:root {
  --vqeg-blue: #1f5d8e;
  --vqeg-blue-deep: #163e5b;
  --vqeg-sky: #eaf3f9;
  --vqeg-border: #c6d6e2;
  --vqeg-ink: #1d2730;
  --vqeg-muted: #566572;
  --vqeg-paper: #ffffff;
  --vqeg-bg: #f4f7f9;
  --shadow-soft: 0 18px 45px rgba(22, 62, 91, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", Times, serif;
  color: var(--vqeg-ink);
  background:
    linear-gradient(180deg, rgba(31, 93, 142, 0.08), transparent 280px),
    var(--vqeg-bg);
}

button,
input,
select,
textarea {
  font: inherit;
}

.page-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  margin-bottom: 28px;
  padding: 28px 30px;
  border: 1px solid var(--vqeg-border);
  background: linear-gradient(135deg, #fdfefe, #ecf5fb);
  box-shadow: var(--shadow-soft);
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vqeg-blue);
}

.hero h1,
.panel-header h2 {
  margin: 0;
  color: var(--vqeg-blue-deep);
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.05;
}

.hero-copy,
.panel-header p,
.status {
  margin: 0;
  color: var(--vqeg-muted);
}

.layout {
  display: grid;
  grid-template-columns: minmax(340px, 1.05fr) minmax(320px, 0.95fr);
  gap: 24px;
  align-items: start;
}

.panel {
  border: 1px solid var(--vqeg-border);
  background: var(--vqeg-paper);
  box-shadow: var(--shadow-soft);
}

.form-panel,
.preview-panel {
  padding: 24px;
}

.panel-header {
  display: grid;
  gap: 6px;
  margin-bottom: 18px;
}

.bibtex-import {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.publication-form,
.field-grid {
  display: grid;
  gap: 14px;
}

.field-grid-static {
  margin-bottom: 14px;
}

.field-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  display: grid;
  gap: 7px;
  font-size: 0.95rem;
  color: var(--vqeg-blue-deep);
}

input,
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--vqeg-border);
  background: #fff;
  color: var(--vqeg-ink);
  border-radius: 0;
}

input[type="checkbox"] {
  width: auto;
}

input:focus,
select:focus,
textarea:focus,
button:focus {
  outline: 2px solid rgba(31, 93, 142, 0.18);
  outline-offset: 2px;
}

.field-span-2 {
  grid-column: span 2;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: center;
}

.requirements-note,
.optional-toggle {
  margin-bottom: 18px;
  padding: 14px 16px;
  border: 1px solid var(--vqeg-border);
  background: #f8fbfd;
}

.optional-toggle {
  display: grid;
  gap: 10px;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.switch-track {
  position: relative;
  width: 52px;
  height: 30px;
  border: 1px solid var(--vqeg-border);
  background: #d8e5ee;
  transition: background-color 160ms ease;
}

.switch-track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  background: white;
  transition: transform 160ms ease;
}

.switch input:checked + .switch-track {
  background: var(--vqeg-blue);
}

.switch input:checked + .switch-track::after {
  transform: translateX(22px);
}

.switch-label {
  color: var(--vqeg-blue-deep);
}

.field-card {
  padding: 14px;
  border: 1px solid var(--vqeg-border);
  background: #fcfefe;
}

.field-card.field-required {
  border-left: 4px solid var(--vqeg-blue);
}

.field-card.field-optional {
  border-left: 4px solid #d3dde6;
}

.field-label-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
  justify-content: space-between;
}

.field-label-actions {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.field-badge {
  display: inline-block;
  padding: 2px 7px;
  border: 1px solid var(--vqeg-border);
  color: var(--vqeg-blue-deep);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.field-help {
  margin: 0;
  font-size: 0.86rem;
  color: var(--vqeg-muted);
}

.field-generate-button {
  padding: 4px 10px;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

button {
  padding: 11px 16px;
  border: 1px solid var(--vqeg-blue);
  background: var(--vqeg-blue);
  color: white;
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease;
}

button:hover {
  background: var(--vqeg-blue-deep);
  border-color: var(--vqeg-blue-deep);
}

.preview-surface {
  min-height: 360px;
  padding: 20px;
  border: 1px solid var(--vqeg-border);
  background:
    linear-gradient(180deg, rgba(234, 243, 249, 0.85), rgba(255, 255, 255, 0.96));
  overflow: auto;
}

.export-header {
  margin-top: 24px;
}

.html-output {
  margin-top: 12px;
  min-height: 340px;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.87rem;
  line-height: 1.45;
  background: #f9fbfc;
}

.validation-panel {
  margin-top: 14px;
  padding: 14px 16px;
  border: 1px solid var(--vqeg-border);
  background: #fbfdfe;
}

.validation-line,
.validation-ok,
.validation-error {
  margin: 0 0 10px;
  line-height: 1.5;
}

.validation-ok {
  color: #225c38;
}

.validation-error {
  color: #8a3b2a;
}

.validation-list {
  margin: 0;
  padding-left: 20px;
  color: #8a3b2a;
}

.landing-card {
  max-width: 760px;
  margin: 0 auto;
  padding: 0;
  color: var(--vqeg-ink);
}

.landing-card h3 {
  margin: 0 0 14px;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  line-height: 1.2;
  color: var(--vqeg-blue-deep);
}

.landing-meta {
  margin: 0 0 14px;
  font-size: 1rem;
  color: var(--vqeg-muted);
}

.citation-line,
.ieee-line {
  margin: 0 0 18px;
  line-height: 1.7;
}

.supplement-box {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--vqeg-border);
}

.supplement-box h4 {
  margin: 0 0 10px;
  color: var(--vqeg-blue-deep);
  font-size: 1.05rem;
}

.code-block {
  margin: 0;
  padding: 14px;
  border: 1px solid var(--vqeg-border);
  background: #f9fbfc;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.87rem;
  line-height: 1.45;
}

.metadata-table {
  width: 100%;
  margin: 18px 0 20px;
  border-collapse: collapse;
  border-top: 1px solid var(--vqeg-border);
}

.metadata-table th,
.metadata-table td {
  padding: 11px 0;
  border-bottom: 1px solid var(--vqeg-border);
  vertical-align: top;
}

.metadata-table th {
  width: 180px;
  padding-right: 18px;
  text-align: left;
  color: var(--vqeg-blue-deep);
  font-weight: 700;
}

.resource-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 18px 0;
}

.resource-link {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border: 1px solid var(--vqeg-blue);
  color: var(--vqeg-blue);
  text-decoration: none;
}

.resource-link:hover {
  background: var(--vqeg-sky);
}

.abstract-box {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--vqeg-border);
}

.abstract-box h4 {
  margin: 0 0 10px;
  color: var(--vqeg-blue-deep);
  font-size: 1.05rem;
}

.empty-preview {
  margin: 0;
  color: var(--vqeg-muted);
}

.missing-note {
  margin: 0 0 16px;
  padding: 12px 14px;
  border: 1px solid #e2c27b;
  background: #fff9ea;
  color: #6b5220;
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 20px, 1240px);
    padding-top: 20px;
  }

  .hero,
  .form-panel,
  .preview-panel {
    padding: 18px;
  }

  .field-grid {
    grid-template-columns: 1fr;
  }

  .field-span-2 {
    grid-column: span 1;
  }
}