/* Standalone site header/footer for slpastpapers.com */
:root{--spp-ink:#102e4e;--spp-blue:#0b74e7;--spp-green:#0f9b78;--spp-muted:#66788d;--spp-line:#e1eaf2;--spp-soft:#f4f8fc}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
.spp-site-body{margin:0;background:#fff;color:var(--spp-ink);font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.5}
.spp-skip-link{position:absolute;left:12px;top:-60px;z-index:1000;background:#fff;color:var(--spp-ink);padding:10px 14px;border-radius:10px;box-shadow:0 4px 14px #102e4e22}
.spp-skip-link:focus{top:12px}
.spp-header{position:relative;z-index:50;width:100%;background:rgba(255,255,255,.97);border-bottom:1px solid #e7edf4;box-shadow:0 4px 22px rgba(20,54,86,.045)}
.spp-header-inner{width:min(1200px,calc(100% - 36px));min-height:78px;margin:0 auto;display:flex;align-items:center;gap:26px}
.spp-brand{display:inline-flex;align-items:center;gap:11px;min-width:max-content;color:var(--spp-ink);text-decoration:none}
.spp-brand-mark{width:43px;height:43px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(145deg,#e5f2ff,#e3f8f2);font-size:23px}
.spp-brand-copy{display:flex;flex-direction:column;line-height:1.2}
.spp-brand-copy strong{font-size:17px;font-weight:850;letter-spacing:-.35px}
.spp-brand-copy small{margin-top:5px;color:#728398;font-size:10px;font-weight:650;letter-spacing:.25px}
.spp-desktop-nav{display:flex;align-items:center;justify-content:center;gap:clamp(12px,1.7vw,24px);margin-left:auto}
.spp-desktop-nav a{color:#4b6179;text-decoration:none;font-size:13px;font-weight:750;white-space:nowrap;transition:color .18s ease}
.spp-desktop-nav a:hover,.spp-desktop-nav a:focus-visible{color:var(--spp-blue)}
.spp-header-search{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:42px;padding:0 15px;border-radius:12px;background:var(--spp-blue);color:#fff!important;text-decoration:none;font-size:13px;font-weight:800;box-shadow:0 5px 14px #0b74e72b;white-space:nowrap;transition:transform .18s ease,box-shadow .18s ease}
.spp-header-search:hover{transform:translateY(-1px);box-shadow:0 8px 19px #0b74e738}
.spp-header-search span{font-size:19px;line-height:1}
.spp-mobile-nav{display:none;position:relative;margin-left:auto}
.spp-mobile-nav summary{list-style:none;display:flex;align-items:center;gap:7px;min-height:40px;padding:0 12px;border:1px solid var(--spp-line);border-radius:10px;cursor:pointer;color:var(--spp-ink);font-size:13px;font-weight:800}
.spp-mobile-nav summary::-webkit-details-marker{display:none}
.spp-menu-icon{font-size:18px}
.spp-mobile-panel{position:absolute;right:0;top:calc(100% + 10px);width:min(280px,calc(100vw - 28px));padding:8px;background:#fff;border:1px solid var(--spp-line);border-radius:15px;box-shadow:0 18px 45px #102e4e20;display:grid;gap:2px}
.spp-mobile-panel a{padding:12px;border-radius:9px;color:#354e68;text-decoration:none;font-size:14px;font-weight:750}
.spp-mobile-panel a:hover{background:#f0f7ff;color:var(--spp-blue)}
.spp-site-content{min-height:45vh}
.spp-footer{margin-top:48px;background:#0d2742;color:#e5eef7}
.spp-footer-inner{width:min(1200px,calc(100% - 36px));margin:0 auto;padding:38px 0 30px;display:grid;grid-template-columns:minmax(240px,1.5fr) 1fr 1fr;gap:42px}
.spp-footer-brand{max-width:340px}
.spp-footer-logo{display:inline-block;color:#fff;font-size:19px;font-weight:850;letter-spacing:-.35px;text-decoration:none}
.spp-footer-brand p{max-width:300px;margin:12px 0 0;color:#b4c5d6;font-size:13px;line-height:1.8}
.spp-footer-links{display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.spp-footer-links strong{margin:2px 0 4px;color:#fff;font-size:13px}
.spp-footer-links a{color:#bbcad9;text-decoration:none;font-size:13px;transition:color .18s ease}
.spp-footer-links a:hover{color:#fff}
.spp-footer-bottom{width:min(1200px,calc(100% - 36px));min-height:55px;margin:0 auto;border-top:1px solid #ffffff20;display:flex;align-items:center;justify-content:space-between;gap:14px;color:#a6b9cc;font-size:11px}
@media(max-width:1050px){.spp-header-inner{gap:15px}.spp-desktop-nav{gap:13px}.spp-brand-copy small{display:none}.spp-brand-copy strong{font-size:16px}}
@media(max-width:860px){.spp-header-inner{min-height:70px;width:calc(100% - 28px)}.spp-desktop-nav{display:none}.spp-mobile-nav{display:block}.spp-header-search{margin-left:auto;min-height:40px;padding:0 12px}.spp-footer-inner{grid-template-columns:1.3fr 1fr 1fr;gap:24px}}
@media(max-width:560px){.spp-header-inner{gap:9px}.spp-brand{gap:8px}.spp-brand-mark{width:38px;height:38px;border-radius:12px;font-size:20px}.spp-brand-copy strong{font-size:14px}.spp-header-search{font-size:0;width:40px;padding:0;gap:0}.spp-header-search span{font-size:21px}.spp-mobile-nav summary{width:40px;justify-content:center;padding:0;font-size:0}.spp-footer-inner{padding:30px 0 24px;grid-template-columns:1fr 1fr;gap:26px 18px}.spp-footer-brand{grid-column:1/-1;max-width:none}.spp-footer-brand p{max-width:420px}.spp-footer-bottom{width:calc(100% - 28px);min-height:62px;align-items:flex-start;justify-content:center;flex-direction:column;gap:3px;padding:12px 0}.spp-footer{margin-top:34px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}