:root {
  --bg-1: #f6efe3;
  --bg-2: #d9f0ea;
  --panel: #ffffff;
  --panel-muted: #f6f9f8;
  --ink: #1b2a32;
  --ink-soft: #4d626d;
  --line: #c8d9dd;
  --accent: #ff6b3d;
  --accent-strong: #cf4d26;
  --ok: #1f8f64;
  --warn: #b54c20;
  --error: #9f2121;
  --shadow: 0 14px 36px rgba(16, 37, 45, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Trebuchet MS", "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 15% 10%, #fff7d9 0%, transparent 35%),
    radial-gradient(circle at 85% 15%, #c7efdf 0%, transparent 30%),
    linear-gradient(160deg, var(--bg-1), var(--bg-2));
  position: relative;
}

.ambient {
  pointer-events: none;
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    -20deg,
    rgba(255, 255, 255, 0.2),
    rgba(255, 255, 255, 0.2) 14px,
    rgba(255, 255, 255, 0.1) 14px,
    rgba(255, 255, 255, 0.1) 28px
  );
  mix-blend-mode: soft-light;
}

.hero {
  position: relative;
  z-index: 1;
  padding: 30px 24px 12px;
  text-align: center;
}

.hero h1 {
  margin: 0;
  font-family: "Gill Sans", "Trebuchet MS", sans-serif;
  letter-spacing: 0.02em;
  font-size: clamp(1.8rem, 2.8vw, 2.5rem);
}

.hero p {
  margin: 0.6rem auto 0;
  max-width: 72ch;
  color: var(--ink-soft);
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.78rem;
  color: var(--accent-strong);
  font-weight: 700;
}

.layout {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 18px 48px;
  display: grid;
  gap: 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 18px;
}

.card h2 {
  margin: 0 0 12px;
  font-family: "Gill Sans", "Trebuchet MS", sans-serif;
  font-size: 1.2rem;
}

.card h3 {
  margin: 0;
  font-size: 1rem;
}

.muted {
  color: var(--ink-soft);
  margin: 6px 0 0;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.summary-chip {
  background: var(--panel-muted);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px 10px;
}

.summary-chip small {
  display: block;
  color: var(--ink-soft);
}

.summary-chip strong {
  display: block;
  margin-top: 4px;
  font-size: 1rem;
}

.file-picker {
  display: grid;
  gap: 6px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  background: var(--panel-muted);
  padding: 12px;
}

.file-picker span {
  font-weight: 700;
}

.split-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.pane {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-muted);
  padding: 12px;
  display: grid;
  gap: 10px;
}

.pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.mini-actions {
  display: inline-flex;
  gap: 6px;
}

button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 10px;
  padding: 8px 12px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s ease, background 0.18s ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
  background: #fff7f1;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.field {
  display: grid;
  gap: 6px;
}

.field > span {
  font-size: 0.84rem;
  color: var(--ink-soft);
  font-weight: 700;
}

.ref-config {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-muted);
  padding: 12px;
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.ref-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 10px;
}

.ref-field {
  margin: 0;
}

.ref-row button {
  height: 40px;
  white-space: nowrap;
}

.ref-guidance {
  margin: 0;
  font-size: 0.82rem;
}

.release-ref-status {
  margin: 0;
  font-size: 0.82rem;
  min-height: 1.2em;
}

.release-ref-status.status-ok {
  color: var(--ok);
}

.release-ref-status.status-error {
  color: var(--error);
}

.advanced-block {
  border: 1px dashed var(--line);
  border-radius: 10px;
  background: #fff;
  padding: 8px 10px;
}

.advanced-block > summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--ink-soft);
  list-style: none;
}

.advanced-block > summary::-webkit-details-marker {
  display: none;
}

.advanced-block > summary::before {
  content: "▶";
  display: inline-block;
  margin-right: 8px;
  transition: transform 0.15s ease;
}

.advanced-block[open] > summary::before {
  transform: rotate(90deg);
}

.advanced-block > :not(summary) {
  margin-top: 10px;
}

input[type="text"],
input[type="file"],
select,
textarea {
  width: 100%;
  border: 1px solid #b7ccd2;
  border-radius: 10px;
  padding: 8px 10px;
  color: var(--ink);
  font: inherit;
  background: #fff;
}

textarea {
  resize: vertical;
}

.check-field {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
}

.target-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
  max-height: 250px;
  overflow: auto;
}

.target-list li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 9px;
}

.target-label {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 8px 10px;
}

.target-meta {
  display: grid;
  gap: 2px;
}

.target-title {
  font-weight: 700;
}

.target-sub {
  color: var(--ink-soft);
  font-size: 0.83rem;
}

.light-grid {
  display: grid;
  gap: 10px;
}

.light-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-muted);
  padding: 12px;
  display: grid;
  gap: 10px;
}

.light-card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.light-badge {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-strong);
  font-weight: 700;
}

.light-grid-fields {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.light-grid-basic-fields {
  grid-template-columns: 1fr;
}

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

.duv-number-panel {
  border: 1px dashed var(--line);
  border-radius: 10px;
  background: #fff;
  padding: 10px;
}

.duv-note {
  margin: 2px 0 0;
  font-size: 0.82rem;
}

.is-hidden {
  display: none;
}

.placeholder {
  border: 1px dashed var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 14px;
  color: var(--ink-soft);
}

#validation-messages {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.message-box {
  border-radius: 10px;
  padding: 10px 12px;
  border: 1px solid;
}

.message-box.error {
  border-color: #e9b2b2;
  background: #fff4f4;
  color: var(--error);
}

.message-box.warn {
  border-color: #ecc6b1;
  background: #fff7f0;
  color: var(--warn);
}

.output-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.output-panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: #0e1f2a;
}

.output-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: #163444;
  color: #f0fbff;
}

.output-head h3 {
  margin: 0;
  font-size: 0.95rem;
}

.output-head button {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
  color: #f5ffff;
  padding: 6px 10px;
}

.output-head button:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.18);
}

pre {
  margin: 0;
  padding: 12px;
  overflow: auto;
  max-height: 380px;
}

code {
  font-family: "Consolas", "Courier New", monospace;
  color: #d2eff4;
  line-height: 1.45;
  font-size: 0.86rem;
}

@media (max-width: 980px) {
  .split-grid,
  .output-grid,
  .light-grid-fields {
    grid-template-columns: 1fr;
  }

  .ref-row {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .ref-row button {
    width: 100%;
  }

  .hero {
    text-align: left;
  }
}