@layer theme{:root,:host{--font-sans:ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";--font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab,currentcolor 50%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}}:root{--background:#faf8f5;--foreground:#2c2c2c;--accent:#cd3737;--accent-dark:#a52d2d;--correct:#2d7d46;--wrong:#c53030;--card-bg:#fff;--border:#e8e4df;--muted:#6b6b6b}body{background:var(--background);color:var(--foreground);min-height:100vh;font-family:Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,sans-serif}.app-wrapper{justify-content:center;align-items:center;min-height:100vh;padding:1rem;display:flex}.quiz-container{background:var(--card-bg);border-radius:20px;width:100%;max-width:520px;animation:.4s fadeIn;overflow:hidden;box-shadow:0 4px 24px #00000014}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.quiz-header{color:#fff;background:linear-gradient(135deg,#cd3737 0%,#e85a5a 100%);padding:1.5rem 1.75rem}.quiz-header h1{letter-spacing:.02em;margin:0;font-size:1.5rem;font-weight:700}.quiz-meta{opacity:.95;gap:1rem;margin-top:.5rem;font-size:.875rem;display:flex}.quiz-streak{animation:1.5s ease-in-out infinite pulse}@keyframes pulse{50%{opacity:.5}}.quiz-main{padding:1.75rem}.quiz-instruction{color:var(--muted);margin:0 0 1rem;font-size:.9rem}.quiz-sentence{background:var(--background);border:1px solid var(--border);border-radius:12px;margin-bottom:1rem;padding:1rem 1.25rem;font-size:1.15rem;line-height:1.6}.quiz-japanese{color:var(--foreground)}.quiz-korean{color:#1a1a1a;font-size:1.1rem}.quiz-korean .blank{border-bottom:2px dashed var(--muted);min-width:8em;margin:0 .25rem;display:inline-block}.quiz-options{flex-direction:column;gap:.75rem;display:flex}.quiz-option{border:2px solid var(--border);cursor:pointer;text-align:left;background:#fff;border-radius:12px;align-items:center;gap:.75rem;padding:1rem 1.25rem;font-size:1rem;transition:all .2s;display:flex}.quiz-option:hover:not(:disabled){border-color:var(--accent);background:#fff9f9}.quiz-option:disabled{cursor:default}.quiz-option.revealed{pointer-events:none}.quiz-option.correct{border-color:var(--correct);background:#f0fdf4}.quiz-option.wrong{border-color:var(--wrong);background:#fef2f2}.option-number{min-width:1.5rem;font-size:1.1rem}.option-text{flex:1}.quiz-result{border-top:1px solid var(--border);margin-top:1.5rem;padding-top:1.5rem;animation:.3s slideUp}@keyframes slideUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.result-badge{border-radius:9999px;margin-bottom:1rem;padding:.35rem 1rem;font-size:.95rem;font-weight:600;display:inline-block}.result-badge.correct{background:var(--correct);color:#fff}.result-badge.wrong{background:var(--wrong);color:#fff}.result-explanation{color:var(--foreground);font-size:.95rem;line-height:1.6}.result-explanation p{margin:0 0 .75rem}.vocabulary-list{background:var(--background);border-radius:10px;margin-top:1rem;padding:1rem}.vocab-item{margin-bottom:.5rem;font-size:.9rem}.vocab-item:last-child{margin-bottom:0}.vocab-item strong{color:var(--accent);margin-right:.5rem}.result-actions{margin-top:1.5rem}.btn-primary{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:12px;width:100%;padding:1rem 1.5rem;font-size:1rem;font-weight:600;transition:background .2s}.btn-primary:hover{background:var(--accent-dark)}.quiz-footer{padding:0 1.75rem 1rem}.progress-bar{background:var(--border);border-radius:2px;height:4px;overflow:hidden}.progress-fill{background:var(--accent);height:100%;transition:width .3s}