/* Professional palette for engineer audience:
   navy slate + blue accent, minimal decoration with a soft tint */
:root{
  --cpp-ink:#0f1b2d;
  --cpp-ink-2:#334155;
  --cpp-muted:#64748b;
  --cpp-line:#dfe7ef;
  --cpp-bg:#f7fafd;
  --cpp-bg-2:#eef4fa;
  --cpp-card:#ffffff;
  --cpp-accent:#0369a1;
  --cpp-accent-2:#0ea5e9;
}

body{
  font-family:"Hiragino Sans","Noto Sans JP","Yu Gothic",system-ui,-apple-system,sans-serif !important;
  background:#f7fafd !important;
  color:var(--cpp-ink) !important;
  line-height:1.72 !important;
}

.idx-hero{padding:72px 28px 56px;background:linear-gradient(180deg,#f4f8fc 0%,#eaf1f8 100%);border-bottom:1px solid var(--cpp-line)}
.idx-hero-inner{max-width:880px;margin:0 auto}
.idx-hero h1{font-size:clamp(30px,4vw,42px);font-weight:800;color:var(--cpp-ink);line-height:1.4;letter-spacing:.01em}
.idx-hero h1 span{color:var(--cpp-accent)}
.idx-sub{color:var(--cpp-ink-2);font-size:17px;margin:18px 0 0;line-height:1.85}
.idx-hero-meta{margin-top:22px;display:flex;gap:10px;flex-wrap:wrap;font-size:13.5px;color:var(--cpp-muted)}
.idx-hero-meta span{padding:5px 12px;border:1px solid var(--cpp-line);border-radius:999px;background:var(--cpp-card)}
.idx-hero-cta{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.idx-cta{display:inline-block;padding:14px 28px;background:var(--cpp-accent);color:#fff;border-radius:8px;font-size:15.5px;font-weight:700;text-decoration:none;transition:.18s}
.idx-cta:hover{background:#075985;transform:translateY(-1px)}
.idx-cta-ghost{display:inline-block;padding:13px 22px;border:1px solid var(--cpp-line);background:var(--cpp-card);color:var(--cpp-accent);border-radius:8px;font-size:15px;font-weight:700;text-decoration:none;transition:.18s}
.idx-cta-ghost:hover{border-color:var(--cpp-accent-2);background:#eaf4fb}

/* C-site guidance notice */
.c-notice{max-width:1120px;margin:24px auto 0;padding:0 20px}
.c-notice-inner{background:var(--cpp-card);border:1px solid var(--cpp-line);border-left:3px solid var(--cpp-accent-2);border-radius:8px;padding:14px 18px;display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.c-notice-label{font-size:11px;font-weight:700;letter-spacing:.08em;color:var(--cpp-accent);text-transform:uppercase;padding:3px 8px;background:#e6f3fb;border-radius:4px;flex:0 0 auto}
.c-notice-text{font-size:14px;color:var(--cpp-ink-2);line-height:1.7;flex:1;min-width:220px}
.c-notice-text b{color:var(--cpp-ink)}
.c-notice-link{font-size:14px;font-weight:700;color:var(--cpp-accent);text-decoration:none;white-space:nowrap;padding:8px 14px;border:1px solid var(--cpp-line);border-radius:6px;background:var(--cpp-bg);transition:.15s}
.c-notice-link:hover{border-color:var(--cpp-accent);background:#eaf4fb}

.idx-features{max-width:1120px;margin:0 auto;padding:48px 20px 28px}
.idx-features h2,.idx-section-title{text-align:left;font-size:23px;font-weight:700;color:var(--cpp-ink);margin-bottom:8px;letter-spacing:.01em}
.idx-features .sub,.idx-section-sub{text-align:left;color:var(--cpp-muted);font-size:14.5px;margin-bottom:24px;line-height:1.7}
.feat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.feat-card{background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:10px;padding:22px;transition:.15s;position:relative}
.feat-card:hover{border-color:var(--cpp-accent-2);box-shadow:0 6px 20px rgba(14,165,233,.08)}
.feat-icon{font-size:24px;margin-bottom:10px;color:var(--cpp-accent);font-weight:700}
.feat-title{font-size:16px;font-weight:700;color:var(--cpp-ink);margin-bottom:6px}
.feat-desc{font-size:14px;color:var(--cpp-ink-2);line-height:1.8}

.idx-stats{background:#0f1b2d;padding:36px 20px;margin:0;border-top:1px solid #1e293b;border-bottom:1px solid #1e293b}
.stat-row{max-width:1120px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;text-align:center}
@media(max-width:600px){.stat-row{grid-template-columns:repeat(2,1fr)}}
.stat-item .num{font-size:clamp(28px,3.5vw,36px);font-weight:800;color:#e2e8f0;letter-spacing:.01em}
.stat-item .lbl{color:#94a3b8;font-size:13px;margin-top:4px}

.idx-popular{max-width:1120px;margin:0 auto;padding:48px 20px}
.idx-popular h2{text-align:left;font-size:23px;font-weight:700;color:var(--cpp-ink);margin-bottom:8px}
.idx-popular .sub{text-align:left;color:var(--cpp-muted);font-size:14.5px;margin-bottom:24px}
.pop-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:14px}
.pop-card{display:flex;gap:14px;background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:10px;padding:18px;text-decoration:none;color:inherit;transition:.15s}
.pop-card:hover{border-color:var(--cpp-accent);box-shadow:0 4px 14px rgba(3,105,161,.1)}
.pop-badge{flex:0 0 44px;height:44px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;color:#fff;background:var(--cpp-accent)}
.pop-info{flex:1;min-width:0}
.pop-title{font-size:15.5px;font-weight:700;color:var(--cpp-ink)}
.pop-desc{font-size:13.5px;color:var(--cpp-ink-2);margin-top:5px;line-height:1.65}
.pop-tag{display:inline-block;margin-top:8px;margin-right:4px;font-size:11px;font-weight:600;padding:2px 8px;border-radius:4px;background:#f1f5f9;color:var(--cpp-ink-2);border:1px solid var(--cpp-line)}

/* Top compact nav bar */
.top-nav{position:sticky;top:0;z-index:50;background:rgba(247,250,253,.92);backdrop-filter:saturate(150%) blur(8px);border-bottom:1px solid var(--cpp-line)}
.top-nav-inner{max-width:1120px;margin:0 auto;padding:12px 20px;display:flex;gap:20px;align-items:center;flex-wrap:wrap;font-size:14px}
.top-nav .brand{font-weight:800;color:var(--cpp-ink);text-decoration:none;letter-spacing:.02em;font-size:15px}
.top-nav .brand em{font-style:normal;color:var(--cpp-accent)}
.top-nav-links{display:flex;gap:16px;margin-left:auto;flex-wrap:wrap;align-items:center}
.top-nav-links a{color:var(--cpp-ink-2);text-decoration:none;font-weight:600}
.top-nav-links a:hover{color:var(--cpp-accent)}
.top-nav-links .lang{color:var(--cpp-muted);font-weight:500}
.top-nav-links .div{color:#cbd5e1}

.idx-audience{max-width:1120px;margin:0 auto;padding:0 20px 48px}
.audience-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.aud-card{background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:10px;padding:20px}
.aud-kicker{display:inline-block;padding:3px 10px;border-radius:4px;font-size:11.5px;font-weight:700;letter-spacing:.06em;color:var(--cpp-accent);background:#f0f9ff;border:1px solid #bae6fd}
.aud-card h3{font-size:16px;font-weight:700;color:var(--cpp-ink);margin:12px 0 8px}
.aud-card p{font-size:14px;color:var(--cpp-ink-2);line-height:1.8}

.idx-roadmap{max-width:1120px;margin:0 auto;padding:0 20px 48px}
.road-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.road-card{background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:10px;padding:20px;border-left:3px solid var(--cpp-accent)}
.road-step{font-size:12px;font-weight:700;color:var(--cpp-accent);letter-spacing:.08em;text-transform:uppercase}
.road-card h3{font-size:16px;font-weight:700;color:var(--cpp-ink);margin-top:8px}
.road-card p{font-size:14px;color:var(--cpp-ink-2);line-height:1.8;margin-top:8px}
.road-card ul{margin:12px 0 0 20px;color:var(--cpp-ink-2);font-size:13.5px;line-height:1.9}

.idx-curriculum{max-width:1120px;margin:0 auto;padding:48px 20px 28px}
.idx-curriculum h2{text-align:left;font-size:23px;font-weight:700;color:var(--cpp-ink);margin-bottom:8px}
.idx-curriculum .sub{text-align:left;color:var(--cpp-muted);font-size:14.5px;margin-bottom:26px}
.cur-section{margin-bottom:26px}
.cur-header{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.cur-badge{padding:4px 11px;border-radius:4px;font-size:12px;font-weight:700;color:#fff;letter-spacing:.04em}
.cur-title{font-size:16px;font-weight:700;color:var(--cpp-ink)}
.wip-tag{display:inline-block;padding:2px 9px;border-radius:10px;font-size:11px;font-weight:700;background:#fef3c7;color:#854d0e;border:1px solid #fcd34d;letter-spacing:.04em;margin-left:4px}
.cur-section.wip .cur-grid{opacity:.72}
.cur-section.wip .cur-card{cursor:not-allowed;pointer-events:none}
.cur-section.wip .cur-card:hover{border-color:var(--cpp-line);background:var(--cpp-card)}
.cur-section.wip .cur-grid::after{content:"※ このセクションは現在作成中・内容確認中です";display:block;grid-column:1/-1;font-size:12.5px;color:#92400e;background:#fef9c3;border:1px dashed #eab308;border-radius:6px;padding:8px 12px;margin-top:4px}
.cur-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:8px}
.cur-card{display:flex;gap:12px;align-items:center;background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:6px;padding:12px 14px;text-decoration:none;color:inherit;transition:.12s}
.cur-card:hover{border-color:var(--cpp-accent);background:#eaf4fb}
.cur-card .num{font-size:12px;color:var(--cpp-muted);font-weight:600;min-width:28px}
.cur-card .ttl{font-size:14.5px;font-weight:600;color:var(--cpp-ink)}
.cur-card.highlight{border-left:3px solid var(--cpp-accent);background:#eaf4fb}
.cur-card.highlight .num{color:var(--cpp-accent)}

.idx-support{max-width:1120px;margin:0 auto;padding:0 20px 48px}
.support-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.support-card{background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:10px;padding:20px}
.support-card h3{font-size:16px;font-weight:700;color:var(--cpp-ink);margin-bottom:8px}
.support-card p{font-size:14px;color:var(--cpp-ink-2);line-height:1.8}
.support-label{display:inline-block;font-size:11px;font-weight:700;padding:3px 10px;border-radius:4px;background:#f0f9ff;color:var(--cpp-accent);border:1px solid #bae6fd;margin-bottom:10px}
.support-link{display:inline-block;margin-top:14px;color:var(--cpp-accent);text-decoration:none;font-size:14px;font-weight:700}
.support-note{max-width:860px;margin:18px auto 0;color:var(--cpp-muted);font-size:12.5px;line-height:1.8;text-align:left}

.idx-trust{max-width:1120px;margin:0 auto;padding:0 20px 48px}
.trust-box{background:#0f1b2d;border-radius:10px;padding:26px 28px;color:#e2e8f0;border:1px solid #1e293b}
.trust-box h2{font-size:19px;font-weight:700;margin-bottom:10px;color:#fff}
.trust-box p{font-size:14.5px;line-height:1.85;color:#cbd5e1}
.trust-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.trust-actions a{display:inline-block;padding:10px 18px;border-radius:6px;text-decoration:none;font-size:13.5px;font-weight:700}
.trust-actions .primary{background:var(--cpp-accent);color:#fff}
.trust-actions .secondary{background:transparent;color:#cbd5e1;border:1px solid #334155}

.idx-bottom-cta{text-align:left;padding:40px 20px;background:var(--cpp-bg-2);border-top:1px solid var(--cpp-line)}
.idx-bottom-cta-inner{max-width:1120px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.idx-bottom-cta h2{font-size:21px;font-weight:700;color:var(--cpp-ink);margin-bottom:6px}
.idx-bottom-cta p{color:var(--cpp-ink-2);font-size:14.5px;line-height:1.75}
.idx-bottom-actions{display:flex;gap:10px;flex-wrap:wrap}
.idx-ghost-cta{display:inline-block;padding:12px 20px;border-radius:6px;border:1px solid var(--cpp-line);background:var(--cpp-card);color:var(--cpp-accent);font-size:14px;font-weight:700;text-decoration:none}

.idx-footer{max-width:1120px;margin:0 auto;padding:24px 20px;color:var(--cpp-muted);font-size:13px;border-top:1px solid var(--cpp-line);display:flex;gap:18px;justify-content:space-between;align-items:center;flex-wrap:wrap}
.idx-footer nav{display:flex;gap:16px;flex-wrap:wrap}
.idx-footer a{color:var(--cpp-ink-2);text-decoration:none}
.idx-footer a:hover{color:var(--cpp-accent)}