.hero {
  padding: clamp(3.5rem, 7vw, 5.5rem) 1.5rem 2.25rem;
}

.hero-content {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.hero-tagline {
  max-width: 680px;
  margin: 0.75rem auto 0;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.tool-main {
  padding: 0 1rem 4rem;
}

.tool-container {
  max-width: 1040px;
  margin: 0 auto;
  display: grid;
  gap: 1.5rem;
}

.input-section,
.settings-section,
.output-section,
.pro-features-section,
.help-guides-section,
.similar-tools {
  background: var(--surface-primary, #ffffff);
  border: 1px solid var(--border-subtle, rgba(15, 23, 42, 0.08));
  border-radius: 24px;
  padding: clamp(1.25rem, 2vw, 2rem);
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.06);
}

.section-heading {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.section-heading-tight {
  margin-bottom: 1rem;
}

.section-heading p,
.output-subtitle,
.field-help,
.status-line,
.preview-meta-card p,
.help-guide-card p,
.similar-tool-card p,
.char-count {
  color: var(--text-secondary);
}

.type-picker {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.type-tab,
.button-primary,
.button-secondary {
  appearance: none;
  border-radius: 14px;
  border: 1px solid var(--border-subtle, rgba(15, 23, 42, 0.12));
  padding: 0.9rem 1.1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease, background 160ms ease;
}

.type-tab {
  background: var(--surface-secondary, #f8fafc);
  color: var(--text-primary);
}

.type-tab.active {
  background: var(--accent-primary, #111827);
  color: #ffffff;
  border-color: var(--accent-primary, #111827);
  box-shadow: 0 14px 30px rgba(17, 24, 39, 0.18);
}

.type-tab:focus-visible,
.button-primary:focus-visible,
.button-secondary:focus-visible,
.text-input:focus-visible,
.select-input:focus-visible,
.color-input:focus-visible,
.checkbox-row:focus-within,
.help-guide-card:focus-visible,
.similar-tool-card:focus-visible {
  outline: 3px solid rgba(59, 130, 246, 0.25);
  outline-offset: 2px;
}

.form-panels,
.settings-grid,
.preview-container,
.help-guides-grid,
.similar-tools-grid,
.pro-card-grid {
  display: grid;
  gap: 1rem;
}

.input-grid,
.settings-grid-wide {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.input-group {
  display: grid;
  gap: 0.45rem;
}

.input-group-full {
  grid-column: 1 / -1;
}

.text-input,
.select-input,
.color-input {
  width: 100%;
  min-height: 48px;
  border-radius: 14px;
  border: 1px solid var(--border-subtle, rgba(15, 23, 42, 0.12));
  background: var(--surface-secondary, #f8fafc);
  color: var(--text-primary);
  padding: 0.9rem 1rem;
  font: inherit;
}

.textarea-input {
  min-height: 128px;
  resize: vertical;
}

.color-input {
  padding: 0.4rem;
}

.field-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.checkbox-row {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: 0.5rem;
}

.example-strip,
.button-row,
.pro-card-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.button-primary {
  background: var(--accent-primary, #111827);
  color: #ffffff;
  border-color: var(--accent-primary, #111827);
}

.button-secondary {
  background: var(--surface-secondary, #f8fafc);
  color: var(--text-primary);
}

.button-primary:hover,
.button-secondary:hover,
.type-tab:hover,
.help-guide-card:hover,
.similar-tool-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

.button-secondary:disabled,
.button-primary:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
  box-shadow: none;
}

.button-spinner {
  display: inline-flex;
  width: 0.95rem;
  height: 0.95rem;
  border: 2px solid rgba(255, 255, 255, 0.45);
  border-top-color: #ffffff;
  border-radius: 999px;
  margin-left: 0.5rem;
  animation: spin 0.8s linear infinite;
}

.status-line,
.input-error {
  margin-top: 1rem;
}

.input-error {
  color: #b91c1c;
}

.section-hidden {
  display: none;
}

.preview-container.qr-preview-container {
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  align-items: start;
}

.qr-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 320px;
  padding: 1rem;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.96), rgba(241, 245, 249, 0.96));
}

#qrCanvas {
  width: min(100%, 320px);
  height: auto;
  border-radius: 18px;
  background: #ffffff;
}

.logo-badge,
.pro-badge-inline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.18);
  color: #92400e;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.logo-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

.preview-meta {
  display: grid;
  gap: 1rem;
}

.preview-meta-card,
.help-guide-card,
.similar-tool-card {
  border-radius: 18px;
  border: 1px solid var(--border-subtle, rgba(15, 23, 42, 0.1));
  background: var(--surface-secondary, #f8fafc);
  padding: 1rem;
  color: inherit;
  text-decoration: none;
}

.scan-notes {
  padding-left: 1.1rem;
  display: grid;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.pro-features-section {
  background: linear-gradient(180deg, rgba(255, 251, 235, 0.92), rgba(255, 247, 237, 0.92));
}

.pro-feature.pro-unlocked {
  position: relative;
}

.help-guides-grid,
.similar-tools-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.similar-tool-card h3,
.help-guide-card h3,
.preview-meta-card h3 {
  margin-bottom: 0.4rem;
}

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

@media (max-width: 840px) {
  .type-picker,
  .input-grid,
  .settings-grid-wide,
  .preview-container.qr-preview-container,
  .help-guides-grid,
  .similar-tools-grid {
    grid-template-columns: 1fr;
  }

  .button-row,
  .example-strip,
  .pro-card-grid {
    flex-direction: column;
  }

  .button-row > *,
  .example-strip > *,
  .pro-card-grid > * {
    width: 100%;
  }
}