@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Outfit:wght@400;500;600;700;800;900&display=swap');

:root {
  --sidebar-w: 260px;
  --bg: #ffffff;
  --bg2: #f6f7f9;
  --bg3: #edeef2;
  --bg-canvas: #f0f1f5;
  --accent: #2563eb;
  --accent-light: #dbeafe;
  --accent-dim: #1d4ed8;
  --magenta: #d926a9;
  --mag-light: #fce7f3;
  --amber: #d97706;
  --amb-light: #fef3c7;
  --green: #059669;
  --grn-light: #d1fae5;
  --purple: #7c3aed;
  --purple-light: rgba(124,58,237,0.1);
  --text: #1a1d27;
  --text2: #374151;
  --muted: #6b7280;
  --border: #e5e7eb;
  --border2: #d1d5db;
  --panel: #f9fafb;
  --radius: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.05);
  --font: 'Outfit', system-ui, sans-serif;
  --mono: 'DM Mono', 'SF Mono', monospace;
}

/* Dashboard container — flex row, sticks below navbar, fills remaining viewport */
.threejs-app {
  display: flex;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  background: var(--bg);
}

/* Sidebar — flex child, scrolls independently */
.threejs-sidebar {
  background: var(--bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 800;
  font-size: 0.88rem;
  color: var(--text);
  letter-spacing: 0.04em;
  white-space: nowrap;
  font-family: var(--font);
}

.brand-accent { color: var(--accent); }

.menu-close {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
}

.threejs-app .nav-list {
  list-style: none;
  padding: 0.75rem 0;
  flex: 1;
  margin: 0;
}

.threejs-app .nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1.5rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 600;
  transition: all 0.15s;
  border-left: 3px solid transparent;
  font-family: var(--font);
}

.threejs-app .nav-link:hover {
  color: var(--text);
  background: var(--bg2);
}

.threejs-app .nav-link.active {
  color: var(--accent);
  background: var(--accent-light);
  border-left-color: var(--accent);
}

.nav-num {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--border2);
  font-family: var(--mono);
  min-width: 1.6rem;
}

.threejs-app .nav-link.active .nav-num { color: var(--accent); }

.sidebar-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
}

.sidebar-tag {
  font-size: 0.65rem;
  color: var(--green);
  background: var(--grn-light);
  border: 1px solid rgba(5,150,105,0.2);
  padding: 0.15rem 0.65rem;
  border-radius: 99px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

/* Main Content — flex child, scrolls independently */
.threejs-content {
  flex: 1;
  padding: 0.75rem 2.5rem 2rem;
  min-width: 0;
}

.threejs-content:has(.start-page:not([hidden])) {
  padding: 0;
}

/* Mobile hamburger */
.menu-toggle {
  display: none;
  position: absolute;
  top: 0.75rem;
  left: 1rem;
  z-index: 45;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
  box-shadow: var(--shadow-sm);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: all 0.2s;
}

/* Mobile overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 35;
}

.sidebar-overlay.visible { display: block; }

/* Responsive */
@media (max-width: 900px) {
  .threejs-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 40;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-lg);
  }

  .threejs-sidebar.open {
    transform: translateX(0);
  }

  .menu-close { display: block; }
  .menu-toggle { display: flex; }

  .threejs-content {
    padding: 1rem 1rem;
    padding-top: 3.5rem;
  }
}

/* Scrollbar (scoped) */
.threejs-sidebar::-webkit-scrollbar { width: 6px; }
.threejs-sidebar::-webkit-scrollbar-track { background: var(--bg2); }
.threejs-sidebar::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }