/*
Theme Name: Seisan Tech Notes
Theme URI: https://example.com/
Author: OpenAI
Author URI: https://openai.com/
Description: 生産技術・データ分析・Power BI・Power Automate をテーマにした、技術ノウハウ発信向けのカスタムWordPressテーマたたき台。
Version: 0.2.1
Requires at least: 6.0
Tested up to: 6.6
Requires PHP: 7.4
Text Domain: seisan-tech
*/

:root{
  --bg:#07111c;
  --bg-soft:#0c1725;
  --panel:#111d2d;
  --panel-2:#17263c;
  --line:rgba(162,188,223,.16);
  --text:#edf5ff;
  --muted:#9fb4ca;
  --accent:#73c4ff;
  --accent-2:#69f0c6;
  --shadow:0 18px 48px rgba(0,0,0,.38);
  --radius:24px;
  --max:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:
    radial-gradient(circle at 90% 0%, rgba(105,240,198,.10), transparent 24%),
    radial-gradient(circle at 0% 0%, rgba(115,196,255,.14), transparent 28%),
    linear-gradient(180deg, #06101a 0%, #0a1420 100%);
  color:var(--text);
  line-height:1.7;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(var(--max), calc(100% - 40px)); margin:0 auto}
.section{padding:88px 0}
.section.alt{background:rgba(255,255,255,.02)}
.narrow{width:min(860px, calc(100% - 40px)); margin:0 auto}
.eyebrow{
  color:var(--accent);
  text-transform:uppercase;
  letter-spacing:.14em;
  font-size:.76rem;
  font-weight:800;
  margin:0 0 12px;
}
h1,h2,h3,h4{line-height:1.12; margin:0 0 14px}
p{margin:0 0 14px; color:var(--muted)}
ul{margin:0; padding-left:18px}
li{color:var(--muted); margin:0 0 8px}

.site-header{
  position:sticky; top:0; z-index:30;
  background:rgba(6,13,21,.78);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  min-height:78px; display:flex; align-items:center; justify-content:space-between; gap:24px;
}
.brand{display:flex; align-items:center; gap:14px}
.brand-mark{
  width:46px; height:46px; border-radius:16px;
  display:grid; place-items:center;
  font-weight:800; letter-spacing:.04em;
  background:linear-gradient(135deg, rgba(115,196,255,.24), rgba(105,240,198,.18));
  border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow);
}
.brand strong{display:block; font-size:1rem; color:#fff}
.brand small{display:block; color:var(--muted)}
.primary-nav{display:flex; align-items:center; gap:20px}
.primary-nav ul{display:flex; gap:18px; list-style:none; padding:0; margin:0}
.primary-nav li{margin:0}
.primary-nav a{color:var(--muted); font-weight:600}
.primary-nav a:hover{color:#fff}
.nav-cta,.button{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 18px; border-radius:999px; font-weight:700;
  transition:.2s ease; border:1px solid transparent;
}
.nav-cta,.button-primary{
  color:#05111b;
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
}
.button-secondary{
  color:#fff;
  background:rgba(255,255,255,.03);
  border-color:var(--line);
}
.nav-cta:hover,.button:hover{transform:translateY(-1px)}
.menu-toggle{
  display:none; border:1px solid var(--line); border-radius:999px; background:none; color:#fff; padding:10px 14px;
}

.hero{padding:72px 0 24px}
.hero-grid{display:grid; grid-template-columns:1.1fr .9fr; gap:42px; align-items:center}
.hero h1{
  font-size:clamp(2.4rem, 6vw, 5rem);
  max-width:10ch;
  margin-bottom:18px;
}
.hero h1 span{
  color:transparent;
  background:linear-gradient(135deg,#fff,var(--accent));
  -webkit-background-clip:text; background-clip:text;
}
.hero-lead{font-size:1.08rem; max-width:60ch}
.hero-actions{display:flex; gap:14px; flex-wrap:wrap; margin:26px 0 28px}
.hero-metrics{
  list-style:none; padding:0; margin:0;
  display:flex; gap:16px; flex-wrap:wrap;
}
.hero-metrics li{
  min-width:150px;
  padding:16px 18px;
  border-radius:18px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
}
.hero-metrics strong{display:block; font-size:1.55rem; color:#fff}
.hero-metrics span{display:block; margin-top:6px; color:var(--muted); font-size:.88rem}
.hero-panel{position:relative}
.screen-card,.strip-card,.card,.post-card,.category-card,.timeline-card,.feature-article,.mini-card,.contact-card,.matrix-row,.article,.page-article{
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  box-shadow:var(--shadow);
}
.screen-card{
  background:linear-gradient(180deg, rgba(17,29,45,.96), rgba(10,20,33,.96));
  overflow:hidden;
}
.screen-header{display:flex; gap:8px; padding:16px 18px; border-bottom:1px solid var(--line)}
.screen-header span{
  width:10px; height:10px; border-radius:999px;
  background:rgba(255,255,255,.18);
}
.screen-body{padding:22px}
.screen-kpis{
  display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-bottom:22px;
}
.screen-kpis div,.signal-grid div{
  padding:14px; border-radius:18px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
}
.screen-kpis small,.signal-grid{color:var(--muted)}
.screen-kpis strong{display:block; margin-top:8px; color:#fff; font-size:1.28rem}
.chart-bars{
  display:flex; align-items:flex-end; gap:10px;
  height:180px; padding:18px 0 12px;
}
.chart-bars span{
  flex:1;
  border-radius:14px 14px 4px 4px;
  background:linear-gradient(180deg,var(--accent),rgba(115,196,255,.22));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.06);
}
.signal-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:6px}
.signal-grid strong{display:block; margin-top:8px; color:#fff}

.dark-strip{padding-top:30px}
.strip-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:18px}
.strip-card{padding:24px}
.strip-card small,.tag,.post-meta{
  display:inline-block; color:var(--accent); font-weight:800; margin-bottom:10px
}

.section-head{max-width:760px; margin-bottom:28px}
.section-head.left{margin-bottom:20px}
.section-head h2{font-size:clamp(1.8rem,3.4vw,3rem)}

.category-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:18px}
.category-card{padding:24px; position:relative; overflow:hidden}
.category-card:before{
  content:""; position:absolute; width:180px; height:180px; right:-60px; bottom:-80px;
  background:radial-gradient(circle, rgba(115,196,255,.16), transparent 66%);
}
.cat-index{
  display:inline-block; margin-bottom:12px;
  color:rgba(255,255,255,.26); font-weight:800;
}

.timeline{display:grid; grid-template-columns:repeat(4,1fr); gap:18px}
.timeline-card{padding:24px}
.timeline-card span{
  display:inline-flex; margin-bottom:12px;
  padding:6px 10px; border-radius:999px;
  background:var(--accent); color:#08111b;
  font-weight:800; font-size:.8rem;
}

.two-col{display:grid; grid-template-columns:1.05fr .95fr; gap:24px; align-items:start}
.feature-article{padding:28px}
.feature-article h3{font-size:clamp(1.5rem,2.5vw,2.2rem)}
.feature-meta{display:flex; gap:10px; flex-wrap:wrap; margin-top:18px}
.feature-meta span{
  padding:8px 12px; border-radius:999px;
  background:rgba(115,196,255,.08);
  border:1px solid var(--line);
  color:#ddecff; font-size:.82rem;
}
.mini-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
.mini-card{padding:22px; min-height:165px}

.matrix{display:grid; gap:14px}
.matrix-row{
  display:grid; grid-template-columns:220px 1fr;
  padding:20px 22px;
}
.matrix-row strong{color:#fff}

.contact-card{
  padding:28px 30px;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  background:linear-gradient(135deg, rgba(115,196,255,.12), rgba(105,240,198,.08));
}

.archive-hero,.page-shell,.article-shell{padding-top:52px}
.content-grid,.article-grid{
  display:grid; grid-template-columns:minmax(0,1fr) 320px; gap:24px;
}
.post-list{display:grid; gap:20px}
.post-card{overflow:hidden}
.post-card-inner{padding:24px}
.post-card h2,.article h1,.page-article h1{font-size:clamp(1.6rem,3vw,2.8rem)}
.text-link{font-weight:700; color:#fff}
.sidebar{display:grid; gap:18px}
.card{padding:22px}
.sidebar-list{list-style:none; padding:0}
.sidebar-list li{
  padding:10px 0; border-bottom:1px solid var(--line);
}
.article,.page-article{
  padding:28px;
}
.article-content h2,.article-content h3,.article-content h4{margin-top:30px}
.article-content ul,.article-content ol{margin-bottom:18px}
.article-content table{width:100%; border-collapse:collapse; margin:18px 0}
.article-content th,.article-content td{
  border:1px solid var(--line); padding:12px; color:var(--muted);
}

.site-footer{
  border-top:1px solid var(--line);
  background:rgba(6,13,22,.88);
  padding:34px 0 24px;
}
.footer-grid{display:grid; grid-template-columns:1.4fr .8fr 1fr; gap:24px; padding-bottom:22px}
.footer-links{list-style:none; padding:0}
.footer-links li{margin-bottom:8px}
.footer-bottom{
  display:flex; justify-content:space-between; gap:16px;
  padding-top:18px; border-top:1px solid var(--line)
}

@media (max-width:1100px){
  .hero-grid,.category-grid,.timeline,.two-col,.strip-grid,.footer-grid{grid-template-columns:1fr 1fr}
  .content-grid,.article-grid{grid-template-columns:1fr}
}
@media (max-width:760px){
  .menu-toggle{display:inline-flex}
  .primary-nav{
    display:none; position:absolute; top:78px; left:0; right:0;
    padding:20px; background:rgba(7,14,24,.97); border-bottom:1px solid var(--line);
    flex-direction:column; align-items:flex-start;
  }
  .primary-nav.is-open{display:flex}
  .primary-nav ul{flex-direction:column; width:100%}
  .hero-grid,.category-grid,.timeline,.two-col,.strip-grid,.footer-grid,.mini-grid,.signal-grid,.screen-kpis{grid-template-columns:1fr}
  .matrix-row{grid-template-columns:1fr}
  .contact-card,.footer-bottom{flex-direction:column; align-items:flex-start}
  .section{padding:68px 0}
  .container,.narrow{width:min(var(--max), calc(100% - 24px))}
  .hero{padding-top:44px}
}