.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(900px 520px at 8% -20%, rgba(94, 234, 212, 0.12), transparent 52%),
    radial-gradient(700px 480px at 108% 8%, rgba(167, 139, 250, 0.14), transparent 48%),
    radial-gradient(640px 420px at 70% 120%, rgba(125, 211, 252, 0.1), transparent 48%),
    var(--bg);
}

.aurora {
  position: absolute;
  width: 58vmax;
  height: 58vmax;
  left: 28%;
  top: -28%;
  background: conic-gradient(from 140deg, rgba(94, 234, 212, 0.12), rgba(125, 211, 252, 0.08), rgba(167, 139, 250, 0.14), transparent 68%);
  filter: blur(48px);
  animation: drift 22s var(--ease) infinite alternate;
}

.grain {
  position: absolute;
  inset: -20%;
  opacity: 0.14;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

.app {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  height: 100%;
  min-height: 0;
}

.rail {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px 10px 10px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(160, 220, 255, 0.04), transparent 28%), var(--glass);
  backdrop-filter: blur(18px);
  min-height: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 2px 4px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  border-radius: 8px;
  object-fit: cover;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-copy strong {
  font-size: 1.05rem;
  letter-spacing: 0.12em;
  font-weight: 700;
}

.brand-copy span {
  color: var(--ink-mute);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.search {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(160, 220, 255, 0.04);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--ink-ui);
}

.search::placeholder {
  color: var(--ink-mute);
}

.btn {
  border: 0;
  border-radius: 999px;
  padding: 9px 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--ink-ui);
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-new {
  background: linear-gradient(135deg, var(--cyan), #67e8f9);
  color: #041016;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(94, 234, 212, 0.22);
}

.btn-ghost {
  color: var(--ink-dim);
  border: 1px solid var(--line);
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 10px;
  color: var(--ink-dim);
}

.btn-icon:hover {
  background: rgba(160, 220, 255, 0.08);
  color: var(--ink-ui);
}

.idea-list {
  list-style: none;
  margin: 0;
  padding: 2px 0;
  overflow: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.idea-item {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  border-radius: var(--radius-m);
  padding: 8px 10px 8px 12px;
  background: rgba(160, 220, 255, 0.03);
  display: grid;
  grid-template-columns: 8px minmax(0, 1fr);
  gap: 8px;
  align-items: start;
}

.idea-item:hover {
  background: rgba(160, 220, 255, 0.07);
}

.idea-item.is-active {
  border-color: var(--line-strong);
  background: rgba(160, 220, 255, 0.09);
}

.spark {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-top: 5px;
  color: var(--spark);
  background: var(--spark);
  box-shadow: 0 0 10px currentColor;
}

.idea-item strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.idea-item small {
  display: block;
  color: var(--ink-mute);
  font-size: 0.68rem;
  margin-top: 1px;
}

.empty-hint {
  color: var(--ink-mute);
  padding: 8px 8px 0;
  font-size: 0.82rem;
}

.rail-foot {
  display: flex;
  gap: 6px;
}

.rail-foot .btn {
  flex: 1;
  font-size: 0.75rem;
  padding: 7px 8px;
}

.back-lab {
  display: block;
  margin-top: 2px;
  padding: 4px 6px;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-decoration: none;
}

.back-lab:hover {
  color: var(--text);
}

.studio {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  padding: 8px 8px 8px 6px;
}

.studio-bar {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 6;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(8, 14, 24, 0.78);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 4px 2px 10px;
  backdrop-filter: blur(12px);
}

.menu-toggle {
  display: none;
}

.save-pill {
  color: var(--ink-mute);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.sheet-wrap {
  min-height: 0;
  overflow: hidden;
  padding: 0;
  display: flex;
  height: 100%;
}

.empty-studio {
  margin: auto;
  text-align: center;
  max-width: 420px;
  padding: 32px 16px;
}

.empty-studio h2 {
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 1.8rem;
  letter-spacing: 0.08em;
  margin: 0 0 8px;
}

.empty-studio p {
  color: var(--ink-dim);
  margin: 0 0 18px;
}

.dock {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 16px;
  display: flex;
  justify-content: center;
  pointer-events: none;
  z-index: 6;
}

.dock-inner {
  pointer-events: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  border-radius: 999px;
  background: rgba(8, 14, 24, 0.82);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-dock);
  backdrop-filter: blur(16px);
}

.dock .btn {
  background: rgba(160, 220, 255, 0.05);
  border: 1px solid var(--line);
  font-size: 0.82rem;
  padding: 8px 12px;
}

.dock .btn:hover {
  background: rgba(160, 220, 255, 0.12);
}

.hidden {
  display: none !important;
}

.modal-back {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: rgba(4, 8, 14, 0.62);
  display: grid;
  place-items: center;
  padding: 16px;
}

.modal {
  width: min(400px, 100%);
  background: var(--bg-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
  padding: 18px;
}

.modal h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.modal p {
  margin: 0 0 16px;
  color: var(--ink-dim);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.btn-danger {
  background: var(--danger);
  color: #1a0610;
  font-weight: 700;
}

.drop-veil {
  position: absolute;
  inset: 8px;
  z-index: 8;
  border: 2px dashed rgba(94, 234, 212, 0.55);
  border-radius: var(--radius-l);
  background: rgba(6, 9, 16, 0.55);
  display: grid;
  place-items: center;
  font-size: 1rem;
  font-weight: 700;
}

@media (max-width: 860px) {
  .app {
    grid-template-columns: 1fr;
  }

  .rail {
    position: fixed;
    z-index: 12;
    inset: 0 auto 0 0;
    width: min(88vw, 300px);
    transform: translateX(-105%);
    transition: transform 0.28s var(--ease);
  }

  .rail.is-open {
    transform: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .studio {
    padding: 6px;
  }
}