/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --surface-2: #f0eee8;
  --border: #e2ded4;
  --text: #211f1c;
  --text-soft: #5d584f;
  --text-faint: #8b8577;
  --accent: #1f6f5c;
  --accent-dark: #164f41;
  --accent-soft: #e4f0ec;
  --danger: #b3402a;
  --danger-soft: #fbe9e4;
  --warn: #9a6a12;
  --warn-soft: #fbf0da;
  --ok: #1f6f5c;
  --ad-bg: #eeece6;
  --ad-border: #c8c2b2;
  --ad-text: #8b8577;
  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;
  --shadow-s: 0 1px 3px rgba(30, 27, 20, .08);
  --shadow-m: 0 8px 28px rgba(30, 27, 20, .10);
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --display: "Fraunces", Georgia, serif;
  --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171613;
    --surface: #201e1a;
    --surface-2: #26241f;
    --border: #38352d;
    --text: #f2efe7;
    --text-soft: #c7c1b3;
    --text-faint: #8b8577;
    --accent: #4bbfa1;
    --accent-dark: #6fd4b9;
    --accent-soft: #1d2e29;
    --danger: #e07a5f;
    --danger-soft: #33211d;
    --warn: #e0b25f;
    --warn-soft: #332a19;
    --ad-bg: #221f1a;
    --ad-border: #423d33;
    --ad-text: #8b8577;
  }
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  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 { text-wrap: balance; line-height: 1.12; letter-spacing: -0.01em; font-family: var(--display); font-weight: 600; }
ul { list-style: none; padding: 0; }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.skip-link {
  position: fixed; top: -100px; left: 1rem; z-index: 9999;
  padding: .6rem 1rem; background: var(--text); color: var(--bg);
  border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

.container { max-width: 1120px; margin-inline: auto; padding-inline: 1.25rem; }

/* =============================================================
   3. Utilities
   ============================================================= */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.eyebrow {
  font-family: var(--mono); font-size: .78rem; letter-spacing: .08em;
  text-transform: uppercase; color: var(--accent); font-weight: 600;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .85rem 1.4rem; border-radius: 999px; font-weight: 600; font-size: .96rem;
  transition: transform .18s var(--ease-out), background .18s var(--ease-out), box-shadow .18s var(--ease-out);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: var(--shadow-s); }
.btn-primary:hover { background: var(--accent-dark); box-shadow: var(--shadow-m); }
.btn-secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); }
.btn-ghost { background: transparent; color: var(--text-soft); border: 1px solid var(--border); }
.btn-sm { padding: .55rem 1rem; font-size: .86rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* =============================================================
   4. Header
   ============================================================= */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding-block: .85rem; }
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 700; font-size: 1.05rem; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--accent);
  display: grid; place-items: center; color: #fff; font-size: .85rem; font-family: var(--mono); font-weight: 700;
  flex-shrink: 0;
}
.header-nav { display: flex; align-items: center; gap: 1.4rem; }
.header-nav a { font-size: .92rem; color: var(--text-soft); font-weight: 500; }
.header-nav a:hover { color: var(--accent); }
.header-nav a.btn { color: #fff; }
@media (max-width: 539px) { .header-nav .nav-link { display: none; } }

/* =============================================================
   5. Hero + tool
   ============================================================= */
.hero { padding-block: 2.4rem 1rem; text-align: center; }
.hero h1 {
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  max-width: 20ch; margin-inline: auto;
}
.hero .subtitle {
  margin-top: .9rem; color: var(--text-soft); font-size: clamp(1rem, 1.6vw, 1.18rem);
  max-width: 46ch; margin-inline: auto;
}

.tool-section { padding-block: 1.2rem 2rem; }
.tool-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-l);
  box-shadow: var(--shadow-m); padding: clamp(1rem, 3vw, 2rem);
}

.mode-tabs { display: flex; gap: .5rem; margin-bottom: 1.4rem; border-bottom: 1px solid var(--border); }
.mode-tab {
  padding: .7rem 1.1rem; font-weight: 600; color: var(--text-faint); border-bottom: 2px solid transparent;
  margin-bottom: -1px; transition: color .15s var(--ease-out), border-color .15s var(--ease-out);
}
.mode-tab[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }

.tool-grid { display: grid; grid-template-columns: 1fr; gap: 1.6rem; }
@media (min-width: 960px) { .tool-grid { grid-template-columns: 1.05fr .95fr; align-items: start; } }

.field-group { margin-bottom: 1.1rem; }
.field-group:last-child { margin-bottom: 0; }
.field-label {
  display: block; font-size: .84rem; font-weight: 600; color: var(--text-soft); margin-bottom: .4rem;
}
.field-hint { font-size: .78rem; color: var(--text-faint); margin-top: .3rem; }
input[type="text"], input[type="url"], input[type="password"], input[type="number"], textarea, select {
  width: 100%; padding: .72rem .9rem; border-radius: var(--radius-s); border: 1px solid var(--border);
  background: var(--surface-2); color: var(--text); font: inherit; font-size: .94rem;
  transition: border-color .15s var(--ease-out);
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); }
textarea { resize: vertical; min-height: 4.2rem; }

.segmented { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; padding: 3px; gap: 2px; }
.segmented button {
  padding: .45rem .95rem; border-radius: 999px; font-size: .84rem; font-weight: 600; color: var(--text-soft);
}
.segmented button[aria-pressed="true"] { background: var(--accent); color: #fff; }

.content-mode-panel[hidden] { display: none; }

.style-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .5rem; }
@media (max-width: 539px) { .style-grid { grid-template-columns: repeat(2, 1fr); } }
.style-opt {
  border: 1px solid var(--border); border-radius: var(--radius-s); padding: .55rem .4rem;
  display: flex; flex-direction: column; align-items: center; gap: .35rem; background: var(--surface-2);
}
.style-opt svg { width: 30px; height: 30px; }
.style-opt span { font-size: .74rem; font-weight: 600; color: var(--text-soft); }
.style-opt[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); }
.style-opt[aria-pressed="true"] span { color: var(--accent); }

.color-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.color-field { display: flex; align-items: center; gap: .55rem; }
.color-field input[type="color"] {
  width: 40px; height: 40px; border-radius: 50%; border: 2px solid var(--border); padding: 0; cursor: pointer;
  background: none;
}
.color-field label { font-size: .84rem; font-weight: 600; color: var(--text-soft); }

.emoji-row { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .5rem; }
.emoji-btn {
  width: 36px; height: 36px; border-radius: var(--radius-s); border: 1px solid var(--border); font-size: 1.15rem;
  display: grid; place-items: center; background: var(--surface-2);
}
.emoji-btn[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); }
.logo-actions { display: flex; align-items: center; gap: .6rem; margin-top: .5rem; flex-wrap: wrap; }
.file-drop {
  display: inline-flex; align-items: center; gap: .5rem; padding: .55rem .9rem; border: 1px dashed var(--border);
  border-radius: var(--radius-s); font-size: .84rem; font-weight: 600; color: var(--text-soft); cursor: pointer;
}
.file-drop:hover { border-color: var(--accent); color: var(--accent); }

/* preview column */
.preview-col { display: flex; flex-direction: column; gap: 1rem; }
.preview-box {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-m);
  display: grid; place-items: center; padding: 1.2rem; min-height: 260px;
}
.preview-box canvas, .preview-box svg { max-width: 100%; }
#qrPreviewWrap, #barcodePreviewWrap { display: grid; place-items: center; width: 100%; }
.download-row { display: flex; gap: .6rem; flex-wrap: wrap; }
.privacy-badge {
  display: flex; align-items: flex-start; gap: .5rem; font-size: .82rem; color: var(--text-soft);
  background: var(--accent-soft); border-radius: var(--radius-s); padding: .7rem .85rem;
}
.limits-note { font-size: .78rem; color: var(--text-faint); }

/* =============================================================
   6. 3D print section
   ============================================================= */
.print3d-section { margin-top: 1.6rem; padding-top: 1.6rem; border-top: 1px solid var(--border); }
.print3d-header { display: flex; align-items: center; gap: .6rem; margin-bottom: 1rem; }
.print3d-header h2 { font-size: 1.3rem; }
.badge-3d {
  font-family: var(--mono); font-size: .68rem; font-weight: 700; letter-spacing: .04em;
  background: var(--accent); color: #fff; border-radius: 999px; padding: .2rem .55rem;
}

.print3d-grid { display: grid; grid-template-columns: 1fr; gap: 1.4rem; }
@media (min-width: 960px) { .print3d-grid { grid-template-columns: .95fr 1.05fr; } }

.shape-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .6rem; }
@media (max-width: 539px) { .shape-grid { grid-template-columns: 1fr; } }
.shape-opt {
  border: 1px solid var(--border); border-radius: var(--radius-m); padding: .8rem .6rem; background: var(--surface-2);
  display: flex; flex-direction: column; align-items: center; gap: .4rem; text-align: center;
}
.shape-opt svg { width: 44px; height: 34px; }
.shape-opt strong { font-size: .84rem; }
.shape-opt span { font-size: .72rem; color: var(--text-faint); }
.shape-opt[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); }

.viewer-wrap {
  position: relative; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-m);
  aspect-ratio: 4 / 3; overflow: hidden;
}
.viewer-wrap canvas { width: 100%; height: 100%; display: block; touch-action: none; }
.viewer-hint {
  position: absolute; bottom: .6rem; left: 50%; transform: translateX(-50%);
  font-size: .72rem; color: var(--text-faint); background: color-mix(in srgb, var(--surface) 85%, transparent);
  padding: .3rem .7rem; border-radius: 999px; pointer-events: none;
}
.viewer-status {
  position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 1rem;
  font-size: .86rem; color: var(--text-soft); background: var(--surface-2);
}
.viewer-status[hidden] { display: none; }

.warnings-list { display: flex; flex-direction: column; gap: .5rem; margin-top: .9rem; }
.warning-item {
  display: flex; gap: .55rem; align-items: flex-start; font-size: .82rem; padding: .55rem .7rem; border-radius: var(--radius-s);
}
.warning-item.ok { background: var(--accent-soft); color: var(--accent-dark); }
.warning-item.warn { background: var(--warn-soft); color: var(--warn); }
.warning-item.danger { background: var(--danger-soft); color: var(--danger); }
.warning-item svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: .15rem; }

.print3d-download { display: flex; flex-direction: column; gap: .6rem; margin-top: 1.1rem; }
.print3d-download .btn { width: 100%; }
.secondary-download { font-size: .82rem; color: var(--text-faint); text-align: center; }
.secondary-download a, .secondary-download button { color: var(--accent); font-weight: 600; text-decoration: underline; }

/* =============================================================
   7. Ad slots
   ============================================================= */
.ad-slot {
  border: 1px dashed var(--ad-border); border-radius: var(--radius-m); background: var(--ad-bg);
  display: flex; align-items: center; justify-content: center; color: var(--ad-text);
  font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  font-family: var(--mono);
}
.ad-slot::before { content: "ANUNCIO"; }
.ad-leaderboard { min-height: 90px; margin-block: 2rem; }
.ad-incontent { min-height: 250px; margin-block: 2.4rem; max-width: 560px; margin-inline: auto; }
.ad-footer-slot { min-height: 90px; margin-block: 2rem; }

/* corner notice */
.ad-corner {
  position: fixed; right: 1rem; bottom: 1rem; z-index: 60; width: 220px;
  border: 1px dashed var(--ad-border); background: var(--ad-bg); border-radius: var(--radius-m);
  padding: .8rem .9rem .9rem; box-shadow: var(--shadow-m);
  transform: translateY(140%); transition: transform .35s var(--ease-out);
}
.ad-corner.is-visible { transform: translateY(0); }
.ad-corner-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: .35rem; }
.ad-corner-label {
  font-family: var(--mono); font-size: .68rem; font-weight: 700; letter-spacing: .06em; color: var(--ad-text);
}
.ad-corner-close {
  width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; color: var(--text-faint);
  font-size: .9rem; line-height: 1;
}
.ad-corner-close:hover { background: var(--surface); color: var(--text); }
.ad-corner-body {
  min-height: 60px; border-radius: var(--radius-s); background: var(--surface); display: grid; place-items: center;
  color: var(--ad-text); font-size: .72rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
  font-family: var(--mono);
}
.ad-corner-body::before { content: "ANUNCIO"; }

/* download popup dialog */
#downloadDialog { border: none; border-radius: var(--radius-l); padding: 0; max-width: 380px; width: calc(100% - 2rem); box-shadow: var(--shadow-m); background: var(--surface); color: var(--text); }
#downloadDialog::backdrop { background: rgba(20, 18, 14, .55); backdrop-filter: blur(2px); }
.dialog-inner { padding: 1.4rem; text-align: center; }
.dialog-close {
  position: absolute; top: .7rem; right: .7rem; width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center; font-size: 1.1rem; color: var(--text-faint);
}
#downloadDialog { position: relative; }
.dialog-close:hover { background: var(--surface-2); color: var(--text); }
.dialog-inner .ad-slot { min-height: 200px; margin-block: 1rem 1.2rem; }
.dialog-inner h3 { font-size: 1.05rem; margin-bottom: .3rem; }
.dialog-inner p { font-size: .86rem; color: var(--text-soft); margin-bottom: .2rem; }

/* =============================================================
   8. Content sections
   ============================================================= */
.section { padding-block: 2.6rem; }
.section-head { text-align: center; max-width: 620px; margin-inline: auto; margin-bottom: 2rem; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
.section-head p { color: var(--text-soft); margin-top: .6rem; }

.steps-grid { display: grid; grid-template-columns: 1fr; gap: 1.2rem; }
@media (min-width: 720px) { .steps-grid { grid-template-columns: repeat(3, 1fr); } }
.step-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-m); padding: 1.4rem; }
.step-card .step-icon {
  width: 42px; height: 42px; border-radius: var(--radius-s); background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center; margin-bottom: .8rem;
}
.step-card h3 { font-size: 1.05rem; margin-bottom: .4rem; }
.step-card p { color: var(--text-soft); font-size: .92rem; }

.seo-copy { max-width: 720px; margin-inline: auto; color: var(--text-soft); }
.seo-copy h2 { color: var(--text); font-size: 1.4rem; margin-bottom: .8rem; }
.seo-copy p { margin-bottom: 1rem; }
.seo-copy strong { color: var(--text); }

.ideas-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
@media (min-width: 720px) { .ideas-grid { grid-template-columns: repeat(4, 1fr); } }
.idea-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-m); padding: 1.1rem;
  text-align: center;
}
.idea-card .idea-emoji { font-size: 1.7rem; margin-bottom: .5rem; }
.idea-card h3 { font-size: .95rem; margin-bottom: .35rem; }
.idea-card p { font-size: .82rem; color: var(--text-soft); }

.faq-list { max-width: 760px; margin-inline: auto; display: flex; flex-direction: column; gap: .6rem; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-m); padding: .2rem 1.1rem; }
.faq-item summary {
  cursor: pointer; padding: 1rem 0; font-weight: 600; font-size: .98rem; list-style: none;
  display: flex; justify-content: space-between; align-items: center; 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-bottom: 1rem; color: var(--text-soft); font-size: .92rem; }

.more-tools { text-align: center; }
.more-tools-grid { display: grid; grid-template-columns: 1fr; gap: .8rem; max-width: 640px; margin-inline: auto; }
@media (min-width: 720px) { .more-tools-grid { grid-template-columns: repeat(3, 1fr); } }
.more-tool-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-m); padding: 1rem;
  font-size: .86rem; color: var(--text-faint);
}
.more-tool-card strong { display: block; color: var(--text-soft); margin-bottom: .2rem; }

/* =============================================================
   9. Footer
   ============================================================= */
.site-footer { border-top: 1px solid var(--border); padding-block: 2rem; margin-top: 1rem; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; }
.footer-links { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.footer-links a { font-size: .84rem; color: var(--text-faint); }
.footer-links a:hover { color: var(--accent); }
.footer-note { font-size: .78rem; color: var(--text-faint); }

/* =============================================================
   10. Responsive
   ============================================================= */
@media (max-width: 539px) {
  .container { padding-inline: 1rem; }
  .tool-card { padding: 1rem; }
}

/* =============================================================
   11. Reduced motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .ad-corner { transition: none; }
}