@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=Poppins:wght@400;600;700&display=swap";:root{--font-display: "Poppins", sans-serif;--font-body: "Inter", sans-serif;--font-heading: "Poppins", sans-serif;--bg-color: #f7f8fc;--bg-secondary: #ffffff;--text-color: #2b2d42;--text-secondary: #8d99ae;--card-bg: #ffffff;--border-color: #e2e8f0;--progress-bg: #e2e8f0;--level-bg: #e6e8ff;--level-text: #5a67d8;--word-hover-bg: #ede9fe;--word-highlight-bg: #dcd7ff;--word-highlight-text: #362f78;--spinner-bg: #e2e8f0;--spinner-color: #6c63ff;--success-bg: #c6f6d5;--success-text: #22543d;--error-bg: #fed7d7;--error-border: #fc8181;--error-text: #c53030;line-height:1.5;letter-spacing:.6px;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme: dark){:root{--bg-color: #1e1f2a;--bg-secondary: #2b2d42;--text-color: #f7fafc;--text-secondary: #cbd5e0;--card-bg: #2b2d42;--border-color: #4a5568;--progress-bg: #4a5568;--level-bg: #3d3fde;--level-text: #c3bafd;--word-hover-bg: #4c4ed6;--word-highlight-bg: #6c63ff;--word-highlight-text: #e6e8ff;--spinner-bg: #4a5568;--spinner-color: #6c63ff;--success-bg: #2f855a;--success-text: #c6f6d5;--error-bg: #742a2a;--error-border: #e53e3e;--error-text: #fed7d7}}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background-color:var(--bg-color);color:var(--text-color);font-family:var(--font-body);font-display:swap;transition:background-color .3s ease,color .3s ease;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}#root{width:100%;height:100%}input,textarea,[contenteditable]{-webkit-user-select:text;user-select:text}input,select,textarea{font-size:16px}*{scroll-behavior:smooth}@supports (padding: max(0px)){body{padding-top:max(env(safe-area-inset-top),0px);padding-bottom:max(env(safe-area-inset-bottom),0px);padding-left:max(env(safe-area-inset-left),0px);padding-right:max(env(safe-area-inset-right),0px)}}::-webkit-scrollbar{display:none}button,[role=button],a{-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;touch-action:manipulation}button,.nav,.header,.toolbar{-webkit-user-select:none;user-select:none}:root{--primary-color: #2b2d42;--secondary-color: #8d99ae;--accent-color: #6c63ff;--background-color: #f7f8fc;--text-color: #2b2d42;--light-gray: #e2e8f0;--serif: "Poppins", sans-serif;--sans-serif: "Inter", sans-serif}body{background-color:var(--background-color);color:var(--text-color);line-height:1.6;margin:0;padding:0}.vocab-app{max-width:1200px;margin:0 auto;padding:2rem;background:#fff;box-shadow:0 0 20px #0000001a;min-height:100vh;font-family:var(--sans-serif)}.article-display{max-width:1000px;width:100%;margin:0 auto;padding:2rem 0;column-count:2;column-gap:3rem;column-rule:1px solid var(--light-gray)}@media (max-width: 768px){.article-display{column-count:1;padding:1rem}}.article-title{font-family:var(--serif);font-size:2.8rem;font-weight:700;color:var(--primary-color);margin:0 0 2rem;line-height:1.2;text-align:left;padding-bottom:1rem;column-span:all;break-inside:avoid;page-break-inside:avoid}.current-article{font-family:var(--serif);font-size:1.15rem;color:var(--text-color);line-height:1.8;text-align:justify;margin-bottom:2rem;-webkit-hyphens:auto;hyphens:auto;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.current-article p:first-of-type:first-letter{float:left;font-family:var(--serif);font-size:5rem;line-height:.8;padding:.1em .2em 0 0;color:var(--accent-color);font-weight:700}.current-article p{margin-bottom:1.5rem;text-indent:1.5em;text-align:justify;line-height:1.8;font-size:1.1rem;font-family:var(--serif);-webkit-hyphens:auto;hyphens:auto}.article-footer{margin-top:30px;padding-top:20px;text-align:center}.loading-spinner{display:flex;flex-direction:column;align-items:center;gap:16px;padding:40px}.loading-spinner p{color:var(--text-secondary);font-size:1rem;margin:0;font-family:Times New Roman,Times,serif}.error-message{background:var(--error-bg);border:none;padding:20px;margin:20px 0}.error-message p{color:var(--error-text);font-size:1rem;margin:0;text-align:center;font-family:Times New Roman,Times,serif}.welcome-message{text-align:center;padding:4rem 2rem;max-width:800px;margin:0 auto;background:#fff;box-shadow:0 0 30px #00000014;position:relative;overflow:hidden}.welcome-message:before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--accent-color),#d4af37,var(--accent-color))}.welcome-message h2{font-family:var(--serif);font-size:3.5rem;color:var(--primary-color);margin:0 0 1.5rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;position:relative;padding-bottom:1.5rem}.welcome-message h2:after{content:"";position:absolute;bottom:0;left:50%;transform:translate(-50%);width:100px;height:3px;background-color:var(--accent-color)}.welcome-message h3{font-family:var(--serif);font-size:1.8rem;color:var(--secondary-color);margin:2rem 0 1.5rem;font-weight:400;font-style:italic;line-height:1.4}.welcome-message p{font-family:var(--sans-serif);font-size:1.15rem;color:var(--secondary-color);line-height:1.8;margin:0 auto 2rem;max-width:700px}button{background-color:var(--primary-color);color:#fff;border:none;padding:.8rem 2rem;font-size:1rem;font-family:var(--sans-serif);text-transform:uppercase;letter-spacing:1px;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden}button:hover{background-color:var(--accent-color);transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}button:active{transform:translateY(0)}button:disabled{background-color:#ccc;cursor:not-allowed;transform:none;box-shadow:none}.next-button{margin:3rem auto 1rem;display:inline-flex;align-items:center;justify-content:center;background:transparent;color:var(--accent-color);padding:.8rem 2.5rem;text-decoration:none;font-weight:500;letter-spacing:2px;text-transform:uppercase;font-size:.85rem;border:2px solid var(--accent-color);position:relative;overflow:hidden;transition:all .4s cubic-bezier(.25,.8,.25,1);font-family:var(--sans-serif);cursor:pointer;outline:none}.next-button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:var(--accent-color);transition:all .4s cubic-bezier(.25,.8,.25,1);z-index:-1}.next-button:hover{color:#fff;transform:translateY(-2px);box-shadow:0 4px 20px #8b000026}.next-button:hover:before{left:0}.next-button:active{transform:translateY(0);box-shadow:0 2px 8px #8b000026}.next-button:disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:none}.next-button:disabled:before{display:none}.next-button:after{content:"→";display:inline-block;margin-left:.5rem;transition:transform .3s ease}.next-button:hover:after{transform:translate(4px)}.start-button{background-color:var(--accent-color);font-size:1.1rem;padding:1rem 3rem;margin-top:1rem;border-radius:0;font-weight:600;border:none;color:#fff;text-transform:uppercase;letter-spacing:1px;transition:all .3s ease}.start-button:hover{background-color:#6a0000;transform:translateY(-2px);box-shadow:0 4px 12px #00000026}@media (max-width: 768px){.vocab-app{padding:1rem}.article-title{font-size:2.2rem;margin:1.5rem 0}.welcome-message h2{font-size:2.5rem}.welcome-message h3{font-size:1.5rem}.current-article p:first-of-type:first-letter{font-size:4rem}}.article-display:before{content:"";display:block;height:1px;background:linear-gradient(to right,transparent,var(--light-gray),transparent);margin:3rem 0;width:100%}.article-display:after{content:"❧";display:block;text-align:center;color:var(--accent-color);font-size:2rem;margin:3rem 0;width:100%}.change-level-button{background:var(--card-bg);color:var(--text-secondary);border:none;padding:10px 20px;font-size:.9rem;cursor:pointer;transition:all .2s ease;font-family:Times New Roman,Times,serif;margin-bottom:20px;border-radius:4px}.change-level-button:hover{background:var(--word-hover-bg)}.next-button-container{text-align:center;margin-top:1rem}.next-button{background:var(--card-bg);color:var(--text-color);border:none;padding:8px 16px;font-size:.9rem;font-weight:400;cursor:pointer;transition:all .2s ease;font-family:Times New Roman,Times,serif}.next-button:hover:not(:disabled){background:var(--word-hover-bg);color:var(--text-color)}.next-button:disabled{opacity:.5;cursor:not-allowed}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@media (max-width: 768px){.vocab-app{padding:20px 15px}.article-display{padding:40px 30px}.current-article{font-size:1rem;text-align:justify}.article-title{font-size:1.6rem}.welcome-message{padding:30px 15px}.welcome-message h2{font-size:1.8rem}.welcome-message h3{font-size:1.4rem}.level-select{padding:8px 16px}.level-selection-container{flex-direction:column;align-items:flex-start;gap:8px}.level-select-inline{padding:6px 12px;font-size:.85rem}.instruction-text-inline{font-size:.85rem}}@media (max-width: 480px){.vocab-app{padding:15px 10px}.article-display{padding:30px 20px}.current-article{font-size:.95rem;text-indent:1em}.article-title{font-size:1.4rem;margin-bottom:20px}.next-button{padding:6px 12px;font-size:.85rem}.welcome-message{padding:20px 10px}.welcome-message h2{font-size:1.6rem;margin-bottom:20px}.welcome-message h3{font-size:1.2rem;margin-bottom:15px}.welcome-message p{font-size:1rem;margin-bottom:20px}.level-select{padding:6px 12px;font-size:.85rem}.level-selection-container{flex-direction:column;align-items:flex-start;gap:6px}.level-select-inline{padding:5px 10px;font-size:.8rem;min-width:50px}.instruction-text-inline{font-size:.8rem}}