.TextbooksBrowser_browser__lHQ9o{margin-top:24px}.TextbooksBrowser_levelTabs__jtDg7{display:flex;justify-content:center;gap:8px;margin-bottom:20px}.TextbooksBrowser_levelTabActive__30ole,.TextbooksBrowser_levelTab__dqL6H{padding:10px 28px;border-radius:10px;border:1px solid var(--color-border,#e5e7eb);background:var(--color-surface,#fff);color:var(--color-text-secondary,#4b5563);font-size:1rem;font-weight:600;cursor:pointer;transition:background .15s,color .15s}.TextbooksBrowser_levelTabActive__30ole{background:var(--color-primary,#667eea);border-color:var(--color-primary,#667eea);color:#fff}.TextbooksBrowser_versionFilter__F21rq{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px;margin-bottom:28px}.TextbooksBrowser_versionLabel__TpUEG{font-size:.85rem;color:var(--color-text-tertiary,#9ca3af)}.TextbooksBrowser_versionChips__QdqvQ{display:flex;flex-wrap:wrap;gap:6px}.TextbooksBrowser_chipActive__K_bMH,.TextbooksBrowser_chip__S9RtX{padding:4px 14px;border-radius:999px;border:1px solid var(--color-border,#e5e7eb);background:var(--color-surface,#fff);color:var(--color-text-secondary,#6b7280);font-size:.85rem;cursor:pointer;transition:background .15s,color .15s}.TextbooksBrowser_chipActive__K_bMH{background:var(--color-primary-50,#eef2ff);border-color:var(--color-primary,#667eea);color:var(--color-primary,#667eea);font-weight:600}.TextbooksBrowser_group__RfwhC{margin-bottom:36px}.TextbooksBrowser_groupTitle__BOBL1{display:flex;align-items:baseline;gap:10px;font-size:1.25rem;font-weight:700;color:var(--color-text-primary,#1f2937);margin-bottom:14px}.TextbooksBrowser_groupSemester__kJ88x{font-size:1rem;font-weight:600;color:var(--color-text-secondary,#6b7280)}.TextbooksBrowser_groupCount__QPVlF{font-size:.85rem;font-weight:400;color:var(--color-text-tertiary,#9ca3af)}.TextbooksBrowser_grid__TumFY{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}.TextbooksBrowser_empty__LzLVZ{text-align:center;color:var(--color-text-tertiary,#9ca3af);padding:48px 0}.page_page__2zYJe{max-width:1200px;margin:0 auto;padding:32px 20px 64px}.page_hero__13LWy{text-align:center;padding:24px 0 8px}.page_hero__13LWy h1{font-size:2rem;font-weight:700;color:var(--color-text-primary,#1f2937);margin-bottom:8px}.page_hero__13LWy p{color:var(--color-text-secondary,#6b7280);font-size:1.05rem}.page_about__2ULLo{background:var(--color-primary-50,#eef2ff);border:1px solid var(--color-primary-100,#e0e7ff);border-radius:12px;padding:20px 24px;margin:24px auto 8px;max-width:860px}.page_about__2ULLo h2{font-size:1.05rem;font-weight:700;color:var(--color-primary,#667eea);margin-bottom:10px}.page_about__2ULLo ul{margin:0;padding-left:1.2em;display:flex;flex-direction:column;gap:6px}.page_about__2ULLo li{color:var(--color-text-secondary,#4b5563);line-height:1.65;font-size:.95rem}.page_loadError__IfkC0{text-align:center;color:var(--color-error,#dc2626);background:var(--color-error-50,#fef2f2);border:1px solid var(--color-error-100,#fee2e2);border-radius:10px;padding:24px;margin:32px auto;max-width:640px}