/* TrainMyBrain — blog/article styles (shared by all article pages) */
:root{
  --blue-900:#0f3a5f;--blue-700:#1a6bb0;--blue-600:#2a7ec4;--blue-500:#4a97d6;
  --blue-100:#e4f1fb;--blue-50:#f2f9fe;--teal:#128a8a;--ink:#1f2d3d;--slate:#4a5a6a;
  --line:#d7e6f2;--warm:#f0873a;--shadow:0 10px 30px rgba(20,80,140,.10);--shadow-sm:0 4px 14px rgba(20,80,140,.08);--maxw:1120px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.7;-webkit-font-smoothing:antialiased;}
a{color:var(--blue-700);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;display:block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px;}
.brand{display:flex;align-items:center;gap:12px;}
.brand-logo{width:44px;height:44px;object-fit:contain;}
.brand-text{display:flex;flex-direction:column;line-height:1.05;}
.brand-name{font-weight:800;font-size:1.18rem;letter-spacing:-.02em;color:var(--blue-900);}
.brand-tag{font-size:.72rem;color:var(--teal);font-weight:600;}
.nav{display:flex;align-items:center;gap:24px;}
.nav a{color:var(--slate);font-weight:600;font-size:.95rem;}
.nav a:hover{color:var(--blue-700);text-decoration:none;}
.nav .btn-nav{background:var(--blue-700);color:#fff;padding:10px 18px;border-radius:999px;font-size:.9rem;}
.nav .btn-nav:hover{background:var(--blue-600);text-decoration:none;}

.article-head{background:linear-gradient(180deg,var(--blue-50),#fff);border-bottom:1px solid var(--line);padding:26px 0 34px;}
.crumb{color:var(--slate);font-size:.88rem;margin-bottom:16px;}
.crumb a{color:var(--blue-700);}
.eyebrow{display:inline-block;background:var(--blue-100);color:var(--blue-700);font-weight:700;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;padding:6px 12px;border-radius:999px;margin-bottom:14px;}
.article-head h1{font-size:clamp(1.8rem,3.6vw,2.6rem);line-height:1.15;letter-spacing:-.02em;color:var(--blue-900);margin:0;max-width:24ch;}

article.post{padding:36px 0 10px;}
article.post .body{max-width:720px;margin:0 auto;}
article.post .body p{font-size:1.09rem;color:#2b3a49;margin:0 0 20px;}
article.post .body h2{font-size:1.45rem;color:var(--blue-900);letter-spacing:-.01em;margin:34px 0 12px;}
.helpbox{background:var(--blue-50);border:1px solid var(--line);border-left:4px solid var(--teal);border-radius:0 14px 14px 0;padding:22px 26px;margin:30px 0;}
.helpbox h2{margin-top:0 !important;color:var(--teal) !important;}
.helpbox p:last-child{margin-bottom:0;}

.cta-band{max-width:720px;margin:32px auto;background:linear-gradient(160deg,var(--blue-900),var(--blue-700));color:#eaf4fb;border-radius:18px;padding:30px 32px;box-shadow:var(--shadow);}
.cta-band h3{margin:0 0 8px;color:#fff;font-size:1.3rem;letter-spacing:-.01em;}
.cta-band p{margin:0 0 18px;color:#cfe4f6;}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;padding:13px 22px;border-radius:10px;transition:.16s;}
.btn.primary{background:#fff;color:var(--blue-700);}
.btn.primary:hover{background:#eaf4fb;text-decoration:none;}
.btn.warm{background:var(--warm);color:#fff;}
.btn.warm:hover{background:#e0761f;text-decoration:none;}

.sources{max-width:720px;margin:26px auto 0;border-top:1px solid var(--line);padding-top:20px;}
.sources h2{font-size:1.05rem;color:var(--blue-900);margin:0 0 12px;}
.sources ul{margin:0;padding-left:18px;}
.sources li{color:var(--slate);font-size:.9rem;margin-bottom:8px;line-height:1.5;}
.sources a{word-break:break-word;}
.disclaimer{max-width:720px;margin:22px auto 0;color:var(--slate);font-size:.82rem;border-top:1px dashed var(--line);padding-top:16px;}

.related{background:var(--blue-50);border-top:1px solid var(--line);margin-top:44px;padding:44px 0;}
.related h2{text-align:center;color:var(--blue-900);font-size:1.4rem;margin:0 0 22px;}
.rel-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;}
.rel-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;box-shadow:var(--shadow-sm);}
.rel-card .tag{font-size:.7rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--teal);}
.rel-card h4{margin:6px 0 0;color:var(--blue-900);font-size:1rem;line-height:1.3;}

.site-footer{background:var(--blue-900);color:#c8ddef;padding:48px 0 28px;font-size:.92rem;}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;margin-bottom:26px;}
.site-footer .brand-name{color:#fff;}.site-footer .brand-tag{color:#9fc4e4;}
.site-footer h5{color:#fff;font-size:.95rem;margin:0 0 12px;}
.site-footer a{color:#c8ddef;display:block;margin-bottom:8px;}
.site-footer a:hover{color:#fff;}
.foot-note{border-top:1px solid rgba(255,255,255,.14);padding-top:18px;color:#8fb4d6;font-size:.8rem;}

@media (max-width:820px){
  .nav{display:none;}
  .rel-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;}
}