:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --warning: #f59e0b;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --dark: #0f172a;
  --gray-900: #1e293b;
  --gray-700: #334155;
  --gray-500: #64748b;
  --gray-300: #cbd5e1;
  --gray-200: #e2e8f0;
  --gray-100: #f1f5f9;
  --gray-50: #f8fafc;
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--gray-100);
  color: var(--dark);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Navigation */
header {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-container {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-badge {
  background: linear-gradient(135deg, #f97316, #ea580c);
  color: white;
  font-weight: 900;
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  font-size: 1.2rem;
  letter-spacing: 1px;
}

.logo-title h1 {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
}

.logo-title p {
  font-size: 0.75rem;
  color: var(--gray-300);
}

/* Tabs */
.tabs-nav {
  display: flex;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.35rem;
  border-radius: 10px;
}

.tab-btn {
  background: transparent;
  color: var(--gray-300);
  border: none;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 7px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.12);
}

.tab-btn.active {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.4);
}

/* Quick Action Bar */
.quick-tools {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

/* Main Container */
main {
  flex: 1;
  max-width: 100%;
  width: 100%;
  margin: 0 auto;
  padding: 1rem 1.5rem;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Grid Layout for Tab 1: Studio 3-Column Workspace */
.workspace-grid {
  display: grid;
  grid-template-columns: 330px minmax(520px, 1fr) 380px;
  gap: 1.25rem;
  align-items: start;
}

.sidebar-left,
.sidebar-right {
  display: flex;
  flex-direction: column;
}

@media (max-width: 1440px) {
  .workspace-grid {
    grid-template-columns: 300px minmax(440px, 1fr) 350px;
    gap: 1rem;
  }
}

@media (max-width: 1150px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
  .canvas-card {
    position: static;
  }
}

/* Cards & Panels */
.card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.card-header {
  padding: 0.85rem 1.25rem;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-body {
  padding: 1.25rem;
}

/* Upload Dropzones */
.dropzone {
  border: 2px dashed var(--gray-300);
  border-radius: 8px;
  padding: 1.25rem 1rem;
  text-align: center;
  cursor: pointer;
  background: var(--gray-50);
  transition: all 0.2s ease;
  position: relative;
  margin-bottom: 0.85rem;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.dropzone input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.dropzone-icon {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

.dropzone-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
}

.dropzone-hint {
  font-size: 0.725rem;
  color: var(--gray-500);
  margin-top: 0.2rem;
}

.file-status {
  font-size: 0.8rem;
  color: var(--success);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.35rem;
}

/* Accordion Element Settings */
.element-accordion {
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  margin-bottom: 0.65rem;
  overflow: hidden;
}

.element-header {
  background: var(--gray-50);
  padding: 0.65rem 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  user-select: none;
}

.element-header:hover {
  background: var(--gray-100);
}

.element-header .title-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.element-body {
  padding: 0.85rem;
  background: var(--white);
  border-top: 1px solid var(--gray-200);
  display: none;
}

.element-accordion.open .element-body {
  display: block;
}

.element-accordion.open .element-header {
  border-bottom: 1px solid var(--gray-200);
  background: var(--primary-light);
  color: var(--primary);
}

/* Form Controls */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.form-group {
  margin-bottom: 0.5rem;
}

.form-group label {
  display: block;
  font-size: 0.725rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.2rem;
}

.form-control {
  width: 100%;
  padding: 0.4rem 0.5rem;
  font-size: 0.8rem;
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  outline: none;
  background: var(--white);
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  font-size: 0.825rem;
  font-weight: 600;
  border-radius: 7px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

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

.btn-success {
  background: var(--success);
  color: var(--white);
}
.btn-success:hover {
  background: #15803d;
}

.btn-danger {
  background: var(--danger);
  color: var(--white);
}
.btn-danger:hover {
  background: #b91c1c;
}

.btn-secondary {
  background: var(--white);
  color: var(--gray-700);
  border-color: var(--gray-300);
}
.btn-secondary:hover {
  background: var(--gray-100);
}

.btn-dark {
  background: var(--dark);
  color: var(--white);
}

.btn-sm {
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
}

.btn-block {
  width: 100%;
}

/* Canvas Viewport Area */
.canvas-card {
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 1rem;
}

.canvas-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}

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

.canvas-container {
  position: relative;
  overflow: auto;
  min-height: 500px;
  max-height: 760px;
  background: #334155;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

#bibCanvas {
  background: white;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
  border-radius: 4px;
  max-width: 100%;
  cursor: crosshair;
}

/* Pagination / Participant switcher */
.participant-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.participant-info {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--gray-700);
  min-width: 130px;
  text-align: center;
}

/* Drag instructions tip */
.canvas-tip {
  font-size: 0.75rem;
  color: var(--gray-500);
  padding: 0.4rem 1rem;
  background: #fef9c3;
  color: #854d0e;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #fef08a;
}

/* Scanner Layout */
.scanner-grid {
  display: grid;
  grid-template-columns: 480px 1fr;
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .scanner-grid {
    grid-template-columns: 1fr;
  }
}

.camera-box {
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

#qrReader {
  width: 100% !important;
}

#qrReader video {
  width: 100% !important;
  border-radius: 8px;
}

.scan-result-card {
  padding: 1.25rem;
  border-radius: 8px;
  background: var(--white);
  border: 2px solid var(--gray-200);
  transition: all 0.3s ease;
}

.scan-result-card.success-scan {
  border-color: var(--success);
  background: var(--success-light);
}

.scan-result-card.warning-scan {
  border-color: var(--warning);
  background: #fffbeb;
}

.scan-result-card.error-scan {
  border-color: var(--danger);
  background: var(--danger-light);
}

/* Stats Cards */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.stat-icon.blue { background: var(--primary-light); color: var(--primary); }
.stat-icon.green { background: var(--success-light); color: var(--success); }
.stat-icon.orange { background: #fff7ed; color: #ea580c; }

.stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--gray-500);
  font-weight: 500;
}

/* Table styling */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

th {
  background: var(--gray-50);
  padding: 0.65rem 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  border-bottom: 2px solid var(--gray-200);
}

td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--gray-200);
  vertical-align: middle;
}

tr:hover {
  background: var(--gray-50);
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.badge-success { background: #dcfce7; color: #15803d; }
.badge-warning { background: #fef3c7; color: #b45309; }
.badge-danger { background: #fee2e2; color: #b91c1c; }
.badge-primary { background: #dbeafe; color: #1d4ed8; }
.badge-secondary { background: #f1f5f9; color: #475569; }

/* Progress Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

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

.modal-dialog {
  background: var(--white);
  border-radius: var(--radius);
  max-width: 500px;
  width: 90%;
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.progress-bar-bg {
  width: 100%;
  height: 12px;
  background: var(--gray-200);
  border-radius: 6px;
  overflow: hidden;
  margin: 1rem 0;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), #38bdf8);
  width: 0%;
  transition: width 0.15s ease;
}

/* Export Settings Grid */
.export-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}

.export-box {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.5rem;
  background: var(--white);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow);
}

.export-box h4 {
  font-size: 1.1rem;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.export-box p {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-bottom: 1.25rem;
}

/* Call Button */
.btn-tel {
  background: #16a34a;
  color: white;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
}
.btn-tel:hover {
  background: #15803d;
}