), var(--content-width));
  }

  .project-detail-main {
    padding-block: 14px 30px;
  }

  .project-detail-heading {
    display: grid;
    align-items: start;
  }

  .dynamics-detail,
  .technical-detail-grid {
    grid-template-columns: 1fr;
  }

  .dynamics-equation {
    padding: 18px;
  }

  .project-external-link,
  .patent-status {
    width: fit-content;
  }

  .simulator-frame,
  .simulator-frame iframe {
    min-height: 620px;
  }
}

@media print {
  .project-detail-nav,
  .simulator-frame,
  .simulator-note,
  .project-external-link,
  .project-detail-footer {
    display: none !important;
  }

  .project-detail-page,
  .project-detail-hero,
  .project-detail-panel {
    background: white;
    box-shadow: none;
  }
}