/* ============================================================
   HOMEDE SAUNA - stylesheet
   ============================================================ */

:root {
  --green-900: #1f3a2a;
  --green-700: #2b5f3f;
  --green-500: #4a8761;
  --green-300: #a8c9b4;
  --green-50:  #eef4f0;
  --ink-900:   #121a14;
  --ink-700:   #2a332d;
  --ink-500:   #5b655f;
  --ink-300:   #a7ada9;
  --cream:     #f7f5ef;
  --white:     #ffffff;
  --radius:    6px;
  --maxw:      1180px;
  --ease:      cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  color: var(--ink-900);
  background: var(--cream);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt";
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid rgba(0,0,0,.06);
}
.site-header .inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
}
.brand {
  font-weight: 700; letter-spacing: .12em; font-size: 18px;
  color: var(--green-900);
  display: flex; align-items: center; gap: 8px;
}
.brand .mark {
  width: 24px; height: 24px; border-radius: 50%;
  background: linear-gradient(135deg, var(--green-500), var(--green-900));
  display: inline-block;
}
.nav { display: flex; gap: 28px; align-items: center; }
.nav a {
  font-size: 13px; letter-spacing: .08em; color: var(--ink-700);
  transition: color .25s var(--ease);
}
.nav a:hover { color: var(--green-700); }
.nav .cta {
  padding: 10px 18px; border-radius: 999px;
  background: var(--green-700); color: #fff;
  letter-spacing: .08em; font-weight: 500;
  transition: background .25s var(--ease), transform .25s var(--ease);
}
.nav .cta:hover { background: var(--green-900); transform: translateY(-1px); }

.hamburger {
  display: none; width: 36px; height: 36px; border: 0; background: transparent;
  position: relative;
}
.hamburger span {
  position: absolute; left: 6px; right: 6px; height: 2px; background: var(--ink-900);
  transition: transform .3s var(--ease), opacity .2s;
}
.hamburger span:nth-child(1) { top: 12px; }
.hamburger span:nth-child(2) { top: 18px; }
.hamburger span:nth-child(3) { top: 24px; }
.nav-open .hamburger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-open .hamburger span:nth-child(2) { opacity: 0; }
.nav-open .hamburger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  height: 100vh; min-height: 620px; max-height: 820px;
  overflow: hidden;
  background: var(--ink-900);
}
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
  position: absolute; inset: 0; opacity: 0;
  animation: fade 12s infinite;
}
.hero-slide:nth-child(1) { animation-delay: -1s; }
.hero-slide:nth-child(2) { animation-delay: 5s; }
.hero-slide picture, .hero-slide img {
  width: 100%; height: 100%; object-fit: cover;
}
@keyframes fade {
  0%     { opacity: 0; transform: scale(1.04); }
  8.33%  { opacity: 1; }
  50%    { opacity: 1; transform: scale(1); }
  58.33% { opacity: 0; }
  100%   { opacity: 0; transform: scale(1); }
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.25) 0%, rgba(0,0,0,.1) 40%, rgba(0,0,0,.55) 100%);
}
.hero-copy {
  position: absolute; left: 0; right: 0; bottom: 12%;
  z-index: 2; color: #fff; text-align: center;
  padding: 0 24px;
  animation: rise 1.4s var(--ease) .3s both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-copy .eyebrow {
  display: inline-block;
  font-size: 12px; letter-spacing: .4em;
  padding: 6px 16px; border: 1px solid rgba(255,255,255,.6);
  border-radius: 999px; margin-bottom: 24px;
}
.hero-copy h1 {
  font-size: clamp(32px, 6vw, 64px);
  letter-spacing: .08em; line-height: 1.3;
  margin: 0 0 20px; font-weight: 700;
  text-shadow: 0 2px 20px rgba(0,0,0,.25);
}
.hero-copy p {
  font-size: clamp(14px, 1.6vw, 17px);
  letter-spacing: .1em; margin: 0 0 32px;
  text-shadow: 0 2px 12px rgba(0,0,0,.3);
}
.hero-copy .buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px; border-radius: 999px;
  font-size: 14px; letter-spacing: .1em; font-weight: 500;
  transition: all .3s var(--ease);
  border: 1px solid transparent;
}
.btn-primary { background: var(--green-700); color: #fff; }
.btn-primary:hover { background: var(--green-900); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0,0,0,.2); }
.btn-ghost { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.5); }
.btn-ghost:hover { background: rgba(255,255,255,.2); }
.btn-dark { background: var(--ink-900); color: #fff; }
.btn-dark:hover { background: #000; transform: translateY(-2px); }
.btn .arrow { transition: transform .3s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

.scroll-cue {
  position: absolute; left: 50%; bottom: 24px; transform: translateX(-50%);
  color: #fff; font-size: 10px; letter-spacing: .3em; z-index: 2;
  writing-mode: vertical-rl;
}
.scroll-cue::after {
  content: ""; display: block; margin: 10px auto 0;
  width: 1px; height: 48px; background: #fff;
  animation: cue 2s infinite;
}
@keyframes cue {
  0%, 100% { transform: scaleY(0); transform-origin: top; }
  50%      { transform: scaleY(1); transform-origin: top; }
  51%      { transform-origin: bottom; }
}

/* ---------- Sections ---------- */
section { padding: 100px 0; position: relative; }
@media (max-width: 768px) { section { padding: 72px 0; } }

.section-head { text-align: center; margin-bottom: 56px; }
.section-head .en {
  display: block; font-size: 12px; letter-spacing: .4em;
  color: var(--green-700); font-weight: 500; margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(24px, 3.6vw, 36px);
  margin: 0; letter-spacing: .08em; line-height: 1.5;
}
.section-head .lead {
  margin-top: 20px; color: var(--ink-500);
  font-size: 15px; max-width: 640px; margin-left: auto; margin-right: auto;
}

/* ---------- Intro ---------- */
.intro { background: var(--white); }
.intro .text {
  max-width: 720px; margin: 0 auto; text-align: center;
}
.intro .text p { font-size: 16px; color: var(--ink-700); }

/* ---------- Strength ---------- */
.strength { background: var(--cream); }
.strength-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
@media (max-width: 860px) { .strength-grid { grid-template-columns: 1fr; } }
.strength-card {
  background: #fff; padding: 44px 32px; border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(0,0,0,.04), 0 20px 40px -24px rgba(0,0,0,.1);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}
.strength-card:hover { transform: translateY(-6px); box-shadow: 0 1px 0 rgba(0,0,0,.04), 0 30px 60px -24px rgba(0,0,0,.18); }
.strength-card .num {
  font-size: 12px; letter-spacing: .3em; color: var(--green-700);
  margin-bottom: 20px;
}
.strength-card .icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--green-50); color: var(--green-700);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px; font-size: 24px;
}
.strength-card h3 {
  font-size: 20px; margin: 0 0 14px; letter-spacing: .04em;
}
.strength-card p { margin: 0; color: var(--ink-500); font-size: 14px; }

/* ---------- Plans ---------- */
.plans { background: var(--green-900); color: #fff; }
.plans .section-head .en { color: var(--green-300); }
.plans .section-head .lead { color: rgba(255,255,255,.75); }
.plan-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 24px; max-width: 940px; margin: 0 auto;
}
@media (max-width: 760px) { .plan-grid { grid-template-columns: 1fr; } }
.plan-card {
  background: #fff; color: var(--ink-900);
  border-radius: 10px; padding: 44px 36px;
  position: relative; overflow: hidden;
  transition: transform .4s var(--ease);
}
.plan-card:hover { transform: translateY(-4px); }
.plan-card.featured { background: linear-gradient(180deg, #fff, #fbfaf5); border: 2px solid var(--green-500); }
.plan-card .badge {
  position: absolute; top: 20px; right: 20px;
  background: var(--green-700); color: #fff;
  font-size: 11px; letter-spacing: .2em; padding: 6px 14px; border-radius: 999px;
}
.plan-card .plan-name {
  font-size: 12px; letter-spacing: .3em; color: var(--green-700);
  margin-bottom: 8px;
}
.plan-card h3 {
  font-size: 24px; margin: 0 0 24px; letter-spacing: .06em;
}
.plan-price {
  display: flex; align-items: baseline; gap: 6px; margin-bottom: 8px;
}
.plan-price .currency { font-size: 18px; }
.plan-price .amount { font-size: 44px; font-weight: 700; letter-spacing: -.02em; }
.plan-price .unit { font-size: 13px; color: var(--ink-500); }
.plan-note { font-size: 12px; color: var(--ink-500); margin-bottom: 24px; }
.plan-init {
  padding: 12px 16px; background: var(--green-50);
  border-radius: 6px; font-size: 13px; color: var(--ink-700);
  margin-bottom: 28px; display: flex; justify-content: space-between;
}
.plan-init strong { color: var(--green-900); font-weight: 700; }
.plan-feat { list-style: none; padding: 0; margin: 0 0 28px; }
.plan-feat li {
  padding: 10px 0; border-bottom: 1px solid rgba(0,0,0,.06);
  font-size: 14px; color: var(--ink-700);
  display: flex; align-items: center; gap: 10px;
}
.plan-feat li::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--green-500); flex-shrink: 0;
}
.plan-card .btn { width: 100%; justify-content: center; }
.plan-caveat { color: rgba(255,255,255,.6); font-size: 12px; text-align: center; margin-top: 24px; }

/* ---------- Purchase callout (一括購入) ---------- */
.purchase-callout {
  margin-top: 56px;
  background: linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 10px;
  padding: 32px 36px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
}
.purchase-callout .pc-text { flex: 1 1 320px; }
.purchase-callout .pc-en {
  display: block; font-size: 11px; letter-spacing: .3em;
  color: var(--green-300); margin-bottom: 10px;
}
.purchase-callout h3 {
  font-size: 20px; margin: 0 0 8px; color: #fff; letter-spacing: .06em;
}
.purchase-callout p {
  margin: 0; color: rgba(255,255,255,.75); font-size: 14px;
}
.purchase-callout .btn { flex-shrink: 0; }
@media (max-width: 640px) {
  .purchase-callout { padding: 28px 24px; }
  .purchase-callout .btn { width: 100%; justify-content: center; }
}

/* ---------- Contact form ---------- */
.contact-form {
  max-width: 680px; margin: 48px auto 0;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 10px;
  padding: 40px 36px;
  text-align: left;
  backdrop-filter: blur(4px);
}
.contact-form .form-row { margin-bottom: 20px; }
.contact-form .form-row.half {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
@media (max-width: 560px) { .contact-form .form-row.half { grid-template-columns: 1fr; } }
.contact-form label {
  display: block; font-size: 13px; letter-spacing: .06em;
  margin-bottom: 8px; color: rgba(255,255,255,.9); font-weight: 500;
}
.contact-form label .req {
  color: #ffd27f; font-size: 10px; margin-left: 6px;
  background: rgba(255,210,127,.15); padding: 2px 6px; border-radius: 3px;
  letter-spacing: .1em; vertical-align: middle;
}
.contact-form label .opt {
  color: rgba(255,255,255,.5); font-size: 10px; margin-left: 6px;
  letter-spacing: .1em; vertical-align: middle;
}
.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form input[type="tel"],
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255,255,255,.95);
  border: 1px solid transparent;
  border-radius: 6px;
  font: inherit; font-size: 15px;
  color: var(--ink-900);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--green-300);
  box-shadow: 0 0 0 4px rgba(168,201,180,.25);
}
.contact-form textarea { resize: vertical; min-height: 140px; }
.contact-form select { appearance: none; -webkit-appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%232b5f3f' d='M6 8L0 0h12z'/></svg>");
  background-repeat: no-repeat; background-position: right 16px center;
  padding-right: 44px;
}
.contact-form .checkbox {
  display: flex; align-items: flex-start; gap: 10px;
  color: rgba(255,255,255,.85); font-size: 13px;
  cursor: pointer; margin-bottom: 24px;
}
.contact-form .checkbox input { margin-top: 3px; accent-color: var(--green-500); }
.contact-form .checkbox a { color: var(--green-300); text-decoration: underline; }
.contact-form .honey { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.contact-form .submit-wrap { text-align: center; }
.contact-form button[type="submit"] {
  padding: 16px 48px; min-width: 240px;
  background: #fff; color: var(--green-900);
  border: 0; border-radius: 999px;
  font-weight: 700; letter-spacing: .1em; font-size: 15px;
  transition: all .3s var(--ease);
}
.contact-form button[type="submit"]:hover:not(:disabled) {
  background: var(--ink-900); color: #fff; transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0,0,0,.2);
}
.contact-form button[type="submit"]:disabled { opacity: .5; cursor: wait; }

.form-status {
  padding: 16px 20px; border-radius: 6px;
  font-size: 14px; margin-bottom: 20px;
  display: none;
}
.form-status.show { display: block; }
.form-status.success { background: rgba(168,201,180,.95); color: var(--green-900); }
.form-status.error   { background: rgba(255,180,160,.95); color: #6a2015; }

/* ---------- Flow ---------- */
.flow { background: var(--cream); }
.flow-list {
  display: grid; grid-template-columns: repeat(6, 1fr);
  gap: 14px; counter-reset: step;
}
@media (max-width: 980px) { .flow-list { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px) { .flow-list { grid-template-columns: repeat(2, 1fr); } }
.flow-item {
  background: #fff; padding: 28px 20px; border-radius: var(--radius);
  text-align: center; position: relative; counter-increment: step;
}
.flow-item::before {
  content: counter(step, decimal-leading-zero);
  display: block; font-size: 11px; letter-spacing: .2em;
  color: var(--green-700); margin-bottom: 14px; font-weight: 600;
}
.flow-item .ic {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--green-50); margin: 0 auto 14px;
  display: flex; align-items: center; justify-content: center;
  color: var(--green-700); font-size: 22px;
}
.flow-item h4 { font-size: 14px; margin: 0; letter-spacing: .04em; }

/* ---------- FAQ ---------- */
.faq { background: var(--white); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid rgba(0,0,0,.08);
}
.faq-q {
  width: 100%; text-align: left; background: transparent; border: 0;
  padding: 22px 44px 22px 48px; position: relative;
  font-size: 15px; font-weight: 500; letter-spacing: .04em;
  color: var(--ink-900);
}
.faq-q::before {
  content: "Q"; position: absolute; left: 12px; top: 50%;
  transform: translateY(-50%); color: var(--green-700); font-weight: 700;
  letter-spacing: 0;
}
.faq-q::after {
  content: ""; position: absolute; right: 16px; top: 50%;
  width: 14px; height: 14px;
  background:
    linear-gradient(var(--ink-500),var(--ink-500)) center/14px 2px no-repeat,
    linear-gradient(var(--ink-500),var(--ink-500)) center/2px 14px no-repeat;
  transform: translateY(-50%);
  transition: transform .3s var(--ease);
}
.faq-item.open .faq-q::after {
  background:
    linear-gradient(var(--ink-500),var(--ink-500)) center/14px 2px no-repeat;
  transform: translateY(-50%) rotate(180deg);
}
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height .4s var(--ease);
}
.faq-a-inner {
  padding: 0 48px 24px; color: var(--ink-500); font-size: 14px;
  position: relative;
}
.faq-a-inner::before {
  content: "A"; position: absolute; left: 12px; top: 0;
  color: var(--green-500); font-weight: 700;
}

/* ---------- Company ---------- */
.company { background: var(--cream); }
.company-table {
  max-width: 780px; margin: 0 auto;
  background: #fff; border-radius: var(--radius); overflow: hidden;
}
.company-row {
  display: grid; grid-template-columns: 200px 1fr;
  border-bottom: 1px solid rgba(0,0,0,.06);
}
.company-row:last-child { border-bottom: 0; }
.company-row dt {
  padding: 20px 24px; background: var(--green-50);
  color: var(--green-900); font-size: 13px; font-weight: 600; letter-spacing: .08em;
}
.company-row dd {
  padding: 20px 24px; margin: 0; font-size: 14px; color: var(--ink-700);
}
@media (max-width: 640px) {
  .company-row { grid-template-columns: 1fr; }
  .company-row dt { padding: 14px 20px; }
  .company-row dd { padding: 14px 20px; }
}

/* ---------- Contact ---------- */
.contact { background: var(--green-700); color: #fff; text-align: center; }
.contact .section-head .en { color: var(--green-300); }
.contact h2 { color: #fff; }
.contact p { max-width: 580px; margin: 0 auto 36px; color: rgba(255,255,255,.85); font-size: 15px; }
.contact-info {
  display: flex; justify-content: center; gap: 48px; flex-wrap: wrap;
  margin: 36px 0 40px;
}
.contact-info div { text-align: center; }
.contact-info .label { font-size: 11px; letter-spacing: .3em; color: var(--green-300); margin-bottom: 8px; }
.contact-info .value { font-size: 20px; font-weight: 500; letter-spacing: .04em; }
.contact-info .value a:hover { opacity: .8; }
.contact .btn-dark { padding: 18px 36px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink-900); color: rgba(255,255,255,.6);
  padding: 50px 0 30px; font-size: 13px;
}
.site-footer .inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 20px;
}
.site-footer .brand { color: #fff; }
.site-footer nav { display: flex; gap: 24px; }
.site-footer nav a { font-size: 12px; letter-spacing: .08em; }
.site-footer nav a:hover { color: #fff; }
.site-footer .copy { width: 100%; text-align: center; padding-top: 24px; margin-top: 10px; border-top: 1px solid rgba(255,255,255,.08); font-size: 11px; letter-spacing: .1em; }

/* ---------- Fade-in on scroll ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- Mobile nav ---------- */
@media (max-width: 820px) {
  .hamburger { display: block; }
  .nav {
    position: fixed; top: 72px; left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: flex-start;
    padding: 24px; gap: 20px;
    transform: translateY(-110%); opacity: 0; pointer-events: none;
    transition: transform .4s var(--ease), opacity .3s;
    border-bottom: 1px solid rgba(0,0,0,.08);
  }
  .nav-open .nav { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { font-size: 15px; }
  .nav .cta { align-self: stretch; text-align: center; }
}