/* Shared Batch-2 design system: warm paper, ink borders, hard shadows. */
:root {
  --paper: #f2ebde;
  --paper-deep: #e6dac7;
  --card: #fffaf1;
  --card-soft: #fbf3e6;
  --ink: #191510;
  --muted: #6d6255;
  --line: #2b241c;
  --soft-line: #d5c7b2;
  --accent: #e8542b;
  --accent-dark: #a72f12;
  --accent-soft: #f8ddd2;
  --green: #1f6f5a;
  --green-soft: #d9f0c8;
  --warning: #a72f12;
  --shadow: 6px 6px 0 var(--ink);
  --shadow-soft: 3px 3px 0 var(--ink);
  --radius: 18px;
  --radius-sm: 10px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-display: "Songti SC", "Noto Serif CJK SC", "STSong", serif;
  --font-mono: "SFMono-Regular", "Cascadia Mono", "Roboto Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(25, 21, 16, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 21, 16, .035) 1px, transparent 1px);
  background-size: 28px 28px;
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
main { display: block; }
h1, h2, h3, h4, p, ul, ol, dl, dd { overflow-wrap: break-word; }
img, svg, canvas { max-width: 100%; }
svg, canvas { display: block; }
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
button { color: inherit; }
[hidden] { display: none !important; }
::selection { color: var(--card); background: var(--accent-dark); }

.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;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 10px 16px;
  color: var(--card);
  background: var(--ink);
  border: 2px solid var(--card);
  border-radius: 8px;
  text-decoration: none;
}
.skip-link:focus { top: 16px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.shell.narrow { width: min(860px, calc(100% - 40px)); }

/* Header */
.site-header {
  position: relative;
  z-index: 10;
  padding: 22px 0;
  border-bottom: 1px solid rgba(43, 36, 28, .16);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  color: var(--ink);
  background: var(--accent);
  border: 2px solid var(--ink);
  border-radius: 9px;
  box-shadow: 2px 2px 0 var(--ink);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1;
}
.brand-mark:has(i) {
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  place-items: stretch;
}
.brand-mark i { display: block; background: var(--ink); border-radius: 1px; }
.brand-mark i:nth-child(1),
.brand-mark i:nth-child(4) { background: transparent; border: 3px solid var(--ink); }
.brand-mark.small { width: 36px; height: 36px; box-shadow: none; font-size: 16px; }
.brand-copy { display: grid; line-height: 1.15; }
.brand-copy strong { font-size: 18px; letter-spacing: .08em; }
.brand-copy small { margin-top: 4px; color: var(--muted); font-size: 10px; letter-spacing: .09em; }
.top-nav { display: flex; flex-wrap: wrap; gap: 26px; font-size: 14px; }
.top-nav a { position: relative; text-decoration: none; }
.top-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -5px;
  height: 2px;
  background: var(--accent);
  transition: right .2s ease;
}
.top-nav a:hover::after,
.top-nav a:focus-visible::after { right: 0; }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  gap: clamp(40px, 8vw, 110px);
  align-items: center;
  padding-block: clamp(54px, 8vw, 104px) 74px;
}
.hero > :only-child { grid-column: 1 / -1; }
.hero.is-single { grid-template-columns: 1fr; }
.hero-copy { min-width: 0; }
.eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .07em;
}
.eyebrow span {
  padding: 4px 8px;
  color: var(--card);
  background: var(--green);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .09em;
}
.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(54px, 8vw, 100px);
  font-weight: 700;
  line-height: .95;
  letter-spacing: -.06em;
}
.hero h1 em {
  position: relative;
  color: var(--accent);
  font-style: normal;
  z-index: 0;
}
.hero h1 em::after {
  content: "";
  position: absolute;
  z-index: -1;
  left: 0;
  right: 2px;
  bottom: .08em;
  height: .2em;
  background: var(--accent);
  opacity: .18;
  border-radius: 50%;
}
.hero-lead,
.hero-copy > p:not(.eyebrow) {
  max-width: 620px;
  margin: 28px 0 24px;
  color: #51483d;
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.85;
}
.hero-facts,
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}
.hero-facts span,
.hero-tags span {
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: rgba(255, 250, 241, .58);
  font-family: var(--font-mono);
  font-size: 10px;
}
.hero-panel,
.hero-visual,
.hero-card {
  position: relative;
  padding: 24px;
  background: var(--card);
  border: 2px solid var(--ink);
  border-radius: 26px;
  box-shadow: 10px 10px 0 var(--accent);
}
.hero-panel h2,
.hero-card h2 { margin: 0 0 10px; font-family: var(--font-display); font-size: 24px; }
.hero-panel p:last-child,
.hero-card p:last-child { margin-bottom: 0; color: var(--muted); font-size: 14px; }

/* Sections and cards */
.tool-section,
.studio,
.workbench,
.tool-layout,
.batch-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  gap: 30px;
  align-items: start;
  scroll-margin-top: 28px;
}
.tool-section.is-single,
.studio.is-single,
.workbench.is-single,
.tool-layout.is-single { grid-template-columns: 1fr; }
.tool-main,
.tool-side,
.side-stack { min-width: 0; }
.side-stack { display: grid; gap: 20px; align-content: start; }
.card,
.tool-card,
.panel,
.panel-card,
.maker-card,
.editor-card,
.stats-card,
.advanced-card,
.preview-card {
  position: relative;
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}
.card,
.tool-card,
.panel,
.panel-card,
.maker-card,
.editor-card,
.stats-card,
.advanced-card { padding: clamp(22px, 4vw, 38px); }
.preview-card { padding: 22px; position: sticky; top: 24px; box-shadow: 5px 5px 0 var(--green); }
.card + .card,
.tool-card + .tool-card,
.panel + .panel { margin-top: 20px; }
.card-heading,
.settings-title,
.batch-heading,
.tool-heading,
.preview-topline {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}
.card-heading h2,
.card-heading h3,
.batch-heading h2,
.tool-heading h2,
.premium-card h2,
.premium-map h2 {
  margin: 2px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.22;
  letter-spacing: -.025em;
}
.card-heading p:not(.section-index),
.batch-heading p:not(.section-index),
.tool-heading p:not(.section-index) {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}
.section-index {
  margin: 0 0 3px;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.subcard-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 15px;
}
.subcard-heading h3 { margin: 0; font-size: 17px; }
.settings-block,
.subsection {
  margin-top: 28px;
  padding-top: 26px;
  border-top: 1px dashed var(--soft-line);
}
.settings-title { align-items: center; margin-bottom: 18px; }
.settings-title h3 { margin: 1px 0 0; font-size: 18px; }
.status-pill,
.premium-chip,
.mini-badge {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.2;
}
.status-pill { background: var(--paper); }
.status-pill.is-over,
.status-pill.is-error { color: #fff; background: var(--warning); border-color: var(--warning); }
.status-pill.is-ok { color: var(--card); background: var(--green); border-color: var(--green); }
.premium-chip { color: var(--card); background: var(--accent-dark); border-color: var(--accent-dark); }
.mini-badge { background: var(--card-soft); }
.lock-dot,
.tiny-lock {
  display: inline-block;
  padding: 1px 5px;
  color: var(--card);
  background: var(--accent-dark);
  border-radius: 3px;
  font-size: 9px;
  font-weight: 500;
  line-height: 1.55;
  vertical-align: 1px;
}

/* Tabs */
.mode-tabs,
.tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 3px;
  margin: 26px 0 20px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
}
.mode-tab,
.tab {
  min-height: 38px;
  padding: 7px 16px;
  border: 0;
  border-radius: 7px;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
  cursor: pointer;
}
.mode-tab.is-active,
.mode-tab[aria-selected="true"],
.tab.is-active,
.tab[aria-selected="true"] {
  color: var(--card);
  background: var(--ink);
  box-shadow: 2px 2px 0 var(--accent);
}
.mode-panel + .mode-panel { margin-top: 0; }

/* Forms */
.field,
.field-label,
.range-field,
.color-field { display: block; }
.field-label,
.field > span,
.range-field > span,
.color-field > span,
.input-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 650;
}
.field-label + *,
.field > span + * { margin-top: 0; }
textarea,
input[type="text"],
input[type="number"],
input[type="email"],
input[type="url"],
input[type="search"],
input[type="password"],
input[type="tel"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
input[type="month"],
input[type="week"],
input:not([type]),
select {
  width: 100%;
  min-height: 44px;
  padding: 12px 14px;
  color: var(--ink);
  background: #fffdf8;
  border: 1.5px solid #8a7b68;
  border-radius: var(--radius-sm);
  outline: 0;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
textarea {
  min-height: 122px;
  line-height: 1.7;
  resize: vertical;
}
textarea::placeholder,
input::placeholder { color: #9a8d7d; }
textarea:focus,
input[type="text"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
input[type="url"]:focus,
input[type="search"]:focus,
input[type="password"]:focus,
input[type="tel"]:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
textarea:disabled,
input:disabled,
select:disabled {
  color: #8b8175;
  background: #eee6da;
  cursor: not-allowed;
}
.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 15px;
}
.field-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.field-wide { grid-column: 1 / -1; }
.field-help,
.mini-note,
.field-note {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.65;
}
.input-row,
.input-group,
.code-row {
  display: flex;
  align-items: stretch;
  gap: 9px;
}
.input-row > input,
.input-row > textarea,
.input-group > input,
.input-group > textarea,
.code-row > input { flex: 1; min-width: 0; }
.input-row > .button,
.input-row > .solid-button,
.input-row > .outline-button,
.input-group > .button,
.code-row > .tool-button { flex: 0 0 auto; }
.check-row,
.check-label {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  font-size: 13px;
  cursor: pointer;
}
.check-row input,
.check-label input,
input[type="checkbox"],
input[type="radio"] {
  width: 19px;
  height: 19px;
  flex: 0 0 auto;
  accent-color: var(--accent);
}
.check-row.is-wide { grid-column: 1 / -1; }
.range-field > span { justify-content: space-between; margin-bottom: 4px; }
.range-field output,
output {
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
}
input[type="range"] {
  width: 100%;
  height: 6px;
  min-height: 44px;
  accent-color: var(--accent);
  cursor: pointer;
  background: transparent;
}
input[type="color"] {
  width: 46px;
  height: 38px;
  min-width: 44px;
  padding: 3px;
  border: 1.5px solid #8a7b68;
  border-radius: 8px;
  background: var(--card);
  cursor: pointer;
}
input[type="file"] { max-width: 100%; }
.color-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 13px;
}
.color-field {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--soft-line);
  border-radius: var(--radius-sm);
  background: var(--paper);
}
.color-field > span { margin: 0; }
.form-error {
  margin: 13px 0 0;
  color: #9c2813;
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1.6;
}
.form-success {
  margin: 13px 0 0;
  color: var(--green);
  font-size: 12.5px;
  font-weight: 600;
}
.form-actions,
.button-row,
.button-group,
.maker-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
}
.form-actions .mini-note,
.button-row .mini-note { margin: 0; }
.form-actions.is-end,
.button-row.is-end { justify-content: flex-end; }
select {
  appearance: none;
  padding-right: 38px;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ink) 50%),
    linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%;
  background-repeat: no-repeat;
  background-size: 5px 5px, 5px 5px;
}

/* Buttons */
.button,
.button-primary,
.button-dark,
.button-quiet,
.button-ghost,
.solid-button,
.outline-button,
.tool-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 18px;
  color: var(--ink);
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 650;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
}
.button:hover:not(:disabled),
.button-primary:hover:not(:disabled),
.button-dark:hover:not(:disabled),
.button-quiet:hover:not(:disabled),
.button-ghost:hover:not(:disabled),
.solid-button:hover:not(:disabled),
.outline-button:hover:not(:disabled),
.tool-button:hover:not(:disabled) {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--ink);
}
.button:active:not(:disabled),
.button-primary:active:not(:disabled),
.button-dark:active:not(:disabled),
.button-quiet:active:not(:disabled),
.button-ghost:active:not(:disabled),
.solid-button:active:not(:disabled),
.outline-button:active:not(:disabled),
.tool-button:active:not(:disabled) {
  transform: translate(1px, 1px);
  box-shadow: none;
}
.button:disabled,
.button-primary:disabled,
.button-dark:disabled,
.button-quiet:disabled,
.button-ghost:disabled,
.solid-button:disabled,
.outline-button:disabled,
.tool-button:disabled {
  opacity: .5;
  cursor: not-allowed;
}
.solid-button,
.button-primary,
.button-dark {
  color: var(--card);
  background: var(--accent);
  border-color: var(--ink);
  box-shadow: var(--shadow-soft);
}
.outline-button { background: transparent; }
.button-dark { background: var(--ink); }
.button-primary span { font-size: 18px; line-height: 1; }
.button-quiet,
.button-ghost { background: var(--paper); }
.button-small { min-height: 44px; padding: 8px 12px; font-size: 12px; }
.tool-button {
  min-height: 44px;
  padding: 8px 13px;
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
}
.tool-button.is-active { color: var(--card); background: var(--ink); border-color: var(--ink); }
.text-button,
.link-button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0;
  color: var(--accent-dark);
  background: transparent;
  border: 0;
  font-size: 12px;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.copy-button {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 8px 13px;
  color: var(--accent-dark);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 650;
  cursor: pointer;
}
.copy-button.is-copied { color: var(--ink); background: var(--green-soft); border-color: var(--green); }
.button-row .button,
.button-row .solid-button,
.button-row .outline-button { flex: 0 1 auto; }
.button-block { width: 100%; }

/* Results and data */
#result,
.result,
.result-box,
.result-panel,
.output-box,
.result-output {
  margin-top: 20px;
  padding: clamp(16px, 2.6vw, 22px);
  color: var(--ink);
  background: var(--card-soft);
  border: 1px dashed #b3a28b;
  border-radius: var(--radius-sm);
  font-size: 15px;
  line-height: 1.75;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
#result:empty::before,
.result-box:empty::before,
.output-box:empty::before {
  content: "结果会显示在这里";
  color: var(--muted);
  font-size: 13px;
}
.result-output,
pre,
code,
kbd,
samp { font-family: var(--font-mono); }
pre {
  margin: 14px 0 0;
  padding: 14px;
  max-width: 100%;
  overflow: auto;
  color: var(--ink);
  background: var(--paper-deep);
  border: 1px solid var(--soft-line);
  border-radius: 8px;
  font-size: 12.5px;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
code { font-size: .92em; }
.result-actions,
.output-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 12px;
}
.result-meta,
.result-caption {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 11.5px;
}
.stats-grid,
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 10px;
  margin-top: 16px;
}
.stat {
  padding: 12px;
  background: var(--paper);
  border: 1px solid var(--soft-line);
  border-radius: 8px;
}
.stat strong { display: block; font-family: var(--font-mono); font-size: 20px; line-height: 1.2; }
.stat span,
.stat small { color: var(--muted); font-size: 10px; }
.usage-meter {
  width: 100%;
  height: 8px;
  margin-top: 12px;
  overflow: hidden;
  background: var(--paper-deep);
  border: 1px solid var(--soft-line);
  border-radius: 100px;
}
.usage-meter > i,
.usage-bar {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
  border-radius: inherit;
  transition: width .2s ease;
}
.usage-meter.is-over > i,
.usage-bar.is-over { background: var(--warning); }
.empty-state {
  padding: 28px 18px;
  color: var(--muted);
  text-align: center;
  border: 1px dashed #b3a28b;
  border-radius: var(--radius-sm);
  background: var(--card-soft);
  font-size: 13px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th, td {
  padding: 9px 10px;
  border-bottom: 1px solid var(--soft-line);
  text-align: left;
  vertical-align: top;
}
th { color: var(--muted); font-size: 11px; font-weight: 650; }
tbody tr:last-child td { border-bottom: 0; }
.table-wrap { max-width: 100%; overflow-x: auto; }

/* How-to and FAQ */
.guide-shell,
.faq-shell {
  margin-top: 52px;
  scroll-margin-top: 28px;
}
.guide-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--soft-line);
}
.guide-heading h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.05;
  letter-spacing: -.05em;
}
.guide-heading > p {
  max-width: 440px;
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}
.how-to-grid,
.howto-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.how-to-grid li,
.howto-grid li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 20px;
  background: var(--card);
  border: 1.5px solid var(--ink);
  border-radius: 14px;
  box-shadow: 3px 3px 0 var(--ink);
}
.how-to-grid li > span,
.howto-grid li > span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--card);
  background: var(--accent);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}
.how-to-grid h3,
.howto-grid h3 { margin: 1px 0 8px; font-size: 16px; }
.how-to-grid p,
.howto-grid p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.75; }
.faq-list {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}
.faq-list details {
  overflow: clip;
  background: rgba(255, 250, 241, .72);
  border: 1px solid var(--soft-line);
  border-radius: 12px;
}
.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 54px;
  padding: 14px 18px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 650;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  flex: 0 0 auto;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
}
.faq-list details[open] summary { border-bottom: 1px dashed var(--soft-line); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list p {
  margin: 0;
  padding: 14px 18px 17px;
  color: #5e5549;
  font-size: 13px;
  line-height: 1.85;
}

/* Unlock and premium card */
.unlock-section {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr);
  gap: 30px;
  align-items: start;
  margin-block: 42px;
  scroll-margin-top: 28px;
}
.unlock-section > [data-referral] { min-width: 0; }
.premium-card,
.premium-map {
  padding: clamp(24px, 4vw, 36px);
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 5px 5px 0 var(--accent);
}
.premium-card ul,
.premium-map ul,
.premium-list {
  display: grid;
  gap: 11px;
  margin: 22px 0;
  padding: 0;
  list-style: none;
}
.premium-card li,
.premium-map li,
.premium-list li {
  display: flex;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--soft-line);
  font-size: 13px;
}
.premium-card li span,
.premium-map li span,
.premium-list li span {
  flex: 0 0 auto;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 10px;
}
.premium-card > p:last-child,
.premium-map > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 11.5px;
}
.premium-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}
.lock-note,
.premium-note,
.batch-lock-note {
  margin: 18px 0;
  padding: 11px 13px;
  color: #7a2816;
  background: #ffe7dc;
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  font-size: 12px;
  line-height: 1.7;
}
[data-lock] {
  border-left-color: var(--accent);
}
body.is-premium [data-lock] { display: none !important; }
body.is-premium .premium-chip { background: var(--green); border-color: var(--green); }
body.is-premium .premium-card,
body.is-premium .premium-map { box-shadow: 5px 5px 0 var(--green); }
body.is-premium .lock-note { display: none; }
[data-premium-control]:disabled { opacity: .58; }

/* Shared referral card (built by referral.js) */
.referral-card {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 36px);
  color: #fff7eb;
  background: #17130f;
  border: 1.5px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: 7px 7px 0 var(--accent);
}
.referral-card::after {
  content: "";
  position: absolute;
  width: 190px;
  height: 190px;
  right: -75px;
  top: -100px;
  border: 30px solid var(--accent);
  border-radius: 50%;
  opacity: .22;
  pointer-events: none;
}
.referral-kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #cbbba7;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
}
.referral-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
}
.referral-heading {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-top: 16px;
}
.referral-heading h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(25px, 3vw, 35px);
  line-height: 1.22;
  letter-spacing: -.03em;
}
.referral-heading p {
  max-width: 560px;
  margin: 9px 0 0;
  color: #bfae9a;
  font-size: 12.5px;
}
.referral-badge {
  flex: 0 0 auto;
  padding: 5px 9px;
  color: #cfbea9;
  border: 1px solid #746353;
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 9px;
}
.referral-badge.is-unlocked,
.referral-badge.is-trial {
  color: #17130f;
  background: var(--green-soft);
  border-color: var(--green-soft);
}
.referral-badge.is-trial { background: #ffd9c8; border-color: #ffd9c8; }
.referral-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 21px;
  color: #d9cbbd;
  font-size: 12px;
}
.referral-steps { display: flex; gap: 5px; }
.referral-steps i {
  width: 34px;
  height: 5px;
  border-radius: 10px;
  background: #493f35;
}
.referral-steps i.is-filled { background: var(--accent); }
.referral-label {
  display: block;
  margin: 24px 0 7px;
  color: #ad9d8a;
  font-size: 10px;
}
.referral-copy-row { display: flex; gap: 8px; }
.referral-link {
  min-width: 0;
  flex: 1;
  color: #efe4d6 !important;
  background: #2a241e !important;
  border-color: #51463b !important;
  font-family: var(--font-mono);
  font-size: 11px;
}
.referral-copy {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 9px 14px;
  color: #17130f;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}
.referral-copy.is-copied { background: var(--green-soft); border-color: var(--green-soft); }
.referral-foot {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-top: 12px;
  color: #918271;
  font-size: 10.5px;
}
.referral-refresh {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 0;
  color: #c8b8a6;
  background: transparent;
  border: 0;
  border-bottom: 1px solid #6a5b4d;
  font-size: 10px;
  cursor: pointer;
}
.referral-refresh:hover { color: #fff7eb; }
.referral-trial {
  margin-top: 15px;
  padding: 9px 11px;
  color: #ffe1d3;
  background: rgba(232, 84, 43, .15);
  border: 1px solid rgba(232, 84, 43, .32);
  border-radius: 7px;
  font-size: 11px;
}

/* Share prompt (built by referral.js) */
.share-prompt {
  position: fixed;
  z-index: 80;
  left: 50%;
  bottom: 18px;
  width: min(660px, calc(100% - 24px));
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 54px 14px 18px;
  color: var(--card);
  background: var(--ink);
  border: 1.5px solid var(--card);
  border-radius: 14px;
  box-shadow: 5px 5px 0 var(--accent);
  transform: translateX(-50%);
  animation: share-prompt-in .2s ease-out;
}
body.has-share-prompt { padding-bottom: 96px; }
.share-prompt-copy {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  gap: 0 5px;
  min-width: 0;
  line-height: 1.5;
}
.share-prompt-copy strong { font-size: 13px; }
.share-prompt-copy span { color: #d2c4b4; font-size: 12px; }
.share-prompt-action {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 9px 15px;
  color: var(--ink);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}
.share-prompt-action.is-copied { background: var(--green-soft); border-color: var(--green-soft); }
.share-prompt-close {
  position: absolute;
  top: 50%;
  right: 8px;
  width: 44px;
  height: 44px;
  padding: 0;
  color: #d9cbbc;
  background: transparent;
  border: 0;
  border-radius: 50%;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  transform: translateY(-50%);
}
.share-prompt-close:hover { color: var(--card); background: rgba(255, 255, 255, .08); }
.share-prompt.is-leaving {
  opacity: 0;
  transform: translateX(-50%) translateY(8px);
  transition: opacity .18s ease, transform .18s ease;
}
@keyframes share-prompt-in {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Footer */
.site-footer {
  margin-top: 78px;
  padding: 36px 0 22px;
  color: #f4ecdf;
  background: var(--ink);
}
.footer-main {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 30px;
}
.footer-brand { display: flex; gap: 13px; align-items: center; }
.footer-brand p { margin: 2px 0 0; color: #ad9f8d; font-size: 11px; }
.footer-brand strong { letter-spacing: .08em; }
.footer-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  color: var(--ink);
  background: var(--accent);
  border: 1px solid #f4ecdf;
  border-radius: 9px;
  font-family: var(--font-display);
  font-weight: 700;
}
.footer-links,
#toolLinks {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 22px;
  max-width: 760px;
  font-size: 12px;
}
.footer-links a,
#toolLinks a { color: #d9cdbd; text-decoration: none; }
.footer-links a:hover,
#toolLinks a:hover { color: var(--accent); }
.footer-base {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 30px;
  padding-top: 17px;
  border-top: 1px solid #3a332c;
  color: #84796d;
  font-family: var(--font-mono);
  font-size: 9.5px;
}

/* Responsive */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-bottom: 54px; }
  .hero-panel,
  .hero-visual,
  .hero-card { justify-self: start; width: min(100%, 460px); }
  .tool-section,
  .studio,
  .workbench,
  .tool-layout,
  .batch-shell,
  .unlock-section { grid-template-columns: 1fr; }
  .preview-card { position: static; }
  .side-stack { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card,
  .tool-card,
  .panel,
  .panel-card { box-shadow: 4px 4px 0 var(--ink); }
}

@media (max-width: 700px) {
  body { overflow-x: hidden; }
  .shell,
  .shell.narrow { width: min(100% - 24px, 1180px); }
  .site-header { padding: 15px 0; }
  .header-inner { gap: 14px; }
  .brand-copy strong { font-size: 16px; }
  .brand-copy small { display: none; }
  .top-nav { gap: 14px; font-size: 12px; }
  .hero { gap: 34px; padding-top: 46px; }
  .hero h1 { font-size: clamp(46px, 16vw, 70px); }
  .hero-lead,
  .hero-copy > p:not(.eyebrow) { margin-top: 22px; font-size: 15px; }
  .hero-panel,
  .hero-visual,
  .hero-card { padding: 19px; box-shadow: 7px 7px 0 var(--accent); }
  .card,
  .tool-card,
  .panel,
  .panel-card,
  .maker-card,
  .editor-card,
  .stats-card,
  .advanced-card { padding: 20px; box-shadow: 4px 4px 0 var(--ink); }
  .preview-card { padding: 18px; box-shadow: 4px 4px 0 var(--green); }
  .card-heading,
  .batch-heading,
  .tool-heading,
  .settings-title { align-items: flex-start; }
  .card-heading { flex-direction: column; gap: 9px; }
  .field-grid,
  .field-grid.three,
  .color-grid { grid-template-columns: 1fr; }
  .field-wide { grid-column: auto; }
  .input-row,
  .input-group,
  .code-row { flex-wrap: wrap; }
  .input-row > .button,
  .input-row > .solid-button,
  .input-row > .outline-button,
  .input-group > .button { flex: 1 0 100%; }
  .side-stack { grid-template-columns: 1fr; }
  .guide-shell,
  .faq-shell { margin-top: 42px; }
  .guide-heading { align-items: flex-start; flex-direction: column; gap: 8px; }
  .guide-heading > p { max-width: none; text-align: left; }
  .how-to-grid,
  .howto-grid { grid-template-columns: 1fr; }
  .footer-main,
  .footer-base { flex-direction: column; }
  .footer-links,
  #toolLinks { justify-content: flex-start; gap: 4px 18px; }
  .referral-heading { flex-direction: column; }
  .referral-copy-row { flex-direction: column; }
  .referral-copy { width: 100%; }
  .referral-foot { flex-direction: column; gap: 8px; }
  .share-prompt { align-items: stretch; flex-direction: column; gap: 10px; padding-right: 54px; }
  .share-prompt-action { width: 100%; }
  body.has-share-prompt { padding-bottom: 150px; }
  .table-wrap { margin-inline: -6px; }
}

@media (max-width: 400px) {
  .shell,
  .shell.narrow { width: min(100% - 20px, 1180px); }
  .hero { gap: 28px; padding-top: 38px; padding-bottom: 44px; }
  .hero h1 { font-size: clamp(42px, 15vw, 56px); }
  .hero-lead,
  .hero-copy > p:not(.eyebrow) { font-size: 14px; line-height: 1.8; }
  .card,
  .tool-card,
  .panel,
  .panel-card,
  .maker-card,
  .editor-card,
  .stats-card,
  .advanced-card { padding: 18px; }
  .form-actions,
  .button-row,
  .button-group,
  .maker-actions { align-items: stretch; flex-direction: column; }
  .form-actions > .button,
  .form-actions > .solid-button,
  .form-actions > .outline-button,
  .button-row > .button,
  .button-row > .solid-button,
  .button-row > .outline-button,
  .maker-actions > .button,
  .maker-actions > .solid-button,
  .maker-actions > .outline-button { width: 100%; }
  .how-to-grid li,
  .howto-grid li { grid-template-columns: 38px minmax(0, 1fr); gap: 11px; padding: 17px; }
  .how-to-grid li > span,
  .howto-grid li > span { width: 36px; height: 36px; font-size: 11px; }
  .faq-list summary { padding-inline: 14px; font-size: 13px; }
  .faq-list p { padding-inline: 14px; }
  .premium-card,
  .premium-map,
  .referral-card { padding: 20px; }
  .stats-grid,
  .stat-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 700px), (pointer: coarse) {
  button,
  .button,
  .solid-button,
  .outline-button,
  .tool-button,
  .copy-button,
  .mode-tab,
  .tab,
  select,
  input:not([type="range"]):not([type="checkbox"]):not([type="radio"]),
  textarea { min-height: 44px; }
  input[type="range"] { min-height: 44px; }
  input[type="checkbox"],
  input[type="radio"] { width: 22px; height: 22px; }
  input[type="color"] { min-width: 44px; }
  .brand,
  .top-nav a,
  .footer-links a,
  #toolLinks a,
  .text-button,
  .link-button,
  .referral-refresh,
  .check-row,
  .check-label,
  .file-button { display: inline-flex; align-items: center; min-height: 44px; }
  .faq-list summary { min-height: 54px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  body { background: #fff; }
  .site-header,
  .site-footer,
  .share-prompt,
  .referral-card,
  .skip-link { display: none !important; }
  .card,
  .tool-card,
  .panel,
  .premium-card { box-shadow: none; }
}