.grid-page {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

.grid-top-bar {
  height: 48px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  flex-shrink: 0;
}

/* Viewport clips to one page */
.grid-viewport {
  flex: 1;
  overflow: hidden;
  position: relative;
  min-height: 0;
}

/* Horizontal strip holds all 3 pages side by side */
.grid-strip {
  display: flex;
  width: 300%;
  height: 100%;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.grid-strip.no-transition { transition: none; }

/* Each page is a 2x2 grid */
.grid-page-frame {
  flex: 0 0 calc(100% / 3);
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: var(--space-2);
  padding: var(--space-1);
  background: var(--grid-bg);
}

/* ═══════════════════════════════════════
   SLOT
   ═══════════════════════════════════════ */
.slot {
  position: relative;
  background: var(--bg-primary);
  border-radius: 8px;
  overflow: hidden;
  border: 1.5px solid var(--border-default);
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s, box-shadow 0.2s;
  cursor: pointer;
}
.slot:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,0.12), 0 0 0 2px var(--accent);
  border-color: var(--accent);
  z-index: 5;
}
.slot.attention {
  border-color: var(--red);
}

/* ── Slot header ── */
.slot-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-default);
  flex-shrink: 0;
  min-height: 32px;
}
.slot-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.slot-dot.running { background: var(--green); }
.slot-dot.starting { background: var(--text-muted); animation: pulse 1.5s ease-in-out infinite; }
.slot-dot.off { background: var(--border-focus); }
.slot-dot.alert { background: var(--red); }
.slot-dot.alert-pulse { background: var(--red); animation: pulse 1.5s ease-in-out infinite; }
.slot-dot.autopilot { background: var(--amber); }

.slot-name {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.slot-name.muted { color: var(--text-muted); font-weight: 500; }

.slot-finish-btn {
  padding: 2px 8px;
  font-size: 9px;
  font-weight: 600;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  background: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
  flex-shrink: 0;
}
.slot-finish-btn:hover { background: var(--accent); color: #fff; }

.slot-hdr-btn {
  width: 22px;
  height: 22px;
  border: none;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  flex-shrink: 0;
}
.slot-hdr-btn:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.slot-hdr-btn .material-icons-outlined { font-size: 14px; }

.slot-badge {
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 3px;
  flex-shrink: 0;
  background: rgba(245,158,11,0.1);
  color: var(--amber);
  border: 1px solid rgba(245,158,11,0.2);
  letter-spacing: 0.03em;
}

/* ── Slot body ── */
.slot-body {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}
.slot-idle {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
}

/* Loading */
.slot-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.spinner.static {
  border-color: rgba(220,38,38,0.15);
  border-top-color: var(--red);
  animation: none;
}
.loading-text {
  margin-top: 8px;
  font-size: 10px;
  font-weight: 500;
  color: var(--text-secondary);
}
.loading-text.alert { color: var(--red); }
.loading-sub {
  font-size: 9px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Connection state overrides */
.slot.is-loading .slot-loading {
  display: flex;
}

.slot.is-connecting .slot-loading {
  display: flex;
  background: rgba(255, 255, 255, 1);
}

.slot.is-connection-error .slot-loading {
  display: flex;
  background: rgba(255, 255, 255, 1);
}

.slot.is-connection-error .spinner {
  border-color: rgba(220,38,38,0.15);
  border-top-color: var(--red);
  animation: none;
}

.slot.is-connection-error .loading-text {
  color: var(--red);
}

/* Paused */
.slot-paused {
  position: absolute;
  inset: 0;
  background: rgba(250,249,247,0.8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
}
.slot-paused .material-icons-outlined {
  font-size: 32px;
  color: var(--border-focus);
  margin-bottom: 2px;
}
.slot-paused-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ═══════════════════════════════════════
   UNIFIED OVERLAY
   ═══════════════════════════════════════ */
.slot-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  padding: 8px 10px;
  z-index: 10;
}
.overlay-label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--red);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.overlay-label .material-icons-outlined { font-size: 12px; }
.overlay-label .timer { margin-left: auto; font-weight: 500; color: var(--text-muted); }
.overlay-brief {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
  line-height: 1.35;
}
.overlay-detail {
  font-size: 9px;
  color: var(--text-secondary);
  line-height: 1.45;
  flex: 1;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}
.overlay-buttons { display: flex; gap: 4px; margin-top: 6px; }
.o-btn {
  flex: 1;
  font-size: 9px;
  font-weight: 600;
  padding: 5px 4px;
  border-radius: 5px;
  border: 1.5px solid;
  cursor: pointer;
  text-align: center;
  font-family: var(--font-sans);
  transition: all 0.15s;
}
.o-btn:hover { transform: translateY(-1px); }
.o-btn.fail {
  background: rgba(220,38,38,0.05);
  color: var(--red);
  border-color: rgba(220,38,38,0.2);
}
.o-btn.fail:hover {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
  box-shadow: 0 2px 8px rgba(220,38,38,0.25);
}
.o-btn.pass {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-default);
}
.o-btn.pass:hover {
  background: var(--bg-primary);
  border-color: var(--border-focus);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.o-btn.review {
  background: var(--text-primary);
  color: #fff;
  border-color: var(--text-primary);
}
.o-btn.review:hover {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(179,0,0,0.2);
}

/* Hide overlay pointer events on empty slots */
.slot:not(.has-task) .slot-overlay {
  pointer-events: none;
  cursor: default;
}

/* ═══════════════════════════════════════
   SLOT STRIP
   ═══════════════════════════════════════ */
.slotstrip {
  flex-shrink: 0;
  padding: 8px 16px 10px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-default);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}
.slotstrip-slots { display: flex; gap: 6px; }
.ss {
  width: 34px;
  height: 20px;
  border-radius: 5px;
  border: 1.5px solid var(--border-default);
  background: var(--bg-tertiary);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s ease;
}
.ss:hover {
  border-color: var(--text-muted);
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}
.ss.on { border-color: var(--green); background: rgba(34,197,94,0.04); }
.ss.on::after { content:''; position:absolute; bottom:0;left:0;right:0; height:2px; background:var(--green); }
.ss.on .ss-n { color: var(--green); }
.ss.autopilot { border-color: var(--amber); background: rgba(245,158,11,0.04); }
.ss.autopilot::after { content:''; position:absolute; bottom:0;left:0;right:0; height:2px; background:var(--amber); }
.ss.autopilot .ss-n { color: var(--amber); }
.ss.starting { border-color: var(--border-focus); }
.ss.starting::after {
  content:'';
  position:absolute;
  bottom:0;
  left:0;
  height:2px;
  background:var(--text-muted);
  animation: ssload 1.5s ease-in-out infinite;
}
@keyframes ssload { 0%{width:0;left:0} 50%{width:100%;left:0} 100%{width:0;left:100%} }
.ss.attn { border-color: var(--red); background: rgba(220,38,38,0.04); }
.ss.attn::after { content:''; position:absolute; bottom:0;left:0;right:0; height:2px; background:var(--red); }
.ss.attn .ss-n { color: var(--red); }
.ss.paused { opacity: 0.4; }
.ss.viewing { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.ss-n {
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-mono);
  font-size:9px;
  font-weight:600;
  color:var(--text-muted);
}
.slotstrip-summary {
  font-size: 10px;
  color: var(--text-muted);
  font-weight: 500;
}

/* During slide: hide iframe content to prevent flicker */
.grid-viewport.is-transitioning .slot iframe,
.grid-viewport.is-transitioning .slot-iframe-placeholder {
  visibility: hidden;
}

.slot-iframe-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* ── Mobile: single-column grid pages ─────────── */
@media (max-width: 768px) {
  .grid-page-frame {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
  }
  .slotstrip {
    padding: 6px 8px 8px;
  }
  .slotstrip-slots {
    gap: 4px;
    flex-wrap: wrap;
    justify-content: center;
  }
  .ss {
    width: 28px;
    height: 20px;
  }
  .slotstrip-summary {
    font-size: 10px;
  }
  .grid-top-bar {
    padding: 0 var(--space-2);
    height: 40px;
  }
  .slot-hdr-btn {
    width: 44px;
    height: 44px;
  }
  .slot-finish-btn {
    padding: 8px 16px;
    min-height: 36px;
    font-size: 11px;
  }
  .o-btn {
    padding: 10px 8px;
    font-size: 11px;
    min-height: 40px;
  }
}