:root {
  --bg-main: #0f1117;
  --bg-card: #181c27;
  --bg-input: #212634;
  --border-color: #2e3649;
  --border-hover: #434e68;
  --yt-red: #ff0000;
  --yt-red-hover: #e60000;
  --yt-red-light: rgba(255, 0, 0, 0.12);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #38bdf8;
  --accent-green: #22c55e;
  --accent-amber: #f59e0b;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  min-height: 100vh;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.container {
  width: 100%;
  max-width: 1240px;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 28px;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--yt-red-light);
  color: #ff4e4e;
  border: 1px solid rgba(255, 0, 0, 0.25);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.badge-tag.badge-dynamic {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-blue);
  border-color: rgba(56, 189, 248, 0.3);
}

.badge-tag.badge-edited {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border-color: rgba(245, 158, 11, 0.3);
}

.header h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.header h1 .yt-icon {
  fill: var(--yt-red);
}

.header p {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 650px;
  margin: 0 auto;
}

/* Grid Layout */
.app-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 960px) {
  .app-grid {
    grid-template-columns: 1fr;
  }
}

/* Card */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.card-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
}

.card-title svg {
  color: var(--yt-red);
}

/* Form Controls */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-with-actions {
  display: flex;
  gap: 8px;
}

.input-text {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
}

.input-text:focus {
  border-color: var(--yt-red);
  box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.2);
}

.btn-secondary {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.btn-secondary:hover {
  border-color: var(--border-hover);
  background: #2a3142;
}

.quick-samples {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.sample-chip {
  background: rgba(255, 255, 255, 0.05);
  border: 1px dashed var(--border-color);
  color: var(--text-muted);
  font-size: 11px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.sample-chip:hover {
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

/* Timestamp Box */
.timestamp-box {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 20px;
}

.toggle-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.toggle-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.custom-checkbox {
  width: 18px;
  height: 18px;
  accent-color: var(--yt-red);
  cursor: pointer;
}

.timestamp-controls {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

.time-inputs-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}

.time-col label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-weight: 600;
}

.time-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  outline: none;
}

.time-input:focus {
  border-color: var(--yt-red);
}

.time-chips-row {
  display: flex;
  gap: 6px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.time-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.time-btn:hover {
  background: var(--yt-red-light);
  color: #ff4e4e;
  border-color: rgba(255, 0, 0, 0.3);
}

.timestamp-hint {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Customization Accordion */
.customization-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

@media (max-width: 600px) {
  .customization-section {
    grid-template-columns: 1fr;
  }
}

.custom-option {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
}

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
}

.color-swatch-input {
  -webkit-appearance: none;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  background: none;
}

.color-swatch-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-swatch-input::-webkit-color-swatch {
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

.select-dropdown {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  cursor: pointer;
  margin-top: 6px;
}

/* Right Column - Preview & Actions */
.preview-card {
  text-align: center;
  position: sticky;
  top: 24px;
}

.qr-canvas-wrapper {
  background: #ffffff;
  padding: 20px;
  border-radius: var(--radius-md);
  display: inline-block;
  margin: 0 auto 16px auto;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
  position: relative;
  transition: var(--transition);
  max-width: 100%;
}

.qr-canvas-wrapper.transparent-bg {
  background: repeating-conic-gradient(#333 0% 25%, #222 0% 50%) 50% / 16px 16px;
}

#qr-display {
  display: flex;
  justify-content: center;
  align-items: center;
  min-width: 256px;
  min-height: 256px;
}

#qr-display canvas, #qr-display img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Dynamic URL Pill & Live Editor */
.url-preview-pill {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 16px;
  text-align: left;
}

.url-preview-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 rgba(34, 197, 94, 0.4);
  animation: pulseAnimation 2s infinite;
}

@keyframes pulseAnimation {
  0% {
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(34, 197, 94, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0);
  }
}

.target-url-textarea {
  width: 100%;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: var(--accent-blue);
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
  font-size: 13px;
  line-height: 1.5;
  outline: none;
  resize: vertical;
  min-height: 62px;
  transition: var(--transition);
}

.target-url-textarea:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.25);
  background: rgba(0, 0, 0, 0.6);
}

.url-tools-row {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.btn-micro {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 500;
  padding: 4px 9px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.btn-micro:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-hover);
}

.btn-micro.active {
  background: var(--yt-red-light);
  color: #ff4e4e;
  border-color: rgba(255, 0, 0, 0.3);
}

/* Video Info Box */
.video-preview-box {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  margin-bottom: 20px;
  display: flex;
  gap: 12px;
  align-items: center;
  text-align: left;
}

.video-thumb {
  width: 90px;
  height: 52px;
  border-radius: 6px;
  object-fit: cover;
  background: #000;
  border: 1px solid var(--border-color);
}

.video-meta {
  flex: 1;
  overflow: hidden;
}

.video-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.video-time-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  background: var(--yt-red-light);
  color: #ff4e4e;
  padding: 2px 6px;
  border-radius: 4px;
  margin-top: 4px;
  font-weight: 600;
}

/* Action Buttons */
.action-buttons-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-primary {
  background: var(--yt-red);
  color: white;
  border: none;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(255, 0, 0, 0.4);
}

.btn-primary:hover {
  background: var(--yt-red-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 0, 0, 0.5);
}

.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.btn-glass {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: var(--transition);
}

.btn-glass:hover {
  border-color: var(--border-hover);
  background: #2a3142;
}

.btn-glass svg {
  color: var(--text-secondary);
}

/* Saved Presets / History */
.saved-list-card {
  margin-top: 24px;
}

.saved-items-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 240px;
  overflow-y: auto;
  margin-top: 12px;
}

.saved-item {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  transition: var(--transition);
}

.saved-item:hover {
  border-color: var(--border-hover);
}

.saved-item-info {
  flex: 1;
  overflow: hidden;
  text-align: left;
}

.saved-item-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.saved-item-url {
  font-size: 11px;
  color: var(--accent-blue);
  font-family: monospace;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.saved-item-actions {
  display: flex;
  gap: 6px;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1e293b;
  color: white;
  border: 1px solid var(--border-color);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 9999;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast svg {
  color: var(--accent-green);
}

/* Dynamic QR explanation badge */
.dynamic-info-banner {
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-top: 14px;
  font-size: 12px;
  color: #bae6fd;
  line-height: 1.4;
}

/* Footer note */
.footer-info {
  margin-top: 32px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

/* Security Passcode Modal (Client-side) */
.security-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 17, 23, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100000;
  padding: 16px;
  transition: var(--transition);
}

.security-modal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.security-modal-box {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  text-align: center;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  animation: modalPop 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modalPop {
  from {
    transform: scale(0.92);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.top-user-bar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  width: 100%;
}

.user-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-secondary);
}

.logout-btn-header {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: var(--transition);
}

.logout-btn-header:hover {
  background: #ef4444;
  color: white;
}

/* Big Generate QR Button */
.btn-generate-main {
  width: 100%;
  background: linear-gradient(135deg, #ff0000 0%, #cc0000 100%);
  color: white;
  border: none;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.5px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
  margin-bottom: 24px;
  transition: var(--transition);
  box-shadow: 0 6px 20px rgba(255, 0, 0, 0.45);
}

.btn-generate-main:hover {
  background: linear-gradient(135deg, #ff2222 0%, #e60000 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 0, 0, 0.6);
}

.btn-generate-main:active {
  transform: translateY(0);
}

/* Mode Selection Cards */
.mode-toggle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

@media (max-width: 600px) {
  .mode-toggle-grid {
    grid-template-columns: 1fr;
  }
}

.mode-card {
  background: var(--bg-input);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 12px;
  cursor: pointer;
  transition: var(--transition);
  text-align: left;
  position: relative;
  user-select: none;
}

.mode-card:hover {
  border-color: var(--border-hover);
}

.mode-card.active {
  border-color: var(--accent-blue);
  background: rgba(56, 189, 248, 0.08);
}

.mode-card.active.dynamic-card {
  border-color: #38bdf8;
}

.mode-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.mode-card-sub {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.35;
}

.mode-radio {
  accent-color: var(--accent-blue);
}

/* Scan Count Badge */
.scan-count-badge {
  background: rgba(34, 197, 94, 0.15);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.3);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Dynamic Edit Modal */
.dynamic-edit-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 17, 23, 0.9);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 99999;
  padding: 16px;
}

.dynamic-edit-modal.hidden {
  display: none;
}

.dynamic-edit-box {
  width: 100%;
  max-width: 540px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
  animation: modalPop 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}

.modal-close-btn:hover {
  color: var(--text-primary);
}

/* Saved List Tabs */
.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.archived-item {
  border-color: rgba(239, 68, 68, 0.25) !important;
  background: rgba(239, 68, 68, 0.03) !important;
}

.archived-item:hover {
  border-color: rgba(239, 68, 68, 0.4) !important;
}