/* ===== TỦ SÁCH TÌNH KTS (16/10/2026) — chỉ nạp ở trang sách; dùng biến màu của style.css ===== */

/* --- Khung đọc lật trang --- */
.ls-doc{position:relative;max-width:1100px;margin:0 auto;outline:none}
.ls-san{position:relative;display:flex;justify-content:center;gap:0;aspect-ratio:3/4.4;max-height:78vh;margin:0 auto;perspective:1800px}
.ls-doc.ls-hai .ls-san{aspect-ratio:6/4.4}
.ls-trang{position:relative;flex:1;max-width:100%;background:#fff;border-radius:6px;overflow:hidden;box-shadow:0 24px 60px rgba(0,0,0,.5)}
.ls-trang:empty{display:none}
.ls-doc.ls-hai .ls-t1{border-radius:6px 0 0 6px;box-shadow:-14px 24px 60px rgba(0,0,0,.45),inset -18px 0 26px -18px rgba(0,0,0,.35)}
.ls-doc.ls-hai .ls-t2{border-radius:0 6px 6px 0;box-shadow:14px 24px 60px rgba(0,0,0,.45),inset 18px 0 26px -18px rgba(0,0,0,.25)}
.ls-trang img{display:block;width:100%;height:100%;object-fit:contain;background:#fff}
.ls-doc:not(.ls-hai) .ls-san{max-width:min(560px,100%)}
.ls-lat-t .ls-t2,.ls-lat-t:not(.ls-hai) .ls-t1{animation:lsLatT .45s var(--ease,ease)}
.ls-lat-p .ls-t1{animation:lsLatP .45s var(--ease,ease)}
@keyframes lsLatT{from{transform:rotateY(-24deg);transform-origin:left center;opacity:.35}to{transform:none;opacity:1}}
@keyframes lsLatP{from{transform:rotateY(24deg);transform-origin:right center;opacity:.35}to{transform:none;opacity:1}}
.ls-mep{position:absolute;top:0;bottom:0;width:22%;background:transparent;border:0;cursor:pointer;z-index:2}
.ls-trai{left:0}.ls-phai{right:0}
.ls-thanh{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:18px}
.ls-nut{width:44px;height:44px;border-radius:50%;border:1px solid var(--line-gold);background:rgba(255,255,255,.04);color:var(--gold);font-size:1.5rem;line-height:1;cursor:pointer;transition:background .2s}
.ls-nut:hover{background:rgba(201,169,110,.15)}
.ls-so{min-width:96px;text-align:center;color:inherit;opacity:.8;font-family:var(--cond);letter-spacing:.06em}
.ls-het{display:grid;place-items:center;height:100%;padding:28px;text-align:center;background:linear-gradient(160deg,#14171d,#0b0c0f);color:#fff}
.ls-het b{display:block;font-family:var(--cond);font-size:1.5rem;text-transform:uppercase;color:var(--gold);margin-bottom:10px}
.ls-het p{color:var(--ink-soft);margin:0 0 18px}
.ls-doc:fullscreen{background:#0b0c0f;padding:24px;display:flex;flex-direction:column;justify-content:center}
.ls-doc:fullscreen .ls-san{max-height:86vh}
.ls-doc .bk-khoa{position:relative;inset:auto;min-height:520px;border-radius:18px;border:1px solid var(--line-gold)}

/* --- Bước 6: lợi ích (nỗi đau → lời giải) --- */
.ts-loi{display:grid;gap:14px;max-width:960px;margin:0 auto}
.ts-loi .it{display:grid;grid-template-columns:1fr 34px 1fr;gap:14px;align-items:center;padding:16px 18px;border:1px solid rgba(176,141,87,.3);border-radius:14px;background:rgba(176,141,87,.05)}
.ts-loi .dau{color:inherit;opacity:.75}
.ts-loi .mui{color:var(--gold);font-size:1.4rem;text-align:center}
.ts-loi .giai{color:inherit;font-weight:500}
.ts-loi .giai b{color:var(--gold)}
@media(max-width:700px){.ts-loi .it{grid-template-columns:1fr}.ts-loi .mui{transform:rotate(90deg)}}

/* --- Bước 7: cảnh tương lai --- */
.ts-canh{max-width:820px;margin:0 auto;padding:30px 32px;border-left:3px solid var(--gold);background:linear-gradient(90deg,rgba(201,169,110,.08),transparent);border-radius:0 16px 16px 0;font-size:1.08rem;line-height:1.85;color:inherit}

/* --- Bước 8: rõ ràng / Bước 13: giá trị cộng dồn --- */
.ts-ro{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;max-width:1000px;margin:0 auto}
.ts-ro .o{padding:18px;border:1px solid var(--line);border-radius:14px;text-align:center}
.ts-ro .o b{display:block;font-family:var(--cond);font-size:1.6rem;color:var(--gold);letter-spacing:.02em}
.ts-ro .o span{color:inherit;opacity:.75;font-size:.95rem}
.ts-stack{max-width:760px;margin:0 auto;border:1px solid var(--line-gold);border-radius:18px;overflow:hidden}
.ts-stack .d{display:flex;justify-content:space-between;gap:16px;padding:14px 20px;border-bottom:1px solid var(--line)}
.ts-stack .d span{color:inherit}.ts-stack .d span small{display:block;opacity:.65;font-size:.85rem;margin-top:2px}
.ts-stack .d b{opacity:.8;white-space:nowrap;font-weight:500}
.ts-stack .tong{display:flex;justify-content:space-between;padding:16px 20px;background:rgba(201,169,110,.08)}
.ts-stack .tong b{font-family:var(--cond);font-size:1.25rem}
.ts-stack .nay{display:flex;justify-content:space-between;align-items:baseline;padding:18px 20px;background:rgba(201,169,110,.16)}
.ts-stack .nay b{font-family:var(--cond);font-size:2rem;color:var(--gold)}
.ts-stack .ghi{padding:12px 20px;color:var(--muted);font-size:.85rem}

/* --- Bước 10: xử lý từ chối --- */
.ts-tu-choi{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;max-width:1100px;margin:0 auto}
.ts-tu-choi .o{padding:22px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.02)}
.ts-tu-choi .o h3{font-size:1.05rem;color:inherit;margin:0 0 10px;font-family:var(--sans);font-weight:700}
.ts-tu-choi .o h3::before{content:"“";color:var(--gold);font-size:1.6rem;margin-right:4px;vertical-align:-4px}
.ts-tu-choi .o p{color:inherit;opacity:.82;margin:0;line-height:1.75}

/* --- Bước 11–12: lý do mua + giới hạn thật --- */
.ts-ly-do{max-width:820px;margin:0 auto;text-align:center}
.ts-ly-do p{color:inherit;font-size:1.05rem;line-height:1.8}
.ts-han{display:inline-block;margin-top:14px;padding:10px 18px;border:1px dashed var(--gold);border-radius:999px;color:var(--gold);font-family:var(--cond);letter-spacing:.05em}

/* --- Bước 14: quà kèm --- */
.ts-qua{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;max-width:1100px;margin:0 auto}
.ts-qua .o{position:relative;padding:24px 20px 20px;border:1px solid var(--line-gold);border-radius:16px;background:linear-gradient(160deg,rgba(201,169,110,.08),transparent)}
.ts-qua .o .so{position:absolute;top:-12px;left:18px;padding:2px 10px;border-radius:999px;background:var(--gold);color:#111;font-size:.78rem;font-weight:700;letter-spacing:.05em}
.ts-qua .o h3{font-size:1.05rem;color:inherit;margin:6px 0 8px;font-family:var(--sans)}
.ts-qua .o p{color:inherit;opacity:.82;margin:0;font-size:.95rem;line-height:1.7}
.ts-qua .o .gt{display:block;margin-top:10px;color:var(--gold);font-size:.9rem}

/* --- Bước 15: bằng chứng (chỉ dùng thứ có thật) --- */
.ts-that{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;max-width:1100px;margin:0 auto}
.ts-that figure{margin:0;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.ts-that img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.ts-that figcaption{padding:10px 14px;color:inherit;opacity:.8;font-size:.9rem}

/* --- Bước 16: cam kết dưới nút --- */
.ts-cam-ket{display:flex;gap:10px;align-items:flex-start;max-width:640px;margin:16px auto 0;color:inherit;opacity:.85;font-size:.92rem;text-align:left}
.ts-cam-ket::before{content:"✓";color:var(--gold);font-weight:700}

/* --- Thẻ sách nhỏ trong tủ sách / sách liên quan --- */
.ts-lien{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;max-width:1100px;margin:0 auto}
.ts-lien a{display:block;padding:16px;border:1px solid var(--line);border-radius:16px;text-align:center;transition:border-color .2s,transform .2s}
.ts-lien a:hover{border-color:var(--gold);transform:translateY(-3px)}
.ts-lien img{width:62%;height:auto;border-radius:3px 6px 6px 3px;box-shadow:-6px 12px 28px rgba(0,0,0,.5)}
.ts-lien b{display:block;margin-top:12px;color:inherit;font-size:.98rem}
.ts-lien span{color:var(--gold);font-size:.9rem}