:root {
  /* Functional Minimalism Palette */
  --primary-color: #111827;
  /* Near black for high contrast */
  --primary-hover: #374151;
  --accent-color: #2563eb;
  /* Professional Blue */
  --background: #f9fafb;
  /* Very light gray */
  --card-background: #ffffff;
  --text-color: #111827;
  --text-secondary: #6b7280;
  --border-color: #e5e7eb;

  /* Bento Grid Spacing & Radius */
  --gap: 1rem;
  --border-radius: 1rem;
  /* Slightly tighter radius */
  --card-padding: 1.5rem;

  /* Effects - Flat Design Preference */
  --shadow-sm: none;
  /* Removed for flat look */
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  /* Very subtle for hover only */
  --transition: all 0.2s ease-in-out;

  --input-height: 3rem;
}

/* Dark Mode */
body.dark-mode {
  --primary-color: #ffffff;
  --primary-hover: #e5e7eb;
  --background: #0f172a;
  /* Richer dark background */
  --card-background: #1e293b;
  --text-color: #f8fafc;
  --text-secondary: #94a3b8;
  --border-color: #334155;
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--background);
  color: var(--text-color);
  line-height: 1.5;
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  padding: var(--gap);
}

/* Main Bento Grid Container */
.container {
  max-width: 1200px;
  /* Tighter container */
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(min-content, auto);
  gap: var(--gap);
}

/* Bento Items */
.bento-item {
  background: var(--card-background);
  border-radius: var(--border-radius);
  padding: var(--card-padding);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.bento-item:hover {
  border-color: var(--accent-color);
  /* Subtle interaction */
}

/* Header - Full Width */
.bento-header {
  grid-column: span 12;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.bento-header h1 {
  font-size: 1.5rem;
  /* Smaller, more professional title */
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-color);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* Header Actions Group */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Network Status Indicator */
.network-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  background: var(--background);
  border: 1px solid var(--border-color);
  font-size: 0.75rem;
  font-weight: 500;
  transition: var(--transition);
}

.network-status svg {
  width: 16px;
  height: 16px;
}

.network-status.online {
  color: #10b981;
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.1);
}

.network-status.offline {
  color: #ef4444;
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

.network-status.slow {
  color: #f59e0b;
  border-color: #f59e0b;
  background: rgba(245, 158, 11, 0.1);
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.network-status {
  animation: fadeSlideIn 0.3s ease;
}

/* Method Selection */
.bento-method {
  grid-column: span 4;
}

/* Settings */
.bento-settings {
  grid-column: span 8;
}

/* Input Area */
.bento-input {
  grid-column: span 12;
  min-height: 300px;
}

/* Controls */
.bento-controls {
  grid-column: span 12;
  display: flex;
  justify-content: space-between;
  /* Spread out controls */
  align-items: center;
  padding: 0.5rem 0;
}

/* QR Grid */
.bento-results {
  grid-column: span 12;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--gap);
}

/* Typography & Elements */
h2 {
  font-size: 0.75rem;
  /* Label-like headers */
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-color);
  margin-bottom: 0.375rem;
}

#fileInput {
  display: none !important;
}

input[type="text"],
select {
  width: 100%;
  height: var(--input-height);
  padding: 0 1rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  /* Smaller radius for inputs */
  background: var(--background);
  color: var(--text-color);
  font-size: 0.875rem;
  transition: var(--transition);
  appearance: none;
  /* Remove default arrow */
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
}

input[type="text"] {
  background-image: none;
}

input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 1px var(--accent-color);
  /* Clean focus ring */
}

/* Buttons */
button {
  height: var(--input-height);
  padding: 0 1.5rem;
  border-radius: 0.5rem;
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.primary-btn {
  background: var(--primary-color);
  color: var(--background);
  /* Inverted text */
}

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

.icon-btn {
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
}

.icon-btn:hover {
  background: var(--background);
  color: var(--text-color);
  border-color: var(--text-secondary);
}

/* File Upload */
.file-upload-label {
  border: 1px dashed var(--border-color);
  /* Thinner border */
  border-radius: var(--border-radius);
  background: var(--background);
  /* Subtle background contrast */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  cursor: pointer;
  transition: var(--transition);
  height: 100%;
}

.file-upload-label:hover,
.file-upload-label.drag-over {
  border-color: var(--accent-color);
  background: rgba(37, 99, 235, 0.05);
}

.upload-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

/* QR Card */
.qr-card {
  background: var(--card-background);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.qr-card canvas {
  max-width: 100%;
  height: auto;
  border-radius: 0.25rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
  /* Frame for QR */
}

/* Responsive */
@media (max-width: 1024px) {

  .bento-method,
  .bento-settings {
    grid-column: span 12;
  }
}

@media (max-width: 768px) {
  .container {
    grid-template-columns: 1fr;
    padding: 1rem;
    gap: 1rem;
  }

  .bento-item {
    grid-column: span 1;
    padding: 1.25rem;
  }

  .bento-header h1 {
    font-size: 1.25rem;
  }
}

/* Utilities */
.hidden {
  display: none !important;
}

.flex-row {
  display: flex;
  gap: 0.75rem;
}

.flex-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.w-full {
  width: 100%;
}

/* Loader */
.loader {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Notification */
.notification {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 0.5rem;
  background: var(--primary-color);
  color: var(--background);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  animation: slideUp 0.3s ease;
  z-index: 1000;
}

.notification.error {
  background: #dc2626;
  color: white;
}

@keyframes slideUp {
  from {
    transform: translateY(10px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Footer */
.footer {
  grid-column: span 12;
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
  font-size: 0.75rem;
}

/* === PHASE 2: Scanner Modal === */
.scanner-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.scanner-container {
  background: var(--card-background);
  border-radius: var(--border-radius);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow: hidden;
}

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

.scanner-header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--text-color);
  text-transform: none;
  letter-spacing: normal;
}

.scanner-video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  background: #000;
  overflow: hidden;
}

#scannerVideo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scanner-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.scanner-frame {
  width: 250px;
  height: 250px;
  border: 3px solid var(--accent-color);
  border-radius: 1rem;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

.scanner-result {
  padding: 1.5rem;
  border-top: 1px solid var(--border-color);
  background: var(--background);
}

.scanner-result h3 {
  margin: 0 0 0.5rem 0;
  color: var(--text-color);
  font-size: 1rem;
}

.scanner-result p {
  margin: 0;
  padding: 1rem;
  background: var(--card-background);
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  word-break: break-all;
  font-family: monospace;
  font-size: 0.875rem;
}

/* Export buttons in QR cards */
.qr-card-actions {
  display: flex;
  gap: 0.5rem;
  width: 100%;
  margin-top: 0.5rem;
}

.qr-card-actions button {
  flex: 1;
  height: 2.5rem;
  font-size: 0.75rem;
  padding: 0 0.75rem;
}

.secondary-btn {
  background: var(--background);
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

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