/* ============================================================
   中古iPhone 子ども用ガイド
   Original design — warm, friendly, family-oriented
   Palette: soft cream / leaf green / warm coral / deep ink
   Type: Zen Maru Gothic (rounded display) + M PLUS 1p (body)
   ============================================================ */

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
img{max-width:100%;display:block}
svg{display:block}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
body{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
:focus-visible{outline:3px solid var(--leaf);outline-offset:3px;border-radius:4px}

:root{
  --cream:#fbf6ec;      /* page background */
  --paper:#ffffff;      /* card / panel */
  --leaf:#4a9d6e;       /* primary — leaf green */
  --leaf-dk:#2f7350;    /* darker green */
  --coral:#f08a5d;      /* warm accent */
  --ink:#37342c;        /* body text */
  --sub:#7a756a;        /* muted text */
  --line:#eae1d0;       /* hairlines on cream */
  --leaf-soft:#e8f2ea;  /* tint panel */
  --coral-soft:#fdeee4; /* tint panel */
  --foot:#37342c;       /* footer bg */
  --foot-fg:#efe9dc;
  --ff-disp:'Zen Maru Gothic', sans-serif;
  --ff-body:'M PLUS 1p', sans-serif;
  --maxw:840px;
  --radius:18px;
}

body{
  font-family:var(--ff-body);
  background:var(--cream);
  color:var(--ink);
  line-height:1.95;
  font-size:16px;
}

/* ---------- top bar ---------- */
.bar{
  position:sticky;top:0;z-index:70;
  display:flex;align-items:center;justify-content:space-between;
  height:64px;padding:0 22px;
  background:rgba(251,246,236,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--ff-disp);font-weight:700;font-size:19px;color:var(--leaf-dk)}
.brand .mark{width:30px;height:30px;flex-shrink:0}
.nav{display:flex;gap:4px}
.nav a{
  padding:8px 15px;border-radius:30px;font-size:14px;font-weight:500;
  color:var(--sub);transition:.2s;white-space:nowrap;
}
.nav a:hover{background:var(--leaf-soft);color:var(--leaf-dk)}
.nav a.active{background:var(--leaf);color:#fff}
.burger{display:none;width:44px;height:44px;background:none;border:none;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;padding:9px;color:var(--leaf-dk)}
.burger span{display:block;height:2px;background:currentColor;border-radius:2px;transition:.3s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{display:none}

@media(max-width:820px){
  .nav{display:none}
  .burger{display:flex}
  .drawer.open{display:block;position:sticky;top:64px;z-index:60;background:var(--paper);border-bottom:1px solid var(--line)}
  .drawer.open ul{padding:8px 22px 16px}
  .drawer.open li{border-top:1px solid var(--line)}
  .drawer.open a{display:block;padding:13px 4px;font-weight:500;color:var(--ink)}
  .drawer.open a.active{color:var(--leaf-dk);font-weight:700}
}

/* ---------- shared layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- home hero ---------- */
.hero{padding:64px 24px 40px;max-width:var(--maxw);margin:0 auto}
.hero-badge{
  display:inline-flex;align-items:center;gap:7px;
  background:var(--coral-soft);color:var(--coral);
  font-size:13px;font-weight:700;padding:6px 15px;border-radius:30px;margin-bottom:22px;
}
.hero h1{
  font-family:var(--ff-disp);font-weight:700;
  font-size:clamp(28px,5.6vw,44px);line-height:1.5;letter-spacing:.01em;
  margin-bottom:20px;
}
.hero h1 .hl{
  background:linear-gradient(transparent 62%, #cfe9d7 62%);
  padding:0 .1em;
}
.hero p{color:var(--sub);font-size:16.5px;max-width:56ch;line-height:2.05}
.hero-art{margin:34px auto 0;max-width:520px}

/* ---------- home: step cards ---------- */
.home-sec{max-width:var(--maxw);margin:0 auto;padding:8px 24px 20px}
.home-sec > h2{
  font-family:var(--ff-disp);font-weight:700;font-size:clamp(20px,3.4vw,26px);
  margin-bottom:8px;display:flex;align-items:center;gap:12px;
}
.home-sec > h2::before{content:"";width:26px;height:5px;border-radius:3px;background:var(--coral)}
.home-sec .sec-lead{color:var(--sub);font-size:15px;margin-bottom:26px}

.guide-list{display:grid;gap:16px}
.guide-item{
  display:grid;grid-template-columns:64px 1fr auto;gap:20px;align-items:center;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;transition:.25s;
}
.guide-item:hover{transform:translateY(-3px);box-shadow:0 16px 34px -22px rgba(74,157,110,.55);border-color:#cfe4d5}
.guide-num{
  width:54px;height:54px;border-radius:16px;
  background:var(--leaf-soft);color:var(--leaf-dk);
  font-family:var(--ff-disp);font-weight:700;font-size:22px;
  display:flex;align-items:center;justify-content:center;
}
.guide-body h3{font-family:var(--ff-disp);font-weight:700;font-size:18px;margin-bottom:5px}
.guide-body p{color:var(--sub);font-size:14px;line-height:1.75}
.guide-go{color:var(--leaf);font-size:22px;transition:.2s;flex-shrink:0}
.guide-item:hover .guide-go{transform:translateX(4px)}
@media(max-width:560px){
  .guide-item{grid-template-columns:52px 1fr;gap:16px;padding:18px}
  .guide-num{width:48px;height:48px;font-size:19px}
  .guide-go{display:none}
}

/* ---------- article (subpages) ---------- */
.article{max-width:720px;margin:0 auto;padding:52px 24px 60px}
.art-head{margin-bottom:14px}
.art-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--ff-disp);font-weight:700;font-size:13px;color:var(--leaf-dk);
  background:var(--leaf-soft);padding:5px 14px;border-radius:30px;margin-bottom:18px;
}
.art-eyebrow .n{background:var(--leaf);color:#fff;width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px}
.art-head h1{
  font-family:var(--ff-disp);font-weight:700;
  font-size:clamp(25px,4.6vw,36px);line-height:1.45;margin-bottom:14px;
}
.art-head .lead{color:var(--sub);font-size:16px;line-height:2}

.art-art{margin:26px 0 34px;background:var(--leaf-soft);border-radius:var(--radius);padding:26px}
.art-art svg{margin:0 auto;max-width:340px;width:100%}

.article h2{
  font-family:var(--ff-disp);font-weight:700;font-size:clamp(20px,3.3vw,26px);
  margin:44px 0 16px;padding-left:16px;position:relative;line-height:1.4;
}
.article h2::before{content:"";position:absolute;left:0;top:.15em;bottom:.15em;width:6px;border-radius:3px;background:var(--coral)}
.article p{margin-bottom:18px;line-height:2.05}
.article .note{
  background:var(--coral-soft);border-radius:14px;padding:20px 22px;margin:26px 0;
  font-size:15px;line-height:1.95;
}
.article .note b{color:var(--coral);font-family:var(--ff-disp)}

/* prev / next nav */
.pager{display:flex;justify-content:space-between;gap:14px;margin-top:52px;padding-top:30px;border-top:1px solid var(--line)}
.pager a{
  flex:1;max-width:48%;background:var(--paper);border:1px solid var(--line);
  border-radius:14px;padding:16px 18px;transition:.2s;
}
.pager a:hover{border-color:var(--leaf);background:var(--leaf-soft)}
.pager .dir{font-size:12px;color:var(--sub);font-weight:700}
.pager .ttl{font-family:var(--ff-disp);font-weight:700;font-size:14.5px;color:var(--ink);margin-top:3px;line-height:1.5}
.pager .next{margin-left:auto;text-align:right}
.pager .empty{visibility:hidden}
@media(max-width:520px){.pager .ttl{font-size:13px}}

/* ---------- sitemap (list) ---------- */
.sm{max-width:var(--maxw);margin:0 auto;padding:52px 24px 60px}
.sm-head{margin-bottom:34px}
.sm-head .art-eyebrow{margin-bottom:16px}
.sm-head h1{font-family:var(--ff-disp);font-weight:700;font-size:clamp(25px,4.6vw,36px);margin-bottom:12px}
.sm-head .lead{color:var(--sub);font-size:16px}
.sm-list{border-top:1px solid var(--line)}
.sm-list li{border-bottom:1px solid var(--line)}
.sm-list a{
  display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:baseline;
  padding:22px 6px;transition:.2s;
}
.sm-list a:hover{background:var(--leaf-soft);padding-left:16px;padding-right:16px;border-radius:12px}
.sm-list .sm-tag{
  font-family:var(--ff-disp);font-weight:700;font-size:13px;color:var(--leaf-dk);
  background:var(--leaf-soft);padding:3px 11px;border-radius:20px;white-space:nowrap;align-self:center;
}
.sm-list a:hover .sm-tag{background:#fff}
.sm-list .sm-txt h2{font-family:var(--ff-disp);font-weight:700;font-size:17px;margin-bottom:4px;line-height:1.5}
.sm-list .sm-txt p{color:var(--sub);font-size:14px;line-height:1.7}
.sm-list .sm-go{color:var(--leaf);font-size:18px;align-self:center}
@media(max-width:560px){
  .sm-list a{grid-template-columns:1fr auto}
  .sm-list .sm-tag{grid-column:1/-1;justify-self:start;margin-bottom:6px}
}

/* ---------- footer ---------- */
.foot{background:var(--foot);color:var(--foot-fg);margin-top:56px}
.foot-in{max-width:var(--maxw);margin:0 auto;padding:48px 24px 22px;text-align:center}
.foot .brand{justify-content:center;color:#fff;margin-bottom:8px}
.foot .brand .mark{filter:brightness(0) invert(1);opacity:.95}
.foot-tag{opacity:.65;font-size:14px;margin-bottom:24px}
.foot-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 22px;font-size:14px;margin-bottom:22px}
.foot-nav a{opacity:.8;transition:.2s}
.foot-nav a:hover{opacity:1;color:var(--coral)}
.foot-copy{font-size:12px;opacity:.5;padding-top:18px;border-top:1px solid rgba(255,255,255,.12)}

/* ---------- to top ---------- */
.to-top{
  position:fixed;right:20px;bottom:20px;width:48px;height:48px;border-radius:50%;
  background:var(--leaf);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:20px;opacity:0;pointer-events:none;transform:translateY(12px);transition:.3s;z-index:60;
  box-shadow:0 10px 24px -10px rgba(47,115,80,.7);
}
.to-top.show{opacity:1;pointer-events:auto;transform:none}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}