@layer tokens,reset,base,layout,controls,components,utilities;@layer tokens{:root{color-scheme:light dark;--color-bg: light-dark(#f7f7fb, #0e0f1c);--color-surface: light-dark(#ffffff, #181a2c);--color-surface-alt: light-dark(#f0f1f7, #21243a);--color-text: light-dark(#15162b, #ecedf6);--color-text-muted: light-dark(#5b5d75, #a0a3bd);--color-border: light-dark(#e2e3ef, #2a2d44);--color-primary: light-dark(#4338ca, #818cf8);--color-primary-hover: light-dark(#3730a3, #a5b4fc);--color-primary-contrast: light-dark(#ffffff, #0e0f1c);--color-primary-ring: light-dark(rgb(67 56 202 / 20%), rgb(129 140 248 / 32%));--color-success: #16a34a;--color-danger: #dc2626;--color-danger-bg: light-dark(#fef2f2, #2a1414);--color-focus: #6366f1;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--shadow-sm: 0 1px 2px rgb(15 16 50 / 6%);--shadow-md: 0 6px 24px rgb(15 16 50 / 10%);--shadow-lg: 0 24px 48px rgb(15 16 50 / 18%);--color-backdrop: rgb(15 16 50 / 55%);--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.5rem;--space-6: 2rem;--space-8: 3rem;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, "Helvetica Neue", Arial, sans-serif;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.75rem}:root[data-theme=dark]{color-scheme:dark}:root[data-theme=light]{color-scheme:light}}@layer reset{*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0}img{max-width:100%;display:block}}@layer base{body{font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility}body.modal-open{overflow:hidden}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;inset-block-start:-40px;inset-inline-start:1rem;background:var(--color-primary);color:var(--color-primary-contrast);padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);text-decoration:none;z-index:1000}.skip-link:focus{inset-block-start:1rem}:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px;border-radius:var(--radius-sm)}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}@media(forced-colors:active){.btn,.input,.book-card,.toolbar,.modal__dialog,.toast{border:1px solid CanvasText}:focus-visible{outline-color:Highlight}}}@layer layout{.app-header{background:var(--color-surface);border-block-end:1px solid var(--color-border);box-shadow:var(--shadow-sm);position:sticky;inset-block-start:0;z-index:10}.app-header__inner{max-width:1200px;margin:0 auto;padding:var(--space-4) var(--space-5);display:flex;align-items:center;justify-content:space-between;gap:var(--space-4)}.app-header__title{margin:0;font-size:clamp(var(--font-size-2xl),1.125rem + 1vw,1.875rem);font-weight:700;letter-spacing:-.02em}.app-header__actions{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap;justify-content:flex-end}.app-main{max-width:1200px;margin:0 auto;padding:var(--space-6) var(--space-5);container-type:inline-size;container-name:main}.toolbar{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-4);margin-block-end:var(--space-6);display:grid;grid-template-columns:minmax(260px,1fr) auto;gap:var(--space-3) var(--space-4);align-items:center;box-shadow:var(--shadow-sm)}.toolbar__group{display:flex;gap:var(--space-3);flex-wrap:wrap;align-items:end}.toolbar__group--search .input{width:100%}.toolbar__field{display:flex;flex-direction:column;gap:var(--space-1)}.toolbar__label{font-size:var(--font-size-sm);font-weight:600;color:var(--color-text-muted)}.toolbar__clear{align-self:end}@container main (max-width: 900px){.toolbar{grid-template-columns:1fr}}@container main (max-width: 640px){.toolbar{padding:var(--space-3)}}@media(max-width:640px){.app-header__inner,.app-main{padding-inline:var(--space-4)}}}@layer controls{.input{font:inherit;padding:var(--space-3) var(--space-4);background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border);border-radius:var(--radius-md);min-width:0;transition:border-color .15s,box-shadow .15s}.input:focus-visible{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-ring)}.input[aria-invalid=true]{border-color:var(--color-danger)}.input[aria-invalid=true]:focus-visible{border-color:var(--color-danger);box-shadow:0 0 0 3px color-mix(in oklch,var(--color-danger) 24%,transparent)}.btn{font:inherit;font-weight:600;padding:var(--space-3) var(--space-5);border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;background:var(--color-surface);color:var(--color-text);transition:background .15s,color .15s,transform .05s}.btn:active{transform:translateY(1px)}.btn--primary{background:var(--color-primary);color:var(--color-primary-contrast)}.btn--primary:hover{background:var(--color-primary-hover)}.btn--ghost{background:var(--color-surface-alt);color:var(--color-text)}.btn--ghost:hover{background:var(--color-border)}.btn--danger-ghost{background:var(--color-danger-bg);color:var(--color-danger)}.btn--danger-ghost:hover{background:var(--color-danger);color:#fff}}@layer utilities;@layer components{.toast-stack{position:fixed;inset-block-end:var(--space-5);inset-inline-end:var(--space-5);display:flex;flex-direction:column;gap:var(--space-2);z-index:200;pointer-events:none}.toast{background:var(--color-surface);color:var(--color-text);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);border:1px solid var(--color-border);box-shadow:var(--shadow-md);pointer-events:auto;max-width:360px;font-size:var(--font-size-sm);animation:toast-slide-in .18s ease-out}.toast:before{margin-inline-end:var(--space-2);font-weight:700}.toast--success{border-inline-start:4px solid var(--color-success)}.toast--success:before{content:"✓";color:var(--color-success)}.toast--error{border-inline-start:4px solid var(--color-danger)}.toast--error:before{content:"⚠";color:var(--color-danger)}.toast--info{border-inline-start:4px solid var(--color-primary)}.toast--info:before{content:"ⓘ";color:var(--color-primary)}.toast--leaving{opacity:0;transform:translateY(8px);transition:opacity .2s,transform .2s}@media(prefers-reduced-motion:reduce){.toast--leaving{transform:none}}}@keyframes toast-slide-in{0%{transform:translateY(8px);opacity:0}to{transform:translateY(0);opacity:1}}@layer components{.book-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow-sm);transition:transform .15s,box-shadow .15s}.book-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.book-card--read{border-color:color-mix(in oklch,var(--color-success) 35%,transparent)}.book-card__cover{width:100%;aspect-ratio:2 / 3;object-fit:cover;background:var(--color-surface-alt)}.book-card__cover--placeholder{display:flex;align-items:center;justify-content:center;font-size:3rem;color:var(--color-text-muted)}.book-card__body{padding:var(--space-5);display:flex;flex-direction:column;gap:var(--space-3);flex:1}.book-card__title{margin:0;font-size:var(--font-size-lg);line-height:1.3;overflow-wrap:anywhere;text-wrap:balance}.book-card__authors{margin:0;color:var(--color-text-muted);font-size:var(--font-size-sm);overflow-wrap:anywhere}.book-card__meta{margin:0;display:grid;grid-template-columns:auto 1fr;gap:var(--space-1) var(--space-3);font-size:var(--font-size-sm)}.book-card__meta dt{color:var(--color-text-muted);font-weight:600}.book-card__meta dd{margin:0}.book-card__actions{margin-top:auto;display:flex;flex-wrap:wrap;gap:var(--space-2)}.book-card__actions .btn{padding:var(--space-2) var(--space-3);font-size:var(--font-size-sm)}.book-card__status--read{color:var(--color-success)}}@layer components{.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--space-5)}.empty-state{text-align:center;padding:var(--space-8) var(--space-5);background:var(--color-surface);border:1px dashed var(--color-border);border-radius:var(--radius-lg);color:var(--color-text-muted)}.empty-state__icon{font-size:3rem;margin:0 0 var(--space-3)}.empty-state__message{margin:0;font-size:var(--font-size-base)}.empty-state__action{margin-top:var(--space-4)}.book-list__status{text-align:center;padding:var(--space-3) 0;color:var(--color-text-muted);font-size:var(--font-size-sm)}.book-list__load-more{display:block;margin:var(--space-4) auto 0}.book-list__load-more[hidden]{display:none}@container main (max-width: 640px){.book-grid{grid-template-columns:1fr}}}@layer components{.theme-toggle{width:2.5rem;height:2.5rem;padding:0;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--color-border)}.theme-toggle:hover{background:var(--color-border)}.theme-toggle__icon{width:1.125rem;height:1.125rem}}