/* base.css */

/* 全体レイアウト */
body {
    font-family: "Helvetica Neue", Arial, "Hiragino Sans", "Noto Sans JP", sans-serif;
    padding: 0;
    color: #333;
    margin: 0;
}

/* wrapper が全体を包む */
.wrapper {
    max-width: 900px;
    margin: 0 auto;
}

/* main は幅を固定しない（← これが重要） */
main {
    padding: 100px 0 0 0;
}

/* タイトル */
h1 {
    text-align: center;
    color: #005BAC;
    margin-bottom: 30px;
    font-family: "Helvetica Neue", Arial, "Hiragino Sans", "Noto Sans JP", sans-serif;
    font-weight: 600;
    font-size: 2.4rem;
    letter-spacing: 1px;
}

.br-sp {
  display: none;
}

/* フォーム全体 */
form {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
}

/* 各項目 */
.form-group {
    margin-bottom: 20px;
}

label {
    font-weight: 600;
    display: block;
    margin-bottom: 6px;
    color: #005BAC;
}

/* 入力系 */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
select,
textarea {
    width: 95%;
    padding: 12px;
    border: 1px solid #cfd8e3;
    border-radius: 8px;
    font-size: 16px;
    background: #fff;
    transition: border-color .2s;
}

input:focus,
select:focus,
textarea:focus {
    border-color: #0073CF;
    outline: none;
}

/* =========================
   RSVP 全ページ共通ボタン
========================= */

button[type="submit"],
#add-plusone,
form button {
    width: 100%;
    padding: clamp(10px, 2.5vw, 16px);
    font-size: clamp(10px, 5vw, 18px);
    background: #005BAC;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 20px;
    transition: background .2s;
}

button:hover {
    background: #0073CF;
}

/* =========================
   HEADER（白背景）
========================= */
.header , .headerInfo{
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 70px;
  background: #ffffffcc;
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  border-bottom: 1px solid #e5e5e5;
}

/* ロゴ（中央固定） */
.header-logo {
  height: 60px;
  left: 50%;
  transform: translateX(-50%);
}

/* MENU ボタン */
.menu-btn {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  background: #005BAC;
  border: none;
  cursor: pointer;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  height: 70px;
  width: 70px;
  justify-content: center;
}

.menu-btn .bar {
  width: 24px;
  height: 3px;
  background: #fff;
  border-radius: 2px;
}

.menu-btn .menu-text {
  color: #fff;
  font-size: 12px;
  margin-top: 2px;
}

/* NAV */
.nav {
  position: absolute;
  top: 70px;
  right: 16px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  padding: 12px 0;
  min-width: 180px;
  display: none;
  z-index: 2000;
}

.nav.open {
  display: block;
}

.nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav a:link,
.nav a:visited {
  color: #333;
  text-decoration: none;
  display: block;
  padding: 10px 20px;
}

.nav a:hover,
.info-toggle:hover {
  background: #f0f6ff;
}

/* INFO */
.info-toggle {
  background: none;
  border: none;
  padding: 10px 20px;
  color: #333;
  font-size: 16px;
  cursor: pointer;
  width: 100%;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.info-toggle .arrow {
  font-size: 12px;
  margin-left: 6px;
  transition: transform 0.2s ease;
}

.info-toggle.open .arrow {
  transform: rotate(180deg);
}

.info-sub {
  display: none;
  padding-left: 20px;
  flex-direction: column;
  gap: 8px;
}

.info-sub.open {
  display: flex;
}

/* FOOTER */
footer {
  text-align: center;
  color: #777;
  border-top: 1px solid #e5e5e5;
  white-space: normal;
  word-break: break-word;
}
/* 画面いっぱいに main を広げる */
.wrapper main {
    min-height: calc(100vh - 120px - 80px);
}
/* =========================
   メディアクエリ
========================= */

/* PC（900px以上） */
@media (min-width: 900px) {
  footer {
    font-size: 12px;
    padding: 15px 0;
    margin-top: 20px;
  }

  .wrapper {
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  }
  
  .header, .headerInfo{
    max-width: 900px;
  }
  
}

/* タブレット（680〜899px） */
@media (min-width: 680px) and (max-width: 899px) {
  footer {
    font-size: 12px;
    padding: 15px 0;
    margin-top: 20px;
  }

  .wrapper {
    width: 100%;
    box-shadow: none;
  }
  
  .header, .headerInfo{
    max-width: 100%;
  }
}

/* スマホ（〜679px） */
@media (max-width: 679px) {
  footer {
    font-size: clamp(4px, 4vw, 12px);
    padding: 15px 0;
    margin-top: 20px;
  }

  .wrapper {
    box-shadow: none;
  }

  .header, .headerInfo{
    max-width: 100%;
  }
  h1 {
      font-size: clamp(20px, 2.85vw, 28px);
  }
  
  .br-sp {
     display: block;
   }


}


.error-btn {
    display: inline-block;
    background: #005BAC;
    color: #fff;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    margin-top: 30px;
    transition: background .2s;
}

.error-btn:hover {
    background: #0073CF;
}