.gvw-app-container {
  --gvw-primary: #10b981;
  --gvw-primary-dark: #059669;
  --gvw-bg: #f8fafc;
  --gvw-card: #ffffff;
  --gvw-border: #e2e8f0;
  --gvw-text: #1f2937;
  --gvw-muted: #64748b;
  max-width: 1140px;
  margin: 20px auto;
  padding: 24px;
  border-radius: 16px;
  background: var(--gvw-card);
  box-shadow: 0 4px 20px rgba(15, 23, 42, .06);
  color: var(--gvw-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  box-sizing: border-box;
}
.gvw-app-container * { box-sizing: border-box; }
.gvw-loading { padding: 40px; text-align: center; color: var(--gvw-muted); }

/* --- DPS AUTH CARD (GSI SSO) --- */
.gvw-auth-card {
  max-width: 440px;
  margin: 40px auto;
  padding: 36px 32px 28px;
  text-align: center;
  border: 1px solid var(--gvw-border);
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}
.gvw-auth-icon { margin-bottom: 14px; }
.dps-brand-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: #10b981;
  text-transform: uppercase;
  background-color: #ecfdf5;
  padding: 4px 10px;
  border-radius: 4px;
}
.dps-modal-title {
  font-size: 21px;
  font-weight: 700;
  color: #111827;
  margin: 0 0 8px 0;
  line-height: 1.3;
}
.dps-modal-desc {
  font-size: 13.5px;
  color: #64748b;
  line-height: 1.5;
  margin: 0 0 24px 0;
}
.dps-modal-body { margin-bottom: 20px; }
.dps-modal-google-slot {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
}
.dps-btn-google-modal-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  max-width: 300px;
  height: 46px;
  padding: 0 20px;
  background-color: #ffffff;
  color: #3c4043;
  border: 1px solid #dadce0;
  border-radius: 24px;
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 500;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(60,64,67,0.12);
  transition: all 0.2s ease;
}
.dps-btn-google-modal-trigger:hover {
  background-color: #f8f9fa;
  border-color: #d2e3fc;
  box-shadow: 0 2px 6px rgba(60,64,67,0.2);
}
.dps-modal-footer {
  border-top: 1px solid #f1f5f9;
  padding-top: 16px;
}
.dps-modal-terms {
  font-size: 12px;
  color: #94a3b8;
  line-height: 1.5;
  margin: 0;
}

/* --- USER HEADER BAR & AVATAR --- */
.gvw-user-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-bottom: 16px;
  margin-bottom: 24px;
  border-bottom: 1px solid #f1f5f9;
  flex-wrap: wrap;
}
.gvw-user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}
.gvw-avatar-wrap {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  background: #f1f5f9;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.gvw-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.gvw-avatar-placeholder {
  color: #94a3b8;
}
.gvw-user-meta {
  display: flex;
  flex-direction: column;
}
.gvw-user-name {
  font-size: 14px;
  color: var(--gvw-text);
  font-weight: 700;
}
.gvw-user-email {
  font-size: 12px;
  color: var(--gvw-muted);
}
.gvw-user-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.gvw-security-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: #059669;
  background: #ecfdf5;
  padding: 4px 10px;
  border-radius: 99px;
  font-weight: 600;
}
.gvw-signout-btn {
  border: 1px solid #fee2e2;
  border-radius: 8px;
  padding: 6px 12px;
  background: #fff5f5;
  color: #dc2626;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  transition: all .2s ease;
}
.gvw-signout-btn:hover {
  background: #dc2626;
  color: #fff;
  border-color: #dc2626;
}

/* --- TOOL MAIN WORKSPACE --- */
.gvw-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 24px;
  align-items: start;
}
.gvw-panel {
  overflow: hidden;
  border: 1px solid var(--gvw-border);
  border-radius: 14px;
  background: var(--gvw-card);
  box-shadow: 0 1px 3px rgba(15, 23, 42, .04);
}
.gvw-panel + .gvw-panel { margin-top: 18px; }
.gvw-panel-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--gvw-border);
  background: #fcfcfd;
  font-size: 14px;
  font-weight: 700;
}
.gvw-compare-player {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 270px;
  background: #0f172a;
  gap: 1px;
}
.gvw-compare-pane {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-width: 0;
  background: #020617;
}
.gvw-compare-pane video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}
.gvw-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(15, 23, 42, .8);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}
.gvw-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  color: #cbd5e1;
  text-align: center;
  font-size: 13px;
  pointer-events: none;
}
.gvw-compare-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-top: 1px solid var(--gvw-border);
}
.gvw-play-toggle {
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--gvw-border);
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
}
.gvw-play-toggle::before { content: '▶'; font-size: 11px; }
.gvw-play-toggle[data-playing="true"]::before { content: 'Ⅱ'; }
.gvw-scrubber { flex: 1; accent-color: var(--gvw-primary); }
.gvw-time-label {
  min-width: 72px;
  color: var(--gvw-muted);
  font-size: 12px;
  text-align: right;
}
.gvw-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 34px 20px;
  border: 2px dashed #bbf7d0;
  border-radius: 14px;
  background: #f6fffb;
  text-align: center;
  cursor: pointer;
  transition: .2s ease;
}
.gvw-dropzone:hover, .gvw-dropzone[data-dragging="true"] {
  border-color: var(--gvw-primary);
  background: #ecfdf3;
}
.gvw-dropzone strong { font-size: 16px; }
.gvw-controls { padding: 16px; }
.gvw-auto-summary {
  margin-bottom: 14px;
  padding: 12px;
  border: 1px solid var(--gvw-border);
  border-radius: 10px;
  background: #f8fafc;
  font-size: 13px;
}
.gvw-auto-summary strong, .gvw-auto-summary span { display: block; }
.gvw-auto-summary span { margin-top: 4px; color: var(--gvw-muted); line-height: 1.4; }
.gvw-progress {
  height: 6px;
  overflow: hidden;
  margin-bottom: 14px;
  border-radius: 99px;
  background: #e2e8f0;
}
.gvw-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--gvw-primary);
  transition: width .2s ease;
}
.gvw-status {
  display: none;
  min-height: 38px;
  margin-bottom: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.4;
}
.gvw-status:not(:empty) { display: block; background: #f1f5f9; color: #475569; }
.gvw-status[data-tone="success"] { background: #ecfdf3; color: #047857; }
.gvw-status[data-tone="error"] { background: #fef2f2; color: #b91c1c; }
.gvw-status[data-tone="warn"] { background: #fffbeb; color: #b45309; }
.gvw-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.gvw-btn, .gvw-download-link {
  min-height: 40px;
  padding: 9px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 9px;
  background: #fff;
  color: var(--gvw-text);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.gvw-btn:hover, .gvw-download-link:hover:not([aria-disabled="true"]) {
  border-color: #94a3b8;
  background: #f8fafc;
}
.gvw-btn.gvw-primary {
  grid-column: span 2;
  border-color: var(--gvw-text);
  background: var(--gvw-text);
  color: #fff;
}
.gvw-btn.gvw-primary:hover { background: #0f172a; }
.gvw-download-link {
  grid-column: span 2;
  border-color: var(--gvw-primary);
  background: var(--gvw-primary);
  color: #fff;
}
.gvw-download-link[aria-disabled="true"] { opacity: .5; pointer-events: none; }
.gvw-note {
  padding: 14px 16px;
  border-top: 1px solid var(--gvw-border);
  color: var(--gvw-muted);
  font-size: 12px;
  line-height: 1.45;
}
.gvw-details dl { margin: 0; }
.gvw-details dl div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--gvw-border);
  font-size: 12px;
}
.gvw-details dt { color: var(--gvw-muted); }
.gvw-details dd { margin: 0; overflow-wrap: anywhere; }
.gvw-hidden, .gvw-internal-controls { display: none !important; }
@media (max-width: 860px) { .gvw-layout { grid-template-columns: 1fr; } }
@media (max-width: 560px) {
  .gvw-app-container { padding: 16px; }
  .gvw-compare-player { min-height: 220px; }
  .gvw-user-header { align-items: flex-start; flex-direction: column; }
}