:root {
  color-scheme: dark;
  --bridge: #090d10;
  --bridge-deep: #040607;
  --steel: #24323a;
  --steel-2: #314650;
  --glass: #87c5d4;
  --text: #e8f0ed;
  --muted: #95aaa6;
  --amber: #d8b46a;
  --signal: #8ad7c1;
  --danger: #e0876a;
  --panel: rgba(13, 21, 24, 0.88);
  --line: rgba(196, 229, 223, 0.22);
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 18%, rgba(58, 86, 89, 0.42), transparent 34rem),
    linear-gradient(180deg, #11191d 0%, var(--bridge) 42%, var(--bridge-deep) 100%);
}

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.5rem clamp(1rem, 3vw, 2rem) 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.topbar {
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--panel);
  padding: 1.25rem 1.5rem;
}

.eyebrow {
  margin: 0 0 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--muted);
}

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
}

.subtitle {
  margin: 0;
  max-width: 40rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.console-layout {
  display: grid;
  grid-template-columns: minmax(0, 2.1fr) minmax(16rem, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.viewer-panel {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  overflow: hidden;
  background: var(--panel);
  height: 32rem;
}

#viewer {
  width: 100%;
  height: 100%;
  --poster-color: transparent;
  background: #0c1315;
}

.viewer-panel .empty-note {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.drop-panel,
.staged-panel,
.upload-panel,
.model-list-panel,
.model-detail-panel {
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--panel);
  padding: 1rem 1.1rem;
}

.drop-panel {
  border-style: dashed;
  cursor: pointer;
  user-select: none;
}

.drop-panel.is-dragover {
  border-color: var(--signal);
  background: rgba(138, 215, 193, 0.12);
}

.drop-panel h2 {
  margin: 0 0 0.35rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.drop-title {
  margin: 0;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 700;
}

.drop-hint {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.4;
}

.staged-panel {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.staged-panel h2 {
  margin: 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.staged-preview {
  min-height: 8rem;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: rgba(4, 8, 10, 0.55);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.staged-preview img {
  display: block;
  max-width: 100%;
  max-height: 12rem;
  object-fit: contain;
}

.staged-file-icon {
  width: 4.25rem;
  height: 4.25rem;
  border-radius: 0.6rem;
  display: grid;
  place-items: center;
  background: rgba(138, 215, 193, 0.12);
  color: var(--signal);
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.staged-meta {
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.staged-meta dt {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.staged-meta dd {
  margin: 0.1rem 0 0;
  font-size: 0.82rem;
  color: var(--text);
  word-break: break-word;
}

.secondary-button {
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  background: rgba(4, 8, 10, 0.35);
  color: var(--text);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.5rem;
  cursor: pointer;
}

.secondary-button:hover,
.secondary-button:focus-visible {
  border-color: var(--signal);
  outline: none;
}

#uploadForm {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

#uploadInput,
#uploadNameInput {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  background: rgba(4, 8, 10, 0.6);
  color: var(--text);
  font: inherit;
  font-size: 0.8rem;
  padding: 0.4rem 0.55rem;
}

#uploadButton {
  border: 1px solid rgba(216, 180, 106, 0.5);
  border-radius: 0.4rem;
  background: rgba(20, 17, 9, 0.5);
  color: var(--amber);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.5rem;
  cursor: pointer;
}

#uploadButton:hover,
#uploadButton:focus-visible {
  border-color: var(--amber);
  background: rgba(20, 17, 9, 0.75);
  outline: none;
}

#uploadButton:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.upload-status {
  margin: 0.6rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
}

.upload-status.is-error {
  color: var(--danger);
}

.upload-status.is-success {
  color: var(--signal);
}

.progress-panel {
  margin-top: 0.75rem;
  padding: 0.75rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: rgba(4, 8, 10, 0.45);
}

.progress-head {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: baseline;
  margin-bottom: 0.4rem;
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.progress-panel progress {
  width: 100%;
  height: 0.7rem;
  appearance: none;
}

.progress-panel progress::-webkit-progress-bar {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
}

.progress-panel progress::-webkit-progress-value {
  background: linear-gradient(90deg, rgba(138, 215, 193, 0.85), rgba(216, 180, 106, 0.95));
  border-radius: 999px;
}

.progress-panel progress::-moz-progress-bar {
  background: linear-gradient(90deg, rgba(138, 215, 193, 0.85), rgba(216, 180, 106, 0.95));
  border-radius: 999px;
}

.model-list-panel h2,
.model-detail-panel h2 {
  margin: 0 0 0.6rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.model-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  max-height: 15rem;
  overflow-y: auto;
}

.model-list li {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  padding: 0.45rem 0.6rem;
  font-size: 0.82rem;
  cursor: pointer;
}

.model-list li:hover {
  background: rgba(138, 215, 193, 0.08);
}

.model-list li.is-selected {
  border-color: var(--signal);
  background: rgba(138, 215, 193, 0.14);
}

.model-list .model-name {
  color: var(--text);
}

.model-list .model-meta {
  color: var(--muted);
  font-size: 0.76rem;
}

.model-detail-panel dl {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.model-detail-panel dt {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.model-detail-panel dd {
  margin: 0.1rem 0 0;
  font-size: 0.82rem;
  color: var(--text);
  word-break: break-word;
}

.model-detail-panel a {
  color: var(--signal);
  text-decoration: none;
}

.model-detail-panel a:hover,
.model-detail-panel a:focus-visible {
  text-decoration: underline;
}

.empty-note {
  color: var(--muted);
  font-size: 0.8rem;
  font-style: italic;
}

.model-list-panel .empty-note {
  margin-top: 0.6rem;
}

.model-list-panel code {
  font-size: 0.78rem;
  color: var(--signal);
}

.tips-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.45;
}

@media (max-width: 900px) {
  .console-layout {
    grid-template-columns: 1fr;
  }
  .viewer-panel {
    height: 22rem;
  }
}