:root {
  --color-primary: #1a3055;
  --color-accent: #0d6e85;
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-border: #e2e6ea;
  --color-border-focus: #0d6e85;
  --color-text-main: #1d2328;
  --color-text-muted: #6b7688;
  --color-text-inverse: #ffffff;
  --color-success: #1e7840;
  --color-warning: #a85c00;
  --color-danger: #c0392b;
  --font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Meiryo", system-ui, sans-serif;
  --radius-card: 8px;
  --radius-button: 4px;
  --radius-input: 4px;
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text-main);
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
}

a {
  color: var(--color-accent);
}

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner,
.site-footer,
.page {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header__inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  color: var(--color-primary);
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.nav a {
  color: var(--color-text-muted);
  font-size: 14px;
  text-decoration: none;
}

.page {
  padding: 32px 0;
}

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: 24px;
  align-items: start;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 24px;
}

.card + .card {
  margin-top: 20px;
}

h1,
h2,
h3 {
  margin: 0 0 16px;
  color: var(--color-primary);
  line-height: 1.35;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 20px;
}

p {
  margin: 0 0 16px;
}

.muted {
  color: var(--color-text-muted);
  font-size: 14px;
}

.notice {
  border-left: 4px solid var(--color-accent);
  background: #edf6f8;
  padding: 12px 16px;
  margin-bottom: 20px;
}

.warning {
  border-left-color: var(--color-warning);
  background: #fff5e8;
}

.success {
  border-left-color: var(--color-success);
  background: #eef8f1;
}

label {
  display: block;
  font-weight: 700;
  margin: 16px 0 6px;
}

input,
select,
button {
  font: inherit;
}

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}

fieldset:disabled {
  opacity: 0.62;
}

input[type="text"],
input[type="email"],
input[type="number"],
input[type="file"],
select {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-input);
  padding: 10px 12px;
  background: #fff;
}

input:focus,
select:focus {
  border-color: var(--color-border-focus);
  outline: 2px solid rgba(13, 110, 133, 0.14);
}

.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 0;
  border-radius: var(--radius-button);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: 9px 16px;
  text-decoration: none;
  cursor: pointer;
}

button:disabled,
fieldset:disabled button {
  cursor: not-allowed;
  opacity: 0.65;
}

.button.secondary {
  background: var(--color-accent);
}

button.secondary {
  background: var(--color-accent);
}

.button.ghost {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-primary);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.flow-card {
  max-width: 640px;
  margin: 0 auto;
}

.summary-list {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  margin: 20px 0 0;
  overflow: hidden;
}

.summary-list div {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 16px;
}

.summary-list div + div {
  border-top: 1px solid var(--color-border);
}

.summary-list dt {
  color: var(--color-text-muted);
  font-weight: 700;
}

.summary-list dd {
  margin: 0;
  min-width: 0;
}

.step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.step-list li {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-button);
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 700;
  min-height: 36px;
  padding: 6px 8px;
  text-align: center;
}

.step-list li.current {
  border-color: var(--color-accent);
  background: #edf6f8;
  color: var(--color-primary);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid var(--color-border);
  padding: 10px 8px;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--color-text-muted);
  font-size: 13px;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow-wrap: anywhere;
}

.code-box {
  display: inline-block;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: #f4f6f8;
  padding: 10px 14px;
  font-size: 24px;
  letter-spacing: 0;
}

.site-footer {
  padding: 24px 0 40px;
  color: var(--color-text-muted);
  font-size: 13px;
}

@media (max-width: 780px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .site-header__inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .summary-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .step-list {
    grid-template-columns: 1fr;
  }
}