/* ── Header ── */
header {
  background: var(--bg-primary);
  border-bottom: 0.5px solid var(--border-light);
  padding: 0 20px;
  display: flex;
  align-items: center;
  height: 52px;
  gap: 16px;
}

.logo {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.3px;
  display: flex;
  align-items: center;
  gap: 7px;
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: #1b2fe7;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Toolbar ── */
#toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--bg-primary);
  border-bottom: 0.5px solid var(--border-light);
  flex-wrap: wrap;
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 5px;
}

.sep {
  width: 0.5px;
  height: 22px;
  background: var(--border-light);
  margin: 0 6px;
}

.tool-btn {
  padding: 5px 11px;
  font-size: 13px;
  font-family: var(--font);
  border-radius: var(--radius-md);
  border: 0.5px solid var(--border-medium);
  cursor: pointer;
  background: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 5px;
  transition:
    background 0.12s,
    opacity 0.12s;
  white-space: nowrap;
}

.tool-btn:hover {
  background: var(--bg-secondary);
}
.tool-btn:active {
  transform: scale(0.98);
}
.tool-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.tool-btn.active {
  background: var(--bg-secondary);
  border-color: var(--border-medium);
  font-weight: 500;
}

.tool-btn.danger {
  color: var(--text-danger);
  border-color: var(--border-danger);
}
.tool-btn.danger:hover {
  background: var(--bg-danger);
}

.tool-btn.primary {
  background: linear-gradient(135deg, #1b2fe7 0%, #1a8de7 50%, #07c4e8 100%);
  color: #fff;
  border: none;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}
.tool-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 107, 0.5);
  opacity: 1;
}
.tool-btn.primary:disabled {
  opacity: 0.5;
}

.spacer {
  flex: 1;
}

select {
  padding: 5px 8px;
  font-size: 13px;
  font-family: var(--font);
  border-radius: var(--radius-md);
  border: 0.5px solid var(--border-medium);
  cursor: pointer;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.redact-count-badge {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--bg-danger);
  color: var(--text-danger);
  font-weight: 500;
  border: 0.5px solid var(--border-danger);
}

/* ── Main canvas area ── */
#canvas-area {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  background: var(--bg-tertiary);
  overflow: auto;
  padding: 32px 24px;
  min-height: 400px;
}

/* ── Drop zone ── */
#drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 520px;
  min-height: 380px;
  border: 1.5px dashed var(--border-medium);
  border-radius: var(--radius-lg);
  text-align: center;
  padding: 48px 32px;
  cursor: pointer;
  transition:
    border-color 0.18s,
    background 0.18s;
  background: var(--bg-primary);
}

#drop-zone:hover,
#drop-zone.dragover {
  border-color: #555;
  background: var(--bg-secondary);
}

.drop-icon {
  margin-bottom: 18px;
  opacity: 0.7;
}

.drop-title {
  font-size: 17px;
  font-weight: 500;
  margin-bottom: 7px;
}

.drop-sub {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.drop-types {
  margin-top: 20px;
  font-size: 11px;
  color: var(--text-tertiary);
  padding: 5px 12px;
  border: 0.5px solid var(--border-light);
  border-radius: 999px;
  display: inline-block;
}

#upload-input {
  display: none;
}

/* ── PDF canvas wrapper ── */
#canvas-wrap {
  position: relative;
  display: none;
  box-shadow:
    0 2px 20px rgba(0, 0, 0, 0.13),
    0 0 0 0.5px rgba(0, 0, 0, 0.08);
  border-radius: 3px;
  overflow: hidden;
}

#pdf-canvas {
  display: block;
}

#overlay-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  pointer-events: all;
}

.redact-rect {
  fill: #111;
  cursor: pointer;
  transition: fill 0.1s;
}

.redact-rect:hover {
  fill: #333;
}

/* ── Status bar ── */
#status-bar {
  padding: 6px 20px;
  font-size: 12px;
  color: var(--text-secondary);
  border-top: 0.5px solid var(--border-light);
  background: var(--bg-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

#hint-msg {
  color: var(--text-tertiary);
}

/* ── Responsive ── */
@media (max-width: 600px) {
  #toolbar {
    gap: 5px;
    padding: 8px 12px;
  }
  .tool-btn {
    padding: 5px 8px;
    font-size: 12px;
  }
  #canvas-area {
    padding: 16px 8px;
  }
}

/* Full Screen Mode */
#pdfReaderApp.full-screen-mode {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 99999;
  background: var(--bg-primary, #ffffff);
  display: flex !important;
  flex-direction: column;
}

#pdfReaderApp.full-screen-mode #canvas-area {
  flex: 1;
  overflow: auto;
}

/* Spinner Overlay */
.spinner-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 14, 39, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.spinner-overlay[style*="display: flex"] {
  opacity: 1;
  pointer-events: all;
}

.spinner-content {
  text-align: center;
  color: white;
}

.spinner {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top-color: #ff6b6b;
  border-right-color: #4ecdc4;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.spinner-text {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}