:root {
  --canvas: #e8efea;
  --paper: #fffdf6;
  --ink: #151515;
  --muted: #5d5b56;
  --line: #242424;
  --accent: #e84f2b;
  --blue: #1e5eff;
  --green: #087b67;
  --yellow: #ffd25c;
  --panel: #f6fbf8;
  --shadow: 7px 7px 0 rgba(21, 21, 21, 0.12);
  --max: 1260px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(21, 21, 21, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, rgba(21, 21, 21, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, #f8fbf8, var(--canvas));
  background-size: 34px 34px, 34px 34px, auto;
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
}

button,
input,
select {
  font: inherit;
}

button,
a,
input,
select {
  outline-offset: 3px;
}

a {
  color: inherit;
}

.shell {
  width: min(calc(100% - 28px), var(--max));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(232, 239, 234, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid rgba(21, 21, 21, 0.1);
}

.topbar-inner {
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border: 2px solid var(--line);
  background:
    linear-gradient(90deg, var(--paper) 0 48%, var(--line) 48% 52%, var(--paper) 52%),
    linear-gradient(180deg, transparent 0 48%, var(--line) 48% 52%, transparent 52%),
    var(--yellow);
  box-shadow: 4px 4px 0 rgba(21, 21, 21, 0.14);
}

nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

nav a {
  text-decoration: none;
  color: var(--muted);
}

nav a:hover {
  color: var(--ink);
}

.tool-hero {
  padding: 10px 0 22px;
}

.tool-shell {
  display: grid;
  grid-template-columns: minmax(300px, 350px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.tool-panel,
.preview-panel,
.content-panel,
.preset-card,
.faq details {
  border: 2px solid var(--line);
  background: rgba(255, 250, 242, 0.94);
  box-shadow: var(--shadow);
}

.tool-panel {
  padding: 12px;
  display: grid;
  gap: 10px;
}

.preview-panel {
  min-height: 0;
  padding: 10px;
  display: grid;
  gap: 8px;
}

.kicker {
  margin: 0;
  color: var(--green);
  font: 800 0.74rem/1.2 "Courier New", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(1.75rem, 3vw, 2.55rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.lede {
  color: var(--muted);
  line-height: 1.35;
  margin: 0;
}

.helper-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.35;
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border: 1px solid var(--line);
  background: #fff;
  font: 800 0.68rem/1 "Courier New", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.controls {
  display: grid;
  gap: 10px;
}

.control-group {
  display: grid;
  gap: 7px;
}

.control-group > label,
.field-label {
  color: var(--muted);
  font: 800 0.72rem/1.2 "Courier New", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.layout-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.layout-btn,
.icon-btn,
.download-btn {
  min-height: 40px;
  border: 2px solid var(--line);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  box-shadow: 3px 3px 0 rgba(21, 21, 21, 0.1);
}

.layout-btn {
  display: grid;
  gap: 5px;
  justify-items: start;
  padding: 7px;
}

.layout-btn[aria-pressed="true"] {
  background: var(--yellow);
}

.mini-layout {
  width: 46px;
  height: 32px;
  display: grid;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.mini-layout span {
  background: var(--blue);
  min-width: 0;
}

.mini-2 { grid-template-columns: 1fr 1fr; }
.mini-3 { grid-template-columns: 1.2fr 0.8fr; grid-template-rows: 1fr 1fr; }
.mini-3 span:first-child { grid-row: span 2; }
.mini-4 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }
.mini-9 { grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr); }
.mini-story { grid-template-columns: 1fr; grid-template-rows: 1.2fr 1fr 1fr; }

.row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

input[type="color"] {
  width: 44px;
  height: 36px;
  padding: 2px;
  border: 2px solid var(--line);
  background: #fff;
}

select {
  width: 100%;
  min-height: 42px;
  border: 2px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 0 10px;
}

.panel-picker {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}

.icon-btn {
  width: 42px;
  font-weight: 900;
}

.icon-btn[aria-pressed="true"] {
  background: var(--accent);
  color: #fff;
}

.icon-btn.has-image::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-left: 5px;
  border-radius: 999px;
  background: var(--green);
  vertical-align: middle;
}

.icon-btn[aria-pressed="true"].has-image::after {
  background: #fff;
}

.panel-upload {
  display: grid;
  gap: 7px;
  padding: 9px;
  border: 2px solid rgba(21, 21, 21, 0.12);
  background: rgba(255, 255, 255, 0.6);
}

.panel-file-input {
  display: none;
}

.utility-btn {
  min-height: 36px;
  border: 2px solid var(--line);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  box-shadow: 3px 3px 0 rgba(21, 21, 21, 0.08);
}

.utility-btn.primary {
  background: var(--yellow);
}

.download-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.download-btn {
  background: var(--ink);
  color: #fff;
  font-weight: 800;
}

.download-btn.secondary {
  background: var(--accent);
}

.fine-tune {
  border-top: 2px solid rgba(21, 21, 21, 0.12);
  padding-top: 4px;
}

.fine-tune summary {
  cursor: pointer;
  color: var(--muted);
  font: 800 0.74rem/1.2 "Courier New", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fine-tune[open] {
  display: grid;
  gap: 10px;
}

.preview-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font: 800 0.74rem/1.2 "Courier New", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.canvas-wrap {
  display: grid;
  place-items: center;
  min-height: 0;
  height: min(68vh, 620px);
  background:
    linear-gradient(45deg, rgba(21, 21, 21, 0.045) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(21, 21, 21, 0.045) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(21, 21, 21, 0.045) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(21, 21, 21, 0.045) 75%);
  background-size: 28px 28px;
  background-position: 0 0, 0 14px, 14px -14px, -14px 0;
  border: 2px solid rgba(21, 21, 21, 0.18);
  overflow: auto;
  padding: 10px;
}

canvas {
  max-width: 100%;
  max-height: calc(min(68vh, 620px) - 24px);
  height: auto;
  background: #fff;
  border: 2px solid var(--line);
  box-shadow: 10px 10px 0 rgba(21, 21, 21, 0.1);
  touch-action: none;
}

.below-fold {
  display: grid;
  gap: 24px;
  padding: 22px 0 70px;
}

.content-panel {
  padding: 22px;
}

.preset-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.preset-card {
  padding: 16px;
  display: grid;
  gap: 10px;
  text-decoration: none;
}

.preset-card p,
.content-panel p,
.faq p {
  color: var(--muted);
  line-height: 1.65;
  margin: 0;
}

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: stretch;
}

.comparison-frame {
  position: relative;
  min-height: 280px;
  border: 2px solid var(--line);
  overflow: hidden;
  background: white;
}

.comparison-side {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  font-weight: 800;
}

.comparison-side.before {
  background: repeating-linear-gradient(45deg, #f1ede5 0 12px, #fff 12px 24px);
  color: var(--muted);
}

.comparison-side.after {
  background: var(--accent-soft);
  clip-path: inset(0 0 0 42%);
}

.comparison-range {
  width: 100%;
  margin-top: 14px;
}

.faq {
  display: grid;
  gap: 10px;
}

.faq details {
  padding: 14px 16px;
}

.faq summary {
  cursor: pointer;
  font-weight: 800;
}

footer {
  border-top: 2px solid rgba(21, 21, 21, 0.12);
  padding: 26px 0 44px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  color: var(--muted);
}

.page-copy {
  padding: 28px 0 70px;
}

.page-copy .content-panel {
  max-width: 860px;
}

@media (max-width: 980px) {
  .tool-shell,
  .preset-strip,
  .compare,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 10px 0;
  }

  .preview-panel {
    min-height: auto;
  }

  .canvas-wrap {
    min-height: 360px;
  }
}

@media (max-width: 560px) {
  .layout-grid,
  .download-row {
    grid-template-columns: 1fr;
  }

  nav {
    font-size: 0.86rem;
  }
}