/* ============================================================
   QR Code Generator — Styles
   Extends the Calcolator base theme (../assets/css/styles.css)
   ============================================================ */

/* ---------- Layout ---------- */
.qr-breadcrumb {
  margin: 20px 0;
  font-size: 14px;
}
.qr-breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}
.qr-breadcrumb span {
  margin: 0 8px;
  color: var(--muted);
}
.qr-breadcrumb span:last-child {
  color: var(--text);
}

.qr-hero {
  text-align: center;
  margin-bottom: 28px;
}
.qr-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.qr-subtitle {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

.ad-container {
  margin: 20px 0;
}
.ad-mobile-only {
  display: none;
}

/* Two-column app layout */
.qr-app {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
  margin: 24px 0 40px;
}

/* ---------- LEFT PANEL: Controls ---------- */
.qr-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.qr-section {
  background: var(--card);
  border: 1px solid var(--card-border, rgba(255,255,255,0.06));
  border-radius: 14px;
  padding: 20px;
  transition: box-shadow 0.3s ease;
}
.qr-section:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.qr-section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 14px;
  padding: 0;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  cursor: default;
}
.qr-section-title svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* Collapsible sections */
.qr-collapse-btn {
  cursor: pointer;
  justify-content: space-between;
  margin-bottom: 0;
  transition: margin 0.3s ease;
}
.qr-collapse-btn span {
  display: flex;
  align-items: center;
  gap: 8px;
}
.qr-collapse-btn[aria-expanded="true"] {
  margin-bottom: 14px;
}
.qr-chevron {
  transition: transform 0.3s ease;
  color: var(--muted);
}
.qr-collapse-btn[aria-expanded="false"] .qr-chevron {
  transform: rotate(-90deg);
}
.qr-collapse-body {
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.25s ease;
  max-height: 600px;
  opacity: 1;
}
.qr-collapse-body.collapsed {
  max-height: 0;
  opacity: 0;
  pointer-events: none;
}

/* ---------- QR Type Grid ---------- */
.qr-type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 8px;
}
.qr-type-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 10px 6px;
  border: 2px solid var(--card-border, rgba(255,255,255,0.08));
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  line-height: 1.2;
}
.qr-type-btn:hover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.06);
}
.qr-type-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.qr-type-btn.active {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}
.qr-type-btn .qr-type-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: var(--muted);
  transition: color 0.2s ease;
}
.qr-type-btn .qr-type-icon svg {
  width: 20px;
  height: 20px;
}
.qr-type-btn.active .qr-type-icon {
  color: var(--primary);
}

/* ---------- Form Fields ---------- */
.qr-field {
  margin-bottom: 14px;
}
.qr-field:last-child {
  margin-bottom: 0;
}
.qr-field label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.qr-field input[type="text"],
.qr-field input[type="email"],
.qr-field input[type="tel"],
.qr-field input[type="url"],
.qr-field input[type="number"],
.qr-field input[type="date"],
.qr-field input[type="datetime-local"],
.qr-field textarea,
.qr-field select {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--card-border, rgba(255,255,255,0.1));
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  box-sizing: border-box;
}
.qr-field input:focus,
.qr-field textarea:focus,
.qr-field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}
.qr-field textarea {
  resize: vertical;
  min-height: 80px;
}
.qr-field select {
  cursor: pointer;
}
.qr-field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* Color inputs */
.qr-color-input {
  display: flex;
  align-items: center;
  gap: 8px;
}
.qr-color-input input[type="color"] {
  width: 36px;
  height: 36px;
  border: 2px solid var(--card-border, rgba(255,255,255,0.1));
  border-radius: 8px;
  padding: 2px;
  cursor: pointer;
  background: var(--bg);
  flex-shrink: 0;
}
.qr-color-text {
  width: 80px !important;
  font-family: 'Courier New', monospace;
  font-size: 0.82rem !important;
  text-transform: uppercase;
}

/* Checkbox */
.qr-checkbox-label {
  display: flex !important;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
}
.qr-checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* Range slider */
.qr-field input[type="range"] {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--card-border, #e2e8f0);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}
.qr-field input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.3);
  transition: transform 0.15s ease;
}
.qr-field input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}
.qr-field input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: none;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.3);
}

/* Validation */
.qr-validation {
  font-size: 0.82rem;
  min-height: 20px;
  transition: all 0.2s ease;
}
.qr-validation.error {
  color: #ef4444;
}
.qr-validation.success {
  color: #22c55e;
}

/* ---------- Logo Upload ---------- */
.qr-logo-upload {
  border: 2px dashed var(--card-border, rgba(255,255,255,0.12));
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 12px;
  position: relative;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.qr-logo-upload:hover,
.qr-logo-upload.dragover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.04);
}
.qr-logo-upload:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.qr-logo-placeholder {
  color: var(--muted);
}
.qr-logo-placeholder p {
  font-size: 0.9rem;
  font-weight: 600;
  margin: 8px 0 2px;
}
.qr-logo-placeholder span {
  font-size: 0.75rem;
  opacity: 0.7;
}
.qr-logo-preview-img {
  max-width: 80px;
  max-height: 80px;
  border-radius: 8px;
  object-fit: contain;
}

/* ---------- Buttons ---------- */
.qr-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}
.qr-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.qr-btn-primary {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: white;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.25);
}
.qr-btn-primary:hover:not(:disabled) {
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
  transform: translateY(-1px);
}

.qr-btn-outline {
  background: var(--bg);
  color: var(--text);
  border: 1.5px solid var(--card-border, rgba(255,255,255,0.1));
}
.qr-btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.qr-btn-sm {
  padding: 6px 12px;
  font-size: 0.78rem;
}
.qr-btn-full {
  width: 100%;
}
.qr-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.qr-btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1.5px solid var(--card-border, rgba(255,255,255,0.1));
  border-radius: 6px;
  background: var(--bg);
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}
.qr-btn-icon:hover {
  border-color: var(--primary);
  color: var(--primary);
}

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

/* ---------- Download Grid ---------- */
.qr-download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 10px;
}
.qr-btn-download {
  background: var(--card);
  color: var(--text);
  border: 1.5px solid var(--card-border, rgba(255,255,255,0.08));
  padding: 10px 8px;
  font-size: 0.78rem;
}
.qr-btn-download:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(99, 102, 241, 0.06);
}

/* ---------- RIGHT PANEL: Preview ---------- */
.qr-preview-panel {
  min-width: 0;
}
.qr-preview-sticky {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.qr-preview-card {
  background: var(--card);
  border: 1px solid var(--card-border, rgba(255,255,255,0.06));
  border-radius: 16px;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  overflow: hidden;
}
.qr-preview-area {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}
.qr-preview-area canvas,
.qr-preview-area svg {
  max-width: 100%;
  height: auto;
}

.qr-placeholder {
  color: var(--muted);
  text-align: center;
  animation: qrPulse 2.5s infinite ease-in-out;
}
@keyframes qrPulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* Encoded text */
.qr-encoded-text {
  background: var(--card);
  border: 1px solid var(--card-border, rgba(255,255,255,0.06));
  border-radius: 10px;
  padding: 12px 14px;
}
.qr-encoded-text label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
  display: block;
}
.qr-encoded-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.qr-encoded-row code {
  flex: 1;
  font-size: 0.78rem;
  color: var(--text);
  word-break: break-all;
  line-height: 1.4;
  background: var(--bg);
  padding: 6px 10px;
  border-radius: 6px;
  max-height: 80px;
  overflow-y: auto;
}

/* ---------- SEO Content ---------- */
.qr-content-section {
  margin-top: 40px;
  line-height: 1.7;
}
.qr-content-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.qr-content-section h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
  margin: 18px 0 8px;
}
.qr-content-section p,
.qr-content-section li {
  color: var(--text);
  font-size: 0.95rem;
}
.qr-content-section ol,
.qr-content-section ul {
  padding-left: 20px;
  margin: 10px 0;
}
.qr-content-section li {
  margin-bottom: 6px;
}
.qr-faq-item {
  margin: 16px 0;
  padding: 16px;
  background: var(--card);
  border: 1px solid var(--card-border, rgba(255,255,255,0.06));
  border-radius: 10px;
}
.qr-faq-item h3 {
  margin: 0 0 8px;
}
.qr-faq-item p {
  margin: 0;
}

/* Related tools */
.qr-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 14px;
}
.qr-related-grid a {
  padding: 14px;
  background: var(--card);
  border: 1px solid var(--card-border, rgba(255,255,255,0.06));
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.2s ease;
}
.qr-related-grid a:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.qr-related-grid a strong {
  display: block;
  color: var(--primary);
  margin-bottom: 4px;
  font-size: 0.9rem;
}
.qr-related-grid a span {
  font-size: 0.8rem;
  color: var(--muted);
}

/* ---------- Toast Notification ---------- */
.qr-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--text);
  color: var(--bg);
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}
.qr-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .qr-app {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .qr-preview-sticky {
    position: static;
  }
  .qr-download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .qr-type-grid {
    grid-template-columns: repeat(auto-fill, minmax(75px, 1fr));
  }
  .qr-hero h1 {
    font-size: 1.6rem;
  }
  .ad-mobile-only {
    display: block;
  }
  .qr-field-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

@media (max-width: 480px) {
  .qr-section {
    padding: 14px;
    border-radius: 10px;
  }
  .qr-preview-card {
    padding: 16px;
    min-height: 240px;
  }
  .qr-actions-row {
    grid-template-columns: 1fr;
  }
}

/* ---------- High Contrast / Reduced Motion ---------- */
@media (prefers-contrast: high) {
  .qr-type-btn {
    border-width: 3px;
  }
  .qr-type-btn.active {
    border-width: 3px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}