/* ===== CSS RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #6C5CE7;
  --primary-light: #A29BFE;
  --primary-dark: #5A4BD1;
  --accent: #00CEC9;
  --accent-light: #81ECEC;
  --success: #00B894;
  --warning: #FDCB6E;
  --danger: #E17055;
  --bg: #F8F9FF;
  --bg-card: #FFFFFF;
  --text: #2D3436;
  --text-light: #636E72;
  --text-muted: #B2BEC3;
  --border: #DFE6E9;
  --shadow: 0 4px 24px rgba(108, 92, 231, 0.10);
  --shadow-lg: 0 8px 40px rgba(108, 92, 231, 0.15);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== ANTI-COPY PROTECTIONS ===== */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

/* Allow selection only in file inputs */
input[type="file"], input[type="range"], select { -webkit-user-select: auto; user-select: auto; }

/* ===== LOADING SCREEN ===== */
.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding: 2rem;
}

.loading-logo {
  font-size: 4rem;
  animation: loadBounce 1.5s ease-in-out infinite;
}

@keyframes loadBounce {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-15px) scale(1.1); }
}

.loading-screen h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  margin-top: 1rem;
}

.loading-screen p {
  color: var(--text-light);
  margin-top: 0.5rem;
}

.loading-bar {
  width: 200px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-top: 1.5rem;
  overflow: hidden;
}

.loading-bar-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  animation: loadProgress 2s ease-in-out forwards;
}

@keyframes loadProgress {
  0% { width: 0%; }
  50% { width: 70%; }
  100% { width: 100%; }
}

/* ===== HEADER ===== */
.header {
  background: linear-gradient(135deg, var(--primary) 0%, #8B5CF6 50%, var(--accent) 100%);
  padding: 2rem 1.5rem 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 60%);
  animation: headerPulse 8s ease-in-out infinite;
}

@keyframes headerPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.logo { position: relative; z-index: 1; }

.logo h1 {
  font-size: 2.4rem;
  font-weight: 800;
  color: white;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.logo p {
  color: rgba(255,255,255,0.85);
  font-size: 1.05rem;
  margin-top: 0.4rem;
  font-weight: 400;
}

/* ===== MAIN CONTAINER ===== */
.container {
  max-width: 900px;
  margin: -1.5rem auto 2rem;
  padding: 0 1.5rem;
  position: relative;
  z-index: 2;
}

/* ===== DROP ZONE ===== */
.drop-zone {
  background: var(--bg-card);
  border: 2.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(108,92,231,0.03), rgba(0,206,201,0.03));
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(108,92,231,0.06), rgba(0,206,201,0.06));
}

.drop-zone-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  display: block;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.drop-zone h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.drop-zone p { color: var(--text-light); font-size: 0.95rem; }

.browse-buttons {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.drop-zone .browse-btn {
  display: inline-block;
  padding: 0.6rem 1.8rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.drop-zone .browse-btn:hover {
  background: var(--primary-dark);
  transform: scale(1.04);
}

.browse-btn-folder {
  background: transparent !important;
  color: var(--primary) !important;
  border: 2px solid var(--primary) !important;
}

.browse-btn-folder:hover {
  background: var(--primary) !important;
  color: white !important;
}

.drop-zone .formats-hint {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

#fileInput, #folderInput { display: none; }

/* ===== OPTIONS BAR ===== */
.options-bar {
  display: none;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  margin-top: 1rem;
  box-shadow: var(--shadow);
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
}

.options-bar.visible { display: flex; }

.option-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.option-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
  white-space: nowrap;
}

.quality-slider {
  -webkit-appearance: none;
  width: 120px;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
}

.quality-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(108,92,231,0.3);
}

.quality-value {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  min-width: 35px;
}

.format-select {
  padding: 0.4rem 0.8rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  background: white;
  cursor: pointer;
  transition: var(--transition);
}

.format-select:focus { border-color: var(--primary); outline: none; }

.action-buttons { display: flex; gap: 0.5rem; }

.btn {
  padding: 0.5rem 1.2rem;
  border: none;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #00A382; }
.btn-danger { background: transparent; color: var(--danger); border: 2px solid var(--danger); }
.btn-danger:hover { background: var(--danger); color: white; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ===== FILE LIST ===== */
.file-list {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.file-item {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.file-item:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); }

.file-thumb {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xs);
  object-fit: cover;
  background: var(--bg);
  flex-shrink: 0;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid var(--border);
}

.file-thumb:hover { border-color: var(--primary); transform: scale(1.05); }

.file-info { flex: 1; min-width: 0; }

.file-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.25rem;
  font-size: 0.8rem;
  color: var(--text-light);
}

.file-size-original { color: var(--text-muted); }
.file-size-compressed { color: var(--success); font-weight: 700; }

.file-savings {
  padding: 0.15rem 0.5rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
}

.file-savings.good { background: rgba(0,184,148,0.1); color: var(--success); }
.file-savings.great { background: rgba(0,184,148,0.15); color: #009975; }

.file-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 0 3px 0 0;
  transition: width 0.4s ease;
}

.file-actions { display: flex; gap: 0.4rem; flex-shrink: 0; }

.file-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
  background: var(--bg);
  color: var(--text-light);
}

.file-btn:hover { background: var(--primary); color: white; }
.file-btn.delete:hover { background: var(--danger); color: white; }

.file-status { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; }
.file-status.compressing { color: var(--primary); }
.file-status.done { color: var(--success); }
.file-status.error { color: var(--danger); }

/* ===== SUMMARY BAR ===== */
.summary-bar {
  display: none;
  background: linear-gradient(135deg, var(--primary) 0%, #8B5CF6 100%);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-top: 1rem;
  color: white;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
}

.summary-bar.visible { display: flex; }

.summary-stat { text-align: center; }
.summary-stat .value { font-size: 1.5rem; font-weight: 800; }
.summary-stat .label { font-size: 0.75rem; opacity: 0.85; text-transform: uppercase; letter-spacing: 0.5px; }
.summary-divider { width: 1px; height: 40px; background: rgba(255,255,255,0.2); }

/* ===== COMPARISON MODAL ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  backdrop-filter: blur(4px);
}

.modal-overlay.visible { display: flex; }

.modal {
  background: var(--bg-card);
  border-radius: var(--radius);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 1.1rem; font-weight: 700; }

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--bg);
  color: var(--text-light);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover { background: var(--danger); color: white; }

.comparison-container {
  position: relative;
  overflow: hidden;
  cursor: col-resize;
  background: repeating-conic-gradient(#e0e0e0 0% 25%, white 0% 50%) 50% / 16px 16px;
}

.comparison-container img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 65vh;
  object-fit: contain;
}

.comparison-original {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.comparison-original img { width: 100%; height: 100%; object-fit: contain; }

.comparison-slider {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background: white;
  box-shadow: 0 0 8px rgba(0,0,0,0.4);
  z-index: 10;
  cursor: col-resize;
}

.comparison-slider::after {
  content: '\25C0 \25B6';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: white;
  padding: 0.4rem 0.6rem;
  border-radius: 50px;
  font-size: 0.65rem;
  color: var(--text-light);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  white-space: nowrap;
  letter-spacing: 2px;
}

.comparison-labels {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  font-size: 0.85rem;
  color: var(--text-light);
  border-top: 1px solid var(--border);
}

.comparison-labels span { font-weight: 600; }
.comparison-labels .size { color: var(--text-muted); }

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ===== WATERMARK ===== */
.watermark {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.65rem;
  color: rgba(108,92,231,0.15);
  padding: 0.5rem;
  pointer-events: none;
  z-index: 9999;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
}

/* ===== SPINNER ===== */
@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2.5px solid rgba(108,92,231,0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ===== TOAST ===== */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: white;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
  max-width: 320px;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--primary); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; }
  to { opacity: 0; transform: translateY(-10px); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  .logo h1 { font-size: 1.8rem; }
  .drop-zone { padding: 2rem 1.25rem; }
  .options-bar { flex-direction: column; align-items: stretch; }
  .file-item { flex-wrap: wrap; }
  .file-meta { flex-wrap: wrap; }
  .summary-bar { flex-direction: column; gap: 0.75rem; }
  .summary-divider { width: 60px; height: 1px; }
}

/* ===== ANTI-DEVTOOLS OVERLAY ===== */
.devtools-warning {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 99999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
  padding: 2rem;
}

.devtools-warning.visible { display: flex; }

.devtools-warning h2 {
  font-size: 1.5rem;
  color: var(--danger);
  margin-top: 1rem;
}

.devtools-warning p {
  color: var(--text-light);
  margin-top: 0.5rem;
  max-width: 400px;
}