:root{--by-navy:#102a43;--by-navy2:#183b56;--by-gold:#d6a84a;--by-cream:#fff9ee;--by-paper:#fffdf8;--by-ink:#17324d;--by-muted:#66788a;--by-line:#eadfc8;--by-shadow:0 16px 38px rgba(16,42,67,.12)}
.birth-year-page{background:linear-gradient(#fffaf1,#f7fbff 28%,#fffdf8);color:var(--by-ink)}
.by-progress{position:fixed;top:0;left:0;width:0;height:4px;background:linear-gradient(90deg,var(--by-gold),#f4d98e);z-index:9999}
.by2-hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(circle at 80% 20%,rgba(214,168,74,.22),transparent 28%),linear-gradient(135deg,#0d2238 0%,#173a59 56%,#214e6e 100%);padding:56px 0 70px;border-bottom:5px solid var(--by-gold)}
.by2-hero:after{content:"";position:absolute;inset:0;background-image:radial-gradient(circle,rgba(255,255,255,.28) 1px,transparent 1px);background-size:34px 34px;opacity:.16;pointer-events:none}
.by2-hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.4fr .75fr;gap:38px;align-items:center}
.by2-kicker{display:inline-flex;gap:8px;align-items:center;padding:8px 14px;border:1px solid rgba(255,255,255,.28);border-radius:999px;background:rgba(255,255,255,.08);font-weight:800;font-size:.82rem;letter-spacing:.04em;text-transform:uppercase}
.by2-year{font-family:Georgia,'Times New Roman',serif;font-size:clamp(5.5rem,12vw,10rem);line-height:.82;color:#f4cf74;text-shadow:0 4px 18px rgba(0,0,0,.18);margin:24px 0 8px}
.by2-hero h1{font-family:Georgia,'Times New Roman',serif;font-size:clamp(2rem,4vw,3.7rem);margin:0 0 18px;color:#fff7df}
.by2-hero p{font-size:1.08rem;line-height:1.75;max-width:780px;color:#edf5fb}
.by2-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.by2-btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border-radius:12px;padding:13px 18px;font-weight:850;border:1px solid rgba(255,255,255,.28)}.by2-btn.gold{background:#f0c45e;color:#132d45;border-color:#f0c45e}.by2-btn.ghost{color:#fff;background:rgba(255,255,255,.08)}
.by2-seal{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.22);border-radius:28px;padding:24px;backdrop-filter:blur(8px);box-shadow:0 22px 55px rgba(0,0,0,.18)}
.by2-seal-ring{width:148px;height:148px;border:2px solid #f0c45e;border-radius:50%;display:grid;place-items:center;margin:auto;box-shadow:inset 0 0 0 10px rgba(240,196,94,.09)}.by2-seal-ring strong{font-family:Georgia,serif;font-size:4.2rem;color:#ffe7a4}.by2-seal h2{text-align:center;color:#fff8df;font-family:Georgia,serif;margin:18px 0 7px}.by2-seal p{text-align:center;font-size:.92rem;margin:0;color:#d9e6ef}
.by2-snapshot{margin-top:-28px;position:relative;z-index:3;display:grid;grid-template-columns:repeat(6,1fr);background:#fff;border:1px solid var(--by-line);border-radius:20px;box-shadow:var(--by-shadow);overflow:hidden}.by2-snap{padding:19px 14px;text-align:center;border-right:1px solid #efe7d7}.by2-snap:last-child{border-right:0}.by2-snap .ico{display:block;font-size:1.55rem;margin-bottom:5px}.by2-snap strong{display:block;color:#183956;font-size:.96rem}.by2-snap span:last-child{display:block;color:#7b7b73;font-size:.76rem;margin-top:3px}
.by2-main{padding:34px 0 60px}.by2-section{margin:34px 0}.by2-heading{display:flex;gap:14px;align-items:center;margin-bottom:15px}.by2-heading .icon{width:46px;height:46px;border-radius:15px;display:grid;place-items:center;background:linear-gradient(145deg,#fff6d7,#f5d273);font-size:1.4rem;box-shadow:0 7px 18px rgba(214,168,74,.18)}.by2-heading h2{font-family:Georgia,serif;margin:0;color:#17324d;font-size:1.85rem}.by2-heading p{margin:3px 0 0;color:#697b8c}
.by2-panel{background:var(--by-paper);border:1px solid var(--by-line);border-radius:22px;box-shadow:0 10px 28px rgba(16,42,67,.075);padding:24px}
.by2-glance{display:grid;grid-template-columns:1.05fr 1fr;gap:20px}.by2-editorial{background:linear-gradient(140deg,#fff4cf,#fffdf5);border:1px solid #ead8a5;border-radius:18px;padding:24px}.by2-editorial h3{font-family:Georgia,serif;color:#654c18;font-size:1.5rem;margin-top:0}.by2-editorial p{line-height:1.78}.by2-glance-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.by2-fact{border-radius:16px;padding:17px;background:#eef7ff;border:1px solid #dbeaf6}.by2-fact:nth-child(2){background:#fff0f5;border-color:#f4dce5}.by2-fact:nth-child(3){background:#f0f8ec;border-color:#dcebd3}.by2-fact:nth-child(4){background:#f4f0ff;border-color:#e3dcf7}.by2-fact .ico{font-size:1.45rem}.by2-fact b{display:block;margin:6px 0 4px;color:#17324d}.by2-fact small{color:#687989;line-height:1.45}
.by2-memory-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.by2-memory{border-radius:16px;padding:18px;background:#fff;border:1px solid #e8e2d6}.by2-memory b{display:block;color:#17324d;margin:7px 0}.by2-memory p{margin:0;color:#657586;font-size:.89rem;line-height:1.55}
.by2-timeline{position:relative;padding-left:16px}.by2-event{display:grid;grid-template-columns:86px 16px 1fr;gap:14px;padding:12px 0}.by2-event-date{font-weight:900;color:#9d6f10}.by2-event-dot{width:12px;height:12px;border-radius:50%;background:#d6a84a;margin-top:7px;box-shadow:0 0 0 5px #fff2cc}.by2-event h3{margin:0 0 5px;color:#17324d;font-size:1.05rem}.by2-event p{margin:0;color:#687989;line-height:1.58}
.by2-culture-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.by2-culture-card{border-radius:18px;padding:20px;background:#fff;border:1px solid #e7e1d6;min-height:150px}.by2-culture-card:nth-child(1){background:#fff3f7}.by2-culture-card:nth-child(2){background:#eef7ff}.by2-culture-card:nth-child(3){background:#f0f8ed}.by2-culture-card:nth-child(4){background:#fff6df}.by2-culture-card:nth-child(5){background:#f4f0ff}.by2-culture-card:nth-child(6){background:#eef9f7}.by2-culture-card .ico{font-size:1.55rem}.by2-culture-card h3{margin:8px 0 6px;color:#17324d}.by2-culture-card p{margin:0;color:#66788a;line-height:1.55;font-size:.9rem}
.by2-compare-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.by2-compare{overflow:hidden;border:1px solid #e4ddcf;border-radius:17px;background:#fff}.by2-compare h3{margin:0;padding:13px 16px;background:#173b59;color:#fff;font-size:1rem}.by2-compare .row{display:grid;grid-template-columns:68px 1fr;gap:10px;padding:12px 15px;border-top:1px solid #eee5d4}.by2-compare .row b{color:#9b711a;font-size:.78rem;text-transform:uppercase}.by2-compare .row span{color:#566b7d;font-size:.88rem;line-height:1.45}
.by2-age-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.by2-age-card,.by2-recall{border-radius:19px;padding:23px}.by2-age-card{background:linear-gradient(145deg,#173b59,#102a43);color:#fff}.by2-age-card h3,.by2-recall h3{margin-top:0}.by2-age-number{font-family:Georgia,serif;color:#f3cf78;font-size:3.2rem;font-weight:800;margin:8px 0}.by2-exact-form{display:grid;grid-template-columns:1fr 1fr auto;gap:8px;margin-top:16px}.by2-exact-form select,.by2-exact-form button{border-radius:10px;padding:10px;border:1px solid rgba(255,255,255,.25)}.by2-exact-form button{background:#efc45f;color:#17324d;font-weight:900}.by2-age-result{margin-top:12px;padding:11px 13px;border-radius:11px;background:rgba(255,255,255,.08);font-size:.9rem}.by2-recall{background:#fff5dd;border:1px solid #ead8a5}.by2-recall ul{margin:0;padding-left:20px;color:#615d55;line-height:1.8}.by2-note{font-size:.78rem;color:#766d5e;margin-top:12px}
.by2-sources{display:grid;gap:10px}.by2-source{display:flex;gap:12px;align-items:flex-start;padding:13px 14px;border-radius:13px;background:#f7fbff;border:1px solid #dfeaf2}.by2-source a{color:#1f5274;font-weight:800}.by2-source small{display:block;color:#6c7d8a;margin-top:2px}
.by2-discovery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.by2-discovery a{text-decoration:none;border:1px solid #e3dccf;border-radius:16px;background:#fff;padding:17px;color:#17324d;transition:.2s}.by2-discovery a:hover{transform:translateY(-2px);box-shadow:0 10px 20px rgba(16,42,67,.09)}.by2-discovery span{font-size:1.35rem;display:block}.by2-discovery b{display:block;margin:6px 0 3px}.by2-discovery small{color:#6b7b88}
@media(max-width:900px){.by2-hero-grid,.by2-glance,.by2-age-grid{grid-template-columns:1fr}.by2-snapshot{grid-template-columns:repeat(3,1fr)}.by2-culture-grid,.by2-compare-grid{grid-template-columns:repeat(2,1fr)}.by2-discovery{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.by2-hero{padding-top:38px}.by2-year{font-size:5.7rem}.by2-snapshot{grid-template-columns:repeat(2,1fr);margin-top:-18px}.by2-memory-strip,.by2-culture-grid,.by2-compare-grid,.by2-discovery{grid-template-columns:1fr}.by2-event{grid-template-columns:64px 14px 1fr}.by2-exact-form{grid-template-columns:1fr 1fr}.by2-exact-form button{grid-column:1/-1}.by2-panel{padding:18px}}