*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --surface2: #0f3460;
  --accent: #e94560;
  --accent2: #4ecdc4;
  --text: #eaeaea;
  --text-dim: #8892a4;
  --border: rgba(255,255,255,0.08);
  --header-h: 48px;
  --sidebar-w: 260px;
}

html, body {
  height: 100%;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

/* ── Header ─────────────────────────────── */
#header {
  height: var(--header-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  gap: 10px;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
}

.header-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
.logo-leone { height: 26px; width: auto; flex-shrink: 0; }
.header-subtitle {
  color: var(--text-dim);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 240px;
}

.header-right { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }

.btn-action {
  height: 32px;
  background: rgba(233, 69, 96, 0.14);
  border: 1px solid rgba(233, 69, 96, 0.35);
  border-radius: 6px;
  color: #ffd7de;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn-action:hover {
  background: rgba(233, 69, 96, 0.22);
  border-color: rgba(233, 69, 96, 0.58);
  color: #fff;
}

#model-select {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 12px;
  cursor: pointer;
  outline: none;
  max-width: 200px;
}
#model-select:focus { border-color: var(--accent2); }

.btn-icon {
  width: 32px; height: 32px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.btn-icon svg { width: 16px; height: 16px; }
.btn-icon:hover { color: var(--text); border-color: var(--accent2); background: rgba(78,205,196,0.08); }
.btn-icon.active { color: var(--accent2); border-color: var(--accent2); background: rgba(78,205,196,0.12); }

/* ── Layout ──────────────────────────────── */
#layout {
  display: flex;
  height: calc(100vh - var(--header-h));
  margin-top: var(--header-h);
}

/* ── Sidebar ─────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}

.work-meta-panel {
  padding: 12px 12px 10px;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at top left, rgba(78,205,196,0.12), transparent 55%),
    linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
}

.work-meta-panel.hidden {
  display: none;
}

.work-meta-header {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #9adfd8;
  margin-bottom: 9px;
}

.work-meta-row + .work-meta-row {
  margin-top: 8px;
}

.work-meta-label {
  display: block;
  font-size: 10px;
  color: var(--text-dim);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.work-meta-value {
  display: block;
  width: 100%;
  padding: 7px 8px;
  border-radius: 8px;
  border: 1px solid rgba(78,205,196,0.16);
  background: rgba(8,18,36,0.38);
  color: #f4fffe;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  line-height: 1.45;
  word-break: break-all;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.btn-small {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dim);
  font-size: 10px;
  padding: 2px 8px;
  cursor: pointer;
  transition: color 0.15s;
}
.btn-small:hover { color: var(--text); }

.node-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px 0;
}
.node-list::-webkit-scrollbar { width: 4px; }
.node-list::-webkit-scrollbar-track { background: transparent; }
.node-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

.node-placeholder {
  color: var(--text-dim);
  font-size: 12px;
  padding: 20px 14px;
  line-height: 1.6;
}

/* Group header in sidebar */
.node-group {
  padding: 6px 12px 2px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

/* Node row */
.node-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  cursor: pointer;
  border-radius: 0;
  transition: background 0.1s;
  user-select: none;
}
.node-row:hover { background: rgba(255,255,255,0.04); }
.node-row.selected { background: rgba(78,205,196,0.1); }
.node-row.isolated { outline: 1px solid var(--accent2); outline-offset: -1px; }

.node-color-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.node-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 12px;
  color: var(--text);
}

.node-vis-btn {
  width: 22px; height: 22px;
  background: none;
  border: none;
  color: #94a3c3;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  border-radius: 3px;
  flex-shrink: 0;
  opacity: 1;
  transition: color 0.15s, transform 0.15s;
  padding: 0;
}
.node-vis-btn svg { width: 16px; height: 16px; display: block; }
.node-row:hover .node-vis-btn,
.node-vis-btn:hover { color: #e6eefc; transform: scale(1.05); }
.node-vis-btn.is-visible { color: #aab6d3; }
.node-vis-btn.is-hidden { color: #f2a65a; }

.node-download-btn {
  width: 26px;
  height: 26px;
  padding: 0;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02)),
    rgba(15, 52, 96, 0.42);
  color: #9adfd8;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  backdrop-filter: blur(10px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.06),
    0 1px 2px rgba(0,0,0,0.18);
  transition: background 0.16s, border-color 0.16s, color 0.16s, transform 0.16s, box-shadow 0.16s;
}

.node-download-btn svg {
  width: 13px;
  height: 13px;
  display: block;
  opacity: 0.92;
}

.node-row:hover .node-download-btn,
.node-download-btn:hover {
  background:
    linear-gradient(180deg, rgba(78,205,196,0.18), rgba(78,205,196,0.08)),
    rgba(15, 52, 96, 0.58);
  border-color: rgba(78,205,196,0.34);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.08),
    0 6px 16px rgba(0,0,0,0.22);
}

.node-download-btn:active {
  transform: translateY(0);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.04),
    0 1px 3px rgba(0,0,0,0.16);
}

/* ── Canvas ───────────────────────────────── */
#canvas-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.view-toolbar {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02)),
    rgba(14, 20, 35, 0.82);
  backdrop-filter: blur(14px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.05),
    0 12px 28px rgba(0,0,0,0.28);
  z-index: 35;
}

.view-btn {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  color: #dbe6fb;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
  transition: transform 0.14s, border-color 0.14s, background 0.14s, color 0.14s, box-shadow 0.14s;
  position: relative;
}

.view-btn:hover {
  transform: translateY(-1px) scale(1.02);
  border-color: rgba(78,205,196,0.28);
  background:
    linear-gradient(180deg, rgba(78,205,196,0.14), rgba(78,205,196,0.04)),
    rgba(255,255,255,0.02);
  color: #ffffff;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.05),
    0 8px 18px rgba(0,0,0,0.22);
}

.view-btn:active {
  transform: translateY(0) scale(0.98);
}

.view-btn svg {
  width: 18px;
  height: 18px;
  display: block;
}

.view-btn::after {
  content: attr(data-tooltip);
  position: absolute;
  top: 50%;
  right: calc(100% + 10px);
  transform: translateY(-50%) translateX(4px);
  background: rgba(8, 10, 16, 0.94);
  color: #f7f9fc;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 7px;
  padding: 6px 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s ease, transform 0.12s ease;
  box-shadow: 0 10px 22px rgba(0,0,0,0.3);
}

.view-btn:hover::after,
.view-btn:focus-visible::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.view-btn.is-active {
  border-color: rgba(78,205,196,0.54);
  background:
    linear-gradient(180deg, rgba(78,205,196,0.22), rgba(78,205,196,0.08)),
    rgba(255,255,255,0.03);
  color: #ffffff;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.08),
    0 10px 22px rgba(0,0,0,0.24);
}

#canvas3d {
  display: block;
  width: 100%;
  height: 100%;
}

/* ── Empty state ───────────────────────────── */
.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 25;
  padding: 24px;
}
.empty-state.hidden { display: none; }

.empty-state-card {
  pointer-events: auto;
  width: min(420px, 88%);
  padding: 32px 32px 28px;
  border-radius: 20px;
  background:
    radial-gradient(circle at top right, rgba(78,205,196,0.18), transparent 60%),
    radial-gradient(circle at bottom left, rgba(233,69,96,0.12), transparent 55%),
    linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02)),
    rgba(14, 20, 35, 0.78);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.06),
    0 30px 80px rgba(0,0,0,0.42);
  text-align: center;
  animation: empty-state-rise 0.5s ease;
}

@keyframes empty-state-rise {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.empty-state-icon {
  width: 72px;
  height: 72px;
  color: var(--accent2);
  margin: 0 auto 14px;
  display: block;
  filter: drop-shadow(0 8px 24px rgba(78,205,196,0.32));
  animation: empty-state-pulse 3.5s ease-in-out infinite;
}

@keyframes empty-state-pulse {
  0%, 100% { transform: translateY(0) scale(1); }
  50%      { transform: translateY(-3px) scale(1.04); }
}

.empty-state-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.empty-state-subtitle {
  font-size: 12.5px;
  color: var(--text-dim);
  line-height: 1.55;
  margin-bottom: 18px;
}

.empty-state-formats {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 22px;
}

.format-chip {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10.5px;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--text-dim);
}

.format-chip--accent {
  background: rgba(233, 69, 96, 0.12);
  border-color: rgba(233, 69, 96, 0.32);
  color: #ffd7de;
}

.empty-state-cta {
  height: 38px;
  padding: 0 22px;
  border-radius: 10px;
  border: 1px solid rgba(78,205,196,0.42);
  background:
    linear-gradient(180deg, rgba(78,205,196,0.22), rgba(78,205,196,0.08)),
    rgba(14, 20, 35, 0.6);
  color: #ffffff;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.08),
    0 10px 22px rgba(0,0,0,0.28);
}

.empty-state-cta:hover {
  transform: translateY(-1px);
  border-color: rgba(78,205,196,0.7);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.12),
    0 14px 28px rgba(0,0,0,0.34);
}

.empty-state-cta:active {
  transform: translateY(0);
}

/* ── Loading overlay ─────────────────────── */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(22, 33, 62, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 50;
}
.loading-overlay.hidden { display: none; }

.spinner {
  width: 36px; height: 36px;
  border: 3px solid rgba(78,205,196,0.2);
  border-top-color: var(--accent2);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

#loading-text { color: var(--text-dim); font-size: 13px; }

/* ── Info panel ───────────────────────────── */
.info-panel {
  position: absolute;
  top: 10px; right: 10px;
  width: 220px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  z-index: 30;
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}
.info-panel.hidden { display: none; }

.info-close {
  position: absolute;
  top: 8px; right: 10px;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  padding: 2px 4px;
}
.info-close:hover { color: var(--text); }

.info-name {
  font-weight: 700;
  font-size: 13px;
  color: var(--accent2);
  margin-bottom: 10px;
  padding-right: 20px;
  word-break: break-all;
}

.info-rows { display: flex; flex-direction: column; gap: 5px; }
.info-row {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  font-size: 11px;
}
.info-row .lbl { color: var(--text-dim); }
.info-row .val { color: var(--text); text-align: right; word-break: break-all; }

/* ── Status bar ───────────────────────────── */
#status-bar {
  position: absolute;
  bottom: 6px; left: 8px;
  display: flex;
  gap: 14px;
  font-size: 11px;
  color: var(--text-dim);
  pointer-events: none;
}

/* ── Tooltip flash ────────────────────────── */
#toast {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.75);
  color: var(--text);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 12px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s;
  z-index: 60;
  white-space: nowrap;
}
#toast.show { opacity: 1; }