.spv-container {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #1a1a2e;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.spv-container:fullscreen {
  height: 100vh !important;
  border-radius: 0;
}

/* Toolbar */
.spv-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: #16213e;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
  flex-wrap: wrap;
  z-index: 10;
  user-select: none;
}

.spv-toolbar-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.spv-toolbar-group + .spv-toolbar-group {
  padding-left: 8px;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.spv-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: #a8b2d1;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.spv-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #e6f1ff;
}

.spv-btn:active {
  background: rgba(255, 255, 255, 0.2);
  color: #e6f1ff;
}

.spv-btn svg {
  display: block;
}

/* Page info */
.spv-page-info {
  display: flex;
  align-items: center;
  gap: 4px;
  color: #a8b2d1;
  font-size: 13px;
  white-space: nowrap;
}

.spv-page-input {
  width: 48px;
  padding: 4px 6px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  color: #e6f1ff;
  font-size: 13px;
  text-align: center;
  -moz-appearance: textfield;
}

.spv-page-input::-webkit-outer-spin-button,
.spv-page-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.spv-page-input:focus {
  outline: none;
  border-color: #64ffda;
}

.spv-page-total {
  color: #8892b0;
}

/* Zoom label */
.spv-zoom-level {
  color: #a8b2d1;
  font-size: 12px;
  min-width: 40px;
  text-align: center;
}

/* Viewport */
.spv-viewport {
  flex: 1;
  overflow: auto;
  background: #0a0a23;
  position: relative;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  touch-action: pan-x pan-y;
}

.spv-pages-wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  min-height: 100%;
}

/* Single page */
.spv-page {
  position: relative;
  background: #fff;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
  border-radius: 2px;
  flex-shrink: 0;
  margin-left: auto;
  margin-right: auto;
}

.spv-page canvas {
  display: block;
  border-radius: 2px;
}

.spv-page-label {
  position: absolute;
  bottom: 4px;
  right: 8px;
  font-size: 11px;
  color: #999;
  background: rgba(255, 255, 255, 0.85);
  padding: 1px 6px;
  border-radius: 3px;
  pointer-events: none;
}

/* Loading overlay */
.spv-loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: rgba(10, 10, 35, 0.92);
  z-index: 20;
  color: #a8b2d1;
  font-size: 14px;
}

.spv-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: #64ffda;
  border-radius: 50%;
  animation: spv-spin 0.8s linear infinite;
}

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

/* Progress bar */
.spv-progress-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 60%;
  max-width: 280px;
}

.spv-progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.spv-progress-fill {
  height: 100%;
  width: 0%;
  background: #64ffda;
  border-radius: 3px;
  transition: width 0.2s ease;
}

.spv-progress-text {
  font-size: 12px;
  color: #8892b0;
  white-space: nowrap;
}

/* Scrollbar — desktop */
.spv-viewport::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.spv-viewport::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.03);
}

.spv-viewport::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 4px;
}

.spv-viewport::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   TABLET — max 768px
========================================================================== */

@media (max-width: 768px) {
  .spv-container {
    border-radius: 0;
  }

  .spv-toolbar {
    padding: 6px 8px;
    gap: 2px;
    justify-content: center;
  }

  .spv-toolbar-group {
    gap: 2px;
  }

  .spv-toolbar-group + .spv-toolbar-group {
    padding-left: 6px;
    border-left-color: rgba(255, 255, 255, 0.08);
  }

  .spv-btn {
    width: 38px;
    height: 38px;
    border-radius: 8px;
  }

  .spv-zoom-level {
    min-width: 36px;
    font-size: 11px;
  }

  .spv-pages-wrapper {
    gap: 8px;
    padding: 8px 0;
  }
}

/* ==========================================================================
   MOBILE — max 480px
========================================================================== */

@media (max-width: 480px) {
  .spv-toolbar {
    padding: 4px 4px;
    gap: 1px;
  }

  .spv-toolbar-group + .spv-toolbar-group {
    padding-left: 4px;
  }

  .spv-btn {
    width: 36px;
    height: 36px;
  }

  .spv-btn svg {
    width: 16px;
    height: 16px;
  }

  .spv-page-info {
    font-size: 12px;
    gap: 2px;
  }

  .spv-page-input {
    width: 36px;
    padding: 3px 4px;
    font-size: 12px;
  }

  .spv-zoom-level {
    display: none;
  }

  .spv-page-label {
    font-size: 10px;
    padding: 0 4px;
    bottom: 2px;
    right: 4px;
  }

  .spv-pages-wrapper {
    gap: 6px;
    padding: 4px 0;
  }
}

/* ==========================================================================
   SMALL MOBILE — max 360px
========================================================================== */

@media (max-width: 360px) {
  .spv-toolbar-group + .spv-toolbar-group {
    padding-left: 2px;
    border-left: none;
  }

  .spv-btn {
    width: 32px;
    height: 32px;
  }

  .spv-btn svg {
    width: 14px;
    height: 14px;
  }

  .spv-page-input {
    width: 32px;
    padding: 2px;
    font-size: 11px;
  }
}