.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 400px);
  min-height: 100vh;
}

.preview-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: clamp(16px, 2.4vw, 28px);
  gap: 18px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.topbar-title {
  display: grid;
  grid-template-columns: minmax(220px, auto) minmax(0, 1fr);
  align-items: center;
  gap: clamp(14px, 2vw, 24px);
  min-width: 0;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

h1 {
  color: var(--mission-text);
  font-size: clamp(1.65rem, 2.8vw, 3rem);
  line-height: 1;
}

h2 {
  color: var(--mission-text);
  font-size: 0.95rem;
}

.status-pill,
.status-link {
  min-width: 112px;
  min-height: 42px;
  padding: 0 13px;
  border-radius: var(--mission-radius);
  white-space: nowrap;
}

.status-pill {
  display: grid;
  place-items: center;
  border: 1px solid var(--mission-line);
  background: rgba(255, 255, 255, 0.045);
  color: var(--mission-muted);
  font-weight: 800;
}

.stage-wrap {
  position: relative;
  display: grid;
  flex: 0 1 auto;
  width: 100%;
  min-height: 320px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  place-items: center;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    #03070d;
  background-size: 46px 46px;
}

.stage-wrap::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background:
    radial-gradient(circle at 30% 18%, rgba(102, 208, 216, 0.14), transparent 28%),
    radial-gradient(circle at 80% 82%, rgba(245, 184, 65, 0.1), transparent 24%);
}

#previewCanvas {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
  aspect-ratio: 16 / 9;
  object-fit: contain;
}

#sourceVideo {
  display: none;
}

.transport {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 136px;
  align-items: center;
  gap: 12px;
  min-height: 54px;
}

.icon-button,
.section-header button,
.event-row button {
  border: 1px solid var(--mission-line);
  border-radius: var(--mission-radius);
  background: var(--mission-surface-strong);
  color: var(--mission-text);
  cursor: pointer;
  transition:
    border-color 140ms ease,
    transform 140ms ease,
    background 140ms ease;
}

.icon-button:hover,
.section-header button:hover,
.event-row button:hover {
  border-color: var(--mission-cyan);
  transform: translateY(-1px);
}

.icon-button {
  position: relative;
  width: 46px;
  height: 46px;
}

.play-symbol,
.pause-symbol {
  position: absolute;
  inset: 0;
  display: block;
}

.play-symbol::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  content: "";
  border-top: 9px solid transparent;
  border-bottom: 9px solid transparent;
  border-left: 14px solid var(--mission-text);
  transform: translate(-38%, -50%);
}

.pause-symbol::before,
.pause-symbol::after {
  position: absolute;
  top: 13px;
  width: 5px;
  height: 20px;
  border-radius: 2px;
  background: var(--mission-text);
  content: "";
}

.pause-symbol::before {
  left: 16px;
}

.pause-symbol::after {
  right: 16px;
}

#timeline {
  width: 100%;
  accent-color: var(--mission-gold);
}

.time-readout {
  color: var(--mission-muted);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.control-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-height: 100vh;
  padding: 18px;
  border-left: 1px solid var(--mission-line);
  background: rgba(5, 13, 24, 0.82);
  overflow-y: auto;
}

.panel-section {
  display: grid;
  gap: 12px;
  padding: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02)),
    var(--mission-surface);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.section-header button {
  min-height: 34px;
  padding: 0 12px;
  color: var(--mission-gold-strong);
  font-weight: 900;
}

.file-drop {
  position: relative;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 3px 12px;
  min-height: 72px;
  align-items: center;
  padding: 13px;
  border: 1px dashed rgba(150, 177, 205, 0.42);
  border-radius: var(--mission-radius);
  background: rgba(255, 255, 255, 0.035);
  cursor: pointer;
}

.file-drop::before {
  grid-row: 1 / span 2;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(102, 208, 216, 0.36);
  border-radius: 8px;
  background:
    linear-gradient(180deg, transparent 45%, var(--mission-cyan) 46% 54%, transparent 55%),
    linear-gradient(90deg, transparent 45%, var(--mission-cyan) 46% 54%, transparent 55%),
    rgba(102, 208, 216, 0.08);
  content: "";
}

.file-drop:hover {
  border-color: var(--mission-cyan);
}

.file-drop input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.file-drop span {
  color: var(--mission-text);
  font-weight: 900;
}

.file-drop small {
  color: var(--mission-muted);
  line-height: 1.35;
}

.sample-link {
  width: 100%;
  min-height: 38px;
  padding: 0 12px;
  font-size: 0.88rem;
}

.compact-link {
  width: auto;
  min-width: 64px;
  min-height: 32px;
  padding: 0 10px;
  font-size: 0.78rem;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.event-editor {
  display: grid;
  gap: 10px;
}

.event-row {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr) 40px;
  gap: 8px;
  align-items: end;
  padding: 10px;
  border: 1px solid var(--mission-line);
  border-radius: var(--mission-radius);
  background: rgba(255, 255, 255, 0.035);
}

.event-row button {
  min-height: 42px;
  color: var(--mission-red);
  font-weight: 900;
}

.primary-button,
.secondary-action {
  width: 100%;
  min-height: 46px;
}

.download-link {
  display: none;
  min-height: 42px;
  place-items: center;
  border: 1px solid var(--mission-line);
  border-radius: var(--mission-radius);
  color: var(--mission-gold-strong);
  text-decoration: none;
}

.download-link.is-ready {
  display: grid;
}

@media (max-width: 1120px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .control-panel {
    max-height: none;
    border-top: 1px solid var(--mission-line);
    border-left: 0;
  }
}

@media (max-width: 760px) {
  .preview-panel {
    min-height: 56vh;
    padding: 16px;
  }

  .stage-wrap {
    min-height: 0;
    width: calc(100vw - 48px);
    max-width: 100%;
  }

  .topbar,
  .topbar-title {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .mission-brand {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .mission-brand img {
    width: 48px;
    height: 48px;
  }

  .topbar-actions {
    width: calc(100vw - 48px);
    max-width: 100%;
    align-items: stretch;
    flex-direction: column;
  }

  .status-link,
  .status-pill {
    width: 100%;
    flex: none;
  }

  .transport {
    grid-template-columns: 46px minmax(0, 1fr);
  }

  .time-readout {
    grid-column: 1 / -1;
    text-align: left;
  }
}

@media (max-width: 560px) {
  .control-panel {
    padding: 14px;
  }

  .two-col,
  .event-row {
    grid-template-columns: 1fr;
  }
}