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srgb,var(--color-bg)92%,transparent)}}.reader-header{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.reader-preview-banner{text-align:center;background:var(--color-warning-subtle,#fff4cc);color:var(--color-text);padding:.65rem 1rem;font-weight:700}.reader-layout{grid-template-columns:minmax(0,42rem) minmax(17rem,22rem);justify-content:center;align-items:start;gap:clamp(2rem,6vw,5rem);padding:clamp(2rem,6vw,5rem) clamp(1rem,4vw,2.5rem);display:grid}.reading-article{font-family:Georgia,Times New Roman,serif;font-size:clamp(1.1rem,1rem + .35vw,1.3rem);line-height:1.85}.reading-article h1{font-family:var(--font-sans,system-ui);letter-spacing:-.035em;margin:.5rem 0 1rem;font-size:clamp(2rem,6vw,3.6rem);line-height:1.08}.reading-article h2{font-family:var(--font-sans,system-ui);margin:2.5rem 0 1rem;font-size:1.5rem}.reading-article>p,.reading-dialogue,.reading-callout{margin-top:1.4rem}.reading-summary{font-family:var(--font-sans,system-ui);color:var(--color-text-muted);margin-bottom:2.5rem;font-size:1.05rem;line-height:1.55}.reading-word{cursor:pointer;text-underline-offset:.18em;border-radius:.25rem;text-decoration-thickness:.08em}.reading-word:hover{background:var(--color-accent-subtle);text-decoration:underline}.reading-word:active{background:var(--color-accent);color:var(--color-on-accent)}.reading-dialogue,.reading-callout{border-left:4px solid var(--color-accent);background:var(--color-surface);padding:1rem 1.25rem}.reading-dialogue p+p{margin-top:.8rem}.reading-callout strong{font-family:var(--font-sans,system-ui)}.reader-tools{border:1px solid var(--color-border);background:var(--color-surface);border-radius:1rem;padding:1rem;position:sticky;top:5.5rem}.reading-lookup{margin-top:1.25rem}.reading-quiz{font-family:var(--font-sans,system-ui);border-top:1px solid var(--color-border);margin-top:3rem;padding-top:2rem}.reading-option{border:1px solid var(--color-border);background:var(--color-surface);cursor:pointer;border-radius:.75rem;align-items:flex-start;gap:.75rem;padding:.85rem;display:flex}.reading-option:has(input:checked){border-color:var(--color-accent);box-shadow:0 0 0 1px var(--color-accent)}@media(max-width:800px){.reader-layout{grid-template-columns:1fr;padding-top:2rem}.reader-tools{grid-row:1;position:static}.reading-article h1{font-size:2.25rem}.reader-header .chip:nth-child(2){display:none}}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}a{color:inherit}.skip-link{z-index:100;background:var(--brand-primary);color:#fff;border-radius:12px;padding:10px 16px;transition:transform .16s;position:fixed;top:12px;left:16px;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}.app-main{min-height:calc(100vh - 72px);padding-bottom:calc(92px + env(safe-area-inset-bottom))}.page-container{width:100%;max-width:1152px;margin-inline:auto;padding:24px 16px 40px}.page-container--narrow{max-width:768px}.page-container--focused{max-width:672px}.surface{background:var(--surface);border:1px solid var(--border)}.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:20px}.feature-card{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:24px;padding:clamp(20px,4vw,32px)}.muted{color:var(--text-secondary)}.eyebrow{color:var(--accent-strong);letter-spacing:.08em;text-transform:uppercase;font-size:.75rem;font-weight:750}.section-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:16px;display:grid}.btn{cursor:pointer;border:1px solid #0000;border-radius:12px;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:10px 18px;font-weight:700;transition:transform .15s,background-color .15s,border-color .15s;display:inline-flex}.btn:hover{transform:translateY(-1px)}.btn:disabled{cursor:not-allowed;opacity:.5;transform:none}.btn-learning{background:var(--learning-action);color:#fff;min-height:48px}.btn-learning:hover{background:var(--learning-hover)}.btn-learning:active{background:var(--learning-pressed);transform:none}.field{border:1px solid var(--border);border-radius:var(--radius-control);background:var(--page);width:100%;min-height:48px;color:var(--text-primary);padding:10px 14px}.home-next{background:var(--accent-soft);border-color:var(--brand-primary);box-shadow:none}.card,.feature-card{overflow-wrap:anywhere}.btn-product{background:var(--brand-primary);color:#fff;min-height:48px}.btn-secondary{background:var(--surface);color:var(--text-primary);border-color:var(--border)}.btn-tertiary{color:var(--accent-strong);background:0 0}.btn-destructive{background:var(--error);color:#fff}.btn-hint{background:var(--hint);color:#151922}.input{border:1px solid var(--border);background:var(--surface);width:100%;min-height:48px;color:var(--text-primary);border-radius:12px;padding:10px 14px}.chip{background:var(--surface);border:1px solid var(--border);border-radius:999px;align-items:center;gap:6px;min-height:36px;padding:6px 12px;font-size:.875rem;font-weight:650;display:inline-flex}.selected{border-color:var(--brand-primary)!important;background:var(--accent-soft)!important}.desktop-only{display:none}.mobile-only{display:block}.bottom-nav{z-index:40;min-height:calc(72px + env(safe-area-inset-bottom));padding:0 max(4px,env(safe-area-inset-right))env(safe-area-inset-bottom)max(4px,env(safe-area-inset-left));background:var(--surface-raised);grid-template-columns:repeat(6,minmax(0,1fr));display:grid;position:fixed;bottom:0;left:0;right:0}@supports (color:color-mix(in lab,red,red)){.bottom-nav{background:color-mix(in srgb,var(--surface-raised)92%,transparent)}}.bottom-nav{border-top:1px solid var(--border);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:0 -8px 24px #121f3414}.bottom-nav__item{min-width:0;min-height:72px;color:var(--text-secondary);white-space:nowrap;flex-direction:column;justify-content:center;align-items:center;gap:3px;font-size:clamp(.56rem,2.8vw,.72rem);font-weight:650;line-height:1.1;text-decoration:none;display:flex;position:relative}.bottom-nav__item[aria-current=page]{color:var(--accent-strong)}.bottom-nav__item[aria-current=page]:before{content:"";background:var(--brand-primary);border-radius:0 0 4px 4px;width:28px;height:3px;position:absolute;top:0}.desktop-header{border-bottom:1px solid var(--border);background:var(--page);min-height:72px}@supports (color:color-mix(in lab,red,red)){.desktop-header{background:color-mix(in srgb,var(--page)92%,transparent)}}.desktop-header{-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);z-index:30;position:sticky;top:0}.desktop-nav{flex-wrap:wrap;align-items:center;gap:4px 20px;max-width:1152px;min-height:72px;margin:auto;padding:8px 24px;display:flex}.desktop-nav__link{min-height:44px;color:var(--text-secondary);border-bottom:3px solid #0000;align-items:center;font-weight:650;text-decoration:none;display:inline-flex}.desktop-nav__link[aria-current=page]{color:var(--accent-strong);border-color:var(--brand-primary)}.brand{color:var(--text-primary);white-space:nowrap;align-items:center;gap:10px;margin-right:auto;font-weight:850;text-decoration:none;display:inline-flex}.brand-mark{background:var(--brand-primary);color:#fff;border-radius:12px;place-items:center;width:34px;height:34px;display:grid}.footer{border-top:1px solid var(--border);color:var(--text-secondary);padding:28px 32px}.footer__inner{flex-wrap:wrap;justify-content:space-between;gap:24px;max-width:1152px;margin:auto;display:flex}.footer a{color:var(--text-secondary)}.progress-track{background:var(--border);border-radius:999px;height:10px;overflow:hidden}.progress-bar{border-radius:inherit;background:var(--brand-primary);height:100%}.dialog-backdrop{z-index:80;background:#04091294;place-items:center;padding:16px;display:grid;position:fixed;top:0;right:0;bottom:0;left:0}.dialog{border:1px solid var(--border);background:var(--surface-raised);width:min(100%,520px);box-shadow:var(--shadow);border-radius:24px;padding:24px}.language-shell{min-height:100vh;padding:max(24px,env(safe-area-inset-top))max(16px,env(safe-area-inset-right))max(24px,env(safe-area-inset-bottom))max(16px,env(safe-area-inset-left));background:radial-gradient(circle at 50% 0%,var(--accent-soft),transparent 52%);place-items:center;display:grid}.language-option{border:1px solid var(--border);width:100%;min-height:64px;color:var(--text-primary);background:var(--surface);cursor:pointer;border-radius:16px;justify-content:space-between;align-items:center;padding:12px 16px;font-size:1.1rem;font-weight:650;display:flex}.segmented{background:var(--surface);border:1px solid var(--border);border-radius:16px;grid-template-columns:repeat(3,1fr);gap:4px;padding:4px;display:grid}.segmented button{min-height:44px;color:var(--text-secondary);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:12px;font-weight:700}.segmented button[aria-pressed=true]{color:var(--accent-strong);background:var(--accent-soft);border-color:var(--brand-primary)}.vocabulary-controls{border:1px solid var(--border);background:var(--surface);border-radius:20px;gap:18px;padding:18px;display:grid}.library-search{border:1px solid var(--border);background:var(--page);border-radius:12px;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;min-height:48px;padding:0 6px 0 14px;display:grid}.library-search:focus-within{border-color:var(--brand-primary);box-shadow:0 0 0 2px var(--accent-soft)}.library-search input{min-width:0;min-height:46px;color:var(--text-primary);background:0 0;border:0;outline:0}.library-search input::-webkit-search-cancel-button{display:none}.library-filter{gap:8px;display:grid}.library-filter__label{color:var(--text-secondary);font-size:.8rem;font-weight:750}.library-filter__options{flex-wrap:wrap;gap:8px;display:flex}.library-filter__options .chip{cursor:pointer;min-height:44px}.vocabulary-grid{grid-template-columns:minmax(0,1fr);gap:14px;display:grid}.vocabulary-card{border:1px solid var(--border);background:var(--surface);border-radius:16px;min-width:0;padding:18px;text-decoration:none;transition:transform .15s,border-color .15s,box-shadow .15s;display:block}.vocabulary-card:hover{border-color:var(--brand-primary);box-shadow:var(--shadow);transform:translateY(-1px)}.reference-section{border-top:1px solid var(--border);margin-top:30px;padding-top:26px}.form-chip{border:1px solid var(--border);background:var(--surface);border-radius:14px;gap:1px;min-width:92px;padding:10px 14px;display:grid}.sense-card{border:1px solid var(--border);background:var(--surface);border-radius:18px;padding:18px;scroll-margin-top:90px;list-style:none}.sense-number{background:var(--accent-soft);width:28px;height:28px;color:var(--accent-strong);border-radius:999px;flex:0 0 28px;place-items:center;font-size:.8rem;font-weight:800;display:grid}.related-link{border:1px solid var(--border);max-width:100%;min-height:44px;color:var(--accent-strong);background:var(--surface);border-radius:12px;grid-template-columns:auto auto auto;align-items:center;gap:8px;padding:8px 12px;font-weight:700;text-decoration:none;display:inline-grid}.related-link span{color:var(--text-secondary);font-size:.75rem;font-weight:600}.related-link:hover{border-color:var(--brand-primary);background:var(--accent-soft)}.selection-bar{z-index:45;left:12px;right:12px;bottom:calc(82px + env(safe-area-inset-bottom));border:1px solid var(--brand-primary);background:var(--surface-raised);box-shadow:var(--shadow);border-radius:16px;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px;display:flex;position:fixed}.quiz-shell{width:min(100% - 32px,720px);padding:24px 0 calc(100px + env(safe-area-inset-bottom));margin:0 auto}.quiz-top{justify-content:space-between;align-items:center;gap:16px;margin-bottom:14px;font-weight:700;display:flex}.quiz-card{border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow);border-radius:24px;margin-top:24px;padding:clamp(20px,5vw,36px)}.answer-option{text-align:left;border:2px solid var(--border);width:100%;min-height:52px;color:var(--text-primary);background:var(--surface);cursor:pointer;border-radius:14px;padding:12px 16px}.answer-option:hover{border-color:var(--brand-primary)}.answer-option.answer-correct{border-color:var(--success)!important;background:var(--success-soft)!important}.answer-option.answer-wrong{border-color:var(--error)!important;background:var(--error-soft)!important}@media(min-width:640px){.page-container{padding-inline:24px}.vocabulary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(min-width:768px){.desktop-only{display:block}.mobile-only{display:none}.app-main{min-height:calc(100vh - 145px);padding-bottom:0}.page-container{padding:64px 16px}.selection-bar{width:min(640px,100% - 48px);bottom:24px;left:50%;right:auto;transform:translate(-50%)}}@media(prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@keyframes spin{to{transform:rotate(360deg)}}