:root {
  --ink: #0b2742;
  --muted: #5d6b78;
  --line: #cbd8e4;
  --panel: #f5f8fb;
  --accent: #0b65b9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Segoe UI, Arial, sans-serif;
  color: var(--ink);
  background: #eef3f7;
}

header {
  padding: 18px 24px;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

h1 {
  margin: 0 0 4px;
  font-size: 22px;
}

p {
  margin: 0;
  color: var(--muted);
}

main {
  padding: 18px 24px 28px;
}

.toolbar {
  display: grid;
  grid-template-columns: 220px minmax(260px, 1fr) 160px 210px;
  gap: 12px;
  align-items: end;
  background: #fff;
  border: 1px solid var(--line);
  padding: 14px;
}

label {
  display: grid;
  gap: 5px;
  font-size: 13px;
  font-weight: 700;
}

select,
input[type="file"] {
  min-height: 36px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 7px;
}

button {
  min-height: 36px;
  border: 1px solid #064b89;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  border-color: #a9b7c3;
  background: #b8c4cf;
  cursor: not-allowed;
}

.notice,
.report,
.preview-grid article,
.settings-panel {
  background: #fff;
  border: 1px solid var(--line);
}

.notice {
  margin-top: 12px;
  padding: 10px 12px;
}

.settings-panel {
  margin-top: 12px;
  padding: 0;
}

.settings-panel summary {
  cursor: pointer;
  padding: 12px 14px;
  font-weight: 800;
  background: #dde7f0;
  border-bottom: 1px solid var(--line);
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(190px, 1fr));
  gap: 12px;
  padding: 14px;
}

fieldset {
  border: 1px solid var(--line);
  padding: 12px;
  background: #f9fbfd;
}

legend {
  font-weight: 800;
  color: #003b6f;
}

fieldset label {
  margin-bottom: 8px;
}

fieldset input,
fieldset select {
  width: 100%;
  min-height: 32px;
  border: 1px solid var(--line);
  padding: 5px;
}

fieldset .check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

fieldset .check input {
  width: auto;
  min-height: auto;
}

.report {
  margin-top: 12px;
  padding: 12px;
}

.report h2,
.preview-grid h2 {
  margin: 0 0 10px;
  font-size: 16px;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  font-family: Consolas, monospace;
  font-size: 13px;
  color: #111;
  max-height: 260px;
  overflow: auto;
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}

.preview-grid article {
  padding: 12px;
  min-width: 0;
}

.preview {
  height: 620px;
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 18px;
}

.page {
  max-width: 760px;
  min-height: 900px;
  margin: 0 auto;
  padding: 54px;
  background: #fff;
  box-shadow: 0 1px 7px rgba(20, 45, 70, .18);
  font-family: "Times New Roman", serif;
  color: #111;
}

.page p {
  color: #111;
  margin: 0;
  line-height: 1.5;
}

@media (max-width: 980px) {
  .toolbar,
  .preview-grid,
  .settings-grid {
    grid-template-columns: 1fr;
  }
}