/* =========================================================
   QRForge — TEXT & DEV TOOLS (fully self-contained stylesheet)
   Base design + TERMINAL skin + extras, merged into one file.
   Linked ONLY by pages inside /utils/. No ../ paths, no skin
   class needed — everything applies directly.
   ========================================================= */

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

/* ---------- Tokens ---------- */
:root {
  --bg: #faf7f2;
  --surface: #fffdf9;
  --surface-2: #f5f0e8;
  --text: #1c1917;
  --text-muted: #78716c;
  --border: #e7e0d5;
  --accent: #c2410c;
  --accent-hover: #9a3412;
  --accent-subtle: #fff7ed;
  --danger: #dc2626;  --danger-bg: #fef2f2;
  --success: #16a34a; --success-bg: #f0fdf4;
  --radius: 6px; --radius-sm: 4px;
  --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: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --term-bg: #0f172a;
  --term-border: #334155;
  --term-text: #e2e8f0;
  --term-muted: #64748b;
}

html.dark {
  --bg: #0a0f1a;
  --surface: #0f172a;
  --surface-2: #1e293b;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: #1e293b;
  --accent: #ea580c;
  --accent-hover: #fb923c;
  --accent-subtle: #431407;
  --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 (dot-grid paper) ---------- */
*, *::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);
  font-size: 0.94rem;
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg);
  background-image: radial-gradient(rgba(194, 65, 12, 0.09) 1px, transparent 1px);
  background-size: 16px 16px;
}
html.dark body {
  background-image: radial-gradient(rgba(234, 88, 12, 0.13) 1px, transparent 1px);
}

::selection { background: rgba(194, 65, 12, 0.22); }

h1, h2, h3, h4 { font-weight: 700; color: var(--text); letter-spacing: -0.01em; }
h1 { font-size: 1.9rem; line-height: 1.25; }
h2 { font-size: 1.35rem; line-height: 1.3; }
h3 { font-size: 1.05rem; 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 (orange rule, ~/ prompts) ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-h);
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--accent) 2.5%, var(--surface));
  border-bottom: 2px solid var(--accent);
  box-shadow: 0 2px 0 var(--accent);
}
.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: 0.4rem; font-weight: 700; font-size: 1.1rem; color: var(--text); }
.logo::before { content: "~"; color: var(--accent); opacity: 0.6; }
.logo span { color: var(--accent); }
.logo:hover { color: var(--text); }

.nav { display: flex; align-items: center; gap: 0.15rem; }
.nav a {
  padding: 0.42rem 0.6rem;
  font-size: 0.84rem; font-weight: 600;
  color: var(--text-muted);
  border: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.nav a::before { content: "~/"; color: var(--accent); opacity: 0.5; margin-right: 0.1rem; }
.nav a:hover { color: var(--accent); border-color: transparent; box-shadow: 0 2px 0 var(--accent); }
.nav a.active { color: var(--accent); font-weight: 700; box-shadow: 0 2px 0 var(--accent); }

.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: var(--radius-sm);
  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(--accent); border-color: var(--accent); }
.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 (square, [bracketed]) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.55rem 1rem;
  font-family: var(--font);
  font-size: 0.84rem; font-weight: 600;
  border-radius: 0;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer; white-space: nowrap;
  box-shadow: 0 2px 0 var(--border);
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease, transform 0.1s 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 { background: transparent; color: var(--accent); border-color: var(--accent); }
.btn-primary::before { content: "[ "; opacity: 0.55; }
.btn-primary::after { content: " ]"; opacity: 0.55; }
.btn-primary:hover:not(:disabled) { background: var(--accent); color: #fff; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(194, 65, 12, 0.16); }
html.dark .btn-primary:hover:not(:disabled) { color: #0a0f1a; }

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

.btn-ghost { background: transparent; color: var(--text-muted); border-color: transparent; box-shadow: none; }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }

/* ---------- Cards (terminal window with traffic lights) ---------- */
.card {
  background: var(--surface);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, var(--border));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { border-color: var(--accent); }

.preview-card {
  position: relative;
  border-color: var(--accent);
  padding-top: 1.85rem;
}
.preview-card::before {
  content: "";
  position: absolute;
  top: 0.65rem; left: 0.9rem;
  width: 42px; height: 9px;
  background:
    radial-gradient(circle at 5px 4.5px, #ef4444 3.5px, transparent 4.5px),
    radial-gradient(circle at 21px 4.5px, #f59e0b 3.5px, transparent 4.5px),
    radial-gradient(circle at 37px 4.5px, #22c55e 3.5px, transparent 4.5px);
}

/* ---------- Forms (dark terminal inputs) ---------- */
.form-group { margin-bottom: 1.25rem; }
label { display: block; font-size: 0.8rem; font-weight: 600; 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="password"],
input[type="search"], textarea, select {
  width: 100%; padding: 0.6rem 0.75rem;
  font-family: var(--font);
  font-size: 0.875rem; color: var(--term-text);
  background: var(--term-bg);
  border: 1px solid var(--term-border);
  border-radius: 0;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
input::placeholder, textarea::placeholder { color: var(--term-muted); }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: #ea580c;
  box-shadow: 0 0 0 2.5px rgba(194, 65, 12, 0.2);
}
textarea { line-height: 1.6; }
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='%2394a3b8' 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[type="range"] { width: 100%; padding: 0.35rem 0; accent-color: var(--accent); background: transparent; border: none; box-shadow: none; }
input[type="range"]:focus { box-shadow: none; }
input[type="checkbox"], input[type="radio"] { width: auto; accent-color: var(--accent); }
input[type="color"] {
  width: 48px; height: 40px; padding: 0.2rem;
  border: 1px solid var(--border); border-radius: 0;
  background: var(--surface); cursor: pointer;
}
.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"] { flex-shrink: 0; }

/* ---------- Alerts / status / warn ---------- */
.alert { padding: 0.75rem 1rem; border-radius: 0; 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); }
.status-line { font-size: 0.78rem; 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: var(--radius); padding: 1rem 1.1rem; font-size: 0.85rem; margin-top: 1rem; }

/* ---------- Tables ---------- */
.ftable { width: 100%; border-collapse: collapse; font-size: 0.82rem; margin-top: 0.75rem; }
.ftable th { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); padding: 0.5rem 0.6rem; border-bottom: 2px solid var(--border); text-align: left; }
.ftable td { padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border); }
.ftable tbody tr:hover { background: color-mix(in srgb, var(--accent) 5%, transparent); }

/* ---------- Workbench (single column — terminal full-width) ---------- */
.workbench { display: grid; grid-template-columns: 1fr; gap: 1.4rem; align-items: start; padding: 2rem 0 2.5rem; }
.config-panel { min-width: 0; }
.preview-panel { position: static; }
.preview-card { padding: 1.85rem 1.5rem 1.5rem; }
.preview-viewport {
  display: flex; flex-direction: column; justify-content: center;
  min-height: 200px;
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  padding: 1.25rem;
}
.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 (blinking cursor H1) ---------- */
.page-header { padding: 1.75rem 0 0.5rem; }
.page-header h1 { font-size: 1.6rem; }
.page-header h1::after {
  content: "▋";
  color: var(--accent);
  margin-left: 0.2rem;
  animation: term-blink 1.1s steps(1) infinite;
}
@keyframes term-blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .page-header h1::after { animation: none; } }
.page-header p { margin-top: 0.25rem; font-size: 0.9rem; }

.step-indicator { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; font-size: 0.78rem; color: var(--text-muted); }
.step-indicator .active { color: var(--accent); font-weight: 700; }
.step-indicator .sep { opacity: 0.4; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin: 3rem 0; }
.step { text-align: center; padding: 1.5rem 1rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; background: var(--accent); color: #fff; font-weight: 700; font-size: 0.85rem; border-radius: 0; margin-bottom: 0.75rem; }
.step h3 { font-size: 0.95rem; margin-bottom: 0.35rem; }
.step p { font-size: 0.8rem; }

/* ---------- Tool switcher (square, > prompt) ---------- */
.switcher-wrap { margin: 1.5rem 0 0.5rem; }
.switcher-label { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted); margin: 0 0 0.6rem; }
.switcher-label::before { content: "> "; color: var(--accent); }
.tool-switcher { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.switch-pill {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.45rem 0.85rem; border-radius: 0;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 0.8rem; font-weight: 600; text-decoration: none;
  box-shadow: 0 2px 0 var(--border);
  transition: border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.switch-pill:hover { border-color: var(--accent); color: var(--accent); }
.switch-pill.switch-active { background: var(--accent); border-color: var(--accent); color: #fff; box-shadow: 0 2px 0 var(--accent-hover); }

/* ---------- Info block ---------- */
.info-block { margin-top: 2.5rem; padding: 1.5rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.info-block h3 { margin-bottom: 0.75rem; font-size: 0.95rem; }
.info-block h3::before { content: "# "; color: var(--accent); }
.info-block p { font-size: 0.85rem; margin-bottom: 0.5rem; }
.info-block p:last-child { margin-bottom: 0; }

/* ---------- Content sections (markdown headings) ---------- */
.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: var(--radius); padding: 1.75rem; margin-bottom: 1.25rem; }
.cs-block h2 { margin: 0 0 0.75rem; font-size: 1.25rem; }
.cs-block h2::before { content: "# "; color: var(--accent); }
.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: var(--radius-sm); padding: 1rem; }
.cs-step .n { display: inline-flex; width: 26px; height: 26px; border-radius: 0; background: var(--accent); 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: 0.95rem; }
.cs-step p { margin: 0; font-size: 0.82rem; }
.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: 0.88rem; }
.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: var(--radius-sm); 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; font-size: 0.9rem; }
.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: 0.85rem; }

/* ---------- Footer ---------- */
.ftr { border-top: 1px solid var(--border); background: var(--surface); margin-top: 3rem; }
.qf-ftr-stripe { height: 4px; background: repeating-linear-gradient(90deg, var(--accent) 0 8px, transparent 8px 16px); opacity: 0.5; }
.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: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted); }
.ftr h4::before { content: "~/"; color: var(--accent); opacity: 0.6; margin-right: 0.25rem; }
.ftr-brand { font-size: 1.1rem; font-weight: 700; }
.ftr-brand span { color: var(--accent); }
.ftr-tag { color: var(--text-muted); font-size: 0.85rem; 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: 0.72rem; font-weight: 600; padding: 0.3rem 0.65rem; border: 1px solid var(--border); border-radius: 0; background: var(--surface-2); color: var(--text-muted); }
.ftr-col a { display: block; color: var(--text); text-decoration: none; font-size: 0.84rem; 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: 0.78rem; }

/* ---------- Back to top ---------- */
#qf-to-top {
  position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 60;
  width: 42px; height: 42px;
  border-radius: 0;
  border: 1px solid var(--border);
  background: var(--surface); color: var(--text);
  font-family: var(--font);
  font-size: 1rem; font-weight: 700; cursor: pointer;
  box-shadow: 0 2px 0 var(--border);
  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); }
#qf-to-top::before { content: "^"; }

/* ---------- 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; }
}

/* ---------- Utilities ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.hidden { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) { .ftr-inner { grid-template-columns: 1fr 1fr; } }
@media (max-width: 760px) { .cs-steps, .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; } }