/* इतिहास वैकल्पिक : आधार-अध्ययन । केवल दो स्तंभ—मुख्य नोट्स और दाईं तथ्य-पट्टी। */
body.history-foundation-page{background:var(--ds-bg,#f8fafc);color:var(--ds-text,#243449)}
body.history-foundation-page *{box-sizing:border-box}
.hf-shell{width:min(1390px,calc(100% - 40px));margin:1.2rem auto 4rem}
.hf-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:.55rem;color:var(--ds-text-muted,#62748a);font-size:.9rem;margin:0 0 1.3rem}
.hf-crumb a{color:var(--ds-primary,#245eac)}
.hf-heading{max-width:1060px;margin:0 0 1.75rem;padding:0 0 1.25rem;border-bottom:1px solid var(--ds-border,#dce4ee)}
.hf-kicker{font-weight:750;letter-spacing:.025em;color:var(--ds-primary-strong,var(--ds-primary,#2563eb));font-size:.84rem}
.hf-heading h1{font-size:clamp(1.9rem,3.1vw,2.9rem);line-height:1.22;letter-spacing:-.025em;margin:.62rem 0 .76rem;color:var(--ds-heading,var(--ds-text,#12233a))}
.hf-heading p{max-width:840px;font-size:1.06rem;line-height:1.85;margin:0;color:var(--ds-text-muted,#586c82)}
/* एक ही वास्तविक ग्रिड: 1 = पढ़ाई, 2 = उपयोगी तथ्य। तीसरा स्तंभ कभी नहीं। */
.hf-layout{display:grid;grid-template-columns:minmax(0,1fr) 288px;gap:clamp(19px,3vw,38px);align-items:start}
.hf-reading{min-width:0;background:var(--ds-surface,#fff);border:1px solid var(--ds-border,#dee7ef);border-radius:17px;padding:clamp(22px,3vw,43px);box-shadow:0 5px 21px rgba(18,40,66,.035);font-size:1.035rem;line-height:1.95;overflow-wrap:anywhere}
.hf-reading h2{color:var(--ds-heading,var(--ds-text,#172d45));font-size:clamp(1.38rem,2vw,1.78rem);line-height:1.46;margin:2.4rem 0 .85rem;padding-top:1rem;border-top:1px solid var(--ds-border,#e1e7ed);scroll-margin-top:95px}
.hf-reading h2:first-of-type{border-top:0;padding-top:0;margin-top:1rem}
.hf-reading h3{color:var(--ds-heading,var(--ds-text,#172d45));font-size:1.17rem;line-height:1.55;margin:1.65rem 0 .55rem}
.hf-reading p{margin:.55rem 0 1.1rem;color:var(--ds-text,#253750)}
.hf-reading strong,.hf-reading b{font-weight:780;color:var(--ds-heading,var(--ds-text,#172d45))}
.hf-reading ul,.hf-reading ol{padding-inline-start:1.6rem;margin:.4rem 0 1.15rem}
.hf-reading li{margin:.38rem 0;color:var(--ds-text,#253750)}
.hf-reading a{color:var(--ds-primary,#2563eb);text-decoration:underline;text-underline-offset:3px}
.hf-reading .hf-lead{font-size:1.085rem;line-height:1.97;color:var(--ds-text,#283a50);margin-top:0}
.hf-reading .hf-callout{border-inline-start:4px solid var(--ds-primary,#2563eb);background:var(--ds-surface-soft,#edf3f9);padding:1rem 1.2rem;margin:1.4rem 0;border-radius:0 12px 12px 0;color:var(--ds-text,#253750)}
.hf-reading .hf-callout p{margin:.2rem 0}
.hf-table-scroll{overflow-x:auto;max-width:100%;margin:1rem 0 1.5rem;border-radius:11px;border:1px solid var(--ds-border,#d9e1e9)}
.hf-reading table{width:100%;border-collapse:collapse;min-width:570px;font-size:.94rem;line-height:1.7;background:var(--ds-surface,#fff)}
.hf-reading th{text-align:start;background:var(--ds-surface-soft,#e9f0f6);font-weight:750;color:var(--ds-heading,var(--ds-text,#162c43))}
.hf-reading th,.hf-reading td{border-bottom:1px solid var(--ds-border,#d8e0e8);padding:.72rem .8rem;vertical-align:top}
.hf-reading tr:last-child td{border-bottom:0}
.hf-chapter-links{display:flex;flex-wrap:wrap;gap:.65rem;margin:1.8rem 0 .6rem}
.hf-chapter-links a{display:inline-flex;align-items:center;gap:.3rem;background:var(--ds-surface-soft,#f0f4f8);border:1px solid var(--ds-border,#dbe3eb);border-radius:9px;padding:.6rem .8rem;text-decoration:none;font-size:.91rem}
.hf-facts{min-width:0;position:sticky;top:88px;align-self:start;display:grid;gap:13px}
.hf-facts-header{padding:.3rem .25rem;font-size:.86rem;font-weight:800;color:var(--ds-text-muted,#516479);letter-spacing:.03em}
.hf-fact{border:1px solid var(--ds-border,#dee4eb);border-radius:13px;padding:1.02rem 1.08rem;background:var(--ds-surface,#fff)}
.hf-fact h2{font-size:1rem;font-weight:800;margin:0 0 .65rem;color:var(--ds-heading,var(--ds-text,#182d44));line-height:1.5}
.hf-fact p,.hf-fact li{color:var(--ds-text,#25364e);font-size:.91rem;line-height:1.76;margin:.3rem 0}
.hf-fact ul{margin:0;padding-inline-start:1.1rem}
.hf-fact strong{color:var(--ds-heading,var(--ds-text,#182d44))}
.hf-fact a{color:var(--ds-primary,#245fa8)}
.hf-practice{background:var(--ds-surface-soft,#f2f6fa);border:1px solid var(--ds-border,#dfe6ee);padding:1.1rem 1.4rem;border-radius:13px;margin:1.2rem 0}
.hf-practice h2{border:0;padding:0;margin:0 0 .7rem;font-size:1.18rem}
.hf-sources{margin-top:2rem;border-top:1px solid var(--ds-border,#dfe6ec);padding-top:1rem}
.hf-sources h2{border:0;margin:.6rem 0;font-size:1.16rem;padding:0}
.hf-sources li{font-size:.94rem;overflow-wrap:anywhere}
.hf-footnav{margin:1.4rem 0;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.hf-footnav a{padding:.8rem 1rem;border:1px solid var(--ds-border,#dbe4ed);background:var(--ds-surface,#fff);border-radius:10px;text-decoration:none;color:var(--ds-primary,#2563eb);font-weight:740}
html[data-theme="dark"] body.history-foundation-page .hf-reading,
html[data-theme="dark"] body.history-foundation-page .hf-fact{box-shadow:none}
@media(max-width:1020px){.hf-layout{grid-template-columns:minmax(0,1fr) 250px;gap:18px}.hf-reading{padding:24px}}
@media(max-width:760px){.hf-shell{width:calc(100% - 24px);margin-top:1rem}.hf-layout{grid-template-columns:minmax(0,1fr)}.hf-reading{padding:18px;border-radius:13px}.hf-facts{position:static;grid-template-columns:minmax(0,1fr);margin-top:0}.hf-heading h1{font-size:1.85rem}.hf-reading h2{font-size:1.37rem}.hf-crumb{font-size:.8rem}}
@media(prefers-reduced-motion:reduce){.hf-reading *{scroll-behavior:auto}}