/* 請求書アプリ v0 — 共通スタイル
   方針: PC操作に不慣れな年配者でも迷わない。文字は大きめ、ボタンは大きく、情報を詰め込みすぎない。
   UIライブラリは導入せず素のCSSで構成する。 */

:root {
  --color-bg: #f4f6f5;
  --color-surface: #ffffff;
  --color-text: #1f2a24;
  --color-muted: #5b6b62;
  --color-border: #d9e0dc;
  --color-primary: #1a7a4c;
  --color-primary-dark: #145c39;
  --color-primary-bg: #e8f5ee;
  --color-danger: #b3261e;
  --color-danger-bg: #fdecea;
  --radius: 12px;
  --max-width: 880px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  font-size: 17px;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-header__home {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  text-decoration: none;
}

.app-header__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0;
}

.app-header__user {
  margin-left: auto;
  color: var(--color-muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

.app-header__logout {
  font-size: 0.85rem;
  min-height: 36px;
  padding: 6px 12px;
  white-space: nowrap;
}

.app-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px 64px;
}

h1 {
  font-size: 1.6rem;
  margin: 0 0 8px;
}

h2 {
  font-size: 1.25rem;
  margin: 0 0 14px;
}

p.lead {
  color: var(--color-muted);
  margin: 0 0 24px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

/* ボタン */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 22px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  min-height: 52px;
  line-height: 1.2;
}

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

.btn-plain {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: var(--color-danger);
  min-height: 44px;
  font-size: 0.95rem;
  padding: 8px 16px;
}

.btn-block {
  width: 100%;
}

.btn-huge {
  font-size: 1.3rem;
  padding: 22px 28px;
  min-height: 76px;
}

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

/* フォーム */
label {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
}

.field {
  margin-bottom: 20px;
}

.field-hint {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-top: 6px;
}

input[type="text"],
input[type="date"],
input[type="number"],
input[type="tel"],
textarea,
select {
  width: 100%;
  font-size: 1.05rem;
  padding: 12px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: 8px;
  font-family: inherit;
  background: #fff;
  color: var(--color-text);
}

input:focus,
textarea:focus,
select:focus {
  outline: 3px solid var(--color-primary-bg);
  border-color: var(--color-primary);
}

textarea {
  resize: vertical;
  min-height: 100px;
}

/* 品目リスト */
.item-row {
  display: grid;
  grid-template-columns: 1fr 90px 130px 40px;
  gap: 10px;
  align-items: start;
  margin-bottom: 12px;
}

.item-row__amount-view {
  padding: 12px 4px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.item-row__remove {
  background: transparent;
  border: none;
  color: var(--color-danger);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 8px;
  min-height: 44px;
}

.item-col-label {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 4px;
}

/* 合計表示 */
.totals-box {
  background: var(--color-primary-bg);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-top: 8px;
}

.totals-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  font-size: 1.05rem;
}

.totals-row.total {
  font-size: 1.3rem;
  font-weight: 700;
  border-top: 1px solid #c3ddce;
  margin-top: 6px;
  padding-top: 10px;
}

/* リスト（ホーム最近の請求書・履歴） */
.invoice-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.invoice-list li {
  border-bottom: 1px solid var(--color-border);
}

.invoice-list li:last-child {
  border-bottom: none;
}

.invoice-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 16px 4px;
  text-decoration: none;
  color: var(--color-text);
}

.invoice-list a:hover {
  background: var(--color-primary-bg);
}

.invoice-list__client {
  font-weight: 700;
}

.invoice-list__meta {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.invoice-list__amount {
  font-weight: 700;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* 年→月ナビゲーション（履歴） */
.year-switcher {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin: 8px 0 28px;
}

.year-switcher__year {
  font-size: 1.6rem;
  font-weight: 700;
  min-width: 6em;
  text-align: center;
}

.year-switcher__arrow {
  font-size: 1.3rem;
  min-height: 48px;
  min-width: 48px;
  padding: 8px 14px;
}

.month-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.month-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 8px;
  text-decoration: none;
  color: var(--color-text);
  min-height: 92px;
}

.month-card:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
}

.month-card--empty {
  color: var(--color-muted);
}

.month-card__month {
  font-size: 1.15rem;
  font-weight: 700;
}

.month-card__count {
  font-size: 0.9rem;
  color: var(--color-primary-dark);
  font-weight: 700;
}

.month-card__count--muted {
  color: var(--color-muted);
  font-weight: 400;
}

.month-card__total {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.status-pill {
  display: inline-block;
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  border-radius: 999px;
  padding: 1px 8px;
  font-size: 0.8rem;
}

.empty-state {
  text-align: center;
  color: var(--color-muted);
  padding: 40px 20px;
}

.home-hero {
  text-align: center;
  padding: 20px 0 8px;
}

.home-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.home-links .card {
  flex: 1 1 220px;
  text-align: center;
  margin-bottom: 0;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 12px;
}

.banner-success {
  background: var(--color-primary-bg);
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary-dark);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 20px;
  font-weight: 700;
}

.banner-error {
  background: var(--color-danger-bg);
  border: 1.5px solid var(--color-danger);
  color: var(--color-danger);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 20px;
  font-weight: 700;
}

/* スマホ幅対応 */
@media (max-width: 560px) {
  html {
    font-size: 16px;
  }
  .item-row {
    grid-template-columns: 1fr;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 12px;
  }
  .item-row__amount-view {
    text-align: left;
    padding: 4px;
  }
  .item-row__remove {
    justify-self: end;
  }
  .home-links {
    flex-direction: column;
  }
  .app-main {
    padding: 16px 14px 48px;
  }
  .month-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  /* 狭い画面ではヘッダーが折り返して窮屈になるため、ユーザー名表示は省略する
     （ログアウトボタンとタイトルは残す）。 */
  .app-header__user {
    display: none;
  }
  .app-header__title {
    font-size: 0.95rem;
  }
}