/* =============================================================
   QR3D Studio — styles.css
   ============================================================= */

/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg:          #0d0d12;
  --bg-card:     #16161f;
  --bg-card-2:   #1e1e2a;
  --border:      rgba(255,255,255,.08);
  --border-glow: rgba(108,71,255,.35);
  --accent:      #6c47ff;
  --accent-2:    #a07cff;
  --accent-glow: rgba(108,71,255,.18);
  --success:     #22c55e;
  --warning:     #f59e0b;
  --danger:      #ef4444;
  --text:        #e8e8f0;
  --text-muted:  #7878a0;
  --text-dim:    #4a4a6a;
  --sans:        'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --display:     'Plus Jakarta Sans', 'Space Grotesk', system-ui, sans-serif;
  --radius:      16px;
  --radius-sm:   10px;
  --radius-xs:   6px;
  --shadow-sm:   0 2px 12px rgba(0,0,0,.25);
  --shadow-md:   0 8px 32px rgba(0,0,0,.4);
  --shadow-lg:   0 24px 64px rgba(0,0,0,.5);
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft:   cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Light Theme */
[data-theme="light"] {
  --bg:          #f6f8fc;
  --bg-card:     #ffffff;
  --bg-card-2:   #f0f3f9;
  --border:      rgba(0,0,0,.08);
  --border-glow: rgba(108,71,255,.45);
  --accent:      #5b36f5;
  --accent-2:    #7c52f6;
  --accent-glow: rgba(91,54,245,.12);
  --text:        #0f172a;
  --text-muted:  #475569;
  --text-dim:    #94a3b8;
  --shadow-sm:   0 2px 10px rgba(0,0,0,.05);
  --shadow-md:   0 8px 24px rgba(0,0,0,.08);
  --shadow-lg:   0 20px 48px rgba(0,0,0,.1);
}

[data-theme="light"] .site-header {
  background: rgba(255,255,255,.88);
  border-bottom: 1px solid var(--border);
}
[data-theme="light"] .qr-preview-wrap {
  background: radial-gradient(circle at center, #ffffff 0%, #edf1f8 100%);
}
[data-theme="light"] .qr-placeholder {
  background: radial-gradient(circle at center, #ffffff 0%, #edf1f8 100%);
}
[data-theme="light"] .preview-3d-wrap {
  background: radial-gradient(circle at 50% 30%, #ffffff 0%, #e2e8f0 100%);
  border-color: rgba(0,0,0,.1);
  box-shadow: inset 0 2px 8px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.06);
}
[data-theme="light"] .preview-3d-badge {
  background: rgba(255,255,255,.9);
  color: var(--accent);
  border-color: rgba(0,0,0,.1);
  box-shadow: 0 2px 6px rgba(0,0,0,.05);
}
[data-theme="light"] .preview-tool-btn {
  background: rgba(255,255,255,.9);
  color: var(--text-muted);
  border-color: rgba(0,0,0,.1);
  box-shadow: 0 2px 4px rgba(0,0,0,.04);
}
[data-theme="light"] .preview-tool-btn:hover {
  background: var(--accent-glow);
  color: var(--accent);
  border-color: var(--accent);
}
[data-theme="light"] .preview-tool-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
[data-theme="light"] .preview-3d-hint {
  background: rgba(255,255,255,.85);
  color: var(--text-muted);
  border: 1px solid rgba(0,0,0,.08);
  box-shadow: 0 2px 8px rgba(0,0,0,.04);
}
[data-theme="light"] .hero-free-badge {
  background: rgba(22,163,74,.1);
  border-color: rgba(22,163,74,.25);
  color: #15803d;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; 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;
}
[hidden] { display: none !important; }
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; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { font-family: var(--display); text-wrap: balance; line-height: 1.1; letter-spacing: -0.02em; }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
details summary { cursor: pointer; list-style: none; }
details summary::-webkit-details-marker { display: none; }

/* =============================================================
   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;
}
.skip-link {
  position: fixed; top: -100px; left: 1rem; z-index: 9999;
  padding: .6rem 1.2rem; background: var(--accent); color: #fff;
  border-radius: var(--radius-xs); font-weight: 600;
  transition: top .2s var(--ease-out);
}
.skip-link:focus { top: 1rem; }
.container {
  width: min(100%, 1200px);
  padding-inline: clamp(1rem, 4vw, 2rem);
  margin-inline: auto;
}
.label-opt { font-size: .8rem; color: var(--text-muted); font-weight: 400; }

/* =============================================================
   4. Typography
   ============================================================= */
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); margin-bottom: 2rem; }
h3 { font-size: 1.1rem; margin-bottom: .5rem; }

/* =============================================================
   5. Components
   ============================================================= */

/* Lucide icons: align inline */
[data-lucide], i[data-lucide] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  vertical-align: middle;
}
[data-lucide] svg { display: block; }

/* Input with icon */
.input-with-icon { position: relative; }
.input-icon {
  position: absolute; left: .85rem; top: 50%; transform: translateY(-50%);
  color: var(--text-dim); pointer-events: none;
}
.text-input.has-icon { padding-left: 2.6rem; }

/* Style preview SVG inside style-btn */
.style-btn .style-preview {
  width: 40px; height: 40px;
  display: block; margin-bottom: .25rem;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.25));
}
.style-btn.active .style-preview { filter: drop-shadow(0 0 4px rgba(108,71,255,.5)); }

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.5rem; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .95rem;
  transition: all .25s var(--ease-out);
  cursor: pointer; text-align: center;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,.15);
}
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 6px 28px rgba(108,71,255,.45), inset 0 1px 0 rgba(255,255,255,.2);
  transform: translateY(-1px);
}
.btn-primary:disabled { opacity: .45; cursor: not-allowed; transform: none; }
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text-muted);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent-2); background: var(--accent-glow); }
.btn-ghost { background: transparent; color: var(--text-muted); font-size: .875rem; }
.btn-ghost:hover { color: var(--text); }

.btn-3mf {
  width: 100%; justify-content: center; flex-direction: column; gap: .15rem;
  padding: 1rem 1.5rem;
}
.btn-3mf small { font-size: .75rem; font-weight: 400; opacity: .75; }
.btn-stl { width: 100%; justify-content: center; font-size: .85rem; }

/* Inputs */
.text-input {
  width: 100%; padding: .75rem 1rem;
  background: var(--bg); border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text);
  font-size: .95rem; font-family: var(--sans);
  transition: border-color .2s var(--ease-out), box-shadow .2s var(--ease-out);
  resize: vertical;
}
.text-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.text-input::placeholder { color: var(--text-dim); }
.big-input { font-size: 1rem; padding: .9rem 1rem; }

.select-input {
  width: 100%; padding: .75rem 1rem;
  background: var(--bg); border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text);
  font-family: var(--sans); font-size: .9rem;
  cursor: pointer;
}
.select-input:focus { outline: none; border-color: var(--accent); }

/* Control groups */
.control-group { margin-bottom: 1.25rem; }
.control-label { display: block; font-size: .85rem; font-weight: 600; color: var(--text-muted); margin-bottom: .6rem; letter-spacing: .03em; text-transform: uppercase; }

/* Mode tabs (link/whatsapp/vcard/wifi/text) — Segmented Control */
.mode-tabs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: .3rem;
  background: var(--bg);
  border: 1.5px solid var(--border);
  padding: .3rem;
  border-radius: var(--radius-sm);
  margin-bottom: .85rem;
}
.mode-tab {
  padding: .55rem .3rem;
  border-radius: var(--radius-xs);
  font-size: .78rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .35rem;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  transition: all .2s var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
}
.mode-tab:hover:not(.active) {
  color: var(--text);
  background: rgba(255,255,255,.04);
}
.mode-tab.active {
  background: var(--bg-card-2);
  border-color: var(--border-glow);
  color: var(--accent-2);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0,0,0,.4);
}

.mode-panel { display: none; }
.mode-panel.active { display: block; }

/* Style grid (QR styles) */
.style-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .5rem; }
.style-btn {
  display: flex; flex-direction: column; align-items: center; gap: .35rem;
  padding: .6rem .4rem; border-radius: var(--radius-sm);
  background: var(--bg); border: 1.5px solid var(--border); color: var(--text-muted);
  font-size: .75rem; font-weight: 500;
  transition: all .2s var(--ease-out);
}
.style-btn svg { fill: currentColor; }
.style-btn.active { border-color: var(--accent); color: var(--accent-2); background: var(--accent-glow); }
.style-btn:hover:not(.active) { border-color: var(--border-glow); color: var(--text); }

/* Frame grid (CTA frames) */
.frame-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .45rem; }
.frame-btn {
  padding: .55rem .5rem; border-radius: var(--radius-xs);
  background: var(--bg); border: 1.5px solid var(--border); color: var(--text-muted);
  font-size: .75rem; font-weight: 600; text-align: center;
  display: inline-flex; align-items: center; justify-content: center; gap: .35rem;
  transition: all .2s var(--ease-out);
}
.frame-btn:hover:not(.active) { border-color: var(--border-glow); color: var(--text); background: rgba(255,255,255,.03); }
.frame-btn.active { border-color: var(--accent); color: var(--accent-2); background: var(--accent-glow); }

/* Center Icon Grid */
.center-options { display: flex; flex-direction: column; gap: .75rem; }
.icon-grid { display: flex; flex-wrap: wrap; gap: .45rem; }
.icon-btn {
  width: 38px; height: 38px; border-radius: var(--radius-xs);
  background: var(--bg); border: 1.5px solid var(--border);
  color: var(--text-muted);
  display: inline-flex; align-items: center; justify-content: center;
  transition: all .2s var(--ease-out);
  cursor: pointer;
}
.icon-btn:hover {
  border-color: var(--accent); color: var(--accent-2);
  background: var(--accent-glow);
  transform: translateY(-2px);
}
.icon-btn.active {
  border-color: var(--accent); color: var(--accent-2);
  background: var(--accent-glow);
  box-shadow: 0 0 14px var(--accent-glow);
}

.logo-upload-wrap { display: flex; align-items: center; gap: .75rem; }
.logo-upload-btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .45rem .9rem; border-radius: var(--radius-xs);
  background: var(--bg); border: 1.5px solid var(--border); color: var(--text-muted);
  font-size: .83rem; font-weight: 500; cursor: pointer;
  transition: all .2s var(--ease-out);
}
.logo-upload-btn:hover { border-color: var(--accent); color: var(--accent-2); }
.remove-logo-btn { font-size: .8rem; color: var(--danger); }
.remove-logo-btn:hover { text-decoration: underline; }

/* Format tabs (soporte / llavero / placa / iman / posavasos) */
.format-tabs { display: grid; grid-template-columns: repeat(auto-fit, minmax(68px, 1fr)); gap: .4rem; }
.format-tab {
  display: flex; flex-direction: column; align-items: center; gap: .2rem;
  padding: .5rem .3rem; border-radius: var(--radius-sm);
  background: var(--bg); border: 1.5px solid var(--border); color: var(--text-muted);
  font-size: .75rem; font-weight: 500; text-align: center;
  transition: all .2s var(--ease-out);
}
.format-tab .format-icon {
  font-size: 1.3rem;
  display: flex; align-items: center; justify-content: center;
  color: inherit;
}
.format-tab.active { border-color: var(--accent); color: var(--accent-2); background: var(--accent-glow); }
.format-tab:hover:not(.active) { border-color: var(--border-glow); color: var(--text); }


/* Contrast bar */
.contrast-bar {
  margin-top: .75rem; height: 6px; border-radius: 3px;
  background: var(--bg); overflow: hidden; position: relative;
}
.contrast-indicator {
  position: absolute; inset: 0;
  background: var(--danger); border-radius: 3px;
  transition: width .4s var(--ease-soft), background .4s;
}
.contrast-label { display: block; font-size: .75rem; margin-top: .35rem; color: var(--text-muted); }

/* Input group wrapper */
.input-group { margin-bottom: 1.25rem; }

/* =============================================================
   6. Sections
   ============================================================= */

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(13,13,18,.85); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: .85rem;
}
.logo { display: flex; align-items: center; gap: .55rem; font-size: 1.15rem; font-family: var(--display); font-weight: 700; text-decoration: none; }
.logo-icon {
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--accent-2);
  background: none;
  border: none;
  padding: 0;
}
.logo-text strong { color: var(--accent-2); }
.logo-badge-3d {
  display: inline-block;
  font-size: .65rem;
  font-weight: 800;
  padding: .1rem .4rem;
  border-radius: 4px;
  background: var(--accent-glow);
  border: 1px solid var(--border-glow);
  color: var(--accent-2);
  margin-left: .35rem;
  letter-spacing: .05em;
  vertical-align: middle;
}
.header-nav { display: flex; align-items: center; gap: 1.25rem; }
.header-nav a { font-size: .88rem; color: var(--text-muted); transition: color .2s; }
.header-nav a:hover { color: var(--text); }

/* Language Switcher */
.lang-switcher { position: relative; }
.lang-btn {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .35rem .65rem; border-radius: var(--radius-xs);
  background: var(--bg-card-2); border: 1px solid var(--border);
  font-size: .8rem; font-weight: 600; color: var(--text-muted);
  transition: all .2s var(--ease-out);
}
.lang-btn:hover { border-color: var(--accent); color: var(--text); }
.lang-dropdown {
  position: absolute; top: calc(100% + 6px); right: 0;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-xs); box-shadow: var(--shadow-md);
  min-width: 150px; padding: .35rem;
  display: none; flex-direction: column; gap: .2rem;
  z-index: 150;
}
.lang-switcher:hover .lang-dropdown,
.lang-switcher:focus-within .lang-dropdown { display: flex; }
.lang-option {
  display: flex; align-items: center; gap: .4rem;
  padding: .4rem .6rem; border-radius: 4px;
  font-size: .78rem; font-weight: 500; color: var(--text-muted);
  transition: all .15s;
}
.lang-option:hover { background: var(--accent-glow); color: var(--accent-2); }
.lang-option.active { color: var(--accent-2); font-weight: 600; background: rgba(108,71,255,.1); }

/* Theme Toggle */
.theme-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: var(--radius-xs);
  background: var(--bg-card-2); border: 1px solid var(--border);
  color: var(--text-muted); cursor: pointer;
  transition: all .2s var(--ease-out);
}
.theme-btn:hover { border-color: var(--accent); color: var(--text); }
[data-theme="light"] .theme-icon-sun { display: none; }
[data-theme="light"] .theme-icon-moon { display: block; }
:root:not([data-theme="light"]) .theme-icon-sun { display: block; }
:root:not([data-theme="light"]) .theme-icon-moon { display: none; }

/* Hero */
.hero { padding: clamp(2.5rem, 5vw, 4rem) 0 2rem; }
.hero-text { text-align: center; margin-bottom: 2rem; }
.hero-free-badge {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .35rem .9rem; border-radius: 20px;
  background: rgba(34,197,94,.1); border: 1px solid rgba(34,197,94,.25);
  color: #4ade80; font-size: .8rem; font-weight: 600;
  letter-spacing: .02em; margin-bottom: 1rem;
  box-shadow: 0 2px 12px rgba(34,197,94,.12);
}
.hero-text h1 { margin-bottom: .75rem; }
.hero-text h1 strong, .hero-text h1 em { color: var(--accent-2); font-style: normal; }
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.15rem); color: var(--text-muted);
  max-width: 65ch; margin-inline: auto; line-height: 1.65;
}

/* Tool card */
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  overflow: hidden;
}
.tool-left {
  padding: clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--border);
}
.tool-right { padding: clamp(1.25rem, 3vw, 2rem); }

/* QR preview */
.preview-section { margin-bottom: 1.5rem; }
.preview-title { font-size: .85rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); margin-bottom: .75rem; }
.qr-preview-wrap {
  position: relative;
  width: 220px; height: 220px; margin-inline: auto;
  background: radial-gradient(circle at center, #1b1b26 0%, #101017 100%);
  border: 1.5px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  transition: all .3s var(--ease-out);
  box-shadow: inset 0 2px 8px rgba(0,0,0,.4), 0 4px 20px rgba(0,0,0,.2);
}
.qr-preview-wrap:hover {
  border-color: var(--border-glow);
  box-shadow: inset 0 2px 8px rgba(0,0,0,.4), 0 0 24px rgba(108,71,255,.2);
}
#qr-canvas-container { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
#qr-canvas-container canvas { display: block; margin: auto; max-width: 190px; max-height: 190px; border-radius: var(--radius-xs); box-shadow: 0 4px 14px rgba(0,0,0,.4); }
.qr-placeholder {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .5rem;
  color: var(--text-dim); font-size: .8rem; text-align: center;
  background: radial-gradient(circle at center, #1b1b26 0%, #101017 100%);
}
.qr-placeholder svg { opacity: .4; }

/* Warnings */
.warnings-wrap { margin-top: .6rem; display: flex; flex-direction: column; gap: .4rem; }
.warning-item {
  display: flex; align-items: flex-start; gap: .4rem;
  font-size: .78rem; padding: .4rem .6rem; border-radius: var(--radius-xs);
  line-height: 1.4;
}
.warning-item.warn { background: rgba(245,158,11,.1); color: #f59e0b; border: 1px solid rgba(245,158,11,.2); }
.warning-item.error { background: rgba(239,68,68,.1); color: #ef4444; border: 1px solid rgba(239,68,68,.2); }
.warning-item.ok { background: rgba(34,197,94,.08); color: #22c55e; border: 1px solid rgba(34,197,94,.18); }

/* Downloads 2D */
.downloads-2d { display: flex; gap: .5rem; margin-top: .75rem; justify-content: center; }
.downloads-2d .btn { font-size: .82rem; padding: .5rem .9rem; }

/* Divider */
.section-divider {
  display: flex; align-items: center; gap: 1rem;
  margin: 1.5rem 0;
  color: var(--text-dim); font-size: .78rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em;
}
.section-divider::before, .section-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* 3D preview canvas */
.preview-3d-wrap {
  position: relative; width: 100%;
  height: 350px; border-radius: var(--radius);
  background: radial-gradient(circle at 50% 30%, #151522 0%, #09090e 100%);
  border: 1.5px solid var(--border);
  overflow: hidden; margin-bottom: 1.25rem;
  box-shadow: inset 0 2px 10px rgba(0,0,0,.5), 0 8px 30px rgba(0,0,0,.3);
  transition: border-color .3s;
}
.preview-3d-wrap:hover { border-color: var(--border-glow); }

.preview-3d-topbar {
  position: absolute; top: .6rem; left: .6rem; right: .6rem;
  display: flex; justify-content: space-between; align-items: center;
  z-index: 10; pointer-events: none;
}
.preview-3d-badge {
  display: inline-flex; align-items: center; gap: .35rem;
  background: rgba(13,13,20,.75); backdrop-filter: blur(8px);
  border: 1px solid var(--border); border-radius: 20px;
  padding: .3rem .65rem; font-size: .72rem; color: var(--accent-2);
  font-weight: 600; letter-spacing: .02em;
}
.preview-3d-tools {
  display: flex; gap: .3rem; pointer-events: auto;
}
.preview-tool-btn {
  display: inline-flex; align-items: center; gap: .3rem;
  background: rgba(13,13,20,.75); backdrop-filter: blur(8px);
  border: 1px solid var(--border); border-radius: var(--radius-xs);
  padding: .3rem .55rem; font-size: .72rem; color: var(--text-muted);
  cursor: pointer; transition: all .2s var(--ease-out);
}
.preview-tool-btn:hover {
  background: rgba(108,71,255,.2); border-color: var(--accent); color: #fff;
}
.preview-tool-btn.active {
  background: var(--accent); color: #fff; border-color: var(--accent);
}

.preview-3d-hint {
  position: absolute; bottom: .6rem; left: 50%; transform: translateX(-50%);
  display: inline-flex; align-items: center; gap: .35rem;
  background: rgba(13,13,20,.65); backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.08); border-radius: 20px;
  padding: .25rem .7rem; font-size: .68rem; color: var(--text-dim);
  pointer-events: none; opacity: .85; transition: opacity .3s;
  white-space: nowrap;
}
.preview-3d-wrap:hover .preview-3d-hint { opacity: 0.25; }

#canvas-3d { width: 100%; height: 100%; cursor: grab; }
#canvas-3d:active { cursor: grabbing; }
.preview-3d-status {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .75rem;
  color: var(--text-muted); font-size: .85rem;
  background: var(--bg); transition: opacity .4s; z-index: 20;
}
.preview-3d-status.hidden { opacity: 0; pointer-events: none; }
.preview-3d-fallback {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem; text-align: center;
  font-size: .85rem; color: var(--text-muted);
  background: var(--bg); z-index: 20;
}
.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Backup actions & email modal */
.backup-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem;
  margin-top: .6rem;
}
.btn-backup {
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: .8rem;
  font-weight: 500;
  padding: .6rem .75rem;
  border-radius: var(--radius-xs);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  transition: all .2s var(--ease-out);
}
.btn-backup:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent-2);
  background: var(--accent-glow);
}
.btn-backup:disabled { opacity: .4; cursor: not-allowed; }

/* Saved Vault Section */
.vault-section {
  margin-top: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.vault-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.vault-title {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: 1.05rem;
  font-family: var(--display);
  font-weight: 700;
}
.vault-count {
  font-size: .75rem;
  background: var(--accent-glow);
  color: var(--accent-2);
  padding: .15rem .5rem;
  border-radius: 12px;
  border: 1px solid var(--border-glow);
}
.vault-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}
.vault-card {
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .9rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  transition: border-color .2s;
}
.vault-card:hover { border-color: var(--border-glow); }
.vault-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: .5rem;
}
.vault-card-title {
  font-size: .88rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.vault-card-date { font-size: .72rem; color: var(--text-dim); }
.vault-card-meta {
  font-size: .75rem;
  color: var(--text-muted);
  background: var(--bg);
  padding: .3rem .5rem;
  border-radius: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.vault-card-actions {
  display: flex;
  gap: .4rem;
  margin-top: .2rem;
}
.vault-btn-load {
  flex: 1;
  background: var(--accent-glow);
  border: 1px solid var(--border-glow);
  color: var(--accent-2);
  font-size: .78rem;
  font-weight: 600;
  padding: .35rem .6rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background .2s;
}
.vault-btn-load:hover { background: var(--accent); color: #fff; }
.vault-btn-del {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: .75rem;
  padding: .35rem .5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: color .2s, border-color .2s;
}
.vault-btn-del:hover { color: var(--danger); border-color: var(--danger); }
.vault-empty {
  text-align: center;
  color: var(--text-dim);
  font-size: .85rem;
  padding: 1.5rem;
}

/* Privacy badge */
.privacy-badge {
  text-align: center;
  font-size: .85rem; color: var(--text-muted);
  padding: 1rem; margin-top: 1rem;
}
.privacy-badge strong { color: var(--text); }

/* ─── Ad slots (Clean auto-collapsing) ─────────────── */
.ad-slot {
  display: none;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  align-items: center; justify-content: center;
  margin: 1.5rem auto;
  overflow: hidden;
  text-align: center;
}
.ad-slot:has(ins.adsbygoogle),
.ad-slot:has(iframe),
.ad-slot:has(div),
.ad-slot.ad-active {
  display: flex;
}
.ad-leaderboard {
  max-width: 728px;
}
.ad-incontent {
  max-width: 336px;
}

/* Ad popup */
.ad-popup {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0;
  max-width: 340px; width: 90vw;
  box-shadow: var(--shadow-lg);
}
.ad-popup::backdrop { background: rgba(0,0,0,.65); backdrop-filter: blur(4px); }
.ad-popup-inner { padding: 1.25rem; display: flex; flex-direction: column; gap: 1rem; align-items: center; }
.ad-popup-close {
  position: absolute; top: .75rem; right: .75rem;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--bg); color: var(--text-muted); font-size: .85rem;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s, color .2s;
}
.ad-popup-close:hover { background: var(--danger); color: #fff; }
.ad-popup-slot { width: 100%; min-height: 250px; padding: 1rem; }
.ad-popup-dismiss { font-size: .82rem; }

/* ─── Swatch color picker ─────────────────────────── */
.color-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.color-field-new { display: flex; flex-direction: column; gap: .4rem; }
.color-field-label {
  display: flex; align-items: center; gap: .3rem;
  font-size: .78rem; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em;
}

.swatch-row {
  display: flex; flex-wrap: wrap; gap: 5px;
}
.swatch {
  width: 26px; height: 26px;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .15s var(--ease-out), border-color .15s, box-shadow .15s;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.12);
}
.swatch:hover { transform: scale(1.18); box-shadow: 0 2px 8px rgba(0,0,0,.3), inset 0 0 0 1px rgba(255,255,255,.15); }
.swatch.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow), inset 0 0 0 1px rgba(255,255,255,.15);
  transform: scale(1.1);
}

.swatch-custom {
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-card-2);
  border: 1.5px dashed var(--border);
  color: var(--text-dim); cursor: pointer;
  position: relative; overflow: hidden;
}
.swatch-custom:hover { border-color: var(--accent); color: var(--accent-2); }
.swatch-native {
  position: absolute; opacity: 0;
  width: 100%; height: 100%;
  cursor: pointer; top: 0; left: 0;
}

.color-active-preview {
  display: flex; align-items: center; gap: .5rem;
  margin-top: .15rem;
}
.color-active-dot {
  width: 16px; height: 16px; border-radius: 4px; flex-shrink: 0;
  border: 1.5px solid rgba(255,255,255,.15);
  transition: background .2s;
}
.color-active-hex {
  font-size: .75rem; color: var(--text-muted); font-family: monospace;
}

/* Scanner Modal */
.scanner-modal {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0;
  max-width: 400px; width: 92vw;
  box-shadow: var(--shadow-lg); color: var(--text);
}
.scanner-modal::backdrop { background: rgba(0,0,0,.7); backdrop-filter: blur(4px); }
.scanner-modal-inner { padding: 1.5rem; display: flex; flex-direction: column; gap: 1rem; }
.scanner-header { display: flex; justify-content: space-between; align-items: center; }
.scanner-desc { font-size: .85rem; color: var(--text-muted); line-height: 1.5; }
.scanner-test-card {
  background: var(--bg-card-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 1rem;
}
.scanner-result {
  background: var(--bg); border: 1px solid var(--border-glow);
  border-radius: var(--radius-sm); padding: .85rem;
}
.scanner-result-header { font-size: .85rem; font-weight: 600; margin-bottom: .35rem; }
.scanner-result-content {
  font-size: .82rem; color: var(--accent-2); word-break: break-all;
  font-family: monospace; background: rgba(108,71,255,.1); padding: .4rem .6rem; border-radius: 4px;
}

/* Ad toast */

.ad-toast {
  position: fixed; bottom: 1.25rem; right: 1.25rem; z-index: 200;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-md);
  padding: .75rem; width: 160px;
  animation: slideInRight .4s var(--ease-out);
}
.ad-toast[hidden] { display: none; }
.ad-toast-close {
  position: absolute; top: .35rem; right: .35rem;
  font-size: .7rem; color: var(--text-dim); width: 20px; height: 20px;
  display: flex; align-items: center; justify-content: center;
}
.ad-toast-slot { min-height: 80px; padding: .5rem; width: 100%; }
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* Section: how it works */
.section-how { padding: clamp(3rem, 6vw, 5rem) 0; }
.steps-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem;
}
.step-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.75rem;
  position: relative; transition: border-color .3s, transform .3s var(--ease-out);
}
.step-card:hover { border-color: var(--border-glow); transform: translateY(-3px); }
.step-num {
  position: absolute; top: 1.25rem; right: 1.25rem;
  font-family: var(--display); font-size: 3rem; font-weight: 900;
  color: var(--border); line-height: 1;
}
.step-icon { font-size: 2rem; margin-bottom: .75rem; }
.step-card h3 { color: var(--text); margin-bottom: .5rem; }
/* ─── Share Bar ──────────────────────────────────── */
.share-bar-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .85rem;
  margin: 2rem auto 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 720px;
  box-shadow: var(--shadow-sm);
  text-align: center;
}
.share-label {
  font-size: .88rem;
  font-weight: 600;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}
.share-label i { color: var(--accent-2); }
.share-buttons {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: .6rem;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .5rem .95rem;
  border-radius: var(--radius-xs);
  font-size: .82rem;
  font-weight: 600;
  font-family: var(--sans);
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-card-2);
  color: var(--text);
  transition: all .2s var(--ease-out);
  text-decoration: none;
}
.share-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,.15);
}
.share-btn.share-wa {
  background: rgba(37,211,102,.12);
  color: #25d366;
  border-color: rgba(37,211,102,.3);
}
.share-btn.share-wa:hover {
  background: #25d366;
  color: #fff;
  border-color: #25d366;
}
.share-btn.share-x {
  background: rgba(255,255,255,.06);
  color: var(--text);
  border-color: var(--border);
}
.share-btn.share-x:hover {
  background: #000;
  color: #fff;
  border-color: #333;
}
[data-theme="light"] .share-btn.share-x:hover {
  background: #111;
  color: #fff;
}
.share-btn.share-tg {
  background: rgba(34,158,217,.12);
  color: #229ed9;
  border-color: rgba(34,158,217,.3);
}
.share-btn.share-tg:hover {
  background: #229ed9;
  color: #fff;
  border-color: #229ed9;
}
.share-btn.share-copy {
  background: var(--accent-glow);
  color: var(--accent-2);
  border-color: var(--border-glow);
}
.share-btn.share-copy:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.share-btn.share-native {
  background: var(--bg-card-2);
  color: var(--text);
}
.share-btn.share-native:hover {
  border-color: var(--accent);
  color: var(--accent-2);
}

/* Section: ideas */
.section-ideas { padding: clamp(2rem, 4vw, 4rem) 0; }
.ideas-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.25rem;
}
.idea-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem;
  display: flex; flex-direction: column; gap: .5rem;
  transition: border-color .3s, transform .3s var(--ease-out);
}
.idea-card:hover { border-color: var(--border-glow); transform: translateY(-2px); }
.idea-emoji {
  font-size: 2rem;
  display: flex; align-items: center; justify-content: center;
  width: 52px; height: 52px;
  background: var(--accent-glow);
  border-radius: 12px;
  border: 1px solid var(--border-glow);
  padding: 10px;
  color: var(--accent-2);
}
.idea-card h3 { font-size: 1rem; }
.idea-card p { font-size: .875rem; color: var(--text-muted); line-height: 1.55; }

/* Section: FAQ */
.section-faq { padding: clamp(2rem, 4vw, 4rem) 0 clamp(3rem, 6vw, 5rem); }
.faq-list { display: flex; flex-direction: column; gap: .75rem; max-width: 760px; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); overflow: hidden;
  transition: border-color .2s;
}
.faq-item[open] { border-color: var(--border-glow); }
.faq-item summary {
  padding: 1.1rem 1.25rem; font-weight: 600; font-size: .95rem;
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; transition: background .2s;
}
.faq-item summary::after {
  content: '+'; font-size: 1.2rem; color: var(--accent-2);
  flex-shrink: 0; transition: transform .25s var(--ease-out);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary:hover { background: var(--bg-card-2); }
.faq-item p {
  padding: 0 1.25rem 1.1rem; font-size: .9rem; color: var(--text-muted); line-height: 1.65;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 3.5rem 0 2rem;
  background: var(--bg-card);
  color: var(--text-muted);
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}
.footer-col-brand { display: flex; flex-direction: column; gap: .75rem; }
.footer-bio { font-size: .85rem; line-height: 1.6; color: var(--text-dim); max-width: 32ch; }
.footer-col-title {
  font-size: .82rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text); margin-bottom: .85rem;
}
.footer-col-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: .5rem; }
.footer-col-list li, .footer-col-list a, .footer-col-list span {
  font-size: .83rem; color: var(--text-muted); transition: color .2s;
}
.footer-col-list a:hover { color: var(--accent-2); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem; font-size: .78rem; color: var(--text-dim);
}
.footer-credits a { color: var(--text-muted); text-decoration: underline; text-underline-offset: 2px; }
.footer-credits a:hover { color: var(--text); }

/* Panel 3D */
.panel-3d { }
.downloads-3d { display: flex; flex-direction: column; gap: .6rem; }

/* =============================================================
   7. Effects & animations
   ============================================================= */
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.animate-in { animation: fadeIn .5s var(--ease-out) both; }

/* =============================================================
   8. Responsive
   ============================================================= */
@media (min-width: 720px) {
  .tool-card {
    grid-template-columns: 1fr 1fr;
  }
  .tool-left {
    border-bottom: none;
    border-right: 1px solid var(--border);
  }
  .qr-preview-wrap { width: 220px; height: 220px; }
}

@media (min-width: 960px) {
  .tool-card { grid-template-columns: 420px 1fr; }
  .qr-preview-wrap { width: 240px; height: 240px; }
}

@media (max-width: 768px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-col-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
}

@media (max-width: 640px) {
  .header-inner { padding-block: .6rem; }
  .header-nav { gap: .45rem; }
  .header-nav > a { display: none; } /* hide text anchor links on small screens */
  .header-nav .share-btn span { display: none; } /* compact share icon on mobile */
  .header-nav .share-btn { padding: .35rem .55rem; }
  .lang-btn { padding: .3rem .5rem; font-size: .78rem; }
  .theme-btn { width: 34px; height: 34px; }
  .logo { font-size: 1.05rem; gap: .4rem; }
  .logo-badge-3d { font-size: .6rem; padding: .08rem .3rem; }
}

@media (max-width: 540px) {
  .mode-tabs { grid-template-columns: repeat(3, 1fr); }
  .style-grid { grid-template-columns: repeat(2, 1fr); }
  .format-tabs { grid-template-columns: repeat(2, 1fr); }
}

/* =============================================================
   9. Reduced motion
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .spinner { animation-duration: 2s; }
  .ad-toast { animation: none; }
  .step-card:hover, .idea-card:hover { transform: none; }
}