/* ==========================================================================
   IVY CORE BLEND — 壁面緑化・建築緑化コンサルティング
   共通スタイルシート
   ========================================================================== */

:root{
  --bg: #FAFAF7;
  --bg-soft: #EEF2EC;
  --text: #26322B;
  --accent: #365E46;
  --accent-soft: #78917B;
  --arch: #8D9690;
  --stone: #A99A80;
  --graphite: #454F4A;
  --radius: 6px;
  --max-width: 1180px;
  --shadow-sm: 0 1px 3px rgba(38,50,43,0.08);
  --shadow-md: 0 6px 24px rgba(38,50,43,0.10);
  --font: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
}

*,*::before,*::after{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin:0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.85;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a{ color: var(--accent); text-decoration: none; }
a:hover{ text-decoration: underline; }

h1,h2,h3,h4{
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
  margin: 0 0 0.6em;
}
h1{ font-size: clamp(1.8rem, 3.2vw, 2.6rem); letter-spacing: 0.02em; }
h2{ font-size: clamp(1.4rem, 2.4vw, 1.9rem); }
h3{ font-size: 1.2rem; }
p{ margin: 0 0 1em; }

ul,ol{ padding-left: 1.3em; }
li{ margin-bottom: 0.5em; }

.container{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section{ padding: 64px 0; }
.section-soft{ background: var(--bg-soft); }
.section-sm{ padding: 40px 0; }

.section-head{ max-width: 760px; margin-bottom: 36px; }
.eyebrow{
  display:inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight:700;
  background: var(--bg-soft);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

/* ---------- Header ---------- */
.site-header{
  position: sticky;
  top:0;
  z-index: 100;
  background: rgba(250,250,247,0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid #e1e6dd;
}
.header-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display:flex;
  align-items:center;
  justify-content: space-between;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--text);
}
.brand:hover{ text-decoration:none; }
.brand svg{ flex-shrink:0; }
.brand-name{ white-space: nowrap; }

nav.main-nav{ display:flex; }
nav.main-nav ul{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap: 2px;
  margin:0; padding:0;
  justify-content:flex-end;
}
nav.main-nav a{
  color: var(--text);
  font-size: 0.86rem;
  padding: 8px 10px;
  border-radius: 4px;
  display:inline-block;
}
nav.main-nav a:hover, nav.main-nav a.active{
  background: var(--bg-soft);
  color: var(--accent);
  text-decoration:none;
}
.header-cta{
  margin-left: 10px;
  background: var(--accent);
  color:#fff !important;
  padding: 8px 16px !important;
  border-radius: 999px;
  font-weight:700;
}
.header-cta:hover{ background: var(--graphite); color:#fff !important; }

.nav-toggle{
  display:none;
  background:none;
  border: 1px solid var(--arch);
  border-radius: 4px;
  width: 42px; height:42px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:"";
  display:block;
  width: 20px; height:2px;
  background: var(--text);
  position:relative;
  transition: 0.2s;
}
.nav-toggle span::before{ position:absolute; top:-6px; }
.nav-toggle span::after{ position:absolute; top:6px; }

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background: var(--bg-soft);
  overflow:hidden;
}
.hero-grid{
  max-width: var(--max-width);
  margin:0 auto;
  padding: 64px 24px;
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items:center;
}
.hero h1{ margin-bottom: 0.5em; }
.hero p.lead{ font-size:1.05rem; color: var(--graphite); max-width: 46ch; }
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-top: 24px; }
.hero-figure img{ border-radius: var(--radius); box-shadow: var(--shadow-md); }
.hero-figure figcaption{ font-size:0.78rem; color: var(--arch); margin-top:8px; }

.page-hero{
  background: var(--bg-soft);
  padding: 52px 0 40px;
  border-bottom: 1px solid #e1e6dd;
}
.page-hero .eyebrow{ background:#fff; }
.page-hero p.lead{ max-width:70ch; color: var(--graphite); font-size:1.02rem; }
.breadcrumb{ font-size:0.8rem; color: var(--arch); margin-bottom: 14px; }
.breadcrumb a{ color: var(--arch); }

/* ---------- Buttons ---------- */
.btn{
  display:inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight:700;
  font-size:0.92rem;
  cursor:pointer;
  border: 1px solid transparent;
}
.btn-primary{ background: var(--accent); color:#fff; }
.btn-primary:hover{ background: var(--graphite); text-decoration:none; color:#fff;}
.btn-outline{ background:transparent; border-color: var(--accent); color: var(--accent); }
.btn-outline:hover{ background: var(--accent); color:#fff; text-decoration:none; }
.btn-block{ display:block; width:100%; text-align:center; }

/* ---------- Cards / Grids ---------- */
.grid{ display:grid; gap: 22px; }
.grid-2{ grid-template-columns: repeat(2,1fr); }
.grid-3{ grid-template-columns: repeat(3,1fr); }
.grid-4{ grid-template-columns: repeat(4,1fr); }

.card{
  background:#fff;
  border: 1px solid #e6e9e3;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.card h3{ color: var(--accent); margin-bottom:0.5em; }
.card img{ border-radius: var(--radius); margin-bottom:14px; }
.card .tag{
  display:inline-block;
  font-size:0.72rem;
  color: var(--accent);
  background: var(--bg-soft);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
  font-weight:700;
}

.spec-table{ width:100%; border-collapse: collapse; margin: 1em 0; font-size:0.94rem; }
.spec-table th,.spec-table td{
  text-align:left;
  padding: 10px 14px;
  border-bottom: 1px solid #e1e6dd;
  vertical-align:top;
}
.spec-table th{ background: var(--bg-soft); color: var(--graphite); width: 28%; }

.detail-block{
  border-left: 3px solid var(--accent-soft);
  padding: 4px 0 4px 20px;
  margin-bottom: 22px;
}
.detail-block h4{ margin-bottom:0.3em; color: var(--graphite); font-size:1rem; }

.notice{
  background: var(--bg-soft);
  border: 1px solid #dfe6da;
  border-left: 4px solid var(--stone);
  padding: 16px 20px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  color: var(--graphite);
  margin: 1.4em 0;
}
.notice strong{ color: var(--text); }

.steps{ counter-reset: step; list-style:none; padding:0; }
.steps li{
  counter-increment: step;
  position:relative;
  padding: 18px 0 18px 54px;
  border-bottom: 1px solid #e6e9e3;
}
.steps li::before{
  content: counter(step, decimal-leading-zero);
  position:absolute; left:0; top:16px;
  font-size:1.2rem; font-weight:700; color: var(--accent);
  width:40px; height:40px;
  border:1px solid var(--accent-soft);
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
}

figure.img-frame{ margin:0 0 1.6em; }
figure.img-frame figcaption{
  font-size:0.8rem;
  color: var(--arch);
  margin-top:8px;
}

.two-col{ display:grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items:center; }

.tag-row{ display:flex; flex-wrap:wrap; gap:8px; margin: 10px 0 20px; }
.tag-row span{
  font-size:0.78rem;
  background:#fff;
  border:1px solid var(--arch);
  color: var(--graphite);
  padding:4px 12px;
  border-radius:999px;
}

.cta-band{
  background: var(--accent);
  color:#fff;
  border-radius: var(--radius);
  padding: 40px;
  text-align:center;
  margin: 50px 0 0;
}
.cta-band h2{ color:#fff; }
.cta-band p{ color: #dde6dd; max-width:60ch; margin: 0 auto 1.4em; }
.cta-band .btn-outline{ border-color:#fff; color:#fff; }
.cta-band .btn-outline:hover{ background:#fff; color: var(--accent); }
.cta-band .btn-primary{ background:#fff; color: var(--accent); }
.cta-band .btn-primary:hover{ background: var(--bg-soft); }

/* ---------- Article index cards ---------- */
.article-card{
  background:#fff; border:1px solid #e6e9e3; border-radius: var(--radius);
  overflow:hidden; box-shadow: var(--shadow-sm); display:flex; flex-direction:column;
}
.article-card img{ border-radius:0; margin:0; }
.article-card .article-card-body{ padding:20px; display:flex; flex-direction:column; flex:1; }
.article-card .tag{ align-self:flex-start; }
.article-card h3{ font-size:1.05rem; }
.article-card p{ font-size:0.92rem; color: var(--graphite); flex:1; }

.filter-row{ display:flex; flex-wrap:wrap; gap:10px; margin-bottom: 30px; }
.filter-row button{
  background:#fff; border:1px solid var(--arch); color: var(--graphite);
  padding:7px 16px; border-radius:999px; font-size:0.84rem; cursor:pointer;
  font-family: var(--font);
}
.filter-row button.active, .filter-row button:hover{
  background: var(--accent); color:#fff; border-color: var(--accent);
}

article.full-article{ scroll-margin-top: 90px; }
article.full-article + article.full-article{ margin-top: 70px; padding-top: 60px; border-top:1px solid #e1e6dd; }

/* ---------- Forms ---------- */
.form-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-grid .full{ grid-column: 1 / -1; }
.field label{ display:block; font-weight:700; font-size:0.88rem; margin-bottom:6px; color: var(--graphite); }
.field .req{ color:#a33; font-weight:400; }
.field input, .field select, .field textarea{
  width:100%;
  font-family: var(--font);
  font-size:0.94rem;
  padding: 11px 13px;
  border: 1px solid #ccd3c8;
  border-radius: 4px;
  background:#fff;
  color: var(--text);
}
.field input:focus, .field select:focus, .field textarea:focus{
  outline: 2px solid var(--accent-soft);
  outline-offset:1px;
}
.field textarea{ resize: vertical; min-height:110px; }
.field-hint{ font-size:0.78rem; color: var(--arch); margin-top:4px; }
.checkbox-field{ display:flex; gap:10px; align-items:flex-start; font-size:0.88rem; }
.checkbox-field input{ width:auto; margin-top:4px; }
.form-msg{ margin-top:16px; padding:14px 16px; border-radius:4px; font-size:0.9rem; display:none; }
.form-msg.success{ display:block; background:#e7f1e9; color: var(--accent); border:1px solid #bcd6c2; }
.form-msg.error{ display:block; background:#fbeaea; color:#9a3b3b; border:1px solid #edc6c6; }
.honeypot{ position:absolute; left:-9999px; opacity:0; height:0; width:0; }

/* ---------- Footer ---------- */
footer.site-footer{
  background: var(--graphite);
  color: #dfe6da;
  padding: 56px 0 24px;
  margin-top: 60px;
  font-size: 0.9rem;
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid #5a655f;
}
.footer-brand{ display:flex; align-items:center; gap:10px; font-weight:700; color:#fff; font-size:1rem; margin-bottom:14px; }
footer.site-footer h4{ color:#fff; font-size:0.92rem; margin-bottom:14px; }
footer.site-footer ul{ list-style:none; padding:0; margin:0; }
footer.site-footer li{ margin-bottom:9px; }
footer.site-footer a{ color:#cdd6c8; }
footer.site-footer a:hover{ color:#fff; }
.footer-bottom{
  padding-top: 22px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
  color:#aab5a4; font-size:0.8rem;
}
.footer-bottom a{ color:#aab5a4; }

@media (max-width: 980px){
  nav.main-nav{
    position:fixed; inset: 60px 0 0 0;
    background: var(--bg);
    flex-direction:column;
    padding: 20px 24px;
    transform: translateY(-110%);
    transition: transform 0.25s ease;
    overflow-y:auto;
    border-top: 1px solid #e1e6dd;
  }
  nav.main-nav.open{ transform: translateY(0); }
  nav.main-nav ul{ flex-direction:column; width:100%; }
  nav.main-nav a{ display:block; padding:12px 8px; font-size:1rem; border-bottom:1px solid #eef2ec; }
  .header-cta{ margin: 10px 0 0; text-align:center; }
  .nav-toggle{ display:flex; }
  .hero-grid{ grid-template-columns:1fr; padding: 40px 20px; }
  .two-col{ grid-template-columns:1fr; }
  .grid-2,.grid-3,.grid-4{ grid-template-columns: 1fr; }
  .form-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}

@media (max-width:600px){
  .footer-grid{ grid-template-columns: 1fr; }
  .section{ padding: 44px 0; }
  .spec-table th{ width:40%; }
}

.skip-link{position:absolute;left:-9999px;top:0;background:#1f1f1f;color:#fff;padding:10px 16px;z-index:1000;text-decoration:none;}
.skip-link:focus{left:12px;top:12px;}

/* heading-level aliases */
.hv-h4{font-size:1em;}
.hv-h3,.hv-h4{
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
  margin: 0 0 0.6em;
}
.hv-h3{ font-size: 1.2rem; }
.card .hv-h3{ color: var(--accent); margin-bottom:0.5em; }
.detail-block .hv-h4{ margin-bottom:0.3em; color: var(--graphite); font-size:1rem; }
.article-card .hv-h3{ font-size:1.05rem; }
footer.site-footer .hv-h4{ color:#fff; font-size:0.92rem; margin-bottom:14px; }