*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#101b2d;color:#f6f3ec;font-family:Arial,Helvetica,sans-serif;min-height:100vh;display:flex;flex-direction:column}.top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:32px max(7vw,24px);letter-spacing:.12em;font-size:13px}.right{display:flex;align-items:center;gap:22px}.gold{color:#d7b475}.hero{flex:1;display:flex;flex-direction:column;justify-content:center;max-width:950px;width:100%;padding:55px max(7vw,24px)}h1{font-size:clamp(54px,10vw,120px);line-height:1.02;letter-spacing:-.055em;margin:0 0 30px}h2{font-size:clamp(25px,4vw,48px);line-height:1.15;font-weight:400;margin:0 0 20px;color:#d7b475}p{font-size:clamp(16px,2vw,20px);line-height:1.6;color:#c9d2e0;max-width:650px}.eyebrow{text-transform:uppercase;letter-spacing:.16em;color:#d7b475;font-size:12px;font-weight:bold;line-height:1.7}hr{border:0;border-top:1px solid #4d5a6b;margin:30px 0 14px}footer{padding:30px max(7vw,24px);color:#a9b5c5;font-size:12px}.languages{display:flex;gap:8px;align-items:center;letter-spacing:0}.languages a{font-size:23px;line-height:1;text-decoration:none;padding:6px;border:1px solid transparent;border-radius:6px;transition:background .2s}.languages a:hover,.languages a:focus-visible{background:#29374b;outline:none}.languages a[aria-current="page"]{border-color:#d7b475;background:#273346}@media(max-width:600px){.top{padding-top:22px;align-items:flex-start}.right{flex-direction:column-reverse;gap:6px;align-items:flex-end}.top strong{padding-top:9px}.hero{padding-top:45px;padding-bottom:45px}.eyebrow{letter-spacing:.11em}}
/* Additions: original landing page styles retained */
.cta-link{display:inline-block;align-self:flex-start;margin-top:8px;color:#d7b475;border-bottom:1px solid #d7b475;text-decoration:none;font-size:13px;font-weight:bold;letter-spacing:.14em;padding:10px 0}.cta-link:hover,.cta-link:focus-visible{color:#fff;border-color:#fff}.library{max-width:1050px;width:100%;margin:0 auto;padding:48px max(7vw,24px) 90px}.library h1{font-size:clamp(42px,7vw,80px);margin:20px 0 16px}.library .intro{margin-bottom:40px}.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.distinction-card{min-height:145px;padding:22px;border:1px solid #4d5a6b;text-decoration:none;display:flex;flex-direction:column;justify-content:space-between;gap:18px;transition:border-color .2s,background .2s}.distinction-card:hover,.distinction-card:focus-visible{border-color:#d7b475;background:#1a293d}.card-number{color:#d7b475;font-size:12px;letter-spacing:.16em}.card-title{font-size:clamp(15px,2.3vw,22px);font-weight:bold;color:#f6f3ec;line-height:1.3}.card-title em{color:#d7b475;font-style:normal}.detail{max-width:900px;width:100%;margin:auto;padding:65px max(7vw,24px)}.detail h1{font-size:clamp(35px,6vw,75px);letter-spacing:-.035em;line-height:1.15;margin:20px 0 35px}.detail h1 em{color:#d7b475;font-style:normal}.detail h2{font-size:clamp(24px,3vw,38px)}.detail p{max-width:750px}.detail-nav{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:65px}.detail-nav a,.back-link{color:#d7b475;text-decoration:none;font-size:13px;letter-spacing:.07em}.detail-nav a:hover,.back-link:hover{text-decoration:underline}@media(max-width:600px){.card-grid{grid-template-columns:1fr}.distinction-card{min-height:115px}}

/* Series navigation and interactive flashcards */
.series-link{text-decoration:none;font-weight:600;white-space:nowrap}.series-link:hover,.series-link:focus-visible{text-decoration:underline;color:#fff}
.flash-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:34px}
.flashcard{min-width:0;min-height:250px;perspective:900px}
.flashcard details{height:100%;border:1px solid #657085;border-radius:14px;background:linear-gradient(145deg,#1c2d48,#111f35);box-shadow:0 10px 24px #050b1640;overflow:hidden;transition:border-color .2s,transform .2s}
.flashcard details:hover{border-color:#d7b475;transform:translateY(-3px)}
.flash-front{list-style:none;min-height:250px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:28px;padding:30px 18px;cursor:pointer;text-align:center}
.flash-front::-webkit-details-marker{display:none}.flash-front .card-title{font-size:clamp(18px,2.1vw,27px);letter-spacing:-.025em}.flash-front .card-number{font-size:14px}
.flip-hint{font-size:10px;letter-spacing:.17em;color:#aebdd0}
.flashcard details[open] .flash-front{min-height:auto;padding:18px 16px 8px;gap:8px;border-bottom:1px solid #4d5a6b}.flashcard details[open] .flash-front .card-title{font-size:13px}.flashcard details[open] .flip-hint{display:none}
.flash-back{min-height:165px;padding:24px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:20px;text-align:center}
.flash-question{font-size:clamp(18px,2.2vw,25px);line-height:1.3;color:#f6f3ec}.flash-view{font-size:11px;font-weight:700;letter-spacing:.12em;color:#d7b475;text-decoration:none;border-bottom:1px solid #d7b475;padding:8px}.flash-view:hover{color:white;border-color:white}
@media(max-width:650px){.flash-grid{grid-template-columns:1fr;gap:15px}.flashcard,.flash-front{min-height:205px}}

/* 2026-10-15: compact, visibly boxed two-column flashcards */
.flash-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
.flashcard{min-height:140px;height:140px;perspective:none}
.flashcard details{height:100%;min-height:140px;position:relative;border:1px solid #526181;border-radius:7px;background:#1c2a50;box-shadow:none;overflow:hidden;transition:border-color .2s,background .2s}
.flashcard details:hover{transform:none;background:#23345e;border-color:#d7b475}
.flash-front{min-height:0;height:100%;box-sizing:border-box;display:flex;align-items:flex-start;justify-content:flex-start;gap:17px;padding:18px;cursor:pointer;text-align:left}
.flash-front .card-number{font-size:13px;letter-spacing:0}
.flash-front .card-title{font-size:clamp(13px,1.55vw,17px);letter-spacing:0;line-height:1.4}
.flip-hint{margin-top:auto;align-self:flex-end;font-size:11px;letter-spacing:.04em;color:#d7b475}
.flashcard details[open] .flash-front{position:absolute;inset:0;min-height:0;height:100%;padding:0;border:0;opacity:0;pointer-events:none}
.flashcard details[open] .flash-back{height:100%;min-height:0;padding:12px 22px;box-sizing:border-box;gap:9px}
.flash-question{font-size:clamp(15px,1.7vw,19px);line-height:1.25}
.flash-view{font-size:10px;padding:3px}
@media(max-width:650px){.flash-grid{grid-template-columns:1fr;gap:12px}.flashcard,.flashcard details{min-height:140px;height:140px}}