:root{
  --ptri-primary:#2563eb;
  --ptri-primary-dark:#1e3a8a;
  --ptri-secondary:#0f766e;
  --ptri-accent:#f59e0b;
  --ptri-bg:#f8fafc;
  --ptri-surface:#ffffff;
  --ptri-border:#e2e8f0;
  --ptri-text:#0f172a;
  --ptri-soft:#64748b;
  --ptri-shadow:0 18px 50px rgba(15,23,42,.08);
  --ptri-shadow-sm:0 10px 30px rgba(15,23,42,.06);
  --ptri-radius:20px;
}
.ptri-home,.ptri-subject-page,.ptri-catalog,.ptri-dashboard,.ptri-login,.ptri-archive{max-width:1280px;margin:0 auto;padding:24px}
.ptri-hero{display:grid;grid-template-columns:1.25fr .85fr;gap:28px;align-items:stretch;padding:34px;border:1px solid var(--ptri-border);border-radius:28px;background:linear-gradient(135deg,#fff 0%,#eff6ff 100%);box-shadow:var(--ptri-shadow)}
.ptri-hero-small{grid-template-columns:1fr}
.ptri-eyebrow{display:inline-block;margin-bottom:10px;font-size:14px;font-weight:700;color:var(--ptri-primary);letter-spacing:.02em;text-transform:uppercase}
.ptri-hero h1{margin:0 0 12px;font-size:38px;line-height:1.15;color:var(--ptri-text)}
.ptri-hero p{margin:0;color:var(--ptri-soft);font-size:17px;line-height:1.7}
.ptri-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.ptri-hero-panel{display:grid;gap:14px}
.ptri-mini-card,.ptri-quick-card,.ptri-subject-card{background:var(--ptri-surface);border:1px solid var(--ptri-border);border-radius:20px;box-shadow:var(--ptri-shadow-sm)}
.ptri-mini-card{padding:18px 18px}
.ptri-mini-card strong{display:block;margin-bottom:8px;color:var(--ptri-text)}
.ptri-mini-card span{color:var(--ptri-soft);font-size:14px;line-height:1.6}
.ptri-section{padding:44px 0}
.ptri-section h2{margin:0 0 10px;font-size:30px;line-height:1.2;color:var(--ptri-text)}
.ptri-section-head{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:18px}
.ptri-section-head p,.ptri-section>p{margin:0;color:var(--ptri-soft);line-height:1.7}
.ptri-quick-grid,.ptri-subject-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.ptri-quick-card{padding:22px;text-decoration:none;transition:transform .18s ease,box-shadow .18s ease}
.ptri-quick-card:hover,.ptri-subject-card:hover{transform:translateY(-2px);box-shadow:var(--ptri-shadow)}
.ptri-quick-card strong{display:block;margin-bottom:8px;color:var(--ptri-text);font-size:18px}
.ptri-quick-card span{display:block;color:var(--ptri-soft);font-size:14px;line-height:1.6}
.ptri-subject-card{padding:24px}
.ptri-subject-card h3{margin:0 0 10px;color:var(--ptri-text);font-size:24px}
.ptri-subject-card p{margin:0 0 16px;color:var(--ptri-soft);line-height:1.7}
.ptri-shortcode-wrap{background:var(--ptri-surface);border:1px solid var(--ptri-border);border-radius:24px;padding:22px;box-shadow:var(--ptri-shadow-sm)}
.ptri-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 20px;border-radius:14px;text-decoration:none;font-weight:700;transition:transform .18s ease,box-shadow .18s ease}
.ptri-btn:hover{transform:translateY(-1px)}
.ptri-btn-primary{background:var(--ptri-primary);color:#fff}
.ptri-btn-secondary{background:#fff;color:var(--ptri-primary);border:1px solid #bfdbfe}
.ptri-btn-soft{background:#eff6ff;color:var(--ptri-primary-dark)}
.ptri-login form{background:#fff;border:1px solid var(--ptri-border);border-radius:20px;padding:22px;box-shadow:var(--ptri-shadow-sm);max-width:560px}
.ptri-login input[type="text"],.ptri-login input[type="password"]{width:100%;padding:12px 14px;border:1px solid var(--ptri-border);border-radius:14px;margin-top:6px;margin-bottom:16px}
.ptri-login input[type="submit"]{background:var(--ptri-primary);color:#fff;border:0;border-radius:14px;padding:14px 18px;font-weight:700}
@media (max-width:1024px){.ptri-hero,.ptri-quick-grid,.ptri-subject-grid{grid-template-columns:1fr 1fr}.ptri-hero-small{grid-template-columns:1fr}}
@media (max-width:767px){.ptri-home,.ptri-subject-page,.ptri-catalog,.ptri-dashboard,.ptri-login,.ptri-archive{padding:16px}.ptri-hero,.ptri-quick-grid,.ptri-subject-grid,.ptri-section-head{grid-template-columns:1fr;display:grid}.ptri-hero h1{font-size:30px}}