:root {
  --bg: #0d1324;
  --ink: #edf2ff;
  --ink-muted: #a7b3d1;
  --line: rgba(153, 172, 219, 0.28);
  --card: rgba(17, 26, 49, 0.72);
  --card-strong: rgba(24, 36, 66, 0.9);
  --accent: #4cd6b1;
  --accent-2: #f3b86a;
  --chip: rgba(123, 148, 212, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: 'Space Grotesk', 'Noto Sans KR', sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 10% -8%, #1a2850, transparent 34%),
    radial-gradient(circle at 85% 0%, #263d6d, transparent 40%),
    var(--bg);
  overflow-x: hidden;
}

.bg-orb {
  position: fixed;
  width: 42vw;
  height: 42vw;
  border-radius: 50%;
  filter: blur(46px);
  z-index: -2;
  opacity: 0.45;
}

.orb-a {
  left: -12vw;
  top: -10vw;
  background: #3de0ba;
}

.orb-b {
  right: -16vw;
  top: 22vh;
  background: #ffd089;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at center, black 30%, transparent 95%);
}

.shell {
  width: min(1180px, 100% - 32px);
  margin: 22px auto 48px;
  display: grid;
  gap: 16px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(14, 22, 42, 0.72);
  backdrop-filter: blur(6px);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand {
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: #d8e2ff;
}

.ghost-link {
  color: #dce7ff;
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.88rem;
}

.ghost-link:hover {
  border-color: rgba(76, 214, 177, 0.62);
}

.hero {
  padding: clamp(24px, 5vw, 48px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(150deg, rgba(16, 26, 52, 0.94), rgba(28, 42, 78, 0.72));
}

.eyebrow {
  margin: 0;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 12px 0;
  font-size: clamp(1.9rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero-copy {
  margin: 0;
  max-width: 760px;
  color: var(--ink-muted);
  line-height: 1.65;
}

.hero-actions {
  margin-top: 20px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn-primary,
.btn-ghost {
  text-decoration: none;
  padding: 10px 15px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.93rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #35b8ee);
  color: #102239;
}

.btn-ghost {
  border: 1px solid var(--line);
  color: #dbe6ff;
  background: rgba(255, 255, 255, 0.03);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.metric-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: var(--card);
}

.metric-card p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.84rem;
}

.metric-card strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(1.3rem, 4vw, 2rem);
  color: #f1f5ff;
}

.control {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: var(--card);
  display: grid;
  gap: 12px;
}

.flagship,
.readiness {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: var(--card);
}

.flagship-head h2,
.readiness h2 {
  margin: 6px 0;
}

.flagship-head p {
  margin: 0;
  color: var(--ink-muted);
}

.flagship-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.flagship-card {
  border: 1px solid rgba(150, 171, 222, 0.25);
  border-radius: 12px;
  padding: 12px;
  background: rgba(15, 23, 43, 0.74);
  display: grid;
  gap: 8px;
}

.flagship-index {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.flagship-card h3 {
  margin: 0;
}

.flagship-card p {
  margin: 0;
  color: var(--ink-muted);
}

.flagship-card a {
  width: fit-content;
  text-decoration: none;
  border-radius: 10px;
  padding: 7px 11px;
  background: rgba(76, 214, 177, 0.16);
  border: 1px solid rgba(76, 214, 177, 0.4);
  color: #dffff5;
  font-weight: 600;
  font-size: 0.88rem;
}

.readiness ul {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--ink-muted);
  display: grid;
  gap: 6px;
}

.disclosure {
  margin: 12px 0 0;
  color: #9eb0d6;
  line-height: 1.55;
  font-size: 0.92rem;
}

.control h2 {
  margin: 6px 0 0;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  border: 1px solid var(--line);
  background: var(--chip);
  color: #d8e3ff;
  border-radius: 999px;
  padding: 7px 12px;
  font-family: inherit;
  cursor: pointer;
}

.chip.active {
  border-color: rgba(76, 214, 177, 0.7);
  background: rgba(76, 214, 177, 0.16);
  color: #ebfff8;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 12px;
}

.project-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  background: linear-gradient(165deg, var(--card-strong), rgba(23, 35, 62, 0.88));
  display: grid;
  gap: 10px;
  min-height: 350px;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-index {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: #9fb0d7;
}

.tag {
  font-size: 0.76rem;
  color: #142640;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 999px;
  padding: 5px 10px;
  font-weight: 700;
}

.project-card h3 {
  margin: 0;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
}

.hook {
  margin: 0;
  color: #e5eeff;
  font-weight: 500;
  line-height: 1.5;
}

.purpose {
  margin: 0;
  color: var(--ink-muted);
  line-height: 1.55;
}

.project-card ul {
  margin: 0;
  padding-left: 18px;
  color: #d2def9;
  display: grid;
  gap: 4px;
}

.card-foot {
  margin-top: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.foot-label {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #8ea1cb;
}

.foot-value {
  margin: 4px 0 0;
  color: #f3f7ff;
  font-weight: 600;
}

.project-card a {
  width: fit-content;
  text-decoration: none;
  margin-top: 8px;
  border-radius: 10px;
  padding: 9px 12px;
  background: rgba(76, 214, 177, 0.16);
  border: 1px solid rgba(76, 214, 177, 0.4);
  color: #dffff5;
  font-weight: 600;
}

.project-card:hover {
  transform: translateY(-3px);
  transition: transform 200ms ease;
}

.principles {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: var(--card);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.principles article {
  border: 1px solid rgba(150, 171, 222, 0.2);
  border-radius: 12px;
  padding: 12px;
  background: rgba(15, 23, 43, 0.7);
}

.principles h3 {
  margin: 0 0 8px;
}

.principles p {
  margin: 0;
  color: var(--ink-muted);
  line-height: 1.5;
}

.contact {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: var(--card);
}

.contact h2 {
  margin: 6px 0 10px;
}

.contact-email {
  text-decoration: none;
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: #dcfff4;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 420ms ease, transform 420ms ease;
}

.viewer-body {
  margin: 0;
  background: #0d1324;
}

.viewer-layout {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
}

.viewer-topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(17, 26, 49, 0.86);
}

.viewer-topbar h1 {
  margin: 0;
  font-size: 1rem;
}

.back-link {
  text-decoration: none;
  color: #0d1f35;
  background: linear-gradient(135deg, var(--accent), #a4d7ff);
  border-radius: 10px;
  padding: 7px 12px;
  font-size: 0.83rem;
  font-weight: 700;
}

.viewer-frame-wrap {
  padding: 10px;
}

#projectFrame {
  width: 100%;
  height: calc(100vh - 82px);
  border: 1px solid var(--line);
  border-radius: 12px;
  background: white;
}

.viewer-error {
  margin: 14px;
  color: var(--ink-muted);
}

.viewer-error a {
  color: #dffff5;
  text-underline-offset: 3px;
}

@media (max-width: 980px) {
  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flagship-grid {
    grid-template-columns: 1fr;
  }

  .principles {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(1180px, 100% - 20px);
    margin-top: 12px;
  }

  .hero h1 {
    font-size: 2.05rem;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .viewer-topbar {
    flex-wrap: wrap;
  }
}