:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-focus: #38bdf8;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-cyan: #38bdf8;
  --accent-indigo: #6366f1;
  --accent-rose: #f43f5e;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.25);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: rgba(241, 245, 249, 0.95);
  --border-color: rgba(0, 0, 0, 0.08);
  --border-focus: #0284c7;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --shadow-glow: 0 0 25px rgba(2, 132, 199, 0.15);
  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.07);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.15), transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(99, 102, 241, 0.1), transparent 60%);
  background-attachment: fixed;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Glass card styling */
.glass {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

/* Container */
.container {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  margin-bottom: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, #0284c7, #6366f1);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.4);
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-cyan);
  transform: translateY(-1px);
}

.cf-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  background: rgba(245, 158, 11, 0.12);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: 9999px;
}

/* Tabs */
.tabs-nav {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.35rem;
  gap: 0.35rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  flex: 1;
  min-width: fit-content;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.2), rgba(99, 102, 241, 0.2));
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
  box-shadow: 0 2px 10px rgba(56, 189, 248, 0.15);
}

/* Tab Panels */
.tab-panel {
  display: none;
  animation: fadeIn 0.25s ease;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Camera Scanner Container */
.scanner-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.scanner-viewport-wrapper {
  position: relative;
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-card);
  margin-bottom: 1.25rem;
}

#reader {
  width: 100% !important;
  height: 100% !important;
  border: none !important;
}

#reader video {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
  border-radius: var(--radius-lg);
}

/* Viewfinder Laser and Frame */
.scanner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 15%;
}

.scanner-box {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 12px;
}

/* Viewfinder corner brackets */
.corner {
  position: absolute;
  width: 24px;
  height: 24px;
  border-color: var(--accent-cyan);
  border-style: solid;
  border-width: 0;
}
.corner-tl { top: -2px; left: -2px; border-top-width: 4px; border-left-width: 4px; border-top-left-radius: 8px; }
.corner-tr { top: -2px; right: -2px; border-top-width: 4px; border-right-width: 4px; border-top-right-radius: 8px; }
.corner-bl { bottom: -2px; left: -2px; border-bottom-width: 4px; border-left-width: 4px; border-bottom-left-radius: 8px; }
.corner-br { bottom: -2px; right: -2px; border-bottom-width: 4px; border-right-width: 4px; border-bottom-right-radius: 8px; }

/* Laser Beam Animation */
.laser-beam {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-rose), var(--accent-cyan), transparent);
  box-shadow: 0 0 14px var(--accent-rose), 0 0 8px var(--accent-cyan);
  animation: scanLaser 2.2s infinite ease-in-out;
}

@keyframes scanLaser {
  0% { top: 0%; opacity: 0.3; }
  50% { top: 98%; opacity: 1; }
  100% { top: 0%; opacity: 0.3; }
}

/* Scanner idle / permission placeholder */
.scanner-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem;
  background: rgba(15, 23, 42, 0.95);
  color: var(--text-secondary);
  z-index: 5;
}

.scanner-placeholder.hidden {
  display: none;
}

.scanner-controls {
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

/* Select element */
.select-input {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.55rem 0.85rem;
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s;
  cursor: pointer;
  flex: 1 1 200px;
}
.select-input:focus { border-color: var(--border-focus); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7, #2563eb);
  color: white;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1, #1d4ed8);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.45);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
  border-color: rgba(244, 63, 94, 0.3);
}
.btn-danger:hover {
  background: rgba(244, 63, 94, 0.25);
}

.btn-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border-color: rgba(16, 185, 129, 0.3);
}

/* File Upload Zone */
.upload-dropzone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.02);
}

.upload-dropzone:hover, .upload-dropzone.drag-over {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.06);
  transform: scale(1.005);
}

.upload-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-container {
  margin-top: 1.5rem;
  display: none;
  flex-direction: column;
  align-items: center;
}

.preview-image {
  max-width: 100%;
  max-height: 280px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  object-fit: contain;
}

/* Result Modal / Result Card */
.result-card {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  display: none;
  animation: slideUp 0.3s ease;
}

.result-card.active {
  display: block;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.result-badge.badge-url { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); border-color: rgba(16, 185, 129, 0.3); }
.result-badge.badge-wifi { background: rgba(99, 102, 241, 0.15); color: #818cf8; border-color: rgba(99, 102, 241, 0.3); }

.result-content {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9rem;
  word-break: break-all;
  white-space: pre-wrap;
  color: var(--text-primary);
  max-height: 200px;
  overflow-y: auto;
  margin-bottom: 1rem;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Generator Section */
.generator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .generator-grid {
    grid-template-columns: 1fr;
  }
}

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.85rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-control:focus {
  border-color: var(--border-focus);
}

textarea.form-control {
  resize: vertical;
  min-height: 90px;
}

.qr-preview-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
}

#generated-qrcode {
  background: white;
  padding: 1rem;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  display: inline-block;
  margin-bottom: 1rem;
}

#generated-qrcode img, #generated-qrcode canvas {
  display: block;
  margin: 0 auto;
}

/* History List */
.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

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

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.15rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  gap: 1rem;
}

.history-item:hover {
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.3);
}

.history-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}

.history-text {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.2rem;
}

.history-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

/* Toast notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: toastIn 0.25s ease, toastOut 0.25s ease 2.75s forwards;
  pointer-events: auto;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

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

/* Footer */
footer {
  margin-top: auto;
  padding: 2rem 1rem 1rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

footer a {
  color: var(--accent-cyan);
  text-decoration: none;
}
footer a:hover {
  text-decoration: underline;
}