:root {
  --bg: #f5efe6;
  --panel: rgba(255, 252, 248, 0.92);
  --panel-border: rgba(127, 108, 81, 0.18);
  --text: #2f2418;
  --muted: #74624f;
  --accent: #8d5a2f;
  --accent-strong: #6f431f;
  --danger-bg: #fff1ef;
  --danger-text: #912f2b;
  --notice-bg: #eef8f0;
  --notice-text: #2d6a38;
  --shadow: 0 18px 45px rgba(71, 44, 18, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(239, 209, 165, 0.55), transparent 28%),
    radial-gradient(circle at top right, rgba(173, 211, 169, 0.4), transparent 24%),
    linear-gradient(180deg, #fbf7f1 0%, var(--bg) 100%);
  color: var(--text);
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
}

.page-shell {
  width: min(1280px, calc(100% - 32px));
  margin: 32px auto 48px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 24px;
}

.page-header h1,
.panel h2 {
  margin: 0;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.setting-card,
.panel,
.flash {
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.setting-card {
  min-width: 144px;
  padding: 14px 18px;
  text-align: center;
}

.setting-card span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.setting-card strong {
  display: block;
  margin-top: 4px;
  font-size: 2rem;
}

.flash {
  margin-bottom: 20px;
  padding: 14px 18px;
}

.flash ul {
  margin: 8px 0 0;
  padding-left: 18px;
}

.flash-notice {
  background: var(--notice-bg);
  color: var(--notice-text);
}

.flash-alert {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.page-grid {
  display: grid;
  grid-template-columns: minmax(360px, 420px) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.panel {
  padding: 24px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

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

.report-form {
  margin-top: 16px;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label,
.field-label {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.field input,
.field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(115, 97, 73, 0.2);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--text);
  font-size: 1rem;
}

.field input:focus,
.field select:focus {
  outline: 2px solid rgba(141, 90, 47, 0.2);
  border-color: rgba(141, 90, 47, 0.5);
}

.usage-field {
  justify-content: end;
}

.usage-count {
  display: flex;
  align-items: center;
  min-height: 49px;
  padding: 12px 14px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(141, 90, 47, 0.12), rgba(239, 177, 132, 0.2));
  font-size: 1.4rem;
  font-weight: 700;
}

.actions {
  margin-top: 20px;
}

.button-primary {
  width: 100%;
  border: 0;
  border-radius: 14px;
  padding: 14px 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.button-primary:hover {
  filter: brightness(1.05);
}

.serial-grid-wrapper {
  overflow: auto;
  max-height: 70vh;
  border-radius: 16px;
  border: 1px solid rgba(115, 97, 73, 0.12);
  background: rgba(255, 255, 255, 0.6);
}

.serial-grid {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.serial-grid td {
  min-width: 70px;
  padding: 12px 8px;
  border: 1px solid rgba(115, 97, 73, 0.12);
  background: linear-gradient(135deg, var(--cell-color), rgba(255, 255, 255, 0.9));
  text-align: center;
  font-size: 0.98rem;
}

.serial-grid-empty {
  background: transparent;
}

.legend {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
}

.legend-item p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.legend-swatch {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: var(--swatch-color);
  flex-shrink: 0;
}

@media (max-width: 960px) {
  .page-grid {
    grid-template-columns: 1fr;
  }

  .page-header {
    align-items: start;
    flex-direction: column;
  }

  .panel {
    padding: 20px;
  }
}