/* ============================================================
   大人のワンダーフォーゲル部 — メインスタイルシート
   ============================================================ */

/* ---------- CSS 変数 ---------- */
:root {
  --green:        #2E7D32;
  --green-light:  #4CAF50;
  --green-pale:   #E8F5E9;
  --orange:       #F57C00;
  --orange-light: #FFB300;
  --orange-pale:  #FFF8E1;
  --sky:          #29B6F6;
  --sky-dark:     #0277BD;
  --white:        #FFFFFF;
  --gray-100:     #F8F9FA;
  --gray-200:     #EEEEEE;
  --gray-500:     #9E9E9E;
  --text:         #212121;
  --text-light:   #555555;
  --shadow-sm:    0 2px 8px rgba(0,0,0,.08);
  --shadow-md:    0 6px 20px rgba(0,0,0,.12);
  --shadow-lg:    0 12px 40px rgba(0,0,0,.16);
  --radius-sm:    8px;
  --radius-md:    16px;
  --radius-lg:    24px;
  --radius-full:  9999px;
  --transition:   0.3s ease;
  --max-w:        1160px;
}

/* ---------- リセット & ベース ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a  { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---------- ユーティリティ ---------- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--green);
  background: var(--green-pale);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-desc {
  color: var(--text-light);
  font-size: 15px;
  max-width: 560px;
  margin: 0 auto;
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 700;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--orange);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(245,124,0,.35);
}
.btn--primary:hover { background: #E65100; }

.btn--outline {
  border: 2px solid var(--white);
  color: var(--white);
  background: transparent;
}
.btn--outline:hover { background: rgba(255,255,255,.15); }

.btn--full { width: 100%; }

/* ---------- HEADER ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-icon { font-size: 28px; line-height: 1; }
.logo-text  { display: flex; flex-direction: column; }
.logo-main  { font-size: 14px; font-weight: 900; color: var(--green); line-height: 1.2; }
.logo-sub   { font-size: 10px; font-weight: 500; color: var(--gray-500); letter-spacing: .05em; }

.nav__list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__link {
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  transition: background var(--transition), color var(--transition);
  position: relative;
}
.nav__link:not(.nav__link--cta)::after {
  content: '';
  position: absolute;
  bottom: 5px;
  left: 14px; right: 14px;
  height: 2px;
  background: var(--green);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .25s ease;
}
.nav__link:not(.nav__link--cta):hover::after { transform: scaleX(1); }
.nav__link:hover { background: var(--gray-100); color: var(--green); }
.nav__link--cta {
  background: var(--orange);
  color: var(--white) !important;
  font-weight: 700;
  box-shadow: 0 3px 10px rgba(245,124,0,.3);
}
.nav__link--cta:hover { background: #E65100; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(160deg, #1B5E20 0%, #2E7D32 35%, #388E3C 60%, #1565C0 100%);
  overflow: hidden;
  padding-top: 68px;
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero__mountain {
  position: absolute;
  bottom: 60px;
  left: 0; right: 0;
  width: 100%;
  height: auto;
  opacity: .6;
}

.hero__content {
  position: relative;
  z-index: 2;
  color: var(--white);
  padding-top: 40px;
  padding-bottom: 80px;
}

.hero__tag {
  display: inline-block;
  background: rgba(255,255,255,.2);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.3);
  border-radius: var(--radius-full);
  padding: 6px 18px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  text-shadow: 0 2px 12px rgba(0,0,0,.2);
}
.hero__title span { color: var(--orange-light); }

.hero__desc {
  font-size: clamp(15px, 2vw, 18px);
  opacity: .9;
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 56px;
}

.hero__stats {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat__num {
  display: block;
  font-family: 'Montserrat', sans-serif;
  font-size: 36px;
  font-weight: 900;
  line-height: 1;
  color: var(--orange-light);
}
.stat__num small { font-size: 18px; }
.stat__label { font-size: 12px; opacity: .85; }
.stat__divider {
  width: 1px;
  height: 48px;
  background: rgba(255,255,255,.3);
}

.hero__wave {
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  z-index: 3;
  line-height: 0;
}
.hero__wave svg { width: 100%; height: 80px; }

/* ---------- ABOUT ---------- */
.about {
  background: var(--white);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about__img-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

/* Mountain scene illustration */
.mountain-scene {
  position: relative;
  width: 100%;
  padding-top: 75%;
  overflow: hidden;
  border-radius: var(--radius-lg);
}
.ms__sky {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, #87CEEB 0%, #E0F4FF 60%, #FFF9C4 100%);
}
.ms__sun {
  position: absolute; top: 8%; right: 15%;
  font-size: clamp(28px, 5vw, 48px);
  animation: float 4s ease-in-out infinite;
}
.ms__cloud {
  position: absolute;
  font-size: clamp(18px, 3vw, 28px);
  opacity: .85;
  animation: drift 8s linear infinite;
}
.ms__cloud--1 { top: 14%; left: 12%; animation-duration: 9s; }
.ms__cloud--2 { top: 22%; left: 45%; animation-duration: 12s; animation-delay: -3s; }

.ms__mount {
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  clip-path: polygon(0 100%, 50% 0%, 100% 100%);
}
.ms__mount--back  {
  height: 62%;
  background: linear-gradient(to bottom, #78909C, #546E7A);
  left: -10%; right: -10%;
  clip-path: polygon(0 100%, 40% 10%, 80% 100%);
  opacity: .7;
}
.ms__mount--mid {
  height: 55%;
  background: linear-gradient(to bottom, #4CAF50, #2E7D32);
  clip-path: polygon(5% 100%, 30% 5%, 60% 100%);
  left: 0; right: 20%;
}
.ms__mount--front {
  height: 45%;
  background: linear-gradient(to bottom, #66BB6A, #388E3C);
  clip-path: polygon(30% 100%, 70% 8%, 100% 100%);
  left: 20%; right: -5%;
}
.ms__ground {
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 20%;
  background: linear-gradient(to bottom, #81C784, #4CAF50);
}
.ms__figures {
  position: absolute; bottom: 18%; left: 50%; transform: translateX(-50%);
  font-size: clamp(18px, 3vw, 26px);
  letter-spacing: 4px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,.2));
}

.about__badge {
  position: absolute;
  bottom: 20px; right: 20px;
  background: var(--orange);
  color: var(--white);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  text-align: center;
  box-shadow: var(--shadow-md);
}
.about__badge-num  { display: block; font-size: 11px; font-weight: 500; opacity: .9; }
.about__badge-year { display: block; font-size: 22px; font-weight: 900; line-height: 1; }

.about__heading {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--green);
}
.about__text {
  color: var(--text-light);
  margin-bottom: 16px;
  font-size: 15px;
}
.about__checklist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 24px;
}
.about__checklist li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  background: var(--green-pale);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
}
.check-icon { font-size: 16px; flex-shrink: 0; }

/* ---------- TOURS ---------- */
.tours {
  background: var(--gray-100);
}

.tour-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}
.filter-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  border: 2px solid var(--gray-200);
  background: var(--white);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--green-light); color: var(--green); }
.filter-btn.active {
  background: var(--green);
  border-color: var(--green);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(46,125,50,.3);
}

.tours__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

/* Tour Card */
.tour-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.tour-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

.tour-card__thumb {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 64px;
  position: relative;
  overflow: hidden;
}
.tour-card__emoji {
  display: block;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1);
  position: relative;
  z-index: 1;
}
.tour-card:hover .tour-card__emoji {
  transform: scale(1.18) rotate(-6deg);
}
.tour-card__level-badge {
  position: absolute;
  top: 12px; left: 12px;
  background: rgba(0,0,0,.45);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  backdrop-filter: blur(4px);
}
.tour-card__tag {
  position: absolute;
  top: 12px; right: 12px;
  background: var(--orange);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.tour-card__body { padding: 20px; }
.tour-card__name {
  font-size: 17px;
  font-weight: 900;
  margin-bottom: 8px;
  color: var(--text);
}
.tour-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.tour-card__meta span {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-light);
  background: var(--gray-100);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}
.tour-card__price-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--gray-200);
}
.tour-card__price-label { font-size: 11px; color: var(--gray-500); }
.tour-card__price {
  font-family: 'Montserrat', sans-serif;
  font-size: 22px;
  font-weight: 900;
  color: var(--orange);
}
.tour-card__price small { font-size: 12px; font-weight: 500; color: var(--gray-500); }
.tour-card__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 14px;
  padding: 10px;
  border-radius: var(--radius-sm);
  background: var(--green);
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  transition: background var(--transition);
}
.tour-card__btn:hover { background: var(--green-light); }
.tour-card__btn .btn-arrow {
  display: inline-block;
  transition: transform .25s ease;
}
.tour-card__btn:hover .btn-arrow { transform: translateX(5px); }

/* ---------- FEATURES ---------- */
.features {
  background: var(--white);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--gray-100);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 2px solid transparent;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--green-pale);
  background: var(--white);
}
.feature-card__icon {
  font-size: 44px;
  margin-bottom: 16px;
  display: block;
  line-height: 1;
  transition: transform .3s ease;
}
.feature-card:hover .feature-card__icon {
  animation: icon-bounce .45s ease;
}
.feature-card__title {
  font-size: 17px;
  font-weight: 900;
  margin-bottom: 10px;
  color: var(--green);
}
.feature-card__text {
  font-size: 13.5px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ---------- VOICE ---------- */
.voice {
  background: linear-gradient(135deg, var(--green-pale) 0%, var(--orange-pale) 100%);
}

.voice__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.voice-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}
.voice-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.voice-card::before {
  content: '"';
  position: absolute;
  top: 12px; left: 20px;
  font-size: 80px;
  line-height: 1;
  color: var(--green-pale);
  font-family: Georgia, serif;
  pointer-events: none;
}

.voice-card__stars {
  font-size: 16px;
  color: var(--orange-light);
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.voice-card__text {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}
.voice-card__author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--gray-200);
  padding-top: 16px;
}
.voice-card__avatar  { font-size: 32px; }
.voice-card__name    { display: block; font-size: 14px; font-weight: 700; }
.voice-card__age     { display: block; font-size: 12px; color: var(--gray-500); }

/* ---------- CONTACT ---------- */
.contact {
  background: var(--white);
}

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 56px;
  align-items: start;
}

/* Form */
.contact-form {
  background: var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}
.required {
  display: inline-block;
  background: #E53935;
  color: var(--white);
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 6px;
  vertical-align: middle;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  background: var(--white);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--green-light);
  box-shadow: 0 0 0 3px rgba(76,175,80,.15);
}
.form-textarea { resize: vertical; min-height: 120px; }

.form-success {
  display: none;
  margin-top: 16px;
  background: var(--green-pale);
  color: var(--green);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
}

/* Contact info */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.contact-info__item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--gray-100);
  padding: 20px;
  border-radius: var(--radius-md);
}
.contact-info__icon { font-size: 28px; flex-shrink: 0; }
.contact-info__label { display: block; font-size: 11px; color: var(--gray-500); margin-bottom: 2px; }
.contact-info__value { display: block; font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.contact-info__note  { display: block; font-size: 11px; color: var(--gray-500); }

.contact-info__sns { text-align: center; }
.contact-info__sns p { font-size: 13px; color: var(--gray-500); margin-bottom: 12px; }
.sns-links { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.sns-link {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  transition: opacity var(--transition), transform var(--transition);
  color: var(--white);
}
.sns-link:hover { opacity: .85; transform: translateY(-2px); }
.sns-link--instagram { background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366); }
.sns-link--twitter   { background: #1DA1F2; }
.sns-link--line      { background: #06C755; }
.sns-link--note      { background: #41C9B4; }

/* ---------- FOOTER ---------- */
.footer {
  background: #1A1A1A;
  color: rgba(255,255,255,.75);
  padding: 48px 0 24px;
}
.footer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
  flex-wrap: wrap;
  gap: 24px;
}
.footer__logo { display: flex; align-items: center; gap: 10px; opacity: .9; }
.footer__logo .logo-main { color: #A5D6A7; }
.footer__logo .logo-sub  { color: rgba(255,255,255,.5); }
.footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.footer__nav a {
  padding: 6px 14px;
  font-size: 13px;
  border-radius: var(--radius-full);
  color: rgba(255,255,255,.7);
  border: 1px solid rgba(255,255,255,.15);
  transition: background var(--transition), color var(--transition);
}
.footer__nav a:hover { background: rgba(255,255,255,.1); color: var(--white); }
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.footer__copy { font-size: 12px; }
.footer__links { display: flex; gap: 16px; }
.footer__links a { font-size: 12px; color: rgba(255,255,255,.5); }
.footer__links a:hover { color: rgba(255,255,255,.9); }

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--green);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 99;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: translateY(-3px); }
.back-to-top.visible::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--green);
  animation: pulse-ring 2.4s ease-out infinite;
}

/* ---------- Scroll Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Animations ---------- */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}
@keyframes drift {
  0%   { transform: translateX(0); }
  50%  { transform: translateX(10px); }
  100% { transform: translateX(0); }
}
@keyframes icon-bounce {
  0%   { transform: scale(1) rotate(0); }
  35%  { transform: scale(1.22) rotate(-8deg); }
  65%  { transform: scale(0.94) rotate(4deg); }
  100% { transform: scale(1) rotate(0); }
}
@keyframes pulse-ring {
  0%   { transform: scale(1);   opacity: .55; }
  100% { transform: scale(1.7); opacity: 0;   }
}
@keyframes ripple-spread {
  to { transform: scale(4); opacity: 0; }
}
@keyframes card-filter-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   マイクロインタラクション
   ============================================================ */

/* --- リップルエフェクト（ボタンクリック時の波紋） --- */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,.38);
  transform: scale(0);
  animation: ripple-spread .55s ease-out forwards;
  pointer-events: none;
}

/* --- ツアーフィルター切替アニメーション --- */
.tour-card--filter-in {
  animation: card-filter-in .32s ease both;
}

/* --- フォームバリデーション リアルタイム --- */
.form-input.is-valid {
  border-color: var(--green-light);
  box-shadow: 0 0 0 3px rgba(76,175,80,.12);
}
.form-input.is-invalid {
  border-color: #E53935;
  box-shadow: 0 0 0 3px rgba(229,57,53,.1);
  animation: shake .35s ease;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-5px); }
  60%       { transform: translateX(5px); }
  80%       { transform: translateX(-3px); }
}

/* --- チェックリスト スタガード表示 --- */
.about__checklist li {
  opacity: 0;
  transform: translateX(-12px);
  transition: opacity .4s ease, transform .4s ease;
}
.about__checklist.is-staggered li:nth-child(1) { transition-delay: .05s; }
.about__checklist.is-staggered li:nth-child(2) { transition-delay: .15s; }
.about__checklist.is-staggered li:nth-child(3) { transition-delay: .25s; }
.about__checklist.is-staggered li:nth-child(4) { transition-delay: .35s; }
.about__checklist.is-staggered li {
  opacity: 1;
  transform: translateX(0);
}

/* --- コンタクト情報アイコン ホバー --- */
.contact-info__item {
  transition: box-shadow var(--transition), transform var(--transition);
}
.contact-info__item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}
.contact-info__item .contact-info__icon {
  transition: transform .3s cubic-bezier(.34,1.56,.64,1);
}
.contact-info__item:hover .contact-info__icon {
  transform: scale(1.2);
}

/* --- セクションタグ ホバー --- */
.section-tag {
  transition: background var(--transition), color var(--transition), transform var(--transition);
  cursor: default;
}
.section-tag:hover {
  background: var(--green);
  color: var(--white);
  transform: scale(1.04);
}

/* --- 部員の声 引用符ホバー --- */
.voice-card:hover::before {
  color: rgba(46,125,50,.18);
  transition: color .3s ease;
}

/* --- フィーチャーカード トランジション強化 --- */
.feature-card {
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

/* ============================================================
   レスポンシブ
   ============================================================ */

/* タブレット (1024px以下) */
@media (max-width: 1024px) {
  .features__grid { grid-template-columns: repeat(2, 1fr); }
  .contact__inner { grid-template-columns: 1fr; }
}

/* タブレット縦 (768px以下) */
@media (max-width: 768px) {
  .section { padding: 64px 0; }

  /* Header */
  .hamburger { display: flex; }
  .nav {
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: var(--white);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height .4s ease, padding .4s ease;
    box-shadow: var(--shadow-md);
  }
  .nav.is-open { max-height: 400px; padding: 16px 0 24px; }
  .nav__list { flex-direction: column; align-items: stretch; padding: 0 20px; gap: 4px; }
  .nav__link { padding: 12px 16px; border-radius: var(--radius-sm); }
  .nav__link--cta { text-align: center; margin-top: 8px; }

  /* Hero */
  .hero__buttons { flex-direction: column; align-items: flex-start; }
  .btn { width: 100%; max-width: 280px; }
  .hero__stats { gap: 16px; }
  .stat__num { font-size: 28px; }
  .stat__divider { height: 36px; }

  /* About */
  .about__grid { grid-template-columns: 1fr; gap: 36px; }
  .about__visual { order: -1; }

  /* Voices */
  .voice__grid { grid-template-columns: 1fr; }

  /* Features */
  .features__grid { grid-template-columns: 1fr; }

  /* Contact form */
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 24px 20px; }

  /* Footer */
  .footer__top { flex-direction: column; align-items: flex-start; }
  .footer__bottom { flex-direction: column; align-items: center; text-align: center; }
}

/* スマートフォン (480px以下) */
@media (max-width: 480px) {
  .tours__grid { grid-template-columns: 1fr; }
  .hero__title { font-size: 32px; }
  .hero__stats { flex-direction: column; align-items: flex-start; gap: 12px; }
  .stat__divider { display: none; }
}

/* ============================================================
   富士登山詳細セクション (FUJI CLIMB 2026)
   ============================================================ */

.fuji-section { background: #f5faf5; }

/* 富士山データ + 吉田ルート */
.fuji-about {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2rem;
  margin-top: 2rem;
}
.fuji-stats-col { display: flex; flex-direction: column; gap: 1rem; }
.fuji-data-card {
  background: #fff;
  border: 1px solid #c8e6c9;
  border-left: 5px solid var(--green);
  border-radius: var(--radius-sm);
  padding: 1.2rem 1.5rem;
}
.fuji-data-num {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--green);
  line-height: 1;
}
.fuji-data-unit { font-size: 1.2rem; }
.fuji-data-label { font-weight: 700; margin-top: 0.3rem; display: block; }
.fuji-data-sub { font-size: 0.8rem; color: var(--gray-500); }

.fuji-route-col {
  background: #1a4f2e;
  color: #fff;
  border-radius: var(--radius-md);
  padding: 2rem;
}
.fuji-route-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid rgba(255,255,255,0.25);
}
.fuji-route-title span {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  opacity: 0.65;
  display: block;
  margin-top: 0.25rem;
}
.fuji-route-list { list-style: none; padding: 0; margin: 0; }
.fuji-route-list li {
  padding: 0.65rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
}
.fuji-route-list li::before { content: "✓"; color: #6fcf7a; font-weight: 700; }

/* 企画概要グリッド */
.fuji-plan-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.fuji-plan-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 1.5rem 1rem;
  text-align: center;
  border-top: 4px solid var(--green);
  box-shadow: var(--shadow-sm);
}
.fuji-plan-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.fuji-plan-label { font-size: 0.78rem; color: var(--gray-500); }
.fuji-plan-value { font-size: 1.25rem; font-weight: 700; color: #1a4f2e; margin: 0.3rem 0; }
.fuji-plan-sub { font-size: 0.78rem; color: var(--text-light); }

/* 初心者サポート */
.fuji-beginner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.fuji-worry, .fuji-support {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.fuji-worry h3 {
  background: var(--orange);
  color: #fff;
  padding: 0.9rem 1.5rem;
  font-size: 1rem;
  margin: 0;
}
.fuji-support h3 {
  background: #1a4f2e;
  color: #fff;
  padding: 0.9rem 1.5rem;
  font-size: 1rem;
  margin: 0;
}
.fuji-worry ul, .fuji-support ul {
  padding: 1rem 1.5rem;
  list-style: none;
  margin: 0;
}
.fuji-worry ul li, .fuji-support ul li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  font-size: 0.92rem;
}
.fuji-worry ul li::before { content: "●"; color: var(--orange); font-size: 0.6rem; margin-top: 0.45rem; flex-shrink: 0; }
.fuji-support ul li::before { content: "✅"; flex-shrink: 0; }

/* スケジュール */
.fuji-schedule-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.fuji-day-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #1a4f2e;
  margin-bottom: 1.2rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid #c8e6c9;
}
.fuji-day-title span { font-size: 0.82rem; color: var(--text-light); margin-left: 0.4rem; font-weight: 400; }
.fuji-timeline-item {
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
  align-items: flex-start;
}
.fuji-time {
  background: #1a4f2e;
  color: #fff;
  border-radius: var(--radius-full);
  padding: 0.35rem 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-align: center;
}
.fuji-event {
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem;
  border: 1px solid #c8e6c9;
  font-size: 0.88rem;
  line-height: 1.55;
}
.fuji-timeline-item--highlight .fuji-time { background: var(--orange); }
.fuji-timeline-item--highlight .fuji-event { background: #fff5e6; border-color: var(--orange-light); }

/* 費用内訳 */
.fuji-cost-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.fuji-cost-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.fuji-cost-head {
  padding: 1rem 1.2rem 0.4rem;
  color: #fff;
  text-align: center;
}
.fuji-cost-head h3 { font-size: 1rem; margin: 0 0 0.2rem; }
.fuji-cost-head p { font-size: 0.75rem; margin: 0; opacity: 0.85; }
.fuji-cost-card--dark  .fuji-cost-head { background: #1a4f2e; }
.fuji-cost-card--mid   .fuji-cost-head { background: #2d8653; }
.fuji-cost-card--orange .fuji-cost-head { background: var(--orange); }
.fuji-cost-items { padding: 0.9rem 1.2rem; }
.fuji-cost-item {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  font-size: 0.84rem;
  border-bottom: 1px solid var(--gray-200);
}
.fuji-cost-item span:last-child { font-weight: 600; }
.fuji-cost-subtotal {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 1.2rem;
  font-weight: 700;
  background: var(--gray-100);
  font-size: 0.9rem;
}
.fuji-cost-card--dark   .fuji-cost-subtotal span:last-child { color: #1a4f2e; }
.fuji-cost-card--mid    .fuji-cost-subtotal span:last-child { color: #2d8653; }
.fuji-cost-card--orange .fuji-cost-subtotal span:last-child { color: var(--orange); }

.fuji-cost-total {
  background: #1a4f2e;
  color: #fff;
  border-radius: var(--radius-md);
  padding: 1.4rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
}
.fuji-cost-total-label { font-size: 0.9rem; letter-spacing: 0.04em; }
.fuji-cost-total-value { font-size: 2rem; font-weight: 900; color: #ffd54f; }

/* 装備 */
.fuji-gear-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.fuji-gear-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.fuji-gear-card h3 {
  background: #1a4f2e;
  color: #fff;
  padding: 0.75rem 1.2rem;
  font-size: 0.95rem;
  margin: 0;
}
.fuji-gear-card ul { padding: 0.9rem 1.2rem; list-style: none; margin: 0; }
.fuji-gear-card ul li {
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--gray-200);
  font-size: 0.88rem;
  display: flex;
  gap: 0.5rem;
}
.fuji-gear-card ul li::before { content: "◦"; color: var(--green); font-weight: 700; }
.fuji-gear-note {
  text-align: center;
  background: #fffde7;
  border: 1px solid #ffe082;
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--text);
}

/* 準備サポートブロック */
.fuji-prep {
  background: linear-gradient(135deg, #1a4f2e 0%, #2d8653 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  margin-top: 2.5rem;
}
.fuji-prep__badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-full);
  padding: 0.35rem 1rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}
.fuji-prep__title {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 1.2rem;
}
.fuji-prep__desc {
  font-size: 0.95rem;
  line-height: 1.8;
  opacity: 0.9;
  margin-bottom: 2rem;
  max-width: 680px;
}
.fuji-prep__desc strong { color: #ffd54f; }
.fuji-prep__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}
.fuji-prep__step {
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 1.2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.fuji-prep__step--goal {
  background: rgba(255,213,79,0.2);
  border: 1px solid rgba(255,213,79,0.4);
}
.fuji-prep__step-num {
  font-size: 1.4rem;
  font-weight: 900;
  color: #ffd54f;
  line-height: 1;
}
.fuji-prep__step strong { font-size: 0.9rem; display: block; margin-bottom: 0.3rem; }
.fuji-prep__step p { font-size: 0.8rem; opacity: 0.85; line-height: 1.6; margin: 0; }
.fuji-prep__note {
  background: rgba(255,255,255,0.1);
  border-left: 4px solid #ffd54f;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 0.9rem 1.2rem;
  font-size: 0.9rem;
  margin: 0;
}

@media (max-width: 768px) {
  .fuji-prep__steps { grid-template-columns: 1fr 1fr; }
  .fuji-prep__title { font-size: 1.2rem; }
  .fuji-prep { padding: 2rem 1.5rem; }
}
@media (max-width: 480px) {
  .fuji-prep__steps { grid-template-columns: 1fr; }
}

/* SNS note リンク */
.sns-link--note { background: #41c9b4 !important; }

/* レスポンシブ（富士登山セクション） */
@media (max-width: 768px) {
  .fuji-about,
  .fuji-beginner,
  .fuji-schedule-grid { grid-template-columns: 1fr; }
  .fuji-plan-grid,
  .fuji-cost-grid,
  .fuji-gear-grid { grid-template-columns: 1fr; }
  .fuji-cost-total { flex-direction: column; gap: 0.5rem; text-align: center; }
}
  .back-to-top { bottom: 16px; right: 16px; }
}