/* =========================================================
   ぷかぷか島日記 — stylesheet
   ほのぼの・水彩絵本テイスト（やわらかい紙／海と森のパステル）
   ========================================================= */

:root{
  --paper:        #fbf7ec;   /* クリーム色の紙 */
  --paper-2:      #f4eedd;   /* 少し濃い紙 */
  --ink:          #5a5246;   /* やわらかい墨色（純黒は使わない） */
  --ink-soft:     #8a8275;
  --sea:          #8fc2bc;   /* 海の青緑 */
  --sea-deep:     #5f9e9a;
  --sky:          #bfe0e0;
  --coral:        #e9a07c;   /* 夕やけのコーラル */
  --coral-deep:   #d98562;
  --moss:         #a7c08a;   /* 森のみどり */
  --sand:         #ecd9b5;
  --lav:          #c4b6d6;   /* 夜のラベンダー */
  --white-soft:   #fffdf8;

  --shadow:       0 10px 30px rgba(120,108,88,.14);
  --shadow-sm:    0 4px 14px rgba(120,108,88,.12);
  --radius:       26px;
  --radius-sm:    16px;

  --font-body: "Zen Maru Gothic", system-ui, sans-serif;
  --font-hand: "Yomogi", "Zen Maru Gothic", cursive;
  --font-pop:  "Hachi Maru Pop", "Zen Maru Gothic", cursive;
}

*{ box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  line-height:1.95;
  letter-spacing:.02em;
  background-color:var(--paper);
  /* やわらかい紙のテクスチャ（軽いノイズ＆斑点） */
  background-image:
    radial-gradient(circle at 20% 30%, rgba(143,194,188,.06) 0, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(233,160,124,.05) 0, transparent 45%),
    radial-gradient(rgba(170,150,120,.05) 1px, transparent 1px);
  background-size: auto, auto, 6px 6px;
}

img{ display:block; max-width:100%; }

a{ color:var(--sea-deep); text-decoration:none; }

/* ---------- ヘッダー ---------- */
.site-head{
  position:sticky; top:0; z-index:50;
  display:flex; align-items:center; justify-content:space-between;
  gap:1rem; flex-wrap:wrap;
  padding:.7rem 1.4rem;
  background:rgba(251,247,236,.86);
  backdrop-filter:blur(8px);
  border-bottom:2px dashed rgba(143,194,188,.5);
}
.brand{ display:flex; align-items:center; gap:.5rem; }
.brand-mark{ font-size:1.5rem; }
.brand-text{
  font-family:var(--font-pop);
  font-size:1.35rem; color:var(--sea-deep);
}
.site-nav{ display:flex; gap:1.3rem; flex-wrap:wrap; }
.site-nav a{
  font-weight:500; color:var(--ink-soft);
  padding:.2rem .1rem; border-bottom:2px solid transparent;
  transition:.2s;
}
.site-nav a:hover{ color:var(--sea-deep); border-color:var(--sea); }

/* ---------- ヒーロー ---------- */
.hero{ position:relative; overflow:hidden; }
.hero-img{
  width:100%; height:auto; max-height:62vh; object-fit:cover;
  object-position:center 60%;
}
.hero-overlay{
  position:absolute; inset:0;
  display:flex; flex-direction:column; justify-content:center;
  padding:0 8%;
  background:linear-gradient(90deg, rgba(251,247,236,.78) 0%, rgba(251,247,236,.35) 45%, transparent 75%);
}
.hero-title{
  font-family:var(--font-pop);
  font-size:clamp(2.1rem,5vw,3.6rem);
  color:var(--sea-deep);
  margin:0 0 .4rem;
  text-shadow:0 2px 0 var(--white-soft);
}
.hero-tagline{
  font-family:var(--font-hand);
  font-size:clamp(1rem,2.2vw,1.4rem);
  margin:0 0 .6rem; color:var(--coral-deep);
}
.hero-sub{ margin:0; max-width:30ch; color:var(--ink-soft); }

/* ---------- レイアウト ---------- */
.container{ max-width:1080px; margin:0 auto; padding:0 1.4rem; }
.container-narrow{ max-width:680px; margin:0 auto; padding:0 1.4rem; }

.section-title{
  text-align:center; margin:3.6rem 0 2rem;
  font-family:var(--font-pop); font-size:1.7rem; color:var(--sea-deep);
}
.section-title span{ position:relative; padding:0 1.6rem; }
.section-title span::before,
.section-title span::after{
  content:"〜"; color:var(--sea); position:absolute; top:0;
}
.section-title span::before{ left:-.2rem; }
.section-title span::after{ right:-.2rem; }

/* ---------- イントロ ---------- */
.intro{
  background:var(--white-soft);
  border:2px solid rgba(167,192,138,.4);
  border-radius:var(--radius);
  padding:2.2rem 2rem;
  margin:-3.4rem auto 0;
  position:relative; z-index:5;
  max-width:760px;
  box-shadow:var(--shadow);
}
.intro-lead{
  font-family:var(--font-hand);
  font-size:1.3rem; color:var(--coral-deep);
  margin:0 0 1rem; text-align:center;
}
.intro p{ margin:.7rem 0; }
.intro b{ color:var(--sea-deep); }

/* ---------- 記事カードグリッド ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(300px,1fr));
  gap:1.8rem;
}
.card{
  display:flex; flex-direction:column;
  background:var(--white-soft);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  border:1px solid rgba(170,150,120,.15);
  color:var(--ink);
  transition:transform .25s ease, box-shadow .25s ease;
}
.card:hover{ transform:translateY(-6px) rotate(-.4deg); box-shadow:var(--shadow); }
.card-img{ aspect-ratio:3/2; overflow:hidden; background:var(--sky); }
.card-img img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
.card:hover .card-img img{ transform:scale(1.05); }
.card-body{ padding:1.1rem 1.3rem 1.4rem; display:flex; flex-direction:column; gap:.5rem; flex:1; }
.card-title{ font-family:var(--font-pop); font-size:1.12rem; margin:.1rem 0 0; color:var(--ink); line-height:1.5; }
.card-lead{ font-size:.92rem; color:var(--ink-soft); margin:0; flex:1; }
.card-date{ font-size:.8rem; color:var(--sea-deep); font-weight:500; }

/* ---------- タグ ---------- */
.tag{
  align-self:flex-start;
  font-size:.74rem; font-weight:700;
  padding:.16rem .7rem; border-radius:999px;
  color:#fff; letter-spacing:.05em;
}
.tag-うみ{ background:var(--sea-deep); }
.tag-もり{ background:var(--moss); }
.tag-なかま{ background:var(--coral-deep); }
.tag-ひとりごと{ background:var(--lav); }
.tag-きせつ{ background:#d8b15e; }

/* ---------- なかま紹介 ---------- */
.cast-hero{
  max-width:620px; margin:0 auto 2.2rem;
  border-radius:var(--radius); overflow:hidden;
  box-shadow:var(--shadow); border:4px solid var(--white-soft);
}
.friend-grid{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:1.4rem; margin-bottom:1rem;
}
.friend{
  background:var(--white-soft);
  border-radius:var(--radius-sm);
  padding:1.1rem; text-align:center;
  border:1px dashed rgba(143,194,188,.6);
}
.friend-img{
  width:120px; height:120px; margin:0 auto .8rem;
  border-radius:50%; overflow:hidden;
  border:3px solid var(--sand);
  box-shadow:var(--shadow-sm);
}
.friend-img img{ width:100%; height:100%; object-fit:cover; }
.friend-name{ font-family:var(--font-pop); font-size:1.1rem; margin:.2rem 0 .5rem; color:var(--sea-deep); }
.friend-name small{ font-size:.72rem; color:var(--ink-soft); }
.friend-desc{ font-size:.88rem; color:var(--ink-soft); margin:0; text-align:left; line-height:1.85; }

/* ---------- 記事ページ ---------- */
.article-page{ background-color:var(--paper); }
.post-hero{
  max-width:900px; margin:1.6rem auto 0; padding:0 1.4rem;
}
.post-hero img{
  width:100%; border-radius:var(--radius);
  box-shadow:var(--shadow); border:4px solid var(--white-soft);
  aspect-ratio:3/2; object-fit:cover;
}
.post-head{ text-align:center; margin:1.8rem auto .6rem; }
.post-head .tag{ display:inline-block; margin-bottom:.8rem; }
.post-title{
  font-family:var(--font-pop);
  font-size:clamp(1.5rem,3.6vw,2.2rem);
  color:var(--ink); margin:.3rem 0; line-height:1.6;
}
.post-date{ color:var(--sea-deep); font-weight:500; font-size:.9rem; }

.post-body{ margin-top:1.4rem; font-size:1.04rem; }
.post-lead{
  font-family:var(--font-hand);
  font-size:1.18rem; color:var(--coral-deep);
  border-left:4px solid var(--coral); padding-left:1rem;
  margin-bottom:1.8rem;
}
.post-body p{ margin:1.3rem 0; }

/* つぶやき（哲学的な一言） */
.musing{
  margin:2.8rem 0 1rem;
  background:linear-gradient(180deg, var(--white-soft), #f3f7f3);
  border:2px dashed var(--moss);
  border-radius:var(--radius);
  padding:1.6rem 1.6rem 1.4rem;
  text-align:center;
}
.musing-label{
  display:inline-block;
  font-family:var(--font-pop); font-size:.78rem;
  color:#fff; background:var(--moss);
  padding:.2rem .9rem; border-radius:999px; margin-bottom:.8rem;
}
.musing-text{
  font-family:var(--font-hand);
  font-size:1.22rem; color:var(--sea-deep); margin:0; line-height:1.8;
}

/* 記事ナビ */
.post-nav{
  display:flex; justify-content:space-between; gap:1rem; flex-wrap:wrap;
  margin:2.6rem 0 1rem;
}
.pn{
  flex:1 1 45%;
  background:var(--white-soft); border:1px solid rgba(170,150,120,.2);
  border-radius:var(--radius-sm); padding:.8rem 1.1rem;
  font-size:.9rem; color:var(--ink); box-shadow:var(--shadow-sm);
  transition:.2s;
}
.pn:hover{ color:var(--sea-deep); transform:translateY(-2px); }
.pn-next{ text-align:right; }
.pn-disabled{ color:var(--ink-soft); opacity:.6; box-shadow:none; cursor:default; }
.back-home{ text-align:center; margin:1.6rem 0 0; }
.back-home a{ font-family:var(--font-pop); color:var(--sea-deep); }

/* ---------- フッター ---------- */
.site-foot{ margin-top:4rem; text-align:center; padding:0 1.4rem 3rem; color:var(--ink-soft); }
.wave-divider{
  height:26px; margin-bottom:1.8rem;
  background:
    radial-gradient(circle at 12px -6px, transparent 14px, var(--sea) 15px 16px, transparent 17px) repeat-x;
  background-size:24px 26px;
  opacity:.5;
}
.foot-logo{ font-family:var(--font-pop); color:var(--sea-deep); font-size:1.2rem; margin:.2rem 0; }
.foot-note{ margin:.3rem 0; }
.foot-fine{ font-size:.74rem; opacity:.7; max-width:46ch; margin:1rem auto .4rem; line-height:1.7; }
.foot-copy{ font-size:.78rem; opacity:.7; }

/* ---------- レスポンシブ ---------- */
@media (max-width:640px){
  .hero-overlay{
    background:linear-gradient(0deg, rgba(251,247,236,.92) 0%, rgba(251,247,236,.45) 60%, transparent 100%);
    justify-content:flex-end; padding-bottom:1.4rem;
  }
  .hero-img{ max-height:48vh; }
  .intro{ margin-top:-1.8rem; padding:1.6rem 1.3rem; }
  .post-nav{ flex-direction:column; }
  .pn, .pn-next{ text-align:center; }
}