/* ============================================================
   経営tools 共通スタイル
   - 外部フォント・フレームワーク不使用（OS標準の日本語フォント）
   - 清潔感・信頼感・数字の読みやすさを優先
   ============================================================ */

:root {
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #22303c;
  --color-muted: #62707d;
  --color-primary: #1f6fb2;
  --color-primary-dark: #185a91;
  --color-accent-bg: #edf4fb;
  --color-border: #d7dee5;
  --color-error: #c73a45;
  --color-success: #1e7e4d;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI",
    "Yu Gothic", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

[hidden] {
  display: none !important;
}

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

:focus-visible {
  outline: 3px solid rgba(31, 111, 178, 0.45);
  outline-offset: 2px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.container.narrow {
  max-width: 720px;
}

/* ---------- ヘッダー ---------- */

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

.site-logo {
  display: inline-block;
  padding: 14px 0;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

/* ---------- トップページ ---------- */

.hero {
  padding: 56px 0 36px;
  text-align: center;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 4.5vw, 2.3rem);
  line-height: 1.4;
}

.hero-lead {
  margin: 0;
  color: var(--color-muted);
}

.tools {
  padding: 8px 0 64px;
}

.tools h2 {
  margin: 0 0 20px;
  text-align: center;
  font-size: 1.3rem;
}

.tool-card {
  max-width: 560px;
  margin: 0 auto;
  padding: 28px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(34, 48, 60, 0.06);
}

.tool-card h3 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  line-height: 1.5;
}

.tool-card p {
  margin: 0 0 20px;
  font-size: 0.95rem;
}

.tool-note {
  margin: 14px 0 0 !important;
  font-size: 0.85rem;
  color: var(--color-muted);
  text-align: center;
}

/* ---------- ボタン ---------- */

.btn {
  display: inline-block;
  min-height: 48px;
  padding: 12px 28px;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-accent-bg);
}

.btn-block {
  display: block;
  width: 100%;
}

/* ---------- ツールページ共通 ---------- */

.page-title {
  margin: 32px 0 12px;
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  line-height: 1.4;
}

.page-lead {
  margin: 0 0 20px;
  color: var(--color-muted);
}

.note-box {
  margin: 0 0 28px;
  padding: 14px 16px;
  background: var(--color-accent-bg);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 8px 8px 0;
  font-size: 0.95rem;
}

.note-box p {
  margin: 0;
}

.panel {
  padding: 28px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

/* ---------- フォーム ---------- */

.field {
  margin-bottom: 22px;
}

.field label {
  display: block;
  margin-bottom: 4px;
  font-weight: 700;
}

.badge {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  vertical-align: middle;
}

.badge-required {
  background: var(--color-error);
  color: #fff;
}

.badge-optional {
  background: #e7ebf0;
  color: var(--color-muted);
}

.field-desc {
  margin: 0 0 6px;
  font-size: 0.85rem;
  color: var(--color-muted);
}

input[type="number"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-text);
  font-family: inherit;
  font-size: 16px;
}

input[type="number"]:focus {
  border-color: var(--color-primary);
  outline: 2px solid rgba(31, 111, 178, 0.35);
  outline-offset: 1px;
}

input[type="number"].input-error {
  border-color: var(--color-error);
}

/* 数値入力のスピンボタンを非表示（金額入力では不要のため） */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"] {
  -moz-appearance: textfield;
}

.field-aid {
  margin: 6px 0 0;
  min-height: 1.2em;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.field-error {
  margin: 6px 0 0;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-error);
}

/* ---------- 粗利益率の補助機能 ---------- */

.margin-helper {
  margin-top: 10px;
  background: var(--color-accent-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.margin-helper summary {
  padding: 12px 14px;
  color: var(--color-primary);
  font-weight: 700;
  cursor: pointer;
}

.margin-helper-body {
  padding: 4px 14px 16px;
}

.margin-helper-body .field {
  margin-bottom: 14px;
}

.helper-result {
  margin: 10px 0 0;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-success);
}

.privacy-note {
  margin: 24px 0 16px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* ---------- 結果表示 ---------- */

.result {
  margin-top: 32px;
  padding: 28px 24px;
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: 12px;
}

.result-kicker {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 14px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.result-hero-label {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.result-hero {
  margin: 4px 0 12px;
  font-size: 1.1rem;
}

.result-hero strong {
  font-size: clamp(2rem, 8vw, 2.75rem);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.3;
}

.result-lead {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.result-block {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.result-block h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.result-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--color-border);
}

.result-row-label {
  flex: 1 1 auto;
}

.result-row-value {
  flex: 0 0 auto;
  margin-left: auto;
  font-weight: 700;
  white-space: nowrap;
}

.result-row-total .result-row-label {
  font-weight: 700;
}

.result-row-total .result-row-value {
  color: var(--color-primary);
}

.result-note {
  margin: 10px 0 0;
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* ---------- 説明・フッター ---------- */

.explain {
  margin-top: 40px;
}

.explain h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.explain p {
  margin: 0 0 14px;
  font-size: 0.95rem;
}

.site-footer {
  margin-top: 56px;
  padding: 28px 0 40px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.disclaimer {
  margin: 0 0 12px;
  font-size: 0.8rem;
  color: var(--color-muted);
}

.copyright {
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* ---------- スマートフォン ---------- */

@media (max-width: 600px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero {
    padding: 40px 0 24px;
  }

  .panel,
  .result {
    padding: 20px 16px;
  }

  .tool-card {
    padding: 22px 18px;
  }
}