/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg: #faf9f6;
  --surface: #ffffff;
  --surface-2: #f2f0ea;
  --border: #e4e1d8;
  --text: #201f1c;
  --text-dim: #625f57;
  --accent: #d9622b;
  --accent-ink: #ffffff;
  --accent-soft: #fdece2;
  --success: #2f7d4f;
  --danger: #c8402c;
  --warn: #b8791a;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --display: "Manrope", var(--sans);
  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;
  --shadow-card: 0 1px 2px rgba(20,18,14,.04), 0 8px 24px -12px rgba(20,18,14,.12);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --container: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161512;
    --surface: #1f1e1a;
    --surface-2: #26241f;
    --border: #38352c;
    --text: #f4f1e9;
    --text-dim: #b3ae9f;
    --accent: #ef7c3f;
    --accent-ink: #17140f;
    --accent-soft: #392318;
  }
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { font-family: var(--display); text-wrap: balance; line-height: 1.08; letter-spacing: -0.01em; font-weight: 800; }
input { font: inherit; color: inherit; }
::selection { background: var(--accent); color: var(--accent-ink); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* =============================================================
   3. Utilities
   ============================================================= */
.container { max-width: var(--container); margin-inline: auto; padding-inline: 1.25rem; }
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--text); color: var(--bg);
  z-index: 9999; border-radius: 8px; font-weight: 600;
  transition: top .2s var(--ease-out);
}
.skip-link:focus { top: 1rem; }
.is-hidden { display: none !important; }

/* =============================================================
   4. Buttons
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .85rem 1.4rem; border-radius: var(--radius-s);
  font-weight: 700; font-size: .95rem;
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out), background .18s var(--ease-out);
}
.btn-primary {
  background: var(--accent); color: var(--accent-ink);
  box-shadow: 0 6px 20px -8px rgba(217,98,43,.55);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 26px -10px rgba(217,98,43,.65); }
.btn-secondary {
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--surface); border-color: var(--accent); }
.link-btn {
  font-size: .85rem; color: var(--text-dim); text-decoration: underline; text-underline-offset: 3px;
  padding: .4rem 0;
}
.link-btn:hover { color: var(--accent); }

/* =============================================================
   5. Header
   ============================================================= */
.site-header { padding-block: 1.1rem; border-bottom: 1px solid var(--border); background: var(--bg); }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.logo { display: flex; align-items: center; gap: .55rem; font-family: var(--display); font-weight: 800; font-size: 1.05rem; color: var(--text); }
.logo svg { color: var(--accent); flex-shrink: 0; }
.header-nav { display: none; gap: 1.6rem; font-size: .9rem; font-weight: 600; color: var(--text-dim); }
.header-nav a:hover { color: var(--accent); }
@media (min-width: 720px) { .header-nav { display: flex; } }

/* =============================================================
   6. Hero
   ============================================================= */
.hero { padding-block: 2.6rem 1.6rem; text-align: center; }
.hero h1 { font-size: clamp(1.9rem, 4.4vw, 3.1rem); max-width: 18ch; margin-inline: auto; }
.hero-sub { max-width: 56ch; margin: 1rem auto 0; color: var(--text-dim); font-size: 1.05rem; }

/* =============================================================
   7. Tool card
   ============================================================= */
.tool-section { padding-block: .5rem 2rem; }
.tool-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-l); box-shadow: var(--shadow-card);
  padding: 1.4rem;
}
@media (min-width: 720px) { .tool-card { padding: 2.2rem; } }

.tool-block { padding-block: 1.4rem; border-top: 1px solid var(--border); }
.tool-block:first-child { border-top: 0; padding-top: 0; }
.tool-block-head { display: flex; align-items: center; gap: .7rem; margin-bottom: 1rem; }
.step-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.7rem; height: 1.7rem; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); font-weight: 800; font-size: .85rem; flex-shrink: 0;
}
.tool-block-head h2 { font-size: 1.15rem; }

.field-label { display: block; font-size: .82rem; font-weight: 700; color: var(--text-dim); margin: 1rem 0 .4rem; text-transform: uppercase; letter-spacing: .03em; }
.field-label:first-child { margin-top: 0; }
.field-hint { font-size: .85rem; color: var(--text-dim); margin-top: .5rem; }

.text-input {
  width: 100%; padding: .75rem .9rem; border-radius: var(--radius-s);
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  font-size: .98rem; transition: border-color .15s;
}
.text-input:focus { border-color: var(--accent); }
.field-row { display: grid; gap: .9rem; }
@media (min-width: 540px) { .field-row { grid-template-columns: 1fr 1fr; } }
.checkbox-label { display: flex; align-items: center; gap: .5rem; font-size: .9rem; margin-top: .8rem; color: var(--text-dim); }

/* Mode tabs */
.mode-tabs { display: inline-flex; gap: .3rem; background: var(--surface-2); padding: .3rem; border-radius: 999px; margin-bottom: 1rem; }
.mode-tab { padding: .5rem 1.1rem; border-radius: 999px; font-weight: 700; font-size: .88rem; color: var(--text-dim); }
.mode-tab.is-active { background: var(--surface); color: var(--text); box-shadow: 0 1px 4px rgba(0,0,0,.08); }

/* Design grid */
.design-grid { display: grid; gap: 1.6rem; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 860px) { .design-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; } }
.design-col { min-width: 0; }

.style-swatches, .center-picker, .format-picker { display: flex; flex-wrap: wrap; gap: .5rem; }
.style-swatch, .center-opt {
  padding: .55rem 1rem; border-radius: var(--radius-s); border: 1px solid var(--border);
  background: var(--bg); font-size: .87rem; font-weight: 600; transition: all .15s;
}
.style-swatch.is-active, .center-opt.is-active {
  border-color: var(--accent); background: var(--accent-soft); color: var(--accent);
}
.format-opt {
  display: flex; align-items: center; gap: .6rem; padding: .8rem 1rem; border-radius: var(--radius-s);
  border: 1px solid var(--border); background: var(--bg); font-size: .9rem; font-weight: 600; width: 100%;
}
.format-opt .format-icon { font-size: 1.2rem; color: var(--text-dim); }
.format-opt.is-active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.format-opt.is-active .format-icon { color: var(--accent); }

.color-row { display: flex; gap: 1.2rem; }
.color-field { display: flex; flex-direction: column; align-items: center; gap: .4rem; font-size: .8rem; color: var(--text-dim); font-weight: 600; }
.color-field input[type="color"] {
  width: 46px; height: 46px; border-radius: 50%; border: 2px solid var(--border);
  padding: 0; overflow: hidden; cursor: pointer; background: none;
}

.center-sub { margin-top: .8rem; }
.emoji-input {
  width: 4rem; text-align: center; font-size: 1.4rem; padding: .5rem; border-radius: var(--radius-s);
  border: 1px solid var(--border); background: var(--bg); margin-bottom: .6rem;
}
.emoji-quick { display: flex; flex-wrap: wrap; gap: .4rem; }
.emoji-quick button { font-size: 1.25rem; padding: .3rem .5rem; border-radius: var(--radius-s); border: 1px solid var(--border); background: var(--bg); }
.emoji-quick button:hover { border-color: var(--accent); }
.upload-btn {
  display: inline-block; padding: .6rem 1rem; border-radius: var(--radius-s); border: 1px dashed var(--border);
  font-size: .87rem; font-weight: 600; cursor: pointer; color: var(--text-dim);
}
.upload-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Preview column */
.preview-col { display: flex; flex-direction: column; }
.qr-preview-wrap {
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-2); border-radius: var(--radius-m); padding: 1.2rem; min-height: 220px;
}
.qr-preview { width: 200px; height: 200px; }
.qr-preview canvas, .qr-preview img { max-width: 100%; height: auto; border-radius: 6px; }
.download-row { display: flex; gap: .6rem; margin-top: .9rem; flex-wrap: wrap; }
.download-row .btn { flex: 1 1 auto; }

/* 3D viewer */
.viewer-wrap {
  position: relative; background: var(--surface-2); border-radius: var(--radius-m);
  min-height: 280px; aspect-ratio: 4 / 3; overflow: hidden;
}
.viewer-wrap canvas { width: 100%; height: 100%; max-width: 100%; display: block; touch-action: none; }
.viewer-status {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: .85rem; color: var(--text-dim); text-align: center; padding: 1rem; z-index: 1;
  background: var(--surface-2);
}
.viewer-status.is-hidden { display: none; }

.print-warnings { display: flex; flex-direction: column; gap: .5rem; margin-top: 1rem; }
.warn-chip {
  display: flex; gap: .5rem; align-items: flex-start; padding: .6rem .8rem; border-radius: var(--radius-s);
  font-size: .83rem; line-height: 1.4;
}
.warn-chip.is-ok { background: rgba(47,125,79,.1); color: var(--success); }
.warn-chip.is-warn { background: rgba(184,121,26,.12); color: var(--warn); }
.warn-chip.is-danger { background: rgba(200,64,44,.12); color: var(--danger); }

.privacy-badge { margin-top: 1.6rem; font-size: .85rem; color: var(--text-dim); text-align: center; }
.limits-note { margin-top: .5rem; font-size: .78rem; color: var(--text-dim); text-align: center; opacity: .85; }

/* =============================================================
   8. Ad slots
   ============================================================= */
.ad-slot {
  display: flex; align-items: center; justify-content: center;
  border: 1px dashed var(--border); border-radius: var(--radius-m);
  color: var(--text-dim); font-size: .78rem; font-weight: 700; letter-spacing: .08em;
  background: var(--surface-2); text-transform: uppercase;
}
.ad-leaderboard { min-height: 90px; margin-block: 2rem; }
.ad-incontent { min-height: 250px; margin-block: 2rem; max-width: 640px; }
.ad-popup { min-height: 200px; margin-block: 1rem; border-radius: var(--radius-s); }

.corner-toast {
  position: fixed; bottom: 1rem; right: 1rem; z-index: 500;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-m);
  box-shadow: var(--shadow-card); padding: .7rem 2.2rem .7rem .9rem;
  opacity: 0; transform: translateY(12px); pointer-events: none;
  transition: opacity .3s var(--ease-out), transform .3s var(--ease-out);
}
.corner-toast.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.corner-toast-close {
  position: absolute; top: .35rem; right: .5rem; font-size: 1rem; color: var(--text-dim); line-height: 1;
  width: 1.4rem; height: 1.4rem;
}
.ad-slot-inline {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 140px; min-height: 40px;
  border: 1px dashed var(--border); border-radius: var(--radius-s);
  font-size: .7rem; font-weight: 700; letter-spacing: .06em; color: var(--text-dim);
}

.download-dialog {
  border: none; border-radius: var(--radius-l); padding: 1.6rem;
  max-width: 380px; width: calc(100% - 2rem); box-shadow: 0 24px 60px -20px rgba(0,0,0,.35);
  background: var(--surface); color: var(--text);
}
.download-dialog::backdrop { background: rgba(15,14,12,.55); }
.dialog-close {
  position: absolute; top: .8rem; right: 1rem; font-size: 1.3rem; color: var(--text-dim); line-height: 1;
}
.dialog-kicker { font-weight: 700; margin-bottom: .8rem; padding-right: 1.5rem; }
.dialog-continue { width: 100%; margin-top: .8rem; }

/* =============================================================
   9. Content sections
   ============================================================= */
.how-section, .usos-section, .faq-section, .seo-section, .cta-section { padding-block: 2.6rem; }
.how-section h2, .usos-section h2, .faq-section h2, .seo-section h2, .cta-section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 1.6rem; text-align: center;
}
.how-grid { display: grid; gap: 1.4rem; }
@media (min-width: 720px) { .how-grid { grid-template-columns: repeat(3, 1fr); } }
.how-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-m); padding: 1.5rem; }
.how-num { font-family: var(--display); font-size: 1.6rem; font-weight: 800; color: var(--accent); margin-bottom: .5rem; }
.how-card h3 { font-size: 1.1rem; margin-bottom: .4rem; }
.how-card p { color: var(--text-dim); font-size: .92rem; }

.seo-section { max-width: 760px; margin-inline: auto; }
.seo-section p { color: var(--text-dim); margin-bottom: 1rem; }
.seo-section h2 { text-align: left; }

.usos-grid { display: grid; gap: 1.2rem; grid-template-columns: 1fr; }
@media (min-width: 620px) { .usos-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) { .usos-grid { grid-template-columns: repeat(3, 1fr); } }
.uso-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-m); padding: 1.3rem; }
.uso-icon { font-size: 1.6rem; margin-bottom: .5rem; display: block; }
.uso-card h3 { font-size: 1.02rem; margin-bottom: .35rem; }
.uso-card p { color: var(--text-dim); font-size: .88rem; }

.faq-list { max-width: 760px; margin-inline: auto; display: flex; flex-direction: column; gap: .7rem; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-m); overflow: hidden; }
.faq-item summary {
  padding: 1rem 1.2rem; font-weight: 700; cursor: pointer; list-style: none; display: flex;
  align-items: center; justify-content: space-between; gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; color: var(--accent); flex-shrink: 0; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 1.2rem 1.1rem; color: var(--text-dim); font-size: .92rem; }

.cta-section { text-align: center; }
.cta-section p { color: var(--text-dim); margin-bottom: 1.2rem; }

/* =============================================================
   10. Footer
   ============================================================= */
.site-footer { border-top: 1px solid var(--border); padding-block: 1.6rem; margin-top: 1rem; }
.footer-row { display: flex; flex-direction: column; gap: .7rem; align-items: center; text-align: center; font-size: .85rem; color: var(--text-dim); }
.footer-row nav { display: flex; gap: 1.2rem; }
.footer-row nav a:hover { color: var(--accent); }
@media (min-width: 620px) { .footer-row { flex-direction: row; justify-content: space-between; text-align: left; } }

/* =============================================================
   11. Responsive misc
   ============================================================= */
@media (min-width: 540px)  { .tool-card { padding: 1.8rem; } }
@media (min-width: 1280px) { .container { padding-inline: 1.5rem; } }