/* ============================================================
   カルサイネイザンスクール MAKI — 共通スタイル
   白ベース × 明朝体 × グリーン基調（karsai.jp テイスト参照）
   ============================================================ */

:root {
  --paper:        #fbfaf5;   /* 生成りの白 */
  --paper-deep:   #f3f1e7;   /* セクション交互背景 */
  --ink:          #2f312b;   /* 墨色の文字 */
  --ink-soft:     #6b6e63;
  --green:        #5a9e3d;   /* 若葉 */
  --green-deep:   #3c6b26;   /* 深緑 */
  --green-pale:   #e8f0df;
  --teal:         #0e9d8e;   /* 差し色（ボタン等） */
  --coral:        #e2766f;   /* 差し色（強調CTA） */
  --gold:         #b99b5a;   /* 罫線などの上品な金 */
  --line-green:   #06c755;   /* LINE ブランド色 */
  --serif: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --sans:  "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --header-h: 88px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }

body {
  font-family: var(--sans);
  font-weight: 400;
  color: var(--ink);
  background: var(--paper);
  line-height: 2;
  font-size: 15.5px;
  letter-spacing: 0.06em;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--green-deep); text-decoration: none; transition: color .3s, opacity .3s; }
a:hover { color: var(--green); }
ul { list-style: none; }

/* ---- 紙の質感（微細ノイズ） ---- */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none; z-index: 0;
  opacity: .35;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0.55 0 0 0 0 0.55 0 0 0 0 0.5 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E");
}

main { position: relative; z-index: 1; }

/* ============================================================
   ヘッダー
   ============================================================ */
#site_header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 48px);
  background: rgba(251, 250, 245, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(60, 107, 38, .12);
  transition: box-shadow .3s;
}
#site_header.scrolled { box-shadow: 0 4px 24px rgba(47, 49, 43, .08); }

.site_logo { display: flex; flex-direction: column; line-height: 1.35; }
.site_logo .en {
  font-family: var(--serif); font-size: 20px; font-weight: 600;
  letter-spacing: .22em; color: var(--green-deep);
}
.site_logo .ja { font-size: 10.5px; letter-spacing: .28em; color: var(--ink-soft); }

#global_nav ul { display: flex; gap: clamp(14px, 2.2vw, 30px); align-items: center; }
#global_nav a {
  font-size: 13.5px; letter-spacing: .12em; color: var(--ink);
  position: relative; padding: 6px 0;
}
#global_nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1.5px; background: var(--green);
  transform: scaleX(0); transform-origin: right; transition: transform .35s ease;
}
#global_nav a:hover::after,
#global_nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
#global_nav a[aria-current="page"] { color: var(--green-deep); }

.nav_line_btn {
  background: var(--line-green); color: #fff !important;
  padding: 9px 20px !important; border-radius: 999px;
  font-weight: 500;
}
.nav_line_btn::after { display: none; }
.nav_line_btn:hover { opacity: .85; }

/* ---- モバイルメニュー ---- */
#menu_toggle {
  display: none;
  width: 46px; height: 46px; border: none; cursor: pointer;
  background: var(--green); border-radius: 8px;
  position: relative; z-index: 110;
}
#menu_toggle span {
  position: absolute; left: 13px; right: 13px; height: 2px;
  background: #fff; transition: transform .3s, opacity .3s;
}
#menu_toggle span:nth-child(1) { top: 16px; }
#menu_toggle span:nth-child(2) { top: 22px; }
#menu_toggle span:nth-child(3) { top: 28px; }
body.menu_open #menu_toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.menu_open #menu_toggle span:nth-child(2) { opacity: 0; }
body.menu_open #menu_toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 1200px) {
  #menu_toggle { display: block; }
  /* backdrop-filter があると fixed の基準がヘッダーになりオーバーレイが壊れるため、メニュー展開中は無効化 */
  body.menu_open #site_header { backdrop-filter: none; -webkit-backdrop-filter: none; }
  #global_nav {
    position: fixed; inset: 0; z-index: 105;
    background: var(--paper);
    display: grid; place-items: center;
    opacity: 0; visibility: hidden; transition: opacity .35s, visibility .35s;
  }
  body.menu_open #global_nav { opacity: 1; visibility: visible; }
  #global_nav ul { flex-direction: column; gap: 28px; text-align: center; }
  #global_nav a { font-size: 17px; font-family: var(--serif); }
}

/* ============================================================
   共通パーツ
   ============================================================ */
.inner { max-width: 1080px; margin: 0 auto; padding: 0 clamp(20px, 5vw, 40px); }
.inner--narrow { max-width: 860px; }

section { padding: clamp(72px, 10vw, 128px) 0; position: relative; }
.bg_alt { background: var(--paper-deep); }

/* ---- セクション見出し ---- */
.sec_head { margin-bottom: clamp(40px, 6vw, 64px); }
.sec_head .en {
  display: block; font-family: var(--serif); font-style: italic;
  font-size: 13px; letter-spacing: .34em; color: var(--green);
  text-transform: uppercase; margin-bottom: 14px;
}
.sec_head h2 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(26px, 4vw, 38px); letter-spacing: .14em; line-height: 1.6;
}
.sec_head::after {
  content: ""; display: block; width: 64px; height: 1px;
  background: linear-gradient(to right, var(--gold), transparent);
  margin-top: 26px;
}
.sec_head.center { text-align: center; }
.sec_head.center::after { margin-left: auto; margin-right: auto;
  background: linear-gradient(to right, transparent, var(--gold), transparent); }

.lead { color: var(--ink-soft); max-width: 640px; }
.center .lead { margin-left: auto; margin-right: auto; }

/* ---- ボタン ---- */
.btn {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--serif); font-size: 15px; letter-spacing: .18em;
  padding: 17px 44px; border-radius: 2px;
  background: var(--green-deep); color: #fff !important;
  position: relative; overflow: hidden; transition: background .35s;
}
.btn::after { content: "→"; font-family: var(--sans); transition: transform .3s; }
.btn:hover { background: var(--green); }
.btn:hover::after { transform: translateX(5px); }
.btn--ghost { background: transparent; color: var(--green-deep) !important; box-shadow: inset 0 0 0 1px var(--green-deep); }
.btn--ghost:hover { background: var(--green-pale); }
.btn--coral { background: var(--coral); }
.btn--coral:hover { background: #c95d56; }
.btn--line { background: var(--line-green); border-radius: 999px; font-family: var(--sans); font-weight: 500; }
.btn--line:hover { background: #05a648; }

/* ---- スクロールリビール ---- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s ease, transform .9s ease; }
.reveal.is_view { opacity: 1; transform: none; }

/* ---- 下層ページヒーロー ---- */
.page_hero {
  padding: calc(var(--header-h) + clamp(56px, 9vw, 110px)) 0 clamp(56px, 8vw, 96px);
  background:
    radial-gradient(ellipse 90% 120% at 85% -20%, var(--green-pale) 0%, transparent 55%),
    var(--paper);
  border-bottom: 1px solid rgba(60, 107, 38, .1);
  overflow: hidden;
}
.page_hero .en {
  font-family: var(--serif); font-style: italic; font-size: 13px;
  letter-spacing: .34em; color: var(--green); text-transform: uppercase;
}
.page_hero h1 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(30px, 5vw, 46px); letter-spacing: .12em;
  margin-top: 16px; line-height: 1.5;
}
.page_hero .hero_leaf {
  position: absolute; right: -40px; bottom: -60px;
  width: 280px; opacity: .1; pointer-events: none;
}
.page_hero { position: relative; }

/* パンくず */
.breadcrumb { margin-top: 28px; font-size: 12px; color: var(--ink-soft); letter-spacing: .1em; }
.breadcrumb a { color: var(--ink-soft); }
.breadcrumb a:hover { color: var(--green); }
.breadcrumb span::before { content: "／"; margin: 0 8px; opacity: .5; }

/* ---- 表組み ---- */
.def_table { width: 100%; border-collapse: collapse; }
.def_table th, .def_table td {
  padding: 22px 18px; text-align: left; vertical-align: top;
  border-bottom: 1px solid rgba(60, 107, 38, .15);
  font-weight: 400;
}
.def_table th {
  width: 220px; font-family: var(--serif); letter-spacing: .12em;
  color: var(--green-deep); white-space: nowrap;
}
@media (max-width: 640px) {
  .def_table th, .def_table td { display: block; width: 100%; }
  .def_table th { border-bottom: none; padding-bottom: 4px; }
  .def_table td { padding-top: 0; }
}

/* ---- CTA帯 ---- */
.cta_band {
  background:
    radial-gradient(ellipse 70% 130% at 15% 120%, rgba(90, 158, 61, .35) 0%, transparent 60%),
    var(--green-deep);
  color: #fff; text-align: center;
  padding: clamp(64px, 9vw, 104px) 0;
}
.cta_band h2 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(22px, 3.4vw, 32px); letter-spacing: .16em; line-height: 1.8;
}
.cta_band p { margin: 20px auto 36px; max-width: 560px; color: rgba(255,255,255,.85); font-size: 14.5px; }
.cta_band .btn { background: #fff; color: var(--green-deep) !important; }
.cta_band .btn:hover { background: var(--green-pale); }
.cta_band .btn--line { background: var(--line-green); color: #fff !important; }
.cta_band .btn--line:hover { background: #05a648; }
.cta_btns { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

/* ============================================================
   フッター
   ============================================================ */
#site_footer {
  background: #26301f; color: rgba(255, 255, 255, .8);
  padding: clamp(56px, 8vw, 88px) 0 0;
  font-size: 13.5px;
}
.footer_grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px;
}
@media (max-width: 820px) { .footer_grid { grid-template-columns: 1fr; gap: 36px; } }

.footer_brand .en {
  font-family: var(--serif); font-size: 22px; letter-spacing: .22em; color: #fff;
}
.footer_brand .ja { font-size: 11px; letter-spacing: .26em; margin-top: 6px; }
.footer_brand p { margin-top: 22px; line-height: 2.1; color: rgba(255,255,255,.6); }

.footer_nav h3, .footer_contact h3 {
  font-family: var(--serif); font-size: 13px; letter-spacing: .3em;
  color: var(--green); margin-bottom: 20px; font-weight: 600;
}
.footer_nav li { margin-bottom: 12px; }
.footer_nav a { color: rgba(255,255,255,.8); }
.footer_nav a:hover { color: #9fd97f; }
.footer_contact p { line-height: 2.1; color: rgba(255,255,255,.7); }
.footer_line_btn {
  display: inline-flex; align-items: center; gap: 10px;
  margin-top: 18px; padding: 11px 26px; border-radius: 999px;
  background: var(--line-green); color: #fff !important; font-weight: 500;
}
.footer_line_btn:hover { opacity: .85; }

.copyright {
  margin-top: clamp(40px, 6vw, 64px);
  border-top: 1px solid rgba(255,255,255,.12);
  padding: 24px 0; text-align: center;
  font-size: 11.5px; letter-spacing: .14em; color: rgba(255,255,255,.45);
}

#return_top {
  position: fixed; right: 24px; bottom: 24px; z-index: 90;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--green-deep); color: #fff;
  display: grid; place-items: center; font-size: 18px;
  opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s, background .3s;
}
#return_top.show { opacity: 1; visibility: visible; }
#return_top:hover { background: var(--green); }

/* ============================================================
   トップページ
   ============================================================ */
#hero {
  min-height: 100svh;
  display: flex; align-items: center;
  padding: calc(var(--header-h) + 40px) 0 80px;
  position: relative; overflow: hidden;
  background:
    radial-gradient(ellipse 70% 90% at 80% 10%, var(--green-pale) 0%, transparent 60%),
    radial-gradient(ellipse 50% 70% at 5% 95%, rgba(185, 155, 90, .14) 0%, transparent 60%),
    var(--paper);
}
.hero_inner { position: relative; z-index: 2; }
.hero_catch {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(32px, 6vw, 60px);
  letter-spacing: .12em; line-height: 1.85;
}
.hero_catch .accent { color: var(--green-deep); }
.hero_sub {
  margin-top: 32px; max-width: 560px;
  color: var(--ink-soft); font-size: clamp(14px, 1.6vw, 16px);
}
.hero_btns { margin-top: 48px; display: flex; gap: 18px; flex-wrap: wrap; }

/* 縦書きの装飾 */
.hero_vertical {
  position: absolute; top: 50%; right: clamp(16px, 6vw, 96px);
  transform: translateY(-50%);
  writing-mode: vertical-rl; font-family: var(--serif);
  font-size: clamp(15px, 2vw, 20px); letter-spacing: .5em;
  color: var(--green-deep); opacity: .55; z-index: 1;
  border-right: 1px solid var(--gold); padding-right: 22px;
  height: min(60vh, 480px);
}
@media (max-width: 720px) { .hero_vertical { display: none; } }

/* 大きな円（月・禅のモチーフ） */
.hero_circle {
  position: absolute; top: 50%; right: -8vw; transform: translateY(-56%);
  width: min(56vw, 640px); aspect-ratio: 1;
  border-radius: 50%; z-index: 0;
  background: radial-gradient(circle at 35% 30%, rgba(90,158,61,.16), rgba(90,158,61,.04) 65%, transparent 72%);
  outline: 1px solid rgba(90, 158, 61, .22);
  outline-offset: 24px;
}
.hero_scroll {
  position: absolute; left: 50%; bottom: 28px; transform: translateX(-50%);
  font-size: 10px; letter-spacing: .4em; color: var(--ink-soft);
  writing-mode: vertical-rl;
}
.hero_scroll::after {
  content: ""; display: block; width: 1px; height: 44px;
  background: var(--green-deep); margin: 10px auto 0;
  animation: scrolldown 2s ease infinite;
}
@keyframes scrolldown {
  0% { transform: scaleY(0); transform-origin: top; }
  45% { transform: scaleY(1); transform-origin: top; }
  55% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* トップ・紹介2カラム */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 80px); align-items: center; }
@media (max-width: 820px) { .split { grid-template-columns: 1fr; } }
.split_visual {
  aspect-ratio: 4 / 5; border-radius: 2px; position: relative;
  background:
    radial-gradient(circle at 70% 25%, rgba(90,158,61,.28), transparent 55%),
    linear-gradient(160deg, var(--green-pale), #dbe8cc 55%, #cfe0bd);
  display: grid; place-items: center; overflow: hidden;
}
.split_visual::after {
  content: ""; position: absolute; inset: 14px;
  border: 1px solid rgba(60, 107, 38, .25);
}
.split_visual svg { width: 44%; opacity: .5; }
.split_visual .vtxt {
  position: absolute; writing-mode: vertical-rl; font-family: var(--serif);
  letter-spacing: .4em; color: var(--green-deep); font-size: 15px; opacity: .8;
}

/* トップ・3つの特徴 */
.feature_grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 36px); }
@media (max-width: 820px) { .feature_grid { grid-template-columns: 1fr; } }
.feature_card {
  background: var(--paper); padding: 44px 32px 40px;
  border-top: 2px solid var(--green);
  box-shadow: 0 10px 40px rgba(47, 49, 43, .06);
  position: relative;
}
.feature_card .num {
  font-family: var(--serif); font-style: italic; font-size: 40px;
  color: var(--green-pale); position: absolute; top: 14px; right: 20px;
  -webkit-text-stroke: 1px var(--green); line-height: 1;
}
.feature_card h3 {
  font-family: var(--serif); font-size: 19px; letter-spacing: .12em;
  color: var(--green-deep); margin-bottom: 16px; line-height: 1.7;
}
.feature_card p { font-size: 14px; color: var(--ink-soft); }

/* トップ・講座カード */
.course_grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 32px); }
@media (max-width: 820px) { .course_grid { grid-template-columns: 1fr; } }
.course_card {
  background: #fff; border: 1px solid rgba(60,107,38,.14);
  display: flex; flex-direction: column;
  transition: transform .4s ease, box-shadow .4s ease;
}
.course_card:hover { transform: translateY(-6px); box-shadow: 0 18px 48px rgba(47,49,43,.12); }
.course_card_head {
  padding: 30px 28px; color: #fff;
  background: linear-gradient(135deg, var(--green-deep), var(--green));
}
.course_card:nth-child(2) .course_card_head { background: linear-gradient(135deg, #1d6e63, var(--teal)); }
.course_card:nth-child(3) .course_card_head { background: linear-gradient(135deg, #8a6f33, var(--gold)); }
.course_card_head .tag { font-size: 11px; letter-spacing: .3em; opacity: .85; }
.course_card_head h3 { font-family: var(--serif); font-size: 21px; letter-spacing: .1em; margin-top: 8px; line-height: 1.6; }
.course_card_body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.course_card_body p { font-size: 13.5px; color: var(--ink-soft); flex: 1; }
.course_card_body .more {
  margin-top: 24px; font-family: var(--serif); font-size: 13px;
  letter-spacing: .2em; color: var(--green-deep);
}
.course_card_body .more::after { content: " →"; }

/* ============================================================
   下層ページ用
   ============================================================ */
.prose h2 {
  font-family: var(--serif); font-size: clamp(21px, 2.6vw, 26px);
  letter-spacing: .12em; color: var(--green-deep);
  margin: 64px 0 24px; padding-left: 18px;
  border-left: 3px solid var(--green); line-height: 1.7;
}
.prose h2:first-child { margin-top: 0; }
.prose h3 {
  font-family: var(--serif); font-size: 18px; letter-spacing: .1em;
  margin: 40px 0 16px; color: var(--ink);
}
.prose p + p { margin-top: 1.2em; }
.prose ul { margin: 20px 0; }
.prose ul li {
  padding-left: 26px; position: relative; margin-bottom: 10px;
}
.prose ul li::before {
  content: ""; position: absolute; left: 4px; top: 14px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green); opacity: .7;
}
.prose ol { margin: 20px 0 20px 1.5em; }
.prose ol li { margin-bottom: 10px; }

.note_box {
  background: var(--green-pale); border-left: 3px solid var(--green);
  padding: 26px 30px; margin: 36px 0; font-size: 14px;
}
.note_box strong { color: var(--green-deep); }

/* 講座詳細ブロック */
.course_detail {
  background: #fff; border: 1px solid rgba(60,107,38,.14);
  margin-bottom: clamp(40px, 6vw, 64px);
}
.course_detail_head {
  padding: 36px clamp(24px, 4vw, 48px); color: #fff;
  background: linear-gradient(135deg, var(--green-deep), var(--green));
}
.course_detail:nth-of-type(2) .course_detail_head { background: linear-gradient(135deg, #1d6e63, var(--teal)); }
.course_detail:nth-of-type(3) .course_detail_head { background: linear-gradient(135deg, #8a6f33, var(--gold)); }
.course_detail_head .tag { font-size: 11px; letter-spacing: .3em; opacity: .9; }
.course_detail_head h2 {
  font-family: var(--serif); font-size: clamp(22px, 3vw, 28px);
  letter-spacing: .1em; margin-top: 10px; line-height: 1.6; font-weight: 600;
}
.course_detail_body { padding: clamp(28px, 4vw, 48px); }
.course_detail_body > p { color: var(--ink-soft); margin-bottom: 28px; }

/* 数字ステップ */
.steps { counter-reset: step; margin: 36px 0; list-style: none; }
.prose ol.steps { margin-left: 0; }
.steps li {
  counter-increment: step; position: relative;
  padding: 0 0 36px 76px;
}
.steps li:last-child { padding-bottom: 0; }
.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute; left: 0; top: -4px;
  font-family: var(--serif); font-style: italic; font-size: 26px;
  color: var(--green); width: 52px; text-align: center;
}
.steps li::after {
  content: ""; position: absolute; left: 26px; top: 40px; bottom: 8px;
  width: 1px; background: rgba(60,107,38,.25);
}
.steps li:last-child::after { display: none; }
.steps h3 { font-family: var(--serif); font-size: 17px; letter-spacing: .12em; margin-bottom: 8px; }
.steps p { font-size: 14px; color: var(--ink-soft); }

/* LINE ページ */
.line_panel {
  background: #fff; border: 1px solid rgba(60,107,38,.14);
  padding: clamp(36px, 6vw, 64px);
  text-align: center; max-width: 640px; margin: 0 auto;
}
.line_qr {
  width: 200px; height: 200px; margin: 32px auto;
  display: grid; place-items: center;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
}
.line_qr img { display: block; width: 100%; height: 100%; object-fit: contain; }
.line_merits { text-align: left; margin: 36px auto 0; max-width: 440px; }
.line_merits li {
  padding: 14px 0 14px 38px; position: relative;
  border-bottom: 1px dashed rgba(60,107,38,.2); font-size: 14px;
}
.line_merits li::before {
  content: "✓"; position: absolute; left: 6px; top: 14px;
  color: var(--line-green); font-weight: 700;
}

/* 講座ページ：価格・カリキュラム */
.price_now {
  font-family: var(--serif);
  font-size: 26px;
  color: var(--green-deep);
  letter-spacing: .06em;
}
.curr_title {
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: .16em;
  color: var(--green-deep);
  margin: 36px 0 8px;
  padding-left: 14px;
  border-left: 3px solid var(--green);
}
.course_detail_head .head_sub {
  display: inline-block;
  font-size: 14px;
  opacity: .85;
  margin-left: 6px;
  letter-spacing: .06em;
}