/*
Theme Name: Cosmo Kensetsu Lite
Theme URI: https://www.cosmo-air.jp
Author: Cosmo Kensetsu Co., Ltd.
Description: 愛知県安城市の工務店・コスモ建設株式会社のための、ゼロから設計したオリジナルWordPressテーマです。エアサイクル工法・免疫住宅・自由設計をテーマに、木の年輪と呼吸をモチーフにしたデザインを採用しています。
Version: 1.0.0
Requires at least: 6.4
Requires PHP: 7.4
Text Domain: cosmo-lite
Tags: custom-menu, custom-logo, featured-images, translation-ready
*/

/* =========================================================
   DESIGN TOKENS
   ========================================================= */
:root{
  /* Brand palette — pulled from the original site's own CSS */
  --cn-green:        #2f7a08;
  --cn-green-deep:    #22590a;
  --cn-lime:          #8fc31f;
  --cn-tint:          #f2f7e8;
  --cn-tint-deep:     #e6efd6;
  --cn-wood:          #a56a3a;
  --cn-wood-light:    #d9b78f;
  --cn-ink:           #2c2a26;
  --cn-ink-soft:      #6b6459;
  --cn-white:         #ffffff;
  --cn-line:          #e2ded3;
  --cn-alert:         #a51218;

  --cn-font-display: "Zen Old Mincho", "Noto Serif JP", serif;
  --cn-font-body: "Noto Sans JP", -apple-system, sans-serif;

  --cn-radius: 10px;
  --cn-radius-lg: 20px;
  --cn-shadow: 0 16px 34px -18px rgba(34,30,20,0.45);
  --cn-container: 1180px;
}

/* =========================================================
   RESET / BASE
   ========================================================= */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--cn-font-body);
  color: var(--cn-ink);
  background: var(--cn-white);
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  word-break: break-word;
}
img{ max-width:100%; height:auto; display:block; }
a{ color: var(--cn-green); text-decoration:none; }
a:hover{ color: var(--cn-green-deep); }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{
  font-family: var(--cn-font-display);
  color: var(--cn-ink);
  line-height: 1.5;
  margin: 0 0 .6em;
  font-weight: 600;
  letter-spacing: .02em;
}
h1{ font-size: clamp(1.9rem, 3.6vw, 2.7rem); }
h2{ font-size: clamp(1.5rem, 2.6vw, 2rem); }
h3{ font-size: 1.15rem; }
p{ margin: 0 0 1em; }
button, input, select, textarea{ font-family: inherit; font-size:1rem; }
:focus-visible{ outline: 3px solid var(--cn-lime); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce){ *{ animation:none !important; transition:none !important; scroll-behavior:auto !important; } }

.cn-container{ max-width: var(--cn-container); margin:0 auto; padding: 0 24px; }
.cn-eyebrow{
  display:inline-flex; align-items:center; gap:10px;
  font-family: var(--cn-font-body);
  font-size: .78rem; font-weight: 700; letter-spacing: .18em;
  color: var(--cn-green);
}
.cn-eyebrow::before{ content:""; width:24px; height:1px; background: var(--cn-lime); display:inline-block; }

.cn-btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding: 14px 30px; border-radius: 999px;
  font-weight: 700; font-size: .95rem; cursor:pointer; border: 2px solid transparent;
  transition: transform .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
}
.cn-btn-primary{ background: var(--cn-green); color: var(--cn-white); }
.cn-btn-primary:hover{ background: var(--cn-green-deep); color:var(--cn-white); transform: translateY(-2px); }
.cn-btn-ghost{ background: transparent; border-color: var(--cn-white); color: var(--cn-white); }
.cn-btn-ghost:hover{ border-color: var(--cn-lime); color: var(--cn-lime); }
.cn-btn-outline{ background: transparent; border-color: var(--cn-green); color: var(--cn-green); }
.cn-btn-outline:hover{ background: var(--cn-tint); }

/* Signature: growth-ring divider — echoes tree rings / air circulation */
.cn-rings{ position:relative; height:26px; overflow:hidden; }
.cn-rings::before{
  content:""; position:absolute; left:50%; top:-140px; width:320px; height:320px;
  border-radius:50%; transform: translateX(-50%);
  border: 1px solid var(--cn-tint-deep);
  box-shadow: 0 0 0 18px var(--cn-tint), 0 0 0 19px var(--cn-tint-deep), 0 0 0 36px var(--cn-tint);
}

/* Signature: ring badge used for USP callouts */
.cn-ring-badge{
  width: 118px; height:118px; border-radius:50%;
  border: 1px solid var(--cn-lime);
  box-shadow: 0 0 0 8px var(--cn-tint);
  display:flex; align-items:center; justify-content:center;
  background: var(--cn-white); font-size:2.1rem; margin: 0 auto 18px;
}

/* =========================================================
   HEADER
   ========================================================= */
.cn-topbar{ background: var(--cn-ink); color: var(--cn-tint); font-size:.8rem; }
.cn-topbar .cn-container{ display:flex; justify-content:space-between; align-items:center; padding-top:7px; padding-bottom:7px; gap:16px; flex-wrap:wrap; }
.cn-topbar a{ color: var(--cn-tint); }

.cn-header{ background: var(--cn-white); border-bottom: 1px solid var(--cn-line); position: sticky; top:0; z-index: 40; }
.cn-header-inner{ display:flex; align-items:center; gap:28px; padding: 14px 0; }
.cn-logo img{ max-height:58px; width:auto; }
.cn-logo-text{ font-family: var(--cn-font-display); font-weight:700; font-size:1.3rem; color: var(--cn-green); }

.cn-header-actions{ display:flex; align-items:center; gap:20px; margin-left:auto; text-align:right; }
.cn-phone{ font-family: var(--cn-font-display); font-size:1.35rem; color: var(--cn-green-deep); font-weight:700; }
.cn-phone-label{ font-size:.72rem; color: var(--cn-ink-soft); display:block; }
.cn-header-cta{ display:none; }
@media (min-width: 700px){ .cn-header-cta{ display:inline-flex; } }

.cn-nav{ background: var(--cn-green); }
.cn-nav .cn-container{ display:flex; align-items:center; gap: 4px; }
.cn-nav ul{ display:flex; flex-wrap:wrap; }
.cn-nav a{
  display:block; padding: 14px 16px; color: #fff; font-weight:600; font-size:.88rem;
  letter-spacing:.02em;
}
.cn-nav a:hover, .cn-nav .current-menu-item > a{ color: var(--cn-lime); }
.cn-menu-toggle{ display:none; background:none; border:none; color:#fff; font-size:1.5rem; padding: 8px 0; cursor:pointer; }

@media (max-width: 880px){
  .cn-menu-toggle{ display:block; }
  .cn-nav ul{ display:none; flex-direction:column; width:100%; }
  .cn-nav.is-open ul{ display:flex; }
  .cn-nav .cn-container{ flex-direction:column; align-items:flex-start; }
}

/* =========================================================
   HERO
   ========================================================= */
.cn-hero{ position:relative; min-height: 560px; display:flex; align-items:center; color:#fff; overflow:hidden; }
.cn-hero-bg{ position:absolute; inset:0; background-size:cover; background-position:center; }
.cn-hero-bg::after{ content:""; position:absolute; inset:0; background: linear-gradient(100deg, rgba(34,30,20,.78) 20%, rgba(34,30,20,.35) 75%); }
.cn-hero-inner{ position:relative; z-index:2; max-width: 620px; }
.cn-hero .cn-eyebrow{ color: var(--cn-lime); }
.cn-hero .cn-eyebrow::before{ background: var(--cn-lime); }
.cn-hero h1{ color:#fff; }
.cn-hero-sub{ font-size:1.05rem; color: #ece7da; margin-bottom: 1.8em; }
.cn-hero-cta{ display:flex; gap:14px; flex-wrap:wrap; }

/* =========================================================
   SECTIONS
   ========================================================= */
.cn-section{ padding: 70px 0; }
.cn-section.tint{ background: var(--cn-tint); }
.cn-section-head{ text-align:center; max-width:680px; margin: 0 auto 44px; }
.cn-section-head .cn-eyebrow{ justify-content:center; }
.cn-section-head p{ color: var(--cn-ink-soft); margin:0; }

/* USP ring cards */
.cn-usp-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 30px; }
.cn-usp-card{ text-align:center; background:#fff; border:1px solid var(--cn-line); border-radius: var(--cn-radius-lg); padding: 38px 26px; }
.cn-usp-card h3{ margin-bottom:.5em; }
.cn-usp-card p{ color: var(--cn-ink-soft); font-size:.92rem; margin:0; }
@media (max-width: 880px){ .cn-usp-grid{ grid-template-columns:1fr; } }

/* News list */
.cn-news-list{ max-width: 780px; margin: 0 auto; border-top:1px solid var(--cn-line); }
.cn-news-item{ display:flex; gap:24px; padding: 18px 0; border-bottom:1px solid var(--cn-line); align-items:baseline; }
.cn-news-date{ font-family: var(--cn-font-display); color: var(--cn-green); flex-shrink:0; width:110px; }
.cn-news-title{ color: var(--cn-ink); }
.cn-news-title:hover{ color: var(--cn-green); }

/* Portfolio / case studies grid */
.cn-case-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 26px; }
.cn-case-card{ border-radius: var(--cn-radius); overflow:hidden; background:#fff; border:1px solid var(--cn-line); transition: box-shadow .2s ease, transform .2s ease; }
.cn-case-card:hover{ box-shadow: var(--cn-shadow); transform: translateY(-4px); }
.cn-case-thumb{ aspect-ratio: 4/3; overflow:hidden; background: var(--cn-tint); }
.cn-case-thumb img{ width:100%; height:100%; object-fit:cover; }
.cn-case-body{ padding: 16px 18px; }
.cn-case-tag{ display:inline-block; font-size:.68rem; font-weight:700; letter-spacing:.05em; background: var(--cn-tint-deep); color: var(--cn-green-deep); padding:3px 10px; border-radius:999px; margin-bottom:8px; }
@media (max-width: 980px){ .cn-case-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 600px){ .cn-case-grid{ grid-template-columns: 1fr; } }

/* About / philosophy split */
.cn-about{ background: var(--cn-white); }
.cn-about-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items:center; }
.cn-about-grid img{ border-radius: var(--cn-radius-lg); box-shadow: var(--cn-shadow); }
@media (max-width: 880px){ .cn-about-grid{ grid-template-columns:1fr; } }

/* Service area band */
.cn-area{ background: var(--cn-green-deep); color:#fff; text-align:center; padding: 46px 0; }
.cn-area h2{ color:#fff; }
.cn-area p{ color: #d8ecc4; }

/* CTA band */
.cn-cta{ background: var(--cn-tint); padding: 60px 0; text-align:center; }
.cn-cta-buttons{ display:flex; gap:16px; justify-content:center; flex-wrap:wrap; margin-top: 22px; }

/* =========================================================
   FOOTER
   ========================================================= */
.cn-footer{ background: var(--cn-ink); color: #cfc9bc; padding-top: 56px; }
.cn-footer-grid{ display:grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.cn-footer h4{ color:#fff; font-size:1rem; margin-bottom: 1em; font-family: var(--cn-font-display); }
.cn-footer ul li{ margin-bottom: .65em; }
.cn-footer a{ color: #cfc9bc; }
.cn-footer a:hover{ color: var(--cn-lime); }
.cn-footer-logo{ max-height:48px; margin-bottom:14px; filter: brightness(0) invert(1); }
.cn-footer-bottom{ border-top: 1px solid rgba(255,255,255,.12); padding: 18px 0; font-size:.8rem; text-align:center; }
@media (max-width: 880px){ .cn-footer-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px){ .cn-footer-grid{ grid-template-columns: 1fr; } }

/* =========================================================
   GENERIC PAGE / BLOG WRAPPER
   ========================================================= */
.cn-page-header{ background: var(--cn-tint); padding: 44px 0; text-align:center; }
.cn-content-wrap{ padding: 56px 0; }
.cn-content-wrap .cn-container{ max-width: 860px; }
article.post{ background:#fff; border:1px solid var(--cn-line); border-radius: var(--cn-radius); padding: 30px; margin-bottom: 28px; }