/* =========================================================
   PrivaDiary ご案内ページ
   コンセプト：革表紙の手帳を開くような、静かで個人的な余白
   ========================================================= */

:root{
  --ink:        #2A1E2A;
  --plum:       #4A2545;
  --plum-deep:  #35152F;
  --paper:      #FBFAF6;
  --paper-tint: #F5EEEF;
  --gold:       #B8863B;
  --gold-soft:  #E4CE9C;
  --muted:      #7A6B75;
  --line:       #E7DEE3;

  --serif: "Shippori Mincho", "Noto Serif JP", serif;
  --sans:  "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
h1,h2,h3{ font-family:var(--serif); font-weight:600; margin:0; }
a{ color:inherit; }
.wrap{ max-width:1080px; margin:0 auto; padding:0 28px; }

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(251,250,246,.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  padding-top:16px; padding-bottom:16px;
}
.brand{ display:flex; align-items:center; gap:10px; font-family:var(--serif); font-size:1.25rem; letter-spacing:.02em;}
.brand-mark{
  width:30px; height:30px; border-radius:8px;
  background:var(--plum);
  position:relative; flex:none;
}
.brand-mark::after{
  content:"";
  position:absolute; left:50%; top:50%;
  width:11px; height:14px;
  transform:translate(-50%,-52%);
  border:1.6px solid var(--gold-soft);
  border-radius:2px;
}
.main-nav{ display:flex; gap:28px; font-size:.92rem; }
.main-nav a{ text-decoration:none; color:var(--ink); opacity:.75; }
.main-nav a:hover{ opacity:1; color:var(--plum); }

@media (max-width:720px){ .main-nav{ display:none; } }

/* ---------- Hero ---------- */
.hero{
  background:
    radial-gradient(120% 160% at 100% 0%, #5C2E55 0%, var(--plum) 45%, var(--plum-deep) 100%);
  color:#F3E9EE;
  overflow:hidden;
  position:relative;
}
.hero .wrap{
  display:grid; grid-template-columns:1.1fr .9fr; gap:56px;
  align-items:center;
  padding-top:88px; padding-bottom:96px;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:10px;
  font-size:.82rem; letter-spacing:.14em;
  color:var(--gold-soft); margin-bottom:22px;
}
.eyebrow::before, .eyebrow::after{ content:"◆"; font-size:.55rem; opacity:.8; }
.hero h1{
  font-size:clamp(1.9rem, 3.2vw, 2.55rem);
  line-height:1.6; color:#fff;
}
.hero p.lead{
  margin-top:22px; max-width:46ch;
  color:#E6D7E1; font-size:1rem;
}
.hero-badges{ display:flex; gap:10px; flex-wrap:wrap; margin-top:32px; }
.badge{
  font-size:.78rem; padding:7px 14px; border-radius:999px;
  border:1px solid rgba(228,206,156,.45); color:var(--gold-soft);
}

/* phone frame */
.phone{
  position:relative; justify-self:center;
  width:min(280px, 82%);
  border-radius:34px;
  background:#1c1420;
  padding:12px 12px 16px;
  box-shadow:0 30px 60px -20px rgba(0,0,0,.55), 0 0 0 1px rgba(255,255,255,.04);
}
.phone::before{
  content:""; position:absolute; top:22px; left:50%; transform:translateX(-50%);
  width:46px; height:5px; border-radius:4px; background:rgba(255,255,255,.18);
}
.phone img{ border-radius:20px; }

/* ---------- Section scaffolding ---------- */
section{ padding:92px 0; }
.section-tint{ background:var(--paper-tint); }
.kicker{
  font-size:.8rem; letter-spacing:.16em; color:var(--gold);
  display:flex; align-items:center; gap:10px; margin-bottom:14px;
}
.kicker .num{
  font-family:var(--serif); font-style:italic; color:var(--plum); opacity:.55; font-size:.95rem;
}
.section-head{ max-width:640px; margin-bottom:56px; }
.section-head h2{ font-size:clamp(1.5rem,2.4vw,1.9rem); color:var(--plum-deep); }
.section-head p{ color:var(--muted); margin-top:14px; font-size:.98rem; }

/* ---------- Tab card (シグネチャー: LIFEモードの◀タブ▶をモチーフに) ---------- */
.tab-card{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  padding:44px 40px;
}
.tab-card::before{
  content:attr(data-tab);
  position:absolute; top:-15px; left:36px;
  background:var(--plum); color:#F3E9EE;
  font-family:var(--serif); font-size:.86rem; letter-spacing:.06em;
  padding:7px 20px; border-radius:999px;
  box-shadow:0 8px 18px -8px rgba(74,37,69,.55);
}
.feature{
  display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center;
  margin-bottom:34px;
}
.feature.reverse .feature-media{ order:2; }
.feature.reverse .feature-copy{ order:1; }
.feature-copy h3{ font-size:1.25rem; color:var(--plum-deep); margin-bottom:16px; }
.feature-copy ul{ margin:18px 0 0; padding:0; list-style:none; }
.feature-copy li{
  position:relative; padding-left:22px; margin-bottom:11px;
  color:var(--ink); font-size:.96rem;
}
.feature-copy li::before{
  content:""; position:absolute; left:0; top:.62em;
  width:7px; height:7px; border-radius:50%; background:var(--gold);
}
.feature-media{
  background:var(--paper-tint);
  border-radius:16px; padding:22px;
  display:flex; justify-content:center;
}
.feature-media img{ border-radius:10px; box-shadow:0 18px 40px -18px rgba(53,21,47,.35); max-height:420px; width:auto; }
.feature-media.duo{
  display:flex; gap:16px; flex-wrap:wrap; width:100%;
}
.feature-media.duo img{
  flex:1 1 160px; min-width:0; max-width:100%;
  width:auto; height:auto; max-height:300px;
  object-fit:contain;
}
@media (max-width:520px){
  .feature-media.duo img{ flex-basis:100%; max-height:260px; }
}

@media (max-width:860px){
  .hero .wrap{ grid-template-columns:1fr; padding-top:64px; }
  .phone{ order:-1; }
  .feature, .feature.reverse{ grid-template-columns:1fr; }
  .feature.reverse .feature-media, .feature.reverse .feature-copy{ order:initial; }
  .tab-card{ padding:36px 22px; }
}

/* ---------- Simple grid (連絡先・お気に入り・お知らせ・＋ページ) ---------- */
.grid-3{
  display:grid; grid-template-columns:repeat(3,1fr); gap:22px;
}
.mini-card{
  background:#fff; border:1px solid var(--line); border-radius:14px; padding:28px;
}
.mini-card .icon{
  width:38px; height:38px; border-radius:10px; background:var(--paper-tint);
  display:flex; align-items:center; justify-content:center; margin-bottom:16px;
  color:var(--plum); font-family:var(--serif); font-size:1.05rem;
}
.mini-card h4{ font-family:var(--serif); font-size:1.05rem; color:var(--plum-deep); margin:0 0 10px; }
.mini-card p{ color:var(--muted); font-size:.9rem; margin:0; }
.mini-card img{ border-radius:10px; margin-top:16px; box-shadow:0 14px 30px -16px rgba(53,21,47,.3); }

@media (max-width:860px){ .grid-3{ grid-template-columns:1fr; } }

/* ---------- Footer ---------- */
.site-footer{
  background:var(--plum-deep); color:#D9C7D3;
  padding:56px 0 36px;
}
.site-footer .wrap{
  display:flex; justify-content:space-between; align-items:flex-end; gap:24px; flex-wrap:wrap;
}
.site-footer .brand{ color:#F3E9EE; }
.site-footer .brand-mark{ background:var(--gold); }
.site-footer .brand-mark::after{ border-color:var(--plum-deep); }
.foot-note{ font-size:.82rem; color:#B79EB0; max-width:44ch; }
.foot-links{ display:flex; gap:20px; font-size:.85rem; }
.foot-links a{ text-decoration:none; opacity:.85; }
.foot-links a:hover{ opacity:1; }
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.08); margin-top:36px; padding-top:20px;
  font-size:.78rem; color:#9C8398; text-align:center;
}