:root {
  --ink: #1a1c2f;
  --muted: #5f647f;
  --paper: #fff9ef;
  --surface: rgba(255, 255, 255, 0.88);
  --line: rgba(26, 28, 47, 0.12);
  --accent: #ff7a2f;
  --accent-deep: #da5b14;
  --accent-soft: #ffd9b8;
  --navy: #111827;
  --mint: #b7f3d8;
  --shadow: 0 22px 60px rgba(17, 24, 39, 0.12);
  --radius-xl: 28px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --max: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 122, 47, 0.18), transparent 32%),
    radial-gradient(circle at 84% 18%, rgba(183, 243, 216, 0.35), transparent 25%),
    linear-gradient(160deg, #fff7eb 0%, #fffdf8 42%, #f8fbff 100%);
  font-family: "Bahnschrift", "Trebuchet MS", "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: var(--navy);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

code {
  background: rgba(17, 24, 39, 0.08);
  border-radius: 6px;
  padding: 0.14rem 0.35rem;
}

.site-header {
  background: rgba(255, 249, 239, 0.74);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(17, 24, 39, 0.07);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav {
  align-items: center;
  display: flex;
  gap: 20px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max);
  padding: 16px 22px;
}

.brand {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  gap: 11px;
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", sans-serif;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: linear-gradient(145deg, var(--accent), var(--accent-deep));
  border-radius: 10px;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.3);
  color: white;
  display: inline-flex;
  height: 34px;
  justify-content: center;
  width: 34px;
}

.nav-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--ink);
}

.page-shell {
  margin: 0 auto;
  max-width: var(--max);
  padding: 34px 22px 60px;
}

.hero {
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.5fr);
  margin: 26px 0 24px;
}

.eyebrow {
  color: var(--accent-deep);
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  margin: 0 0 14px;
  text-transform: uppercase;
}

.hero-copy h1 {
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", sans-serif;
  font-size: clamp(2.3rem, 4.5vw, 4.5rem);
  letter-spacing: -0.04em;
  line-height: 0.98;
  margin: 0 0 18px;
  max-width: 820px;
}

.hero-text {
  color: var(--muted);
  font-size: 1.08rem;
  margin: 0;
  max-width: 760px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.hero-points span {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: 999px;
  box-shadow: 0 8px 20px rgba(17, 24, 39, 0.06);
  font-size: 0.92rem;
  font-weight: 700;
  padding: 8px 12px;
}

.privacy-note {
  align-self: end;
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.82), rgba(255, 217, 184, 0.6));
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  color: var(--muted);
  padding: 18px;
}

.privacy-note strong {
  color: var(--ink);
  display: block;
  margin-bottom: 8px;
}

.tool-grid {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(340px, 440px) minmax(0, 1fr);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.controls {
  padding: 20px;
}

.preset-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.preset-chip {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(17, 24, 39, 0.1);
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
  min-height: 38px;
  padding: 8px 14px;
}

.preset-chip:hover {
  border-color: rgba(255, 122, 47, 0.45);
  transform: translateY(-1px);
}

.control-stack {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.control,
.mode-panel {
  display: grid;
  gap: 8px;
}

.control label,
.style-card h2 {
  font-size: 0.93rem;
  font-weight: 800;
}

.control-row {
  align-items: center;
  display: flex;
  gap: 14px;
  justify-content: space-between;
}

.control output {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.field-hint {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

input[type="text"],
input[type="url"],
input[type="email"],
select,
textarea {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(17, 24, 39, 0.12);
  border-radius: var(--radius-md);
  color: var(--ink);
  min-height: 46px;
  padding: 11px 13px;
  width: 100%;
}

textarea {
  min-height: 108px;
  resize: vertical;
}

input[type="range"] {
  accent-color: var(--accent);
  width: 100%;
}

input[type="color"] {
  background: transparent;
  border: 1px solid rgba(17, 24, 39, 0.12);
  border-radius: var(--radius-md);
  height: 46px;
  padding: 4px;
  width: 100%;
}

.split {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr;
}

.style-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 245, 234, 0.9));
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: 22px;
  display: grid;
  gap: 14px;
  padding: 16px;
}

.style-card h2 {
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", sans-serif;
  font-size: 1.05rem;
  margin: 0;
}

.toggle-card {
  align-items: start;
  background: rgba(17, 24, 39, 0.04);
  border: 1px solid rgba(17, 24, 39, 0.06);
  border-radius: 16px;
  display: grid;
  gap: 10px;
  grid-template-columns: auto 1fr;
  padding: 12px 13px;
}

.toggle-card input {
  accent-color: var(--accent);
  height: 18px;
  margin-top: 3px;
  width: 18px;
}

.toggle-card strong {
  display: block;
}

.toggle-card small {
  color: var(--muted);
  display: block;
  margin-top: 2px;
}

.actions {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr;
  margin-top: 18px;
}

.btn {
  align-items: center;
  border: 1px solid transparent;
  border-radius: 999px;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  min-height: 46px;
  padding: 10px 14px;
  text-decoration: none;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(145deg, var(--accent), var(--accent-deep));
  box-shadow: 0 14px 26px rgba(218, 91, 20, 0.22);
  color: white;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(17, 24, 39, 0.11);
  color: var(--ink);
}

.btn-ghost {
  background: rgba(17, 24, 39, 0.05);
  border-color: rgba(17, 24, 39, 0.08);
  color: var(--muted);
  grid-column: 1 / -1;
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.48;
  transform: none;
}

.status-note {
  border-top: 1px solid rgba(17, 24, 39, 0.07);
  color: var(--muted);
  font-size: 0.94rem;
  margin: 18px 0 0;
  padding-top: 14px;
}

.status-note[data-state="success"] {
  color: #1f7a52;
}

.status-note[data-state="warning"] {
  color: #a84b18;
}

.preview-panel {
  overflow: hidden;
}

.preview-topbar {
  align-items: center;
  border-bottom: 1px solid rgba(17, 24, 39, 0.08);
  display: flex;
  gap: 14px;
  justify-content: space-between;
  padding: 16px 18px;
}

.preview-topbar strong {
  display: block;
}

.preview-subtitle {
  color: var(--muted);
  display: block;
  font-size: 0.9rem;
  margin-top: 2px;
}

.mode-badge {
  background: rgba(255, 122, 47, 0.12);
  border-radius: 999px;
  color: var(--accent-deep);
  font-size: 0.84rem;
  font-weight: 800;
  padding: 8px 12px;
  white-space: nowrap;
}

.preview-stage {
  background:
    radial-gradient(circle at top right, rgba(255, 122, 47, 0.12), transparent 26%),
    linear-gradient(180deg, rgba(248, 251, 255, 0.9), rgba(255, 248, 240, 0.96));
  padding: 24px;
}

.preview-card {
  align-items: center;
  background-image:
    linear-gradient(45deg, rgba(17, 24, 39, 0.05) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(17, 24, 39, 0.05) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(17, 24, 39, 0.05) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(17, 24, 39, 0.05) 75%);
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
  background-size: 24px 24px;
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: 24px;
  display: flex;
  justify-content: center;
  min-height: 420px;
  padding: 28px;
}

.qr-preview {
  align-items: center;
  display: flex;
  justify-content: center;
  max-width: 100%;
  width: 100%;
}

.qr-preview svg {
  border-radius: 22px;
  box-shadow: 0 18px 45px rgba(17, 24, 39, 0.12);
  height: auto;
  max-width: min(100%, 420px);
}

.preview-empty {
  color: var(--muted);
  display: grid;
  gap: 6px;
  max-width: 340px;
  text-align: center;
}

.preview-empty strong {
  color: var(--ink);
  font-size: 1.05rem;
}

.stats-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 18px;
}

.stat-card {
  background: rgba(17, 24, 39, 0.04);
  border: 1px solid rgba(17, 24, 39, 0.05);
  border-radius: 18px;
  display: grid;
  gap: 6px;
  padding: 14px;
}

.stat-label {
  color: var(--muted);
  font-size: 0.84rem;
}

.stat-card strong {
  font-size: 1.05rem;
}

.payload-panel {
  border-top: 1px solid rgba(17, 24, 39, 0.08);
  padding: 18px;
}

.payload-header {
  display: grid;
  gap: 4px;
  margin-bottom: 10px;
}

.payload-header span {
  color: var(--muted);
  font-size: 0.9rem;
}

#payloadOutput {
  background: rgba(17, 24, 39, 0.03);
  font-family: "Consolas", "SFMono-Regular", monospace;
  min-height: 148px;
}

.seo-section {
  margin-top: 56px;
}

.seo-section h2 {
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", sans-serif;
  font-size: clamp(1.7rem, 3vw, 2.7rem);
  letter-spacing: -0.03em;
  line-height: 1.06;
  margin: 0 0 14px;
}

.seo-section p {
  color: var(--muted);
  margin: 0;
  max-width: 860px;
}

.feature-grid,
.faq-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.feature,
.faq-item {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: 22px;
  padding: 18px;
}

.feature h3,
.faq-item h3 {
  font-size: 1.02rem;
  margin: 0 0 8px;
}

.feature p,
.faq-item p {
  font-size: 0.96rem;
}

.content-page {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: var(--radius-xl);
  margin-top: 28px;
  padding: 30px;
}

.content-page h1 {
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", sans-serif;
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin: 0 0 18px;
}

.content-page h2 {
  margin-top: 28px;
}

.content-page p,
.content-page li {
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid rgba(17, 24, 39, 0.08);
  color: var(--muted);
  margin-top: 48px;
  padding: 24px 22px;
}

.footer-inner {
  align-items: center;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.is-hidden {
  display: none;
}

@media (max-width: 960px) {
  .hero,
  .tool-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .faq-grid,
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .nav,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-shell {
    padding-inline: 14px;
  }

  .controls,
  .content-page,
  .preview-topbar,
  .payload-panel,
  .stats-grid {
    padding-left: 14px;
    padding-right: 14px;
  }

  .split,
  .actions,
  .feature-grid,
  .faq-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .preview-card {
    min-height: 320px;
    padding: 18px;
  }
}