/* =========================================================
   QRForge — IMAGES (fully self-contained stylesheet)
   Base + Atelier skin + extras (switcher · content · footer),
   merged. Linked ONLY by pages inside /images/. No ../ paths.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700;800&display=swap');

/* ---------- Tokens ---------- */
:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-2: #f4f4f5;
  --text: #09090b;
  --text-muted: #71717a;
  --border: #e4e4e7;
  --accent: #c026d3;
  --accent-hover: #a21caf;
  --accent-deep: #86198f;
  --accent-subtle: #faf5ff;
  --danger: #dc2626;  --danger-bg: #fef2f2;
  --success: #16a34a; --success-bg: #f0fdf4;
  --radius: 10px; --radius-sm: 6px;
  --shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --header-h: 64px;
  --font: 'Sora', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

html.dark {
  --bg: #09090b;
  --surface: #18181b;
  --surface-2: #27272a;
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --border: #27272a;
  --accent: #d946ef;
  --accent-hover: #e879f9;
  --accent-deep: #a21caf;
  --accent-subtle: #4a044e;
  --danger: #ef4444;  --danger-bg: #450a0a;
  --success: #22c55e; --success-bg: #052e16;
  --shadow: 0 1px 2px 0 rgb(0 0 0 / 0.4);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.3);
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  font-family: var(--font);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg);
  background-image:
    radial-gradient(680px 380px at 88% -8%, rgba(139, 92, 246, 0.09), transparent 62%),
    radial-gradient(560px 360px at -6% 28%, rgba(217, 70, 239, 0.07), transparent 58%);
}

::selection { background: rgba(192, 38, 211, 0.2); }

h1, h2, h3, h4 { font-weight: 600; letter-spacing: -0.025em; color: var(--text); }
h1 { font-size: 2.25rem; line-height: 1.2; }
h2 { font-size: 1.5rem; line-height: 1.3; }
h3 { font-size: 1.125rem; line-height: 1.4; }
p { color: var(--text-muted); }

a { color: var(--accent); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--accent-hover); }

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 1.25rem; }
.container-wide { max-width: 1280px; }

/* ---------- Header (glassy, gradient underline) ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-h);
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--surface) 84%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid transparent;
  border-image: linear-gradient(90deg, #8b5cf6, #d946ef, #8b5cf6) 1;
  box-shadow: 0 2px 0 var(--accent);
  transition: border-image 0.3s ease;
}
.site-header:hover { border-image: linear-gradient(90deg, #d946ef, #a78bfa, #d946ef) 1; }

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 1.25rem;
}
.logo { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.125rem; color: var(--text); letter-spacing: -0.03em; }
.logo span { color: var(--accent); }
.logo:hover { color: var(--text); }

.nav { display: flex; align-items: center; gap: 0.25rem; }
.nav a {
  padding: 0.32rem 0.85rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.875rem; font-weight: 500;
  color: var(--text-muted);
  transition: color 0.15s ease, border-color 0.15s ease;
}
.nav a:hover { border-color: var(--accent); color: var(--accent); background: transparent; }
.nav a.active {
  background: linear-gradient(135deg, #8b5cf6, #d946ef);
  color: #fff;
  box-shadow: 0 2.5px 8px rgba(192, 38, 211, 0.32);
}
html.dark .nav a.active { background: linear-gradient(135deg, #a78bfa, #e879f9); }

.header-actions { display: flex; align-items: center; gap: 0.5rem; }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.theme-toggle:hover { background: var(--surface-2); color: var(--text); }
.theme-toggle svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle .icon-sun { display: none; }
html.dark .theme-toggle .icon-moon { display: none; }
html.dark .theme-toggle .icon-sun { display: block; }

/* ---------- Buttons (pill, gradient, shine sweep) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  font-size: 0.875rem; font-weight: 700; font-family: inherit;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer; white-space: nowrap;
  transition: all 0.15s ease;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-block { width: 100%; }

.btn-primary {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #8b5cf6, #d946ef);
  color: #fff;
  box-shadow: 0 3.5px 12px rgba(192, 38, 211, 0.32);
}
.btn-primary::after {
  content: ""; position: absolute; top: 0; left: -80%;
  width: 42%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255,255,255,0.35), transparent);
  transform: skewX(-18deg);
  transition: left 0.5s ease;
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1.5px) scale(1.012);
  filter: brightness(1.05);
  box-shadow: 0 7px 18px rgba(192, 38, 211, 0.4);
}
.btn-primary:hover:not(:disabled)::after { left: 130%; }

.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-secondary:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); background: var(--surface-2); }

html.dark .btn-primary { background: linear-gradient(135deg, #a78bfa, #e879f9); }

/* ---------- Cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid color-mix(in srgb, var(--accent) 12%, var(--border));
  border-radius: 18px;
  box-shadow: 0 3.5px 14px rgba(192, 38, 211, 0.05);
  transition: all 0.16s ease;
}
.card:hover {
  border-color: var(--accent);
  box-shadow: 0 12px 28px rgba(192, 38, 211, 0.12);
  transform: translateY(-1.5px);
}

/* ---------- Forms ---------- */
.form-group { margin-bottom: 1.25rem; }
label { display: block; font-size: 0.8125rem; font-weight: 500; color: var(--text); margin-bottom: 0.35rem; }
.hint { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.3rem; }

input[type="text"], input[type="url"], input[type="number"], input[type="color"], select, textarea {
  width: 100%; padding: 0.55rem 0.75rem;
  font-size: 0.875rem; font-family: inherit; color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3.5px rgba(192, 38, 211, 0.12);
}
input[type="color"] { padding: 0.25rem; height: 40px; cursor: pointer; }
select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}
.input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.color-row { display: flex; align-items: center; gap: 0.75rem; }
.color-row input[type="color"] { width: 48px; flex-shrink: 0; }

/* ---------- Alerts ---------- */
.alert { padding: 0.75rem 1rem; border-radius: 12px; font-size: 0.8125rem; margin-bottom: 1rem; display: none; }
.alert.show { display: block; }
.alert-error { background: var(--danger-bg); color: var(--danger); border: 1px solid var(--danger); }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid var(--success); }

/* ---------- Drop zone / files / status ---------- */
.drop-zone {
  border: 1.5px dashed color-mix(in srgb, var(--accent) 38%, var(--border));
  border-radius: 16px;
  padding: 2rem 1rem;
  text-align: center; cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.drop-zone:hover, .drop-zone:focus { border-color: var(--accent); background: rgba(192, 38, 211, 0.04); }
.drop-zone.busy { pointer-events: none; opacity: 0.7; }
.file-meta { display: none; align-items: center; gap: 0.75rem; border: 1px solid var(--border); border-radius: 10px; padding: 0.75rem 0.9rem; margin-top: 0.75rem; }
.file-meta.show { display: flex; }
.qf-progress { height: 6px; background: var(--border); border-radius: 3px; margin-top: 0.75rem; overflow: hidden; display: none; }
.qf-progress.show { display: block; }
.qf-progress > div { height: 100%; width: 0%; background: var(--accent); transition: width 0.2s ease; }
.status-line { font-size: 0.8rem; margin: 0.5rem 0 0; min-height: 1.2em; }
.status-line.ok { color: var(--success); }
.status-line.err { color: var(--danger); }
.warn-box { border: 1px solid rgba(245,158,11,0.45); background: rgba(245,158,11,0.10); border-radius: 12px; padding: 1rem 1.1rem; font-size: 0.9rem; margin-top: 1rem; }
.ftable { width: 100%; border-collapse: collapse; font-size: 0.875rem; margin-top: 0.75rem; }
.ftable th, .ftable td { text-align: left; padding: 0.55rem 0.65rem; border-bottom: 1px solid var(--border); }
.ftable th { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); }

/* ---------- Workbench ---------- */
.workbench { display: grid; grid-template-columns: 1fr 340px; gap: 1.5rem; align-items: start; padding: 2rem 0 2.5rem; }
.config-panel { min-width: 0; }
.preview-panel { position: sticky; top: calc(var(--header-h) + 1.5rem); }
.preview-card { padding: 1.5rem; text-align: center; }
.preview-viewport {
  display: flex; align-items: center; justify-content: center;
  min-height: 240px;
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: 12px;
  margin-bottom: 1.25rem;
  padding: 1.5rem;
}
.preview-viewport svg, .preview-viewport canvas, .preview-viewport img { max-width: 100%; height: auto; }
.preview-actions { display: flex; flex-direction: column; gap: 0.5rem; }
.preview-actions .btn-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }

/* ---------- Page header & steps ---------- */
.page-header { padding: 1.75rem 0 0.5rem; }
.page-header h1 {
  font-size: 1.75rem; font-weight: 700; letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--text) 52%, #d946ef 96%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-header p { margin-top: 0.25rem; font-size: 0.9375rem; }
.step-indicator { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; font-size: 0.8125rem; color: var(--text-muted); }
.step-indicator .active { color: var(--accent); font-weight: 600; }
.step-indicator .sep { opacity: 0.4; }

/* ---------- Tool switcher ---------- */
.switcher-wrap { margin: 1.5rem 0 0.5rem; }
.switcher-label { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-muted); margin: 0 0 0.6rem; }
.tool-switcher { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.switch-pill {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 0.95rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 0.85rem; font-weight: 600; text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.switch-pill:hover { border-color: var(--accent); transform: translateY(-1px); }
.switch-pill.switch-active {
  background: linear-gradient(135deg, #8b5cf6, #d946ef);
  border-color: transparent; color: #ffffff;
  box-shadow: 0 4px 14px rgba(192, 38, 211, 0.35);
}
html.dark .switch-pill.switch-active { background: linear-gradient(135deg, #a78bfa, #e879f9); }

/* ---------- Info block ---------- */
.info-block { margin-top: 2.5rem; padding: 1.5rem; background: var(--surface); border: 1px solid var(--border); border-radius: 18px; }
.info-block h3 { margin-bottom: 0.75rem; font-size: 1rem; }
.info-block p { font-size: 0.875rem; margin-bottom: 0.5rem; }
.info-block p:last-child { margin-bottom: 0; }

/* ---------- Content sections (SEO blocks) ---------- */
.content-sections { padding: 3.5rem 0 1rem; max-width: 900px; margin: 0 auto; }
.cs-block { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 1.75rem; margin-bottom: 1.25rem; }
.cs-block h2 { margin: 0 0 0.75rem; font-size: 1.35rem; letter-spacing: -0.01em; }
.cs-block p { color: var(--text-muted); }
.cs-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.25rem; }
.cs-step { background: var(--surface-2); border: 1px dashed var(--border); border-radius: 12px; padding: 1rem; }
.cs-step .n { display: inline-flex; width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg, #8b5cf6, #d946ef); color: #fff; align-items: center; justify-content: center; font-weight: 700; margin-bottom: 0.5rem; }
.cs-step h3 { margin: 0.25rem 0 0.35rem; font-size: 1rem; }
.cs-step p { margin: 0; font-size: 0.875rem; }
.cs-list { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; gap: 0.6rem; }
.cs-list li { display: flex; gap: 0.55rem; align-items: flex-start; font-size: 0.925rem; }
.cs-list li::before { content: '✓'; color: var(--success); font-weight: 700; flex: none; }
.cs-faq { display: flex; flex-direction: column; gap: 0.6rem; margin-top: 1rem; }
.cs-faq details { border: 1px solid var(--border); border-radius: 10px; padding: 0 1rem; background: var(--surface-2); }
.cs-faq summary { cursor: pointer; font-weight: 600; padding: 0.85rem 0; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.cs-faq summary::-webkit-details-marker { display: none; }
.cs-faq summary::after { content: '+'; color: var(--accent); font-size: 1.15rem; flex: none; }
.cs-faq details[open] summary::after { content: '–'; }
.cs-faq p { margin: 0 0 0.85rem; font-size: 0.9rem; }

/* ---------- Footer ---------- */
.ftr { border-top: 1px solid var(--border); background: var(--surface); margin-top: 3rem; }
.qf-ftr-stripe { height: 4px; background: linear-gradient(90deg, #8b5cf6, #d946ef, #8b5cf6); }
.ftr-inner { max-width: 1200px; margin: 0 auto; padding: 2.75rem 1.25rem 1.5rem; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 2rem; }
.ftr h4 { margin: 0 0 0.8rem; font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted); }
.ftr-brand { font-size: 1.15rem; font-weight: 700; }
.ftr-brand span { color: var(--accent); }
.ftr-tag { color: var(--text-muted); font-size: 0.9rem; margin: 0.5rem 0 0; max-width: 26rem; }
.qf-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.qf-badge { font-size: 0.75rem; font-weight: 600; padding: 0.3rem 0.7rem; border: 1px solid var(--border); border-radius: 999px; background: var(--surface-2); color: var(--text-muted); }
.ftr-col a { display: block; color: var(--text); text-decoration: none; font-size: 0.9rem; padding: 0.22rem 0; opacity: 0.85; }
.ftr-col a:hover { color: var(--accent); opacity: 1; }
.ftr-bottom { border-top: 1px solid var(--border); }
.ftr-bottom-inner { max-width: 1200px; margin: 0 auto; padding: 1.1rem 1.25rem; display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; justify-content: space-between; color: var(--text-muted); font-size: 0.8rem; }

/* ---------- Back to top ---------- */
#qf-to-top {
  position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 60;
  width: 42px; height: 42px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface); color: var(--text);
  font-size: 1.05rem; font-weight: 700; cursor: pointer;
  box-shadow: 0 4px 14px rgba(192, 38, 211, 0.18);
  opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s, border-color 0.15s, color 0.15s;
}
#qf-to-top.show { opacity: 1; visibility: visible; transform: none; }
#qf-to-top:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Scroll reveal ---------- */
@media (prefers-reduced-motion: no-preference) {
  .has-js .qf-reveal { opacity: 0; transform: translateY(16px); }
  .has-js .qf-reveal.qf-in { opacity: 1; transform: none; transition: opacity 0.6s ease, transform 0.6s ease; }
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .workbench { grid-template-columns: 1fr; }
  .preview-panel { position: static; }
  .ftr-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) { .cs-steps { grid-template-columns: 1fr; } }
@media (max-width: 640px) {
  .nav { display: none; }
  .input-row { grid-template-columns: 1fr; }
}
@media (max-width: 520px) { .ftr-inner { grid-template-columns: 1fr; } }

/* Dedicated PDF document operations */
.pdf-ops { margin: 2rem 0 0; padding: 1.5rem; }
.pdf-ops-head { display:flex; justify-content:space-between; align-items:flex-start; gap:1rem; flex-wrap:wrap; }
.pdf-ops-head h2 { margin:0 0 .35rem; }
.pdf-ops-controls { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:1rem; align-items:end; margin-top:1rem; }
.pdf-ops-list { display:grid; gap:.65rem; margin-top:1rem; }
.pdf-op-item { display:grid; grid-template-columns:84px 1fr auto; gap:.75rem; align-items:center; padding:.75rem; border:1px solid var(--border); border-radius:10px; background:var(--surface-2); }
.pdf-op-thumb { width:84px; height:104px; display:grid; place-items:center; background:var(--surface); border:1px solid var(--border); border-radius:6px; overflow:hidden; }
.pdf-op-thumb canvas { max-width:100%; max-height:100%; }
.pdf-op-actions { display:flex; gap:.4rem; flex-wrap:wrap; justify-content:flex-end; }
.pdf-op-actions button { min-width:2.2rem; }
.pdf-op-status { min-height:1.4em; margin-top:.8rem; color:var(--text-muted); }
.pdf-op-status.err { color:var(--danger); }
.pdf-op-warning { margin-top:.8rem; }
@media (max-width:640px) { .pdf-ops-controls { grid-template-columns:1fr; } .pdf-op-item { grid-template-columns:64px 1fr; } .pdf-op-thumb { width:64px; height:84px; } .pdf-op-actions { grid-column:1 / -1; justify-content:flex-start; } }