:root{--color-bg: #f6f5f2;--color-surface: #ffffff;--color-surface-alt: #f1f0ec;--color-border: #e4e1da;--color-text: #22223b;--color-text-muted: #6b6b83;--color-text-faint: #75758c;--color-primary: #4f5bd5;--color-primary-hover: #3f4ab8;--color-primary-soft: #eef0fd;--color-success: #1a9c72;--color-success-soft: #e4f7ef;--color-danger: #e0483e;--color-danger-soft: #fbeae8;--color-tag: #4f5bd5;--color-tag-soft: #eef0fd;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--radius-pill: 999px;--shadow-sm: 0 1px 2px rgba(34, 34, 59, .06);--shadow-md: 0 4px 16px rgba(34, 34, 59, .08);--shadow-lg: 0 12px 32px rgba(34, 34, 59, .16);--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.5rem;--space-6: 2rem;--font-sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Segoe UI", sans-serif;--nav-height: 60px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);-webkit-font-smoothing:antialiased}#root{min-height:100vh}button,input,textarea{font-family:inherit}a{color:inherit}.page{max-width:520px;margin:0 auto;padding:var(--space-4) var(--space-4) calc(var(--nav-height) + var(--space-6));animation:fade-in .25s ease}@media (min-width: 640px){.page{padding-bottom:var(--space-6)}}.page-title{font-size:1.15rem;font-weight:700;margin:0 0 var(--space-4)}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;cursor:pointer;font-size:.9rem;font-weight:600;border-radius:var(--radius-pill);padding:.55rem 1.1rem;transition:transform .12s ease,box-shadow .12s ease,background-color .12s ease,opacity .12s ease}.btn:active{transform:scale(.96)}.btn:disabled{opacity:.55;cursor:default;transform:none}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover)}.btn-secondary{background:var(--color-surface-alt);color:var(--color-text)}.btn-secondary:hover:not(:disabled){background:var(--color-border)}.btn-ghost{background:transparent;color:var(--color-text-muted);padding:.4rem .6rem}.btn-ghost:hover:not(:disabled){background:var(--color-surface-alt)}.btn-danger{background:var(--color-danger);color:#fff}.btn-danger-outline{background:var(--color-danger-soft);color:var(--color-danger)}.btn-sm{padding:.3rem .75rem;font-size:.78rem}.btn-block{width:100%}.input,.textarea{width:100%;border:1.5px solid var(--color-border);border-radius:var(--radius-sm);padding:.6rem .8rem;font-size:.95rem;background:var(--color-surface);color:var(--color-text);transition:border-color .15s ease,box-shadow .15s ease}.input:focus,.textarea:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-soft)}.textarea{resize:vertical}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm)}.book-card{transition:transform .12s ease,box-shadow .12s ease}.book-card:active{transform:scale(.985)}.chip{display:inline-flex;align-items:center;gap:.25rem;padding:.2rem .65rem;border-radius:var(--radius-pill);font-size:.78rem;font-weight:600;border:none;cursor:pointer;background:var(--color-tag-soft);color:var(--color-tag);transition:transform .12s ease,background-color .12s ease}.chip:active{transform:scale(.94)}.chip.is-active{background:var(--color-tag);color:#fff}.badge{display:inline-flex;align-items:center;padding:.25rem .8rem;border-radius:var(--radius-pill);font-size:.8rem;font-weight:700;border:none;cursor:pointer}.badge-unread{background:var(--color-surface-alt);color:var(--color-text-muted)}.badge-read{background:var(--color-success-soft);color:var(--color-success)}.toast{position:fixed;top:var(--space-4);left:50%;transform:translate(-50%);background:var(--color-text);color:#fff;padding:.7rem 1.4rem;border-radius:var(--radius-lg);z-index:1000;font-size:.88rem;max-width:min(90vw,420px);white-space:normal;overflow-wrap:break-word;text-align:center;box-shadow:var(--shadow-lg);animation:toast-in .2s ease}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,-8px)}to{opacity:1;transform:translate(-50%)}}@keyframes fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.skeleton{background:linear-gradient(90deg,var(--color-surface-alt) 25%,var(--color-border) 37%,var(--color-surface-alt) 63%);background-size:400% 100%;animation:skeleton-shimmer 1.4s ease infinite;border-radius:var(--radius-sm)}@keyframes skeleton-shimmer{0%{background-position:100% 50%}to{background-position:0 50%}}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#14141e73;z-index:1100;display:flex;align-items:flex-end;justify-content:center;animation:backdrop-in .2s ease}@keyframes backdrop-in{0%{opacity:0}to{opacity:1}}.sheet{background:var(--color-surface);width:100%;max-width:520px;max-height:88vh;overflow-y:auto;border-radius:var(--radius-lg) var(--radius-lg) 0 0;padding:var(--space-5) var(--space-4) var(--space-6);box-shadow:var(--shadow-lg);animation:sheet-in .22s cubic-bezier(.32,.72,0,1)}@media (min-width: 640px){.sheet-backdrop{align-items:center}.sheet{border-radius:var(--radius-lg);max-height:80vh}}@keyframes sheet-in{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.sheet-handle{width:36px;height:4px;background:var(--color-border);border-radius:var(--radius-pill);margin:0 auto var(--space-4)}.nav-top{display:none}.nav-bottom{position:fixed;bottom:0;left:0;right:0;height:var(--nav-height);background:var(--color-surface);border-top:1px solid var(--color-border);display:flex;z-index:900;padding-bottom:env(safe-area-inset-bottom)}.nav-bottom a,.nav-bottom button{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.15rem;font-size:.7rem;color:var(--color-text-faint);text-decoration:none;border:none;background:none;cursor:pointer;font-weight:600}.nav-bottom .icon{font-size:1.25rem}.nav-bottom .is-active{color:var(--color-primary)}@media (min-width: 640px){.nav-bottom{display:none}.nav-top{display:flex;align-items:center;gap:var(--space-5);padding:var(--space-3) var(--space-5);border-bottom:1px solid var(--color-border);background:var(--color-surface)}.nav-top a{text-decoration:none;color:var(--color-text-muted);font-weight:600;font-size:.92rem;display:flex;align-items:center;gap:.35rem}.nav-top a.is-active{color:var(--color-primary)}.nav-top .spacer{flex:1}}.progress-track{background:var(--color-surface-alt);border-radius:var(--radius-pill);height:6px;overflow:hidden}.progress-fill{background:var(--color-success);height:100%;border-radius:var(--radius-pill);transition:width .4s ease}.empty-state{text-align:center;color:var(--color-text-faint);margin-top:var(--space-6);font-size:.92rem;line-height:1.7}