.reader-main{min-height:calc(100vh - 160px);background:#f6f1e6;padding:22px 3% 34px}.reader-heading{display:flex;align-items:center;justify-content:space-between;gap:18px;width:min(1200px,100%);margin:0 auto 14px}.reader-heading h1{margin:0;color:var(--navy);font-size:clamp(1.55rem,3vw,2.25rem)}.reader-heading p{margin:3px 0 0;color:#5d6570}.reader-back{display:inline-flex;align-items:center;gap:6px;white-space:nowrap;padding:10px 14px;border-radius:8px;background:#e7eef2;color:var(--navy);font-weight:700;text-decoration:none}.reader-frame{display:block;width:min(1200px,100%);height:calc(100vh - 230px);min-height:600px;margin:0 auto;border:1px solid #cbd5dc;border-radius:10px;background:#fff;box-shadow:0 8px 28px #183c6220}.reader-fallback{text-align:center;margin:14px 0 0}.reader-fallback a{color:#206996;font-weight:700}@media(max-width:640px){.reader-main{padding:14px 0 0}.reader-heading{padding:0 12px}.reader-heading h1{font-size:1.35rem}.reader-heading p{font-size:.85rem}.reader-back{padding:8px 10px;font-size:.85rem}.reader-frame{height:calc(100vh - 185px);min-height:520px;border-width:1px 0 0;border-radius:0}.reader-fallback{padding:0 12px 14px}}