/* ========================================================================================================
   1. Design System / Variables
   - 命名規則の統一 (--c-main, --c-bg-base, --c-border-default 等)
   - ライト / ダークモード変数の補完・一貫性維持
======================================================================================================== */
:root {
  /* == Brand / Accent ======================== */
  --color-accent: #1e88e5;
  --color-accent-soft: #e3f2fd;
  --color-link: #1565c0;

  /* == Text ======================== */
  --c-main: #00;
  --c-accent: #fff;
  --c-muted: #666;

  /* == Surfaces ======================== */
  --c-bg-base: #FBFDFE;   /* ベース背景 */
  --c-bg-main: #92bedb;   /* FAQボタン等 */
  --c-bg-accent: #001559; /* 濃いアクセント */
  --c-bg-surface: #fff;/* フォーム・カード背景 */

  --c-main-gradient: linear-gradient(120deg, var(--c-bg-accent), #5F99CF);  /* header footer btn-next */
  --c-sub-gradient: linear-gradient(120deg, #ebdbf3, #a0a0a0);

  --c-bg-main-hover: #E0FFFF;

  /* == Border ======================== */
  /* --c-border-default: #4b4b4b; */
  --c-border-default: #666;
  --c-border-subtle: #dbe5ec;

  /* == Shadow ======================== */
  --shadow-sm: 0 2px 6px rgba(10, 40, 80, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 40, 80, 0.12);
}


/* == Dark Mode ================================= */
@media (prefers-color-scheme: dark) {
  :root {
    /* == Brand / Accent ======================== */
    --color-accent: #6cb6ff;
    --color-accent-soft: #163047;
    --color-link: #8ab4ff;

    /* == Text ======================== */
    --c-main: #eeffff;
    --c-accent: #000000;
    --c-muted: #a0a0a0;

    /* == Surfaces ======================== */
    --c-bg-base: #111111;
    --c-bg-main: #1b2b29;
    --c-bg-accent: #0b0f11;
    --c-bg-surface: #1e262c;

    --c-main-gradient: linear-gradient(120deg, #0b0f11, #244b63);

    --c-bg-main-hover: #24413d;

    /* == Border ======================== */
    --c-border-default: #8ae3c5;
    --c-border-subtle: #2a3a46;

    /* == Shadow ======================== */
    --shadow-sm: 0 2px 6px rgba(255, 255, 255, 0.08);
    --shadow-md: 0 8px 24px rgba(255, 255, 255, 0.14);
  }
}







/* ========================================================================================================
   2. Common / Page Layout & Reset
======================================================================================================== */

.page { max-width: 1200px; margin: 2.4rem auto; padding: 0 1.2rem; }

@media (min-width: 768px) {
  .page { padding: 0 2rem; }
}

/* Base / Reset + Typography */
html { font-size: 62.5%; background: var(--c-bg-base); }

body {
  margin: 0; font-family: Arial, sans-serif; font-size: 1.6rem;
  line-height: 1.6; background: var(--c-bg-base); color: var(--c-main);
}

/* Headings */
h1, h2, h3 { margin: 0.6rem 0; line-height: 1.3; }

h1 { text-align: center; color: var(--c-bg-accent); }
h2 { padding-left: 0.6rem; color: var(--c-bg-accent); border-left: 0.4rem solid var(--c-bg-accent); }

.main_lead{margin-bottom: 3rem;}
.text_center { text-align: center; border-left: none; padding-left: 0; }

#confirm h2,
#confirm h3 { text-align: center; margin-left: auto; margin-right: auto; }

#home h2,
#contact h2,
#donation h2,
#maintenance h2 { padding-left: 0; border-left: none; }

#article{
  margin: 0 auto;     /* 左右中央寄せの核心 */
  padding: 20px 0;    /* 上下の余白 */
}

/* 中央寄せ見出し (◇ 装飾) */
h2.h2-center { text-align: center; border-left: none; padding-left: 0; }
h2.h2-center::before { content: '◇'; margin-right: 0.7rem; }
h2.h2-center::after { content: '◇'; margin-left: 0.7rem; }

/* Lists & Links */
ul, ol { margin: 0; padding: 0; list-style: none; }

a { color: var(--color-link); text-decoration: underline; font-weight: bold; font-style: italic; }

.nav a { color: inherit; text-decoration: none; font-weight: normal; font-style: normal; }

/* Media & Form Base */
img { display: block; max-width: 100%; height: auto; }

input, textarea, button, select { font: inherit; }

.hp-wrap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* Cursor (タイポ修正: btton -> button) */
@media (hover: hover) {
  button, a, summary, [role="button"], input[type="submit"], input[type="button"] {
    cursor: pointer;
  }
}

/* ========================================================================================================
   Header & Navigation
======================================================================================================== */

.header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  padding: 1.2rem 0;
  background: var(--c-main-gradient);
  color: var(--c-accent);
}

.header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.2rem;
}

.header__logo { text-align: center; }

.header__title { display: block; font-size: 2.4rem; font-weight: bold; }

.header__subtitle {
  display: block; font-size: 1.2rem;
  letter-spacing: 0.1em; opacity: 0.7;
}

@media (min-width: 768px) {
  .header { gap: 1.6rem; }
}

/* Navigation */
.nav__toggle { display: none; }

.nav__button { display: block; font-size: 2rem; cursor: pointer; }

.nav__list {
  display: none; flex-direction: column; gap: 1rem;
  text-align: center; padding: 1rem 0;
}

.nav__toggle:checked + .nav__button + .nav__list {
  display: flex;
}

.nav__link { display: block; padding: 0.8rem 1rem; }

@media (min-width: 768px) {
  .nav__button { display: none; }

  .nav__list {
    display: flex; flex-direction: row; justify-content: center;
    gap: 2rem; padding: 0;
  }

  .nav__link {
    transition: opacity 0.3s, color 0.3s; opacity: 0.7;
  }

  /* 未定義変数修正: var(--color-main) -> var(--color-accent) */
  .nav__link:hover { opacity: 1; color: var(--color-accent); font-weight: bold; }
}

/* ========================================================================================================
   Footer
======================================================================================================== */

.footer {
  padding: 2rem 0; text-align: center; border-top: 1px solid var(--c-border-default);
  margin-top: 3rem; background: var(--c-main-gradient); color: var(--c-accent);
}

.footer__copy { font-size: 1.4rem; opacity: 0.8; }

/* ========================================================================================================
   3. Main Content & Interactive Components
======================================================================================================== */

.article { display: flex; flex-direction: column;
  gap: 1.6rem; align-items: center;
}

#home article{
    margin-bottom: 3rem;
}

.article__media {
  max-width: 320px;
  height: 200px;
  overflow: hidden;
  border-radius: 0.8rem;
  flex-shrink: 0;
}

/* .article__media img { width: 100%; height: 100%; object-fit: cover; } */



#article img{
  display: block;
  max-width: 100%;
  max-height: 30rem;     /* 🔥 お好みの高さの上限値（例: 300px, 20rem など） */
  width: auto !important; /* heightに合わせて幅を自動追従させる */
  height: auto;
  object-fit: contain;
  margin: 0 auto;        /* 中央寄せ */
}

.article__body { max-width: 600px; text-align: left; }

@media (min-width: 768px) {
  .article { flex-direction: row; align-items: flex-start; gap: 2rem; }
  .article__media { height: 220px; }
  .article__body { flex: 1; }
}

/* Accordion Component */
.accordion {
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
  margin-bottom: 0.75rem;
}

.accordion__control {
  display: none;
}

.accordion__summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  cursor: pointer;
  background-color: var(--c-bg-main);
  color: var(--c-); /* 未定義修正: var(--color-text-primary) -> var(--c-main) */
  font-weight: 500;
  border-bottom: 1px solid var(--c-border-default); /* 未定義修正: var(--border-default) */
  transition: background-color 0.2s;
  margin-top: 0.75rem;
  border-radius: 3px;
}

.accordion__summary:hover {
  background-color: var(--c-bg-main-hover);
}

.accordion__summary::after {
  content: "+";
  font-weight: bold;
  font-size: 1.2rem;
  transition: transform 0.2s;
}

.accordion__control:checked + .accordion__summary::after {
  content: "−";
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  padding: 0 1rem;
  border-left: 5px solid var(--c-bg-main);
  font-size: 1.6rem;
  line-height: 1.6;
  transition: max-height 0.2s ease, padding 0.2s ease;
}

.accordion__control:checked + .accordion__summary + .accordion__content {
  max-height: 1000px; padding: 1rem;
}

.accordion__content p { margin: 0; }

/* ========================================================================================================
   Contact Form
   - ハードコードされていた #fff や境界線色を CSS 変数に置換してダークモードに対応
======================================================================================================== */
#donation p,
#contact p {
  max-width: 72rem;       /* フォームの幅に合わせて調整してください */
  margin: 0rem auto 2rem;  /* 上 左右(自動で中央寄せ) 下 */
  line-height: 1.5;
}

.contact-form {
  max-width: 72rem;
  margin: 4rem auto;
  padding: 3.2rem;
  background: var(--c-bg-surface);
  border: 1px solid var(--c-border-subtle);
  border-radius: 1.6rem;
  box-shadow: var(--shadow-sm);
}

.contact-form .form-group { margin-bottom: 2.4rem; }

.contact-form label {
  display: block;
  margin-bottom: 0.8rem;
  font-weight: bold;
  color: var(--c-main);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 1.2rem;
  font-size: 1.6rem;
  border: 1px solid var(--c-border-subtle);
  border-radius: 0.8rem;
  background: var(--c-bg-surface);
  color: var(--c-main);
  box-sizing: border-box;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.contact-form textarea { resize: vertical; min-height: 16rem; }

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 0.3rem rgba(30, 136, 229, 0.15);
}

@media (min-width: 768px) {
  .contact-form .is-inline {
    display: grid;
    grid-template-columns: 18rem 1fr;
    align-items: start;
    gap: 2rem;
  }

  .contact-form .is-inline label {
    margin-top: 1.2rem;
    margin-bottom: 0;
  }
}

/* ========================================================================================================
   News Section
======================================================================================================== */

.news-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.news-article {
  display: flex;
  gap: 2rem;
  align-items: center;
  border-bottom: 1px solid var(--c-border-default);
  padding-bottom: 2rem;
  flex-wrap: wrap;
}

.thumbnail-wrapper {
  width: 120px;
  height: 80px;
  position: relative;
  overflow: hidden;
  border-radius: 6px;
  flex-shrink: 0;
  background-color: var(--c-bg-main-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--c-border-default);
}

.thumbnail-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.placeholder-box {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--c-main-gradient);
  color: var(--c-accent);
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.2rem;
  z-index: 0;
  text-align: center;
  padding: 4px;
}

.news-detail {
  flex: 1;
  min-width: 250px;
}

.news-meta {
  font-size: 1.2rem;
  color: var(--c-muted);
  opacity: 0.85;
}

.news-heading {
  margin: 0.5rem 0 0 0;
  font-size: 1.5rem;
  line-height: 1.4;
  font-weight: 600;
}

.news-link {
  text-decoration: none;
  color: var(--c-main);
  transition: color 0.2s, opacity 0.2s;
}

.news-link:hover {
  color: var(--color-link);
  opacity: 0.85;
}

.back-link {
  text-decoration: none;
  color: var(--color-link);
  font-weight: 500;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.error-msg {
  color: #ef4444;
  font-weight: 500;
}

.empty-msg {
  color: var(--c-main);
  opacity: 0.8;
  padding: 1.5rem 0;
}

/* ========================================================================================================
   4. Landing Page (LP) & Buttons
   - アクションボタン (.btn-next, .btn-back, .btn-submit) の集約統合
   - ショップボタン (.btn-shop, .btn-base, .btn-mercari, .btn-yahoo) の二重定義競合を削除統合
======================================================================================================== */

.lp-page {
  background-color: var(--c-bg-base); /* 未定義修正: var(--surface-page) */
  color: var(--c-main);        /* 未定義修正: var(--color-text-primary) */
  font-family: sans-serif;
  padding: 2rem;
}
.lp-sub-title{
  font-size: 2.6rem; /* お好みの大きさに調整（例: 20px相当） */
  font-weight: bold;   /* 太字にする場合 */
  color: var(--c-muted);
  text-align: center;
}
.lp-visual { margin-bottom: 1rem; }
.lp-block { margin-bottom: 8rem; }

.lp-image {
  width: 100%;
  height: auto;
  display: block;
}

.lp-text {
  font-size: 0.9rem;
  color: var(--c-muted); /* 未定義修正: var(--color-text-secondary) */
  text-align: center;
  margin-top: 0.5rem;
}

.note {
  padding: 1rem;
  background-color: var(--c-bg-main-hover);
  border-left: 4px solid var(--color-accent-soft);
  margin: 1rem 0;
  font-size: 1.4rem;
}

/* Base Action Buttons */
.btn-next,
.btn-back,
.btn-submit {
  display: block;
  width: fit-content;
  padding: 1.2rem 3.2rem;
  border-radius: 999px;
  color: #ffffff;
  font-weight: bold;
  text-decoration: none;
  box-shadow: var(--shadow-md);
  transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
  border: none;
  cursor: pointer;
}

.btn-next,
.btn-submit {
  grid-column: 2;
  justify-self: center;
  background: var(--c-main-gradient);
}

.btn-back {
  justify-self: start;
  background: var(--c-sub-gradient);
  color: #000000;
}

#maintenance .btn-back{ justify-self: center; margin-top: 5rem; }

.btn-next:hover,
.btn-back:hover,
.btn-submit:hover {
  transform: translateY(-3px);
  filter: brightness(1.12);
  box-shadow: 0 12px 28px rgba(10, 40, 80, 0.22);
}

.form-buttons {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  margin-top: 3rem;
}

/* Shop Button Group & Variants (重複と色の競合を解消) */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 15px auto 0;
  width: 100%;
}

.btn-shop {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  min-width: 120px;
  border-radius: 6px;
  color: #ffffff !important;
  font-weight: bold;
  font-size: 14px;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.2s;
  box-sizing: border-box;
  border: none;
}

.btn-shop:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

/* Shop Colors (単一の統一クラス定義) */
.btn-shop.btn-base,
.btn-base {
  background: #00a074 !important;
  color: #ffffff !important;
}

.btn-shop.btn-mercari,
.btn-mercari {
  background: #ff3b30 !important;
  color: #ffffff !important;
}

.btn-shop.btn-yahoo,
.btn-yahoo {
  background: #ff0050 !important;
  color: #ffffff !important;
}


/* 準備中ページ */
.maintenance-inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 2rem;
    text-align: center;
}

.maintenance-inner p {
    width: fit-content;
    margin: 0 auto;
}

.maintenance-image {
    display: block;
    width: 18rem;
    max-width: 60%;
    height: auto;
    margin: 0 auto 3rem;
}