:root {
  color-scheme: light;
  --ink: #4f4f4f;
  --muted: #746c68;
  --surface: #f7f0ec;
  --panel: #ffffff;
  --line: #e6d9d2;
  --accent: #d37272;
  --accent-dark: #bf5e5e;
  --slider: #996a0f;
  --clay: #dd8f76;
  --rose: #a7675e;
  --shadow: 0 18px 50px rgba(78, 59, 45, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Work Sans", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--surface);
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(280px, 600px) minmax(560px, 1200px);
  justify-content: center;
  gap: 28px;
  min-height: 100vh;
  padding: 28px;
}

.controls-panel,
.preview-panel {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(166, 103, 94, 0.2);
  box-shadow: var(--shadow);
}

.controls-panel {
  align-self: start;
  border-radius: 8px;
  padding: 26px;
}

.brand-block {
  margin-bottom: 24px;
}

.site-logo-link {
  display: block;
  width: min(190px, 58%);
  margin: 0 0 22px;
}

.site-logo-link:focus-visible {
  outline: 3px solid rgba(211, 114, 114, 0.28);
  outline-offset: 6px;
  border-radius: 6px;
}

.site-logo {
  display: block;
  width: 100%;
  height: auto;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.77rem;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: none;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 37px;
  font-weight: 700;
  line-height: calc(0.95em + 1px);
  letter-spacing: 0;
}

.brand-block p:last-child {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.controls-grid {
  display: grid;
  gap: 18px;
}

.paper-type-control {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0 0 4px;
  padding: 0;
  border: 0;
}

.paper-type-control legend {
  grid-column: 1 / -1;
  margin: 0 0 5px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  text-transform: uppercase;
}

.paper-type-control label {
  display: block;
  position: relative;
  min-height: 42px;
  padding: 0;
}

.paper-type-control input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.paper-type-control span {
  display: grid;
  place-items: center;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  background: #fff;
  font-size: 0.9rem;
}

.paper-type-control input:checked + span {
  color: #fff;
  border-color: var(--accent);
  background: var(--accent);
}

.paper-type-control input:focus-visible + span {
  outline: 3px solid rgba(211, 114, 114, 0.28);
  outline-offset: 2px;
}

label {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 14px;
  align-items: center;
  min-width: 0;
  color: var(--ink);
  font-weight: 500;
}

label.is-hidden {
  display: none;
}

output {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
}

input[type="range"] {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--slider);
}

input[type="color"] {
  justify-self: end;
  width: 46px;
  height: 34px;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 24px;
}

button {
  min-height: 44px;
  border: 0;
  border-radius: 6px;
  padding: 0 14px;
  color: #fff;
  background: var(--accent);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

button.secondary {
  color: #fff;
  background: var(--slider);
}

button.secondary:hover {
  background: #7f570b;
}

button.ghost {
  grid-column: 1 / -1;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
}

button.ghost:hover {
  background: #f7ece7;
}

.preview-panel {
  display: grid;
  place-items: center;
  align-content: start;
  gap: 18px;
  overflow: auto;
  border-radius: 8px;
  padding: 28px;
}

.preview-title {
  margin: 0;
  color: #4f4f4f;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  text-transform: uppercase;
}

.page-frame {
  width: min(100%, 900px);
  aspect-ratio: 8.5 / 11;
  background: #fff;
  box-shadow: 0 18px 44px rgba(31, 28, 24, 0.18);
}

#worksheetPreview {
  display: block;
  width: 100%;
  height: 100%;
}

@media (max-width: 700px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  h1 {
    max-width: none;
  }

  .preview-panel {
    padding: 16px;
  }
}

@media (max-width: 520px) {
  .controls-panel {
    padding: 20px;
  }

  .action-row {
    grid-template-columns: 1fr;
  }
}