/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg: #F5F1E6;
  --bg-elev: #FFFDF9;
  --ink: #191A17;
  --ink-soft: #6E6A57;
  --line: #DED5BE;
  --line-strong: #C9BE9E;
  --accent: #E24E1E;
  --accent-ink: #FFFDF9;
  --accent-soft: #FBDCC7;
  --accent-2: #0E7C6B;
  --accent-2-soft: #D3EBE6;
  --accent-3: #D9941F;
  --accent-3-soft: #F8E4BC;
  --accent-4: #6355C6;
  --accent-4-soft: #E2DFF6;
  --ok: #0E7C6B;
  --warn: #C41E3A;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --display: "Space Grotesk", var(--sans);
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "Courier New", monospace;
  --script: "Caveat", cursive;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 2px rgba(25,26,23,.08);
  --shadow-md: 0 10px 28px rgba(25,26,23,.10);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --grid-dot: color-mix(in srgb, var(--ink) 14%, transparent);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15161A;
    --bg-elev: #1D1F26;
    --ink: #F0EEE6;
    --ink-soft: #A5A296;
    --line: #303240;
    --line-strong: #40434F;
    --accent-soft: #3D2A20;
    --accent-2-soft: #16332E;
    --accent-3-soft: #3A2E14;
    --accent-4-soft: #262143;
    --grid-dot: color-mix(in srgb, var(--ink) 10%, transparent);
  }
}
:root[data-theme="dark"] {
  --bg: #15161A;
  --bg-elev: #1D1F26;
  --ink: #F0EEE6;
  --ink-soft: #A5A296;
  --line: #303240;
  --line-strong: #40434F;
  --accent-soft: #3D2A20;
  --accent-2-soft: #16332E;
  --accent-3-soft: #3A2E14;
  --accent-4-soft: #262143;
  --grid-dot: color-mix(in srgb, var(--ink) 10%, transparent);
}

/* =============================================================
   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-color: var(--bg);
  background-image: radial-gradient(var(--grid-dot) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video, canvas { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
input, select { font: inherit; color: inherit; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.1; letter-spacing: -0.01em; font-family: var(--display); }
::selection { background: var(--accent); color: var(--accent-ink); }

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

/* =============================================================
   3. Utilities
   ============================================================= */
.container { max-width: 1120px; margin: 0 auto; padding: 0 1.25rem; }

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

.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap;
}

.eyebrow {
  display: flex; align-items: center; gap: .5rem;
  font-family: var(--mono); font-size: .72rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent);
  margin-bottom: .6rem;
}
.eyebrow::before { content: "//"; opacity: .55; }
.eyebrow--center { justify-content: center; }

/* Technical corner brackets — the site's signature detail */
.corner-frame { position: relative; }
.corner-frame::before, .corner-frame::after {
  content: ""; position: absolute; width: 11px; height: 11px; pointer-events: none;
  border-color: var(--accent); opacity: .45; transition: opacity .15s var(--ease-out);
}
.corner-frame::before { top: -1px; left: -1px; border-top: 2px solid; border-left: 2px solid; }
.corner-frame::after { bottom: -1px; right: -1px; border-bottom: 2px solid; border-right: 2px solid; }
.corner-frame:hover::before, .corner-frame:hover::after,
.corner-frame.is-active::before, .corner-frame.is-active::after { opacity: .9; }

.build-plate {
  background-color: var(--bg);
  background-image: radial-gradient(var(--grid-dot) 1px, transparent 1px);
  background-size: 14px 14px;
}

/* =============================================================
   4. Buttons
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .7rem 1.2rem; border-radius: var(--radius-sm);
  font-family: var(--mono); font-weight: 600; font-size: .82rem;
  letter-spacing: .03em; text-transform: uppercase;
  transition: transform .15s var(--ease-out), background .15s var(--ease-out), box-shadow .15s var(--ease-out), border-color .15s var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: var(--shadow-sm); }
.btn-primary:hover { box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--bg-elev); color: var(--ink); border: 1px solid var(--line-strong); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-ghost { background: transparent; color: var(--ink-soft); border: 1px dashed var(--line-strong); }
.btn-ghost:hover { color: var(--ink); border-color: var(--ink-soft); }
.btn-sm { padding: .45rem .8rem; font-size: .85rem; }
.btn-lg { padding: .9rem 1.6rem; font-size: 1.02rem; }

/* =============================================================
   5. 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(--line-strong);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: .9rem 1.25rem; }
.logo { display: flex; align-items: center; gap: .5rem; font-family: var(--display); font-weight: 700; font-size: 1.05rem; }
.logo-mark { color: var(--accent); display: inline-flex; line-height: 0; }
.header-nav { display: none; gap: 1.5rem; font-family: var(--mono); font-weight: 500; font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-soft); }
.header-nav a:hover { color: var(--accent); }
@media (min-width: 720px) { .header-nav { display: flex; } }

.filament-strip { display: flex; width: 100%; height: 8px; }
.filament-strip span { flex: 1 1 0; }
.filament-strip span:nth-child(1)  { background: var(--accent); }
.filament-strip span:nth-child(2)  { background: #F0A93A; }
.filament-strip span:nth-child(3)  { background: var(--accent-3); }
.filament-strip span:nth-child(4)  { background: #8FA33E; }
.filament-strip span:nth-child(5)  { background: var(--accent-2); }
.filament-strip span:nth-child(6)  { background: #2FA6A0; }
.filament-strip span:nth-child(7)  { background: #3D7DD8; }
.filament-strip span:nth-child(8)  { background: var(--accent-4); }
.filament-strip span:nth-child(9)  { background: #C4487A; }
.filament-strip span:nth-child(10) { background: #D9754F; }

/* =============================================================
   6. Hero
   ============================================================= */
.hero { position: relative; padding: 2.6rem 1.25rem 1.4rem; text-align: center; max-width: 760px; display: flex; flex-direction: column; align-items: center; }
.hero h1 { font-size: clamp(1.8rem, 4.5vw, 2.7rem); font-weight: 700; }
.hero-sub { margin-top: .9rem; color: var(--ink-soft); font-size: clamp(1rem, 2vw, 1.15rem); }

.hero-mascot { display: none; position: absolute; top: -6px; right: -8px; width: 128px; pointer-events: none; }
.hero-mascot svg { width: 100%; height: auto; }
@media (min-width: 1020px) { .hero-mascot { display: block; right: -48px; } }
@media (min-width: 1200px) { .hero-mascot { right: -96px; width: 148px; } }
.mascot-arm { transform-origin: 130px 74px; animation: mascotWave 2.6s ease-in-out infinite; }
@keyframes mascotWave {
  0%, 100% { transform: rotate(0deg); }
  20% { transform: rotate(-16deg); }
  40% { transform: rotate(-4deg); }
  60% { transform: rotate(-14deg); }
  80% { transform: rotate(0deg); }
}
@media (prefers-reduced-motion: reduce) {
  .mascot-arm { animation: none; transform: rotate(-14deg); }
}

.washi-row { display: flex; gap: .8rem; flex-wrap: wrap; justify-content: center; margin-top: 1.1rem; }
.washi-tape {
  font-family: var(--mono); font-size: .7rem; font-weight: 600; letter-spacing: .07em; text-transform: uppercase;
  padding: .4rem .85rem; color: var(--ink); box-shadow: var(--shadow-sm);
  clip-path: polygon(2.5% 0, 97.5% 0, 100% 100%, 0 100%);
}
.washi-tape--1 { background: var(--accent-2-soft); transform: rotate(-3deg); }
.washi-tape--2 { background: var(--accent-3-soft); transform: rotate(2.5deg); }

.hand-note {
  display: inline-flex; align-items: center; gap: .35rem;
  font-family: var(--script); font-size: 1.35rem; font-weight: 600; color: var(--accent);
  line-height: 1; white-space: nowrap;
}
.hand-note svg { width: 30px; height: 26px; flex-shrink: 0; color: var(--accent); }
.hand-note--field { align-self: flex-end; margin-bottom: -.3rem; transform: rotate(-2deg); }
.hand-note--cta { align-self: center; margin-bottom: .2rem; transform: rotate(2deg); }

/* =============================================================
   7. Tool card
   ============================================================= */
.tool-section { padding-bottom: 2rem; }
.tool-card {
  background-color: var(--bg-elev);
  background-image: radial-gradient(color-mix(in srgb, var(--ink) 14%, transparent) 1.1px, transparent 1.1px);
  background-size: 6px 6px;
  border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: 1.4rem 1.2rem; box-shadow: var(--shadow-md);
  display: flex; flex-direction: column; gap: 1.6rem;
}
@media (min-width: 720px) { .tool-card { padding: 2rem 1.8rem; } }

.tool-block { display: flex; flex-direction: column; gap: .9rem; }
.tool-block + .tool-block { border-top: 1px solid var(--line); padding-top: 1.6rem; }
.tool-block-head { display: flex; align-items: center; gap: .6rem; }
.tool-block-head h2 { font-size: 1.1rem; font-weight: 700; }
.step-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.7rem; height: 1.7rem; border-radius: 50%; background: var(--accent-soft); color: var(--accent);
  font-weight: 800; font-size: .85rem; flex-shrink: 0;
}

.content-tabs { display: flex; gap: .5rem; }
.tab-btn {
  padding: .55rem 1.1rem; border-radius: var(--radius-sm); border: 1px solid var(--line-strong);
  font-family: var(--mono); font-weight: 600; font-size: .78rem; letter-spacing: .03em; text-transform: uppercase;
  color: var(--ink-soft);
  transition: background .15s var(--ease-out), color .15s var(--ease-out), border-color .15s var(--ease-out);
}
.tab-btn.is-active { background: var(--ink); color: var(--bg); border-color: var(--ink); }

.field-label { display: block; font-size: .82rem; font-weight: 600; color: var(--ink-soft); margin-bottom: .4rem; }
.text-input {
  width: 100%; padding: .75rem .9rem; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--bg); font-size: .98rem; transition: border-color .15s var(--ease-out);
}
.text-input:focus-visible { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.field-row { display: grid; gap: .9rem; grid-template-columns: 1fr; margin-top: .8rem; }
@media (min-width: 540px) { .field-row { grid-template-columns: 1fr 1fr; } }
.content-pane { margin-top: .6rem; }

.design-grid { display: grid; gap: 1.6rem; grid-template-columns: 1fr; }
@media (min-width: 900px) { .design-grid { grid-template-columns: 1.05fr .95fr; } }

.style-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .6rem; }
@media (min-width: 480px) { .style-grid { grid-template-columns: repeat(4, 1fr); } }
.style-opt {
  display: flex; flex-direction: column; align-items: center; gap: .4rem;
  padding: .6rem .4rem; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: .78rem; font-weight: 600; color: var(--ink-soft); background: var(--bg);
  transition: border-color .15s var(--ease-out), color .15s var(--ease-out);
}
.style-opt svg { width: 34px; height: 34px; }
.style-opt.is-active { border-color: var(--accent); color: var(--ink); background: var(--accent-soft); }

.color-presets { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: .9rem; }
.color-preset-swatch {
  width: 36px; height: 36px; border-radius: var(--radius-sm); border: 2px solid var(--line);
  overflow: hidden; display: flex; box-shadow: var(--shadow-sm);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 30% 100%, 0 70%);
}
.color-preset-swatch.is-active { border-color: var(--accent); }
.color-preset-swatch span { flex: 1; }

.color-input-wrap { display: flex; align-items: center; gap: .5rem; }
.color-input-wrap input[type=color] {
  width: 2.6rem; height: 2.6rem; border-radius: var(--radius-sm); border: 1px solid var(--line);
  padding: 0; background: none; flex-shrink: 0; cursor: pointer;
}
.hex-input { text-transform: uppercase; font-family: monospace; }

.contrast-warning {
  margin-top: .6rem; padding: .6rem .8rem; border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--warn) 12%, transparent); color: var(--warn); font-size: .85rem; font-weight: 600;
}

.center-picker { display: flex; flex-direction: column; gap: .7rem; }
.emoji-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: .35rem; max-width: 340px; }
@media (max-width: 400px) { .emoji-grid { grid-template-columns: repeat(6, 1fr); } }
.emoji-opt {
  aspect-ratio: 1; display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm); border: 1px solid var(--line); font-size: 1.1rem; background: var(--bg);
}
.emoji-opt.is-active { border-color: var(--accent); background: var(--accent-soft); }
.logo-upload { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }

.preview-col { display: flex; flex-direction: column; }
.qr-preview-wrap { display: flex; justify-content: center; align-items: center; border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 1rem; min-height: 220px; }
.qr-preview canvas, .qr-preview svg { max-width: 240px; width: 100%; height: auto; border-radius: 4px; box-shadow: var(--shadow-md); }
.image-downloads { display: flex; gap: .6rem; margin-top: 1rem; flex-wrap: wrap; }

.format-grid { display: grid; grid-template-columns: 1fr; gap: .8rem; }
@media (min-width: 720px) { .format-grid { grid-template-columns: repeat(3, 1fr); } }
.format-opt {
  text-align: left; padding: 1rem; border: 1px solid var(--line-strong); border-radius: var(--radius);
  background: var(--bg-elev); display: flex; flex-direction: column; gap: .5rem;
  transition: border-color .15s var(--ease-out), background .15s var(--ease-out);
}
.format-opt.is-active { border-color: var(--accent); background: var(--accent-soft); }
.format-opt-icon { color: var(--accent); }
.format-opt h3 { font-family: var(--display); font-size: 1rem; font-weight: 600; }
.format-opt p { font-size: .82rem; color: var(--ink-soft); line-height: 1.45; }

/* Format cards: each print format gets its own accent (a small catalog-style color code) */
.format-opt--soporte .format-opt-icon { color: var(--accent); }
.format-opt--soporte.is-active { border-color: var(--accent); background: var(--accent-soft); }
.format-opt--soporte::before, .format-opt--soporte::after { border-color: var(--accent); }
.format-opt--llavero .format-opt-icon { color: var(--accent-3); }
.format-opt--llavero.is-active { border-color: var(--accent-3); background: var(--accent-3-soft); }
.format-opt--llavero::before, .format-opt--llavero::after { border-color: var(--accent-3); }
.format-opt--placa .format-opt-icon { color: var(--accent-2); }
.format-opt--placa.is-active { border-color: var(--accent-2); background: var(--accent-2-soft); }
.format-opt--placa::before, .format-opt--placa::after { border-color: var(--accent-2); }

.preview3d-wrap { margin-top: 1.1rem; display: flex; flex-direction: column; gap: .8rem; }
.preview3d-canvas-wrap {
  position: relative; width: 100%; aspect-ratio: 16/10; max-height: 420px;
  border: 1px solid var(--line-strong); border-radius: var(--radius); overflow: hidden;
}
.preview3d-canvas-wrap.build-plate {
  background-image:
    radial-gradient(circle at 50% 30%, transparent, color-mix(in srgb, var(--ink) 6%, transparent) 92%),
    radial-gradient(var(--grid-dot) 1px, transparent 1px);
  background-size: auto, 14px 14px;
}
.preview3d-canvas-wrap canvas { width: 100%; height: 100%; display: block; touch-action: none; }
.preview3d-status {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--ink-soft); font-size: .9rem; font-weight: 600; background: var(--bg); transition: opacity .25s var(--ease-out);
}
.preview3d-status[hidden] { display: none; }
.drag-hint {
  position: absolute; bottom: .6rem; left: 50%; transform: translateX(-50%);
  font-size: .75rem; color: var(--ink-soft); background: color-mix(in srgb, var(--bg-elev) 85%, transparent);
  padding: .3rem .7rem; border-radius: 999px; pointer-events: none;
}

.print-warnings { display: flex; flex-direction: column; gap: .4rem; }
.print-warning {
  padding: .55rem .8rem; border-radius: var(--radius-sm); font-size: .84rem; font-weight: 600;
  display: flex; gap: .5rem; align-items: flex-start;
}
.print-warning.is-bad { background: color-mix(in srgb, var(--warn) 12%, transparent); color: var(--warn); }
.print-warning.is-good { background: color-mix(in srgb, var(--ok) 12%, transparent); color: var(--ok); }

.badge-row { margin-top: .3rem; }
.privacy-badge { display: inline-block; font-size: .85rem; color: var(--ink-soft); }
.limits-note { font-size: .82rem; color: var(--ink-soft); }
.download-3d-row { display: flex; gap: .7rem; flex-wrap: wrap; margin-top: .4rem; }
.download-3d-row .btn { flex: 1 1 220px; white-space: normal; text-align: center; }

/* =============================================================
   8. Ad slots (placeholders only)
   ============================================================= */
.ad-slot {
  border: 1px dashed var(--line); border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-soft); background: color-mix(in srgb, var(--ink) 3%, var(--bg));
  margin: 1.6rem 0; position: relative;
}
.ad-slot-label {
  font-family: var(--mono); font-size: .72rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-soft); opacity: .6;
}
.ad-slot--live { border: none; background: none; align-items: stretch; }
.ad-slot--live ins.adsbygoogle { min-height: inherit; }
.ad-slot--leaderboard { min-height: 90px; }
.ad-slot--incontent { min-height: 250px; max-width: 728px; margin-inline: auto; }
.ad-slot--popup { min-height: 250px; width: 300px; margin: 1rem auto; }
.ad-slot--corner { min-height: 100px; width: 100%; }

/* =============================================================
   9. Content sections
   ============================================================= */
.content-section { padding: 2.6rem 1.25rem; }
.section-title { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 700; margin-bottom: 1.4rem; text-align: center; }

.steps-grid { display: grid; gap: 1.2rem; grid-template-columns: 1fr; }
@media (min-width: 720px) { .steps-grid { grid-template-columns: repeat(3, 1fr); } }
.step-card {
  background: var(--bg-elev); border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: 1.4rem; display: flex; flex-direction: column; gap: .6rem;
}
.step-ghost-num {
  position: absolute; top: .5rem; right: .8rem;
  font-family: var(--mono); font-size: 2.1rem; font-weight: 600;
  color: var(--ink); opacity: .07; line-height: 1; user-select: none;
}
.step-icon { color: var(--accent); }
.step-card h3 { font-family: var(--display); font-size: 1.1rem; font-weight: 600; }
.step-card p { color: var(--ink-soft); font-size: .92rem; }

/* Steps 1-2-3: one accent each, echoing the ideas-grid palette */
.step-card:nth-child(1) .step-icon, .step-card:nth-child(1) .step-ghost-num { color: var(--accent); }
.step-card:nth-child(1)::before, .step-card:nth-child(1)::after { border-color: var(--accent); }
.step-card:nth-child(2) .step-icon, .step-card:nth-child(2) .step-ghost-num { color: var(--accent-3); }
.step-card:nth-child(2)::before, .step-card:nth-child(2)::after { border-color: var(--accent-3); }
.step-card:nth-child(3) .step-icon, .step-card:nth-child(3) .step-ghost-num { color: var(--accent-2); }
.step-card:nth-child(3)::before, .step-card:nth-child(3)::after { border-color: var(--accent-2); }

.seo-copy { max-width: 760px; margin-inline: auto; display: flex; flex-direction: column; gap: 1rem; }
.seo-copy p { color: var(--ink-soft); }

.ideas-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 620px) { .ideas-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .ideas-grid { grid-template-columns: repeat(3, 1fr); } }
.idea-card {
  background: var(--bg-elev); border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: 1.2rem; display: flex; flex-direction: column; gap: .5rem;
}
.idea-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.7rem; height: 2.7rem; border-radius: 50%; font-size: 1.3rem;
  background: var(--accent-soft);
}
.idea-card h3 { font-family: var(--display); font-size: 1.02rem; font-weight: 600; }
.idea-card p { font-size: .88rem; color: var(--ink-soft); }

/* Ideas grid: cycle a 4-color palette per card for a lively, categorical feel */
.idea-card:nth-child(4n+1) .idea-icon { background: var(--accent-soft); }
.idea-card:nth-child(4n+1)::before, .idea-card:nth-child(4n+1)::after { border-color: var(--accent); }
.idea-card:nth-child(4n+2) .idea-icon { background: var(--accent-2-soft); }
.idea-card:nth-child(4n+2)::before, .idea-card:nth-child(4n+2)::after { border-color: var(--accent-2); }
.idea-card:nth-child(4n+3) .idea-icon { background: var(--accent-3-soft); }
.idea-card:nth-child(4n+3)::before, .idea-card:nth-child(4n+3)::after { border-color: var(--accent-3); }
.idea-card:nth-child(4n+4) .idea-icon { background: var(--accent-4-soft); }
.idea-card:nth-child(4n+4)::before, .idea-card:nth-child(4n+4)::after { border-color: var(--accent-4); }

.faq-list { max-width: 760px; margin-inline: auto; display: flex; flex-direction: column; gap: .6rem; }
.faq-item { background: var(--bg-elev); border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: .2rem .3rem; }
.faq-item summary {
  cursor: pointer; padding: .9rem 1rem; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "[+]"; font-family: var(--mono); font-size: .95rem; color: var(--accent); flex-shrink: 0; }
.faq-item[open] summary::after { content: "[−]"; }
.faq-item p { padding: 0 1rem 1rem; color: var(--ink-soft); font-size: .92rem; }

.more-tools { text-align: center; }
.more-tools-copy { max-width: 620px; margin: 0 auto; color: var(--ink-soft); }

/* =============================================================
   10. Footer
   ============================================================= */
.site-footer { border-top: 1px solid var(--line); padding: 1.6rem 1.25rem; }
.footer-inner { display: flex; flex-direction: column; gap: .6rem; align-items: center; text-align: center; color: var(--ink-soft); font-size: .85rem; }
.footer-nav { display: flex; gap: 1rem; }
.footer-nav a:hover { color: var(--accent); }
@media (min-width: 620px) { .footer-inner { flex-direction: row; justify-content: space-between; } }

/* =============================================================
   11. Download interstitial dialog
   ============================================================= */
.download-dialog {
  border: none; border-radius: var(--radius); padding: 1.4rem; max-width: 360px; width: calc(100% - 2rem);
  box-shadow: var(--shadow-md); background: var(--bg-elev); color: var(--ink);
}
.download-dialog::backdrop { background: rgba(10,10,12,.55); }
.dialog-close {
  position: absolute; top: .7rem; right: .7rem; width: 2rem; height: 2rem; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; background: var(--bg); color: var(--ink-soft);
}
.dialog-thanks { text-align: center; font-weight: 600; margin-bottom: 1rem; }
.download-dialog .btn { width: 100%; }

/* =============================================================
   12. Corner ad
   ============================================================= */
.corner-ad {
  position: fixed; bottom: 1rem; right: 1rem; z-index: 50; width: 240px;
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md); padding: .5rem;
  opacity: 0; transform: translateY(12px); pointer-events: none;
  transition: opacity .4s var(--ease-out), transform .4s var(--ease-out);
}
/* Visibility toggles via opacity/transform, never [hidden]/display:none —
   the ad slot inside needs real, non-zero layout dimensions from the start
   so AdSense can size it before the toast is ever shown to the user. */
.corner-ad.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.corner-ad .ad-slot--corner { margin: 0; }
.corner-ad-close {
  position: absolute; top: -.5rem; right: -.5rem; width: 1.6rem; height: 1.6rem; border-radius: 50%;
  background: var(--ink); color: var(--bg); font-size: .7rem; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-sm);
}
@media (max-width: 480px) { .corner-ad { left: 1rem; right: 1rem; width: auto; } }

/* =============================================================
   13. Reduced motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .corner-ad { transition: opacity .15s linear; }
}

/* =============================================================
   14. No-JS fallback message
   ============================================================= */
.noscript-note {
  margin: 1rem 1.25rem; padding: 1rem; border: 1px dashed var(--line); border-radius: var(--radius-sm);
  color: var(--ink-soft); text-align: center;
}