:root {
  --bg: #0a0a0a;
  --surface: rgba(14, 14, 18, 0.84);
  --surface-strong: rgba(18, 18, 24, 0.96);
  --panel: rgba(11, 11, 14, 0.92);
  --line: rgba(245, 245, 245, 0.09);
  --line-strong: rgba(245, 245, 245, 0.16);
  --text: #f5f5f5;
  --muted: rgba(245, 245, 245, 0.62);
  --primary-neon: #00f0ff;
  --accent: #ff2e88;
  --secondary: #a3ff12;
  --shadow: 0 38px 120px rgba(0, 0, 0, 0.56);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "SF Pro Display", "Suisse Int'l", "IBM Plex Sans KR",
    "Noto Sans KR", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 14%, rgba(0, 240, 255, 0.14), transparent 25%),
    radial-gradient(circle at 86% 16%, rgba(255, 46, 136, 0.14), transparent 24%),
    radial-gradient(circle at 74% 84%, rgba(163, 255, 18, 0.11), transparent 22%),
    linear-gradient(180deg, #0b0b0d 0%, #050505 100%);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.18;
}

body::after {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.03), transparent);
  transform: translateX(-100%);
  animation: scan 14s linear infinite;
  opacity: 0.14;
}

@keyframes scan {
  to {
    transform: translateX(100%);
  }
}

body.viewer-open {
  overflow: hidden;
}

.shell {
  position: relative;
  z-index: 1;
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 88px;
}

#loading {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  background: rgba(6, 6, 8, 0.95);
  transition:
    opacity 0.35s ease,
    visibility 0.35s ease;
}

#loading.is-hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-panel {
  display: grid;
  gap: 10px;
  padding: 24px 30px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    rgba(14, 14, 18, 0.94);
  box-shadow: var(--shadow);
  text-align: center;
}

.loading-tag,
.eyebrow,
.stage-kicker,
.node-index,
.version-status,
.viewer-kicker,
.release-state {
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.68rem;
}

.loading-tag,
.eyebrow,
.stage-kicker,
.node-index,
.version-status,
.viewer-kicker,
.release-state {
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(56px) scale(0.985);
  transition:
    opacity 0.9s cubic-bezier(0.2, 0.7, 0.16, 1),
    transform 0.9s cubic-bezier(0.2, 0.7, 0.16, 1);
  transition-delay: var(--delay, 0s);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.hero,
.category-panel,
.empty-state {
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015)),
    var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero {
  display: grid;
  gap: 26px;
  padding: 36px;
  border-radius: 38px;
}

.hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow {
  margin: 0;
  color: var(--primary-neon);
  text-shadow: 0 0 14px rgba(0, 240, 255, 0.38);
}

.hero-copy {
  max-width: 920px;
}

h1 {
  margin: 0;
  font-size: clamp(3.2rem, 10vw, 7.4rem);
  line-height: 0.88;
  letter-spacing: -0.06em;
}

.hero-text {
  margin: 12px 0 0;
  max-width: 640px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 142px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  text-decoration: none;
  transition:
    transform 0.22s ease,
    box-shadow 0.22s ease,
    border-color 0.22s ease,
    background 0.22s ease;
}

.social-link:hover,
.social-link:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.social-link.instagram {
  border-color: rgba(255, 46, 136, 0.26);
  box-shadow: 0 14px 30px rgba(255, 46, 136, 0.12);
}

.social-link.instagram:hover,
.social-link.instagram:focus-visible {
  border-color: rgba(255, 46, 136, 0.48);
  background: rgba(255, 46, 136, 0.1);
}

.social-link.spotify {
  border-color: rgba(163, 255, 18, 0.22);
  box-shadow: 0 14px 30px rgba(163, 255, 18, 0.1);
}

.social-link.spotify:hover,
.social-link.spotify:focus-visible {
  border-color: rgba(163, 255, 18, 0.44);
  background: rgba(163, 255, 18, 0.08);
}

input {
  width: 100%;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  outline: none;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font: inherit;
  transition:
    border-color 0.22s ease,
    box-shadow 0.22s ease,
    transform 0.22s ease,
    background 0.22s ease;
}

input::placeholder {
  color: rgba(245, 245, 245, 0.44);
}

input:focus {
  border-color: rgba(0, 240, 255, 0.42);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 0 4px rgba(0, 240, 255, 0.08);
  transform: translateY(-1px);
}

.archive-stack {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

.category-panel {
  position: relative;
  overflow: visible;
  border-radius: 36px;
}

.category-panel::before {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: 35px;
  background: linear-gradient(
    140deg,
    rgba(255, 255, 255, 0.09),
    rgba(255, 255, 255, 0) 34%
  );
  pointer-events: none;
}

.theme-cyan {
  --tone: var(--primary-neon);
  --tone-rgb: 0, 240, 255;
}

.theme-pink {
  --tone: var(--accent);
  --tone-rgb: 255, 46, 136;
}

.theme-lime {
  --tone: var(--secondary);
  --tone-rgb: 163, 255, 18;
}

.panel-orb,
.panel-noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.panel-orb {
  background: radial-gradient(circle at 88% 18%, rgba(var(--tone-rgb), 0.16), transparent 28%);
  filter: blur(8px);
}

.panel-noise {
  background:
    linear-gradient(135deg, rgba(var(--tone-rgb), 0.08), transparent 30%),
    radial-gradient(circle at 15% 85%, rgba(var(--tone-rgb), 0.08), transparent 24%);
  opacity: 0.7;
}

.panel-watermark {
  position: absolute;
  right: 18px;
  bottom: -10px;
  z-index: 0;
  font-size: clamp(5rem, 16vw, 12rem);
  line-height: 0.8;
  letter-spacing: -0.08em;
  color: rgba(255, 255, 255, 0.03);
  user-select: none;
}

.category-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(340px, 0.9fr) minmax(0, 1.1fr);
  gap: 24px;
  padding: 30px;
}

.detail-stage {
  position: sticky;
  top: 24px;
  align-self: start;
  display: grid;
  gap: 18px;
  padding: 22px;
  border: 1px solid rgba(var(--tone-rgb), 0.18);
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(var(--tone-rgb), 0.08), rgba(255, 255, 255, 0.02)),
    var(--panel);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

.stage-head {
  display: grid;
  gap: 12px;
}

.stage-kicker {
  margin: 0;
}

.stage-title-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
}

.stage-code {
  display: inline-grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border: 1px solid rgba(var(--tone-rgb), 0.34);
  border-radius: 22px;
  background: rgba(var(--tone-rgb), 0.1);
  color: var(--tone);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  box-shadow: inset 0 0 26px rgba(var(--tone-rgb), 0.08);
}

.stage-path {
  margin: 0 0 8px;
  color: var(--muted);
  line-height: 1.6;
}

.stage-title {
  margin: 0;
  font-size: clamp(2rem, 4.6vw, 3.8rem);
  line-height: 0.94;
  letter-spacing: -0.05em;
}

.stage-release {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.release-pill {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border: 1px solid rgba(var(--tone-rgb), 0.2);
  border-radius: 999px;
  background: rgba(var(--tone-rgb), 0.12);
  color: var(--text);
  font-weight: 600;
}

.stage-copy {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
}

.stage-tags,
.stage-metrics,
.stage-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stage-tag {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.metric {
  display: grid;
  gap: 5px;
  min-width: 112px;
  padding: 14px 15px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.metric span {
  color: var(--muted);
  font-size: 0.82rem;
}

.metric strong {
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.stage-action {
  padding: 13px 16px;
  border: 1px solid rgba(var(--tone-rgb), 0.18);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition:
    transform 0.22s ease,
    box-shadow 0.22s ease,
    border-color 0.22s ease,
    background 0.22s ease;
}

.stage-action:hover,
.stage-action:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.stage-action.primary {
  background: linear-gradient(
    135deg,
    rgba(var(--tone-rgb), 0.92),
    rgba(245, 245, 245, 0.94)
  );
  color: #08090b;
  box-shadow: 0 18px 38px rgba(var(--tone-rgb), 0.22);
}

.stage-action.subtle {
  border-color: rgba(255, 255, 255, 0.1);
}

.branch-map {
  position: relative;
  display: grid;
  gap: 18px;
  min-height: 620px;
}

.root-node {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 20px 22px;
  border: 1px solid rgba(var(--tone-rgb), 0.22);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(var(--tone-rgb), 0.1), rgba(255, 255, 255, 0.02)),
    rgba(255, 255, 255, 0.03);
}

.root-node strong {
  font-size: 1.7rem;
  letter-spacing: -0.04em;
}

.root-node p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.branch-list {
  position: relative;
  display: grid;
  gap: 18px;
  padding-left: 42px;
}

.branch-list::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 14px;
  width: 1px;
  background: linear-gradient(
    180deg,
    rgba(var(--tone-rgb), 0.42),
    rgba(255, 255, 255, 0.08)
  );
}

.project-branch {
  position: relative;
  display: grid;
  gap: 14px;
}

.project-branch::before {
  content: "";
  position: absolute;
  top: 28px;
  left: -28px;
  width: 28px;
  height: 1px;
  background: rgba(var(--tone-rgb), 0.3);
}

.project-node {
  position: relative;
  display: grid;
  gap: 7px;
  width: 100%;
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition:
    transform 0.22s ease,
    border-color 0.22s ease,
    background 0.22s ease,
    box-shadow 0.22s ease;
}

.project-node strong {
  font-size: 1.15rem;
}

.project-node span:last-child {
  color: var(--muted);
  line-height: 1.6;
}

.project-node:hover,
.project-node:focus-visible,
.project-branch.is-selected .project-node {
  transform: translateY(-2px);
  border-color: rgba(var(--tone-rgb), 0.36);
  background: rgba(var(--tone-rgb), 0.08);
  box-shadow: 0 20px 42px rgba(0, 0, 0, 0.28);
  outline: none;
}

.version-rail {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-left: 24px;
}

.version-rail::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 10px;
  width: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.version-node {
  position: relative;
  display: inline-grid;
  gap: 4px;
  min-width: 104px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  cursor: pointer;
  opacity: 0.82;
  transform: translateY(10px);
  transition:
    transform 0.3s ease,
    opacity 0.3s ease,
    border-color 0.22s ease,
    background 0.22s ease,
    box-shadow 0.22s ease;
  transition-delay: var(--node-delay, 0s);
}

.version-node::before {
  content: "";
  position: absolute;
  top: 50%;
  left: -14px;
  width: 14px;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.category-panel.is-visible .version-node {
  opacity: 1;
  transform: translateY(0);
}

.version-label {
  font-size: 0.95rem;
  font-weight: 600;
}

.version-node:hover,
.version-node:focus-visible,
.version-node.is-selected {
  border-color: rgba(var(--tone-rgb), 0.38);
  background: rgba(var(--tone-rgb), 0.12);
  box-shadow: 0 16px 32px rgba(var(--tone-rgb), 0.16);
  outline: none;
}

.empty-state {
  margin-top: 18px;
  padding: 18px 20px;
  border-radius: 24px;
  color: var(--muted);
}

.action-toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 70;
  min-width: 260px;
  max-width: min(520px, calc(100vw - 32px));
  padding: 14px 18px;
  border: 1px solid rgba(0, 240, 255, 0.24);
  border-radius: 999px;
  background:
    linear-gradient(180deg, rgba(0, 240, 255, 0.14), rgba(255, 46, 136, 0.1)),
    rgba(12, 12, 16, 0.9);
  color: var(--text);
  text-align: center;
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.36);
  opacity: 0;
  transform: translate(-50%, 16px) scale(0.98);
  pointer-events: none;
  transition:
    opacity 0.24s ease,
    transform 0.24s ease;
}

.action-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

#viewer {
  position: fixed;
  inset: 18px;
  z-index: 50;
  display: none;
  flex-direction: column;
  border: 1px solid rgba(0, 240, 255, 0.22);
  border-radius: 28px;
  background: rgba(8, 8, 10, 0.92);
  box-shadow: 0 36px 120px rgba(0, 0, 0, 0.55);
  overflow: hidden;
  backdrop-filter: blur(16px);
}

#viewer.is-visible {
  display: flex;
}

#topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(0, 240, 255, 0.08), rgba(255, 46, 136, 0.06)),
    rgba(10, 10, 12, 0.94);
}

#back {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 11px 16px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
}

#back:hover,
#back:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(0, 240, 255, 0.34);
  background: rgba(255, 255, 255, 0.07);
  outline: none;
}

.viewer-meta {
  display: grid;
  justify-items: end;
  gap: 4px;
}

#title {
  font-size: 1rem;
  font-weight: 600;
}

iframe {
  flex: 1;
  width: 100%;
  border: none;
  background: #0c1117;
}

@media (max-width: 1100px) {
  .category-shell {
    grid-template-columns: 1fr;
  }

  .detail-stage {
    position: relative;
    top: 0;
  }

  .branch-map {
    min-height: auto;
  }
}

@media (max-width: 860px) {
  .shell {
    width: min(100% - 20px, 100%);
    padding-top: 14px;
  }

  .hero {
    padding: 24px;
    border-radius: 30px;
  }

  .hero-top {
    flex-direction: column;
    align-items: start;
  }

  .category-shell {
    padding: 22px;
  }

  .stage-title-row {
    grid-template-columns: 1fr;
  }

  .stage-actions {
    flex-direction: column;
  }

  .stage-action {
    width: 100%;
  }
}

@media (max-width: 720px) {
  h1 {
    font-size: clamp(2.8rem, 15vw, 4.9rem);
  }

  .stage-title {
    font-size: clamp(1.9rem, 10vw, 3rem);
  }

  .stage-code {
    width: 60px;
    height: 60px;
    border-radius: 18px;
  }

  .branch-list {
    padding-left: 26px;
  }

  .project-branch::before {
    left: -12px;
    width: 12px;
  }

  .version-rail {
    padding-left: 18px;
  }

  #viewer {
    inset: 10px;
    border-radius: 24px;
  }

  #topbar {
    align-items: start;
    flex-direction: column;
  }

  .viewer-meta {
    justify-items: start;
  }
}