/* ============================================================
   planC — planAの構成 × planBのデザイン
   内容：感情的コピー・痛み→解決・01〜05番号特長・比較表・FAQ
   見た目：白ベース・グリーンアクセント・クリーン
   ============================================================ */

:root {
  --bg:          #f5faf7;
  --bg-white:    #ffffff;
  --bg-navy:     #0f2a1e;
  --green:       #1cb87a;
  --green-dark:  #13915f;
  --green-lt:    #e6f7f0;
  --green-glow:  rgba(28,184,122,.2);
  --text:        #192820;
  --muted:       #5a7060;
  --border:      rgba(15,42,30,.1);
  --radius:      18px;
  --radius-sm:   10px;
  --shadow-sm:   0 4px 16px rgba(15,42,30,.07);
  --shadow:      0 12px 40px rgba(15,42,30,.11);
  --shadow-lg:   0 24px 64px rgba(15,42,30,.15);
}

/* ---- BASE ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans JP", "Plus Jakarta Sans", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ---- ANIMATION ---- */
.anim {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .6s ease, transform .6s ease;
}
.anim--on { opacity: 1; transform: none; }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 52px; padding: 0 28px; border-radius: 999px;
  font-weight: 700; font-size: 1rem;
  transition: transform .2s, box-shadow .2s, background .2s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-green {
  background: var(--green);
  color: #fff;
  box-shadow: 0 6px 24px var(--green-glow);
}
.btn-green:hover { background: var(--green-dark); box-shadow: 0 10px 32px rgba(28,184,122,.32); }
.btn-red {
  background: #e03131;
  color: #fff;
  box-shadow: 0 6px 24px rgba(224,49,49,.25);
}
.btn-red:hover { background: #c92a2a; box-shadow: 0 10px 32px rgba(224,49,49,.38); }
.btn-amazon {
  background: #FF9900;
  color: #111111;
  box-shadow: 0 6px 24px rgba(255,153,0,.3);
}
.btn-amazon:hover { background: #e68900; box-shadow: 0 10px 32px rgba(255,153,0,.42); }
.btn-outline {
  border: 2px solid var(--border);
  color: var(--text); background: #fff;
}
.btn-outline:hover { border-color: var(--green); color: var(--green); }
.btn-lg  { height: 60px; padding: 0 36px; font-size: 1.05rem; }
.btn-xl  { height: 68px; padding: 0 48px; font-size: 1.1rem; }
.btn-full { width: 100%; }

/* ---- HEADER ---- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(245,250,247,.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 24px;
  height: 84px; display: flex; align-items: center; gap: 20px;
}
.logo {
  display: flex; align-items: center; flex-shrink: 0;
}
.logo-img {
  height: 62px;
  width: auto;
}
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a { font-size: .9rem; color: var(--muted); font-weight: 500; transition: color .18s; }
.nav a:hover { color: var(--green-dark); }
.header-btn {
  margin-left: 8px; flex-shrink: 0;
  background: #e03131; color: #fff;
  font-weight: 700; font-size: .9rem;
  height: 40px; padding: 0 18px; border-radius: 999px;
  display: inline-flex; align-items: center;
  box-shadow: 0 4px 14px rgba(224,49,49,.25);
  transition: transform .18s, box-shadow .18s;
}
.header-btn:hover { transform: translateY(-1px); background: #c92a2a; box-shadow: 0 6px 20px rgba(224,49,49,.38); }

/* ---- SECTION HELPERS ---- */
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.sec-tag {
  display: inline-block;
  font-size: 1.08rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--green-dark); background: var(--green-lt);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 16px;
}
.sec-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900; line-height: 1.2; letter-spacing: -.025em;
}
.sec-title em { font-style: normal; color: var(--green-dark); }
.sec-desc { font-size: 1rem; color: var(--muted); line-height: 1.85; margin-top: 14px; }


/* ====================================================
   HERO
   ==================================================== */
.hero {
  padding: 80px 24px 0;
  background: linear-gradient(180deg, #fff 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.hero-inner {
  max-width: 1120px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 380px;
  gap: 60px; align-items: flex-end;
}
.hero-copy { padding-bottom: 80px; }
.hero-kicker {
  font-size: 1rem; font-weight: 700; color: var(--green-dark);
  display: flex; align-items: center; gap: 8px; margin-bottom: 22px;
}
.hero-kicker::before {
  content: ""; width: 20px; height: 3px;
  background: var(--green); border-radius: 2px; flex-shrink: 0;
}
.hero-h1 {
  font-size: clamp(2.6rem, 5.5vw, 4.2rem);
  font-weight: 900; line-height: 1.1; letter-spacing: -.035em;
  margin-bottom: 22px;
}
.hero-h1 .hl {
  color: var(--green-dark); position: relative; display: inline-block;
}
.hero-h1 .hl::after {
  content: ""; position: absolute; bottom: 3px; left: 0; right: 0;
  height: 7px; background: rgba(28,184,122,.28); border-radius: 4px; z-index: -1;
}
.hero-desc { font-size: 1.02rem; color: var(--muted); line-height: 1.85; max-width: 500px; margin-bottom: 28px; }
.hero-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 36px; }
.chip {
  font-size: .82rem; font-weight: 700;
  padding: 6px 14px; border-radius: 999px;
  background: var(--green-lt); color: var(--green-dark);
  border: 1px solid rgba(28,184,122,.25);
}
.chip-orange { background: #fff3e0; color: #b05000; border-color: rgba(176,80,0,.2); }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* Hero phone visual */
.hero-visual {
  display: flex; align-items: flex-end; justify-content: center;
  gap: 0; position: relative;
}
.phone-frame {
  border-radius: 38px; border: 7px solid #dde8e2;
  background: #fff; overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.phone-frame img { width: 100%; display: block; }
.phone-main { width: 200px; position: relative; z-index: 2; }
.phone-back {
  width: 158px; margin-left: -22px; opacity: .85;
  filter: drop-shadow(-6px 8px 20px rgba(15,42,30,.16));
}


/* ====================================================
   STATS BAR (planBから引き継ぎ)
   ==================================================== */
.stats-bar { background: var(--bg-navy); padding: 28px 24px; }
.stats-bar-inner {
  max-width: 1120px; margin: 0 auto;
  display: flex; justify-content: space-between; gap: 20px;
}
.stat-item { text-align: center; flex: 1; }
.stat-num {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800;
  letter-spacing: -.04em; color: var(--green); line-height: 1; margin-bottom: 6px;
}
.stat-label { font-size: .78rem; color: rgba(255,255,255,.5); font-weight: 500; }
.stat-divider { width: 1px; background: rgba(255,255,255,.1); }


/* ====================================================
   PAIN（planAの構成 × planBのデザイン）
   ==================================================== */
.pain { padding: 96px 24px; background: var(--bg-white); border-bottom: 1px solid var(--border); }
.pain .sec-title { margin-bottom: 48px; }
.pain-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.pain-card {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; background: var(--bg);
  position: relative; overflow: hidden;
  transition: box-shadow .2s, transform .2s;
}
.pain-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, #f87171, #fb923c);
}
.pain-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.pain-emoji { font-size: 2rem; display: block; margin-bottom: 16px; }
.pain-card h3 { font-size: 1rem; font-weight: 800; margin-bottom: 10px; line-height: 1.45; }
.pain-card p  { font-size: 1rem; color: var(--muted); line-height: 1.8; }

/* Bridge text between pain and features */
.pain-bridge {
  text-align: center; padding: 40px 24px 0;
}
.pain-bridge-arrow { font-size: 2rem; color: var(--green); line-height: 1; margin-bottom: 12px; }
.pain-bridge p { font-size: 1.05rem; font-weight: 700; color: var(--green-dark); }


/* ====================================================
   STORY
   ==================================================== */
.story {
  padding: 96px 24px;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
}
.story-inner {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 72px;
  align-items: start;
}
.story-lead .sec-title {
  margin-top: 8px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}
.story-blocks {
  display: flex;
  flex-direction: column;
  gap: 36px;
}
.story-block h3 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--green-dark);
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--green);
  line-height: 1.5;
}
.story-block p {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.95;
}
.story-block p + p { margin-top: 12px; }
.story-em {
  color: var(--green-dark);
  font-weight: 800;
}

/* ====================================================
   FEATURES（planAの01〜05番号 × planBのクリーンデザイン）
   ==================================================== */
.features { padding: 96px 24px; }
.features-head { margin-bottom: 72px; }
.feature-list { display: flex; flex-direction: column; gap: 0; }

.feat-row {
  display: grid;
  grid-template-columns: 80px 1fr 280px;
  gap: 48px; align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--border);
}
.feat-row:first-child { border-top: 1px solid var(--border); }
.feat-row--rev { grid-template-columns: 80px 280px 1fr; }
.feat-row--rev .feat-img { order: 1; }
.feat-row--rev .feat-num-col { order: 0; }
.feat-row--rev .feat-body { order: 2; }

/* planAから：大きい番号 */
.feat-num-col {
  display: flex; align-items: flex-start; justify-content: center;
}
.feat-num {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: 5rem; font-weight: 900; line-height: 1;
  letter-spacing: -.06em;
  color: transparent;
  -webkit-text-stroke: 2px rgba(28,184,122,.35);
  user-select: none;
}

/* planBから：クリーンなテキストスタイル */
.feat-body {}
.feat-tag {
  font-size: 1rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--green); margin-bottom: 10px; display: block;
}
.feat-body h3 {
  font-size: 1.35rem; font-weight: 800; margin-bottom: 14px; line-height: 1.35;
}
.feat-body p { font-size: 1rem; color: var(--muted); line-height: 1.85; }

/* planBから：カード型スクリーンショット */
.feat-img img {
  border-radius: 24px;
  border: 6px solid #dde8e2;
  box-shadow: var(--shadow);
  width: 100%;
}
.feat-img--free {
  display: flex; align-items: center; justify-content: center;
}
.free-ring {
  width: 200px; height: 200px; border-radius: 50%;
  border: 3px solid rgba(28,184,122,.3);
  background: radial-gradient(circle, var(--green-lt), var(--bg));
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  box-shadow: 0 0 48px var(--green-glow);
}
.free-ring .ring-num {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: 3.4rem; font-weight: 900; letter-spacing: -.05em; line-height: 1;
  color: var(--green-dark);
}
.free-ring .ring-label { font-size: .78rem; color: var(--muted); margin-top: 8px; font-weight: 700; line-height: 1.5; }


/* ====================================================
   SCREENS（planBのグリッド）
   ==================================================== */
.screens { padding: 96px 24px; background: var(--bg-white); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.screens-head { margin-bottom: 48px; }
.screens-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.screen-item {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); background: var(--bg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow .2s, transform .2s;
}
.screen-item:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.screen-item img { width: 100%; }
.screen-item figcaption { padding: 14px 16px; font-size: .82rem; color: var(--muted); font-weight: 500; line-height: 1.5; }


/* ====================================================
   HOW TO START（planAの3ステップ × planBの丸数字カード）
   ==================================================== */
.howto { padding: 96px 24px; }
.howto-head { margin-bottom: 56px; }
.steps {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin-bottom: 52px; position: relative;
}
.steps::before {
  content: "";
  position: absolute; top: 40px; left: calc(16.66% + 24px); right: calc(16.66% + 24px);
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--green) 0, var(--green) 8px, transparent 8px, transparent 18px);
  z-index: 0;
}
.step-card {
  background: var(--bg-white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 24px;
  box-shadow: var(--shadow-sm); text-align: center; position: relative; z-index: 1;
  transition: box-shadow .2s, transform .2s;
}
.step-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.step-num {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--green); color: #fff;
  font-family: "Plus Jakarta Sans", sans-serif; font-weight: 900; font-size: 1.4rem;
  display: grid; place-items: center; margin: 0 auto 20px;
  box-shadow: 0 6px 20px var(--green-glow);
}
.step-card h3 { font-size: 1.05rem; font-weight: 800; margin-bottom: 10px; }
.step-card p  { font-size: 1rem; color: var(--muted); line-height: 1.8; }
.howto-cta { text-align: center; }


/* ====================================================
   COMPARISON（planBから引き継ぎ、planAのコピーで強化）
   ==================================================== */
.compare { padding: 96px 24px; background: var(--bg-white); border-top: 1px solid var(--border); }
.compare-head { text-align: center; margin-bottom: 48px; }
.compare-table {
  max-width: 820px; margin: 0 auto;
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background: var(--bg-white);
  box-shadow: var(--shadow-sm);
}
.cmp-head {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr;
  background: var(--bg-navy); padding: 16px 24px;
  font-size: .8rem; font-weight: 700;
}
.cmp-head span:first-child { color: rgba(255,255,255,.4); }
.cmp-col-no  { color: rgba(255,255,255,.55); text-align: center; }
.cmp-col-yes { color: var(--green); text-align: center; }
.cmp-row {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr;
  padding: 16px 24px; align-items: center;
  border-top: 1px solid var(--border); font-size: .9rem;
}
.cmp-row:nth-child(even) { background: var(--bg); }
.cmp-label  { font-weight: 700; }
.cmp-no  { text-align: center; color: #ef4444; font-size: .85rem; }
.cmp-yes { text-align: center; color: var(--green-dark); font-weight: 700; font-size: .85rem; }


/* ====================================================
   TEXTBOOKS（対応教材）
   ==================================================== */
.textbooks {
  padding: 96px 24px;
  background: var(--bg-white);
  border-top: 1px solid var(--border);
}
.textbooks-head { margin-bottom: 56px; }

.textbook-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 24px; margin-bottom: 48px;
}
.textbook-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  position: relative; overflow: hidden;
}
.textbook-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--green);
}
.textbook-badge {
  display: inline-block;
  font-size: .72rem; font-weight: 700; letter-spacing: .1em;
  color: var(--green-dark); background: var(--green-lt);
  padding: 4px 12px; border-radius: 999px; margin-bottom: 14px;
}
.textbook-name {
  font-size: 1.2rem; font-weight: 900; line-height: 1.4;
  margin-bottom: 12px; letter-spacing: -.02em;
}
.textbook-desc {
  font-size: 1rem; color: var(--muted); line-height: 1.8;
  margin-bottom: 18px;
}
.textbook-levels {
  list-style: none; display: flex; flex-direction: column; gap: 7px;
  border-top: 1px solid var(--border); padding-top: 16px;
}
.textbook-levels li {
  font-size: 1rem; color: var(--text); font-weight: 500;
  display: flex; align-items: center; gap: 9px; line-height: 1.5;
}
.textbook-levels li::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--green); flex-shrink: 0;
}

.textbooks-cta { text-align: center; }
.textbooks-cta-note {
  font-size: 1rem; color: var(--muted); margin-bottom: 16px;
}
.textbooks-cta-btns {
  display: flex; justify-content: center; gap: 12px; flex-wrap: wrap;
}


/* ====================================================
   FAQ（planAの構成 × planBのスタイル）
   ==================================================== */
.faq { padding: 96px 24px; border-top: 1px solid var(--border); }
.faq-head { margin-bottom: 40px; text-align: center; }
.faq-list { max-width: 740px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: var(--bg-white); border: 1px solid var(--border);
  border-radius: var(--radius-sm); overflow: hidden;
}
.faq-item summary {
  padding: 20px 22px; cursor: pointer;
  font-weight: 700; font-size: 1rem;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-icon {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
  background: var(--green-lt); color: var(--green-dark);
  display: grid; place-items: center;
  font-size: .95rem; font-weight: 700;
  transition: background .2s, transform .25s;
}
.faq-item[open] .faq-icon { background: var(--green); color: #fff; transform: rotate(45deg); }
.faq-body { overflow: hidden; }
.faq-body > p { padding: 0 22px 20px; font-size: 1rem; color: var(--muted); line-height: 1.85; }


/* ====================================================
   FINAL CTA（planAの感情的コピー × planBのダーク背景）
   ==================================================== */
.cta-final {
  padding: 112px 24px;
  background: linear-gradient(160deg, var(--bg-navy) 0%, #0f2a1e 60%, #173d2b 100%);
  text-align: center; position: relative; overflow: hidden;
}
.cta-final::before {
  content: "";
  position: absolute; top: -60px; left: 50%; transform: translateX(-50%);
  width: 700px; height: 500px;
  background: radial-gradient(circle, rgba(28,184,122,.18) 0%, transparent 65%);
  pointer-events: none;
}
.cta-inner { max-width: 720px; margin: 0 auto; position: relative; }
.cta-tag {
  font-size: .72rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--green); margin-bottom: 20px; display: block;
}
.cta-final h2 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 900; line-height: 1.2; letter-spacing: -.03em;
  color: #fff; margin-bottom: 18px;
}
.cta-final p { font-size: 1rem; color: rgba(255,255,255,.5); line-height: 1.85; margin-bottom: 40px; }
.cta-note {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .82rem; color: rgba(255,255,255,.4); margin-top: 18px;
}
.cta-note::before { content: "✓"; color: var(--green); font-weight: 700; }


/* ====================================================
   FOOTER
   ==================================================== */
.share-row {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; margin-top: 28px;
}
.share-label {
  font-size: .8rem; color: rgba(255,255,255,.4);
}
.btn-share-x {
  display: inline-flex; align-items: center; gap: 7px;
  height: 42px; padding: 0 20px; border-radius: 999px;
  background: #000; color: #fff;
  font-weight: 700; font-size: 1rem;
  border: 1px solid rgba(255,255,255,.2);
  transition: transform .18s, background .18s;
}
.btn-share-x:hover { background: #1a1a1a; transform: translateY(-2px); }
.x-icon {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-weight: 900; font-size: 1rem; line-height: 1;
}

.google-note {
  display: flex; align-items: center; gap: 7px;
  font-size: .82rem; color: var(--muted);
  margin-top: 12px; line-height: 1.6;
}
.google-note-g {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 50%;
  background: #4285F4; color: #fff;
  font-size: .7rem; font-weight: 800; flex-shrink: 0;
  font-family: "Plus Jakarta Sans", sans-serif; letter-spacing: 0;
}

.footer { padding: 24px; border-top: 1px solid var(--border); background: var(--bg-white); }
.footer-inner {
  max-width: 1120px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  font-size: .82rem; color: var(--muted); gap: 16px; flex-wrap: wrap;
}
.footer-inner a { color: var(--muted); transition: color .18s; }
.footer-inner a:hover { color: var(--green-dark); }
.footer-company { display: flex; align-items: center; gap: 8px; font-size: .78rem; }
.footer-company span { color: var(--border); }


/* ====================================================
   SCREENS TEASER（index.html → howtouse.html への導線）
   ==================================================== */
.screens-teaser {
  padding: 96px 24px;
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.teaser-inner {
  display: grid; grid-template-columns: 1fr 360px;
  gap: 60px; align-items: center;
}
.teaser-copy .sec-tag { margin-bottom: 16px; }
.teaser-copy .sec-title { margin-bottom: 14px; }
.teaser-btn { margin-top: 28px; }

/* 3枚重ねスマホプレビュー */
.teaser-previews {
  position: relative; height: 340px;
}
.teaser-phone {
  position: absolute;
  border-radius: 28px; border: 5px solid #dde8e2;
  overflow: hidden; background: #fff;
  box-shadow: var(--shadow);
}
.teaser-phone img { width: 100%; display: block; }
.teaser-phone--back  { width: 150px; top: 0;   left: 80px; opacity: .6; transform: rotate(6deg);  z-index: 1; }
.teaser-phone--mid   { width: 155px; top: 20px; left: 40px; opacity: .82; transform: rotate(-2deg); z-index: 2; }
.teaser-phone--front { width: 170px; top: 30px; left: 0;    z-index: 3; }


/* ====================================================
   howtouse.html 専用スタイル
   ==================================================== */

/* ページヒーロー */
.howto-hero {
  padding: 72px 24px 64px;
  background: linear-gradient(180deg, #fff 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.howto-hero .sec-tag { margin-bottom: 16px; }
.howto-hero .sec-title { max-width: 600px; margin: 0 auto 16px; }
.howto-hero .sec-desc { max-width: 560px; margin: 0 auto 32px; }
.howto-hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* 目次ナビ */
.howto-toc {
  background: var(--bg-navy); padding: 20px 24px;
}
.howto-toc-inner {
  max-width: 1120px; margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center;
}
.toc-label { font-size: .72rem; color: rgba(255,255,255,.4); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; margin-right: 8px; flex-shrink: 0; }
.toc-link {
  font-size: .84rem; font-weight: 600;
  color: rgba(255,255,255,.6);
  padding: 5px 12px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.12);
  transition: color .18s, border-color .18s, background .18s;
}
.toc-link:hover { color: #fff; border-color: rgba(255,255,255,.3); background: rgba(255,255,255,.07); }

/* 機能セクション共通 */
.howto-section { padding: 80px 24px; border-bottom: 1px solid var(--border); }
.howto-section:nth-child(even) { background: var(--bg-white); }
.howto-section:nth-child(odd)  { background: var(--bg); }

.howto-section-head { margin-bottom: 48px; }
.howto-section-num {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: .72rem; font-weight: 800; letter-spacing: .14em;
  color: var(--green); margin-bottom: 8px; display: block;
}

/* 画面カード（スクリーンショット + 説明） */
.screen-duo {
  display: grid; grid-template-columns: 260px 1fr;
  gap: 48px; align-items: flex-start;
}
.screen-duo--rev { grid-template-columns: 1fr 260px; }
.screen-duo--rev .screen-shot { order: 2; }
.screen-duo--rev .screen-desc { order: 1; }

.screen-shot {
  border-radius: 28px; border: 6px solid #dde8e2;
  overflow: hidden; background: #fff;
  box-shadow: var(--shadow);
  flex-shrink: 0;
}
.screen-shot img { width: 100%; display: block; }

.screen-desc { padding-top: 8px; }
.screen-title { font-size: 1.3rem; font-weight: 800; margin-bottom: 12px; line-height: 1.35; }
.screen-lead  { font-size: 1rem; color: var(--muted); line-height: 1.85; margin-bottom: 20px; }

/* 操作ポイントリスト */
.screen-points { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.screen-points li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: .9rem; line-height: 1.7;
}
.screen-points li::before {
  content: "✓"; flex-shrink: 0;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--green-lt); color: var(--green-dark);
  display: grid; place-items: center;
  font-size: .72rem; font-weight: 800; margin-top: 2px;
}

/* 並列2画面レイアウト — 画像幅を390px以下に抑えてぼやけを防止 */
.screen-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 380px));
  justify-content: center;
  gap: 32px; align-items: flex-start;
}
.screen-pair-item { display: flex; flex-direction: column; gap: 20px; }
.screen-pair-shot {
  border-radius: 24px; border: 6px solid #dde8e2;
  overflow: hidden; background: #fff;
  box-shadow: var(--shadow);
}
.screen-pair-shot img { width: 100%; display: block; }
.screen-pair-body {}
.screen-pair-title { font-size: 1.05rem; font-weight: 800; margin-bottom: 0; }
.screen-pair-desc { font-size: 1rem; color: var(--muted); line-height: 1.8; }

/* screen-block: 見出しを画像の上に出すラッパー */
.screen-block > .screen-title { margin-bottom: 20px; }

/* ポイントボックス（緑枠の補足説明） */
.point-box {
  margin-top: 24px; padding: 16px 20px;
  background: var(--green-lt); border-radius: var(--radius-sm);
  border-left: 3px solid var(--green);
}
.point-box__label {
  font-size: 1rem; color: var(--green-dark); font-weight: 700; margin-bottom: 4px;
}
.point-box__body {
  font-size: 1rem; color: var(--muted); line-height: 1.75;
}

/* 設定セクション：ダイアログ画像とテキストの横並びグリッド */
.dialog-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: flex-start;
  margin-top: 24px;
}

/* セクション内の区切り */
.subsec-divider {
  border: none; border-top: 1px dashed var(--border);
  margin: 56px 0;
}

/* ダイアログ・モーダル画像（横長） */
.dialog-wrap {
  margin-top: 32px;
}
.dialog-shot {
  max-width: 560px; width: 100%;
  border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: block;
}

/* PWAインストール手順 */
.pwa-steps {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
  margin-top: 32px;
}
.pwa-card {
  background: var(--bg-white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow-sm);
}
.pwa-card-os {
  font-size: .72rem; font-weight: 700; letter-spacing: .08em;
  font-family: "Noto Sans JP", sans-serif;
  color: var(--green); margin-bottom: 12px; display: block;
}
.pwa-card h3 { font-size: 1rem; font-weight: 800; margin-bottom: 14px; }
.pwa-card ol { padding-left: 20px; display: flex; flex-direction: column; gap: 8px; }
.pwa-card ol li { font-size: 1rem; color: var(--muted); line-height: 1.75; }
.pwa-card ol li strong { color: var(--text); }
.pwa-note {
  margin-top: 20px; padding: 14px 16px;
  background: var(--green-lt); border-radius: var(--radius-sm);
  font-size: .82rem; color: var(--green-dark); line-height: 1.7;
}

/* 戻るリンク / 下部CTA */
.howto-bottom-cta {
  padding: 80px 24px;
  background: linear-gradient(160deg, var(--bg-navy) 0%, #0f2a1e 60%, #173d2b 100%);
  text-align: center; position: relative; overflow: hidden;
}
.howto-bottom-cta::before {
  content: "";
  position: absolute; top: -60px; left: 50%; transform: translateX(-50%);
  width: 700px; height: 500px;
  background: radial-gradient(circle, rgba(28,184,122,.16) 0%, transparent 65%);
  pointer-events: none;
}
.howto-bottom-inner { max-width: 640px; margin: 0 auto; position: relative; }
.howto-bottom-cta h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 900; line-height: 1.25; letter-spacing: -.025em;
  color: #fff; margin-bottom: 16px;
}
.howto-bottom-cta p { font-size: 1rem; color: rgba(255,255,255,.5); line-height: 1.85; margin-bottom: 32px; }
.howto-bottom-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn-white {
  background: #fff; color: var(--text);
  box-shadow: 0 4px 16px rgba(0,0,0,.12);
}
.btn-white:hover { background: var(--bg); }
.howto-back-note { font-size: .82rem; color: rgba(255,255,255,.35); margin-top: 20px; }
.howto-back-note a { color: rgba(255,255,255,.5); text-decoration: underline; }


/* ====================================================
   PC REDIRECT MODAL
   ==================================================== */
.pc-modal-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,.52);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  opacity: 0;
  transition: opacity .25s ease;
  overflow-y: auto;
}
.pc-modal-overlay.is-visible { opacity: 1; }
.pc-modal-overlay[hidden] { display: none; }

.pc-modal {
  background: #fff; border-radius: 20px;
  padding: 40px 36px;
  max-width: 460px; width: 100%;
  position: relative;
  box-shadow: 0 24px 64px rgba(0,0,0,.22);
  text-align: center;
  transform: translateY(20px);
  transition: transform .25s ease;
}
.pc-modal-overlay.is-visible .pc-modal { transform: none; }

.pc-modal-close {
  position: absolute; top: 14px; right: 14px;
  width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg); cursor: pointer;
  display: grid; place-items: center;
  font-size: 1.1rem; color: var(--muted); line-height: 1;
  transition: background .18s, color .18s;
}
.pc-modal-close:hover { background: #fee2e2; color: #dc2626; }

.pc-modal-badge {
  display: inline-block;
  font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: #92400e; background: #fef3c7;
  padding: 4px 12px; border-radius: 999px;
  margin-bottom: 18px;
}
.pc-modal h3 {
  font-size: 1.15rem; font-weight: 900; line-height: 1.4;
  margin-bottom: 12px; letter-spacing: -.02em;
}
.pc-modal-desc {
  font-size: 1rem; color: var(--muted); line-height: 1.85;
  margin-bottom: 24px;
}
.pc-modal-qr {
  display: flex; flex-direction: column; align-items: center;
  gap: 10px; margin-bottom: 24px;
}
/* qrcodejs は div 内に canvas と img を生成する */
#pc-modal-qr-canvas {
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 10px;
  background: #fff;
  line-height: 0;
  display: inline-block;
}
#pc-modal-qr-canvas canvas,
#pc-modal-qr-canvas img {
  display: block;
  border-radius: 4px;
}
.pc-modal-qr-label {
  font-size: .82rem; color: var(--muted); line-height: 1.7;
}
.pc-modal-qr-label strong { color: var(--text); }
.pc-modal-actions {
  display: flex; flex-direction: column; gap: 10px;
}


/* ====================================================
   RESPONSIVE
   ==================================================== */
@media (max-width: 1000px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-copy { padding-bottom: 48px; }
  .hero-visual { justify-content: flex-start; }
  .feat-row, .feat-row--rev {
    grid-template-columns: 60px 1fr;
    gap: 24px;
  }
  .feat-img { display: none; }
  .feat-row--rev .feat-body { order: 2; }
  .feat-row--rev .feat-img  { order: 2; }
  .steps::before { display: none; }
}

@media (max-width: 768px) {
  .logo-img { height: 46px; }
  .nav { display: none; }
  .header-btn { margin-left: auto; }
  .sec-tag { font-size: .79rem; }
  .story-inner { grid-template-columns: 1fr; gap: 28px; }
  .hero { padding: 56px 20px 0; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }
  .pain-grid { grid-template-columns: 1fr; }
  .stats-bar-inner { flex-wrap: wrap; justify-content: center; gap: 24px 40px; }
  .stat-divider { display: none; }
  .steps { grid-template-columns: 1fr; }
  .cmp-head, .cmp-row { grid-template-columns: 1.6fr 1fr 1fr; }
  .pain, .features, .howto, .compare, .faq, .textbooks, .cta-final { padding: 64px 20px; }
  .textbook-grid { grid-template-columns: 1fr; }
  .feat-row, .feat-row--rev {
    padding: 40px 0;
    grid-template-columns: 48px 1fr;
    gap: 16px;
  }
  .feat-num { font-size: 3.5rem; -webkit-text-stroke-width: 1.5px; }
  .feat-body h3 { font-size: 1.15rem; }

  /* screens teaser */
  .screens-teaser { padding: 64px 20px; }
  .teaser-inner { grid-template-columns: 1fr; gap: 40px; }
  .teaser-previews { height: 240px; }
  .teaser-phone--back  { width: 110px; }
  .teaser-phone--mid   { width: 115px; }
  .teaser-phone--front { width: 130px; }

  /* howtouse */
  .howto-hero { padding: 56px 20px 48px; }
  .howto-hero-actions { flex-direction: column; align-items: stretch; }
  .howto-section { padding: 56px 20px; }
  .screen-duo, .screen-duo--rev { grid-template-columns: 1fr; }
  .screen-duo--rev .screen-shot { order: 0; }
  .screen-duo--rev .screen-desc { order: 1; }
  .screen-shot { max-width: 260px; margin: 0 auto; }
  .screen-pair { grid-template-columns: 1fr; }
  .dialog-grid { grid-template-columns: 1fr; }
  .dialog-grid .dialog-shot { max-width: 260px; margin: 16px auto 0; }
  .howto-bottom-cta { padding: 64px 20px; }
  .howto-bottom-actions { flex-direction: column; align-items: stretch; }
  .pwa-steps { grid-template-columns: 1fr; }
  .dialog-shot { max-width: 100%; }
}

@media (max-width: 520px) {
  .phone-back { display: none; }
  .footer-inner { flex-direction: column; text-align: center; }
  .cmp-head span:first-child { font-size: .72rem; }
  .teaser-previews { height: 200px; }
}

/* ========== Preview Password Gate ========== */
#pw-gate {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #f5f7f5;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .3s ease;
}
#pw-gate.pw-gate--hidden {
  opacity: 0;
  pointer-events: none;
}
#pw-gate-box {
  background: #fff;
  border-radius: 16px;
  padding: 40px 32px;
  width: min(360px, 90vw);
  box-shadow: 0 4px 24px rgba(0,0,0,.10);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
#pw-gate-logo {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--green);
  margin: 0;
}
#pw-gate-label {
  font-size: .9rem;
  color: #555;
  line-height: 1.7;
  margin: 0;
}
#pw-gate-input {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid #d0d8d4;
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  box-sizing: border-box;
  transition: border-color .2s;
}
#pw-gate-input:focus {
  border-color: var(--green);
}
#pw-gate-btn {
  width: 100%;
  padding: 13px;
  background: var(--green);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: background .2s;
}
#pw-gate-btn:hover {
  background: var(--green-dark);
}
#pw-gate-error {
  font-size: .85rem;
  color: #e03131;
  margin: 0;
}