:root{--max-content-width:1200px;--wordle-green:#6AAA64;--wordle-yellow:#C9B458;--wordle-gray:#787C7E;--light-gray:#E3E3E1;--white:#FFFFFF;--black:#000000;--text-primary:#FFFFFF;--text-secondary:#d7dadc;--bg-primary:#1a1a1b;--bg-secondary:#272729;--bg-tertiary:#3a3a3c;--border-color:#3a3a3c;--shadow-light:rgba(0,0,0,0.3);--shadow-medium:rgba(0,0,0,0.5);--shadow-heavy:rgba(0,0,0,0.7);--font-main:font-family:'Poppins',system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif,"Segoe UI",Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";--spacing-xs:0.5rem;--spacing-sm:1rem;--spacing-md:1.5rem;--spacing-lg:2rem;--spacing-xl:3rem;--spacing-2xl:4rem;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--transition-fast:0.15s ease;--transition-normal:0.3s ease;--transition-slow:0.5s ease}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font-main);color:var(--text-primary);background-color:var(--bg-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}::-webkit-scrollbar{width:12px}::-webkit-scrollbar-track{background:#2a2a2a}::-webkit-scrollbar-thumb{background:#6a6a6a;border-radius:6px}::-webkit-scrollbar-thumb:hover{background:#7a7a7a}a{color:var(--wordle-green);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:#538d4e;text-decoration:underline}p a{text-decoration:underline}p a:hover{color:#538d4e;text-decoration:underline}img{max-width:100%;height:auto;display:block}button{font-family:var(--font-main);cursor:pointer;border:none;background:0 0}kbd{background-color:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:2px 6px;font-family:monospace;font-size:.9em}#main-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(39,39,41,.95);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 2px 8px var(--shadow-light);transition:background var(--transition-normal),box-shadow var(--transition-normal)}.navbar{width:100%}.nav-container{max-width:var(--max-content-width);margin:0 auto;padding:.75rem 2rem;display:flex;justify-content:space-between;align-items:center}.nav-left{display:flex;align-items:flex-start;gap:1rem;position:relative}.logo-link{display:flex;align-items:center;gap:.75rem;text-decoration:none;color:var(--text-primary)}.logo-link:hover{text-decoration:none}.logo-img{width:40px;height:40px;border-radius:var(--radius-md)}.site-name{font-size:1.6rem;font-weight:700;letter-spacing:-.5px;position:relative;display:inline-flex;align-items:center;gap:.5rem;padding-top:8px}.site-name-text{display:inline-block}.footer-bottom .wordle-text,.site-name .wordle-text{color:var(--wordle-green)}.footer-bottom .helper-text,.site-name .helper-text{color:var(--wordle-yellow)}.footer-bottom .domain-text,.site-name .domain-text{color:var(--text-primary)}.bookmark-btn{position:absolute;top:-13px;right:-8px;padding:.3rem .6rem;background-color:transparent;border:1.5px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-secondary);font-size:.7rem;font-weight:500;transition:all var(--transition-normal);white-space:nowrap}.bookmark-btn:hover{background-color:var(--wordle-green);border-color:var(--wordle-green);color:var(--white);transform:translateY(-2px)}.share-btn{position:static;padding:.3rem;background-color:transparent;border:1.5px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-secondary);transition:all var(--transition-normal);display:none;flex-shrink:0}.share-btn:hover{background-color:var(--wordle-green);border-color:var(--wordle-green);color:var(--white)}.share-icon{display:block;width:20px;height:20px}.desktop-only{display:block}.mobile-only{display:none}.nav-right{display:flex;align-items:center;gap:1.5rem}.nav-menu{display:flex;align-items:center;gap:clamp(.8rem,1.5vw,2rem)}.nav-link{color:var(--text-primary);font-weight:500;font-size:1rem;text-decoration:none;padding:.5rem 0;position:relative;transition:color var(--transition-fast)}.nav-link::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background-color:var(--wordle-green);transition:width var(--transition-normal)}.nav-link.active::after,.nav-link:hover::after{width:100%}.nav-link.active,.nav-link:hover{color:var(--wordle-green);text-decoration:none}.nav-link-comments{position:relative}.comments-badge{position:absolute;top:-2px;right:-6px;width:8px;height:8px;background-color:#f44;border-radius:50%;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.3);opacity:.8}}.mobile-menu-toggle{display:none;flex-direction:column;gap:5px;width:30px;height:30px;background:0 0;border:none;cursor:pointer;padding:0}.hamburger-line{width:100%;height:3px;background-color:var(--text-primary);border-radius:2px;transition:all var(--transition-normal)}.mobile-menu-toggle.active .hamburger-line:nth-child(1){transform:rotate(45deg) translateY(10px)}.mobile-menu-toggle.active .hamburger-line:nth-child(2){opacity:0}.mobile-menu-toggle.active .hamburger-line:nth-child(3){transform:rotate(-45deg) translateY(-10px)}.hero-section{padding:90px 2rem 20px;background:var(--bg-primary);text-align:center;position:relative;overflow:hidden;margin-bottom:20px}.hero-content{max-width:900px;margin:0 auto;position:relative;z-index:1}.hero-title{font-size:clamp(1.8rem,3.5vw,2.5rem);font-weight:700;margin-bottom:.5rem;background:linear-gradient(135deg,var(--wordle-green) 0,var(--wordle-yellow) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.5px}.hero-description{font-size:clamp(.875rem,1.6vw,1rem);line-height:1.5;color:#888;max-width:750px;margin:0 auto}.hero-description strong{font-weight:600;color:#b0b0b0}.tool-section{padding:0 2rem var(--spacing-xl) 2rem;background-color:var(--bg-primary)}.tool-container{max-width:var(--max-content-width);margin:0 auto;padding:0 2rem}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-lg)}.input-area,.output-area{background-color:var(--bg-secondary);border-radius:var(--radius-lg);padding:var(--spacing-md);box-shadow:0 4px 12px var(--shadow-medium)}.tool-header{text-align:center;margin-bottom:var(--spacing-md)}.tool-header h2{font-size:1.5rem;font-weight:700;margin-bottom:.3rem;color:var(--text-primary)}.tool-subtitle{font-size:.9rem;color:var(--text-secondary)}.input-group{margin-bottom:var(--spacing-lg);max-width:500px;margin-left:auto;margin-right:auto}.input-label{display:flex;align-items:center;justify-content:center;gap:.5rem;font-size:1rem;font-weight:600;margin-bottom:.4rem;color:var(--text-primary)}.label-icon{font-size:1.2rem}.input-hint{font-size:.85rem;color:var(--text-secondary);margin-bottom:.5rem;text-align:center}.letter-inputs-wrapper{position:relative;min-height:55px}.letter-inputs{display:flex;gap:.75rem;justify-content:center}.clear-row-btn{position:absolute;left:50%;bottom:-28px;transform:translateX(-50%);background:0 0;border:none;color:var(--text-secondary);cursor:pointer;padding:.3rem;transition:all var(--transition-fast);display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);opacity:.7}.clear-row-btn:hover{color:var(--wordle-green);opacity:1;background-color:rgba(106,170,100,.1)}.clear-row-btn svg{display:block}.letter-box{width:55px;height:55px;font-size:1.4rem;font-weight:700;text-align:center;text-transform:uppercase;border:2px solid var(--border-color);border-radius:0;background-color:var(--bg-primary);color:var(--text-primary);transition:all var(--transition-fast)}.letter-box:focus{outline:0;border-color:var(--wordle-green);box-shadow:0 0 0 3px rgba(106,170,100,.2);transform:scale(1.05)}.correct-box{background-color:var(--wordle-green);border-color:var(--wordle-green);color:var(--white);box-shadow:inset 0 2px 6px rgba(83,141,78,.4)}.misplaced-box{background-color:var(--wordle-yellow);border-color:var(--wordle-yellow);color:var(--white);box-shadow:inset 0 2px 6px rgba(181,159,59,.4)}.excluded-box{background-color:var(--wordle-gray);border-color:var(--wordle-gray);color:var(--white);box-shadow:inset 0 2px 6px rgba(120,124,126,.4)}.letter-strip{width:100%;max-width:calc(55px * 5 + .75rem * 4);height:55px;padding:0 1rem;margin:0 auto;font-size:1.4rem;font-weight:700;text-align:center;text-transform:uppercase;border:2px solid var(--border-color);border-radius:0;background-color:var(--bg-primary);color:var(--white);transition:all var(--transition-fast);letter-spacing:.2em;display:block}.letter-strip:focus{outline:0;border-color:var(--wordle-green);box-shadow:0 0 0 3px rgba(106,170,100,.2);transform:scale(1.02)}.letter-strip.misplaced-box{background-color:var(--wordle-yellow);border-color:var(--wordle-yellow);box-shadow:inset 0 2px 6px rgba(181,159,59,.4)}.letter-strip.misplaced-box:focus{border-color:#c9b458;box-shadow:0 0 0 3px rgba(201,180,88,.2),inset 0 2px 6px rgba(181,159,59,.4)}.letter-strip.excluded-box{background-color:var(--wordle-gray);border-color:var(--wordle-gray);box-shadow:inset 0 2px 6px rgba(120,124,126,.4)}.letter-strip.excluded-box:focus{border-color:#646669;box-shadow:0 0 0 3px rgba(120,124,126,.2),inset 0 2px 6px rgba(120,124,126,.4)}.action-buttons{display:flex;justify-content:center;margin-top:var(--spacing-lg)}.btn{padding:.85rem 2rem;font-size:1rem;font-weight:600;border-radius:var(--radius-md);display:inline-flex;align-items:center;justify-content:center;gap:.5rem;transition:all var(--transition-normal);cursor:pointer;min-width:200px}.btn-primary{background-color:var(--wordle-green);color:var(--white);box-shadow:0 4px 12px rgba(106,170,100,.3)}.btn-primary:hover{background-color:#538d4e;transform:translateY(-2px);box-shadow:0 6px 16px rgba(106,170,100,.4)}.btn-secondary{background-color:var(--bg-tertiary);color:var(--text-primary);border:2px solid var(--border-color)}.btn-secondary:hover{background-color:var(--border-color);transform:translateY(-2px)}.output-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-md);padding-bottom:var(--spacing-sm);border-bottom:2px solid var(--border-color)}.output-header h3{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.result-count{font-size:.9rem;color:var(--text-secondary);font-weight:500}.output-content{min-height:350px;max-height:500px;overflow-y:auto;padding:.5rem}.output-content::-webkit-scrollbar{width:8px}.output-content::-webkit-scrollbar-track{background:#2a2a2a;border-radius:4px}.output-content::-webkit-scrollbar-thumb{background:#6a6a6a;border-radius:4px}.output-content::-webkit-scrollbar-thumb:hover{background:#7a7a7a}.placeholder-message{display:flex;flex-direction:column;align-items:center;justify-content:center;height:350px;text-align:center;color:var(--text-secondary)}.placeholder-message svg{margin-bottom:var(--spacing-sm);opacity:.5;width:48px;height:48px}.placeholder-message p{max-width:350px;font-size:.95rem;line-height:1.6;color:#888}.placeholder-message p strong{color:#b0b0b0}.word-results{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-sm)}.word-item{position:relative;padding:1rem;background-color:var(--bg-primary);border:2px solid var(--border-color);border-radius:var(--radius-md);text-align:center;font-size:1.2rem;font-weight:700;text-transform:uppercase;transition:all var(--transition-fast)}.word-score{position:absolute;top:-8px;right:-8px;padding:.2rem .4rem;border-radius:var(--radius-sm);font-size:.65rem;font-weight:700;color:var(--white);line-height:1;box-shadow:0 2px 4px var(--shadow-light);transition:all var(--transition-fast);pointer-events:none;z-index:1}.word-score.score-high{background:linear-gradient(135deg,var(--wordle-green),#538d4e)}.word-score.score-medium{background:linear-gradient(135deg,var(--wordle-yellow),#b59f3b)}.word-score.score-low{background:linear-gradient(135deg,var(--wordle-gray),#787c7e)}.word-item .letter-correct{color:var(--wordle-green);font-weight:700}.word-item .letter-misplaced{color:var(--wordle-yellow);font-weight:700}.content-container{max-width:var(--max-content-width);margin:0 auto;padding:0 2rem}.section-title{font-size:clamp(1.75rem,3.5vw,2.2rem);font-weight:700;text-align:center;margin-bottom:var(--spacing-md);color:var(--text-primary)}.section-intro{text-align:center;font-size:clamp(.875rem,1.6vw,1rem);color:#888;max-width:750px;margin:0 auto var(--spacing-lg);line-height:1.5}.section-intro strong{font-weight:600;color:#b0b0b0}.how-to-section{padding:var(--spacing-xl) 2rem;background-color:var(--bg-secondary)}.steps-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-md);margin-bottom:var(--spacing-md)}@media (max-width:900px){.steps-grid{grid-template-columns:1fr}}.step-card{background-color:var(--bg-primary);border-radius:var(--radius-md);padding:var(--spacing-md);box-shadow:0 2px 8px var(--shadow-light);transition:transform var(--transition-normal),box-shadow var(--transition-normal)}.step-card:hover{transform:translateY(-4px);box-shadow:0 8px 16px var(--shadow-medium)}.step-header{display:flex;align-items:center;gap:var(--spacing-sm);margin-bottom:var(--spacing-sm)}.step-number{width:40px;height:40px;background-color:var(--wordle-green);color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700;flex-shrink:0}.step-card h3{font-size:1.1rem;font-weight:600;margin:0;color:var(--text-primary);line-height:1.2}.step-card p{color:#888;line-height:1.5;font-size:.9rem}.highlight-green{color:var(--wordle-green);font-weight:600}.highlight-yellow{color:#b59f3b;font-weight:600}.highlight-gray{color:var(--wordle-gray);font-weight:600}.tip-box{background-color:#3a3420;color:#f4e4a6 border-left: 4px solid var(--wordle-yellow);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);font-size:.9rem}.key-features-section{padding:var(--spacing-xl) 2rem;background-color:var(--bg-primary)}.features-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-xl);margin-top:var(--spacing-lg)}.feature-card{background-color:var(--bg-secondary);border-radius:var(--radius-lg);padding:var(--spacing-xl);border:2px solid var(--border-color);transition:all var(--transition-normal);text-align:left;display:flex;flex-direction:column;gap:var(--spacing-md)}.feature-card:hover{border-color:var(--wordle-green);box-shadow:0 8px 24px var(--shadow-medium);transform:translateY(-4px)}.feature-header{display:flex;align-items:center;gap:var(--spacing-sm)}.feature-icon{font-size:2.5rem;line-height:1;flex-shrink:0}.feature-card h3{font-size:1.4rem;font-weight:700;color:var(--text-primary);margin:0;line-height:1.2}.feature-card p{color:#888;line-height:1.7;font-size:1rem;margin:0}@media (max-width:768px){.features-grid{grid-template-columns:1fr;gap:var(--spacing-lg)}.feature-card{padding:var(--spacing-lg)}.feature-icon{font-size:2.2rem}.feature-card h3{font-size:1.2rem}.feature-card p{font-size:.95rem}}.starting-words-section{padding:var(--spacing-xl) 2rem var(--spacing-lg);background-color:var(--bg-secondary)}.intro-text{max-width:750px;margin:0 auto var(--spacing-lg);font-size:clamp(.875rem,1.6vw,1rem);line-height:1.5;color:#888;text-align:center}.intro-text strong{font-weight:600;color:#b0b0b0}.strategy-factors-compact{margin-top:var(--spacing-lg);padding:var(--spacing-lg) 0}.strategy-factors-compact h3{font-size:1.3rem;font-weight:700;margin-bottom:var(--spacing-lg);color:var(--text-primary);text-align:center}.factors-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:var(--spacing-md)}.factor-item{background-color:var(--bg-primary);padding:var(--spacing-md);border-radius:var(--radius-md);text-align:center;border-top:4px solid var(--wordle-green);transition:all var(--transition-normal);display:flex;flex-direction:column;gap:.5rem;min-height:120px}.factor-item:hover{transform:translateY(-5px);box-shadow:0 6px 16px var(--shadow-medium);border-top-color:#538d4e}.factor-item strong{color:var(--text-primary);font-weight:600;font-size:1rem;display:block}.factor-item::after{content:attr(data-desc);font-size:.85rem;color:var(--text-secondary);line-height:1.4}@media (max-width:1024px){.factors-grid{grid-template-columns:repeat(3,1fr)}}@media (max-width:768px){.factors-grid{grid-template-columns:repeat(2,1fr)}}.top-words-list{margin-bottom:0}.words-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:var(--spacing-sm)}@media (max-width:1400px){.words-grid{grid-template-columns:repeat(4,1fr)}}@media (max-width:1100px){.words-grid{grid-template-columns:repeat(3,1fr)}}@media (max-width:768px){.words-grid{grid-template-columns:repeat(2,1fr)}}.word-card{background-color:var(--bg-primary);border-radius:var(--radius-md);padding:var(--spacing-md);border:2px solid var(--border-color);transition:all var(--transition-normal);position:relative}.word-card:hover{border-color:var(--wordle-green);box-shadow:0 4px 12px var(--shadow-medium);transform:translateX(4px)}.word-rank{position:absolute;top:var(--spacing-md);right:var(--spacing-md);width:40px;height:40px;background-color:var(--wordle-green);color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem}.word-main{font-size:1.6rem;font-weight:700;color:var(--wordle-green);margin-bottom:.3rem;letter-spacing:1px}.word-variants{font-size:.85rem;color:var(--text-secondary);margin-bottom:.5rem;font-style:italic}.word-card p{color:#888;line-height:1.5;font-size:.9rem}.authority-note{background-color:#e8f5e9;border-left:4px solid var(--wordle-green);padding:var(--spacing-md);border-radius:var(--radius-md);margin-top:var(--spacing-xl);font-size:.95rem;line-height:1.7;color:#2e7d32}[data-theme=dark] .authority-note{background-color:#1b3c1e;color:#a5d6a7}.letter-recommendations-section{padding:var(--spacing-xl) 2rem;background-color:var(--bg-primary)}.letter-strategy{margin-bottom:var(--spacing-xl)}.letter-strategy h3{font-size:1.8rem;font-weight:600;margin-bottom:var(--spacing-lg);color:var(--text-primary)}.strategy-subtitle{font-size:1.4rem;font-weight:600;margin-bottom:var(--spacing-md);color:var(--text-primary);text-align:center}.letter-group{display:grid;grid-template-columns:repeat(5,1fr);gap:var(--spacing-md);margin-bottom:var(--spacing-md)}.letter-group.consonants-group{grid-template-columns:repeat(6,1fr)}@media (max-width:1024px){.letter-group{grid-template-columns:repeat(3,1fr)}.letter-group.consonants-group{grid-template-columns:repeat(3,1fr)}}.letter-item{background-color:var(--bg-secondary);border-radius:var(--radius-md);padding:var(--spacing-md);border:2px solid var(--border-color);transition:all var(--transition-normal)}.letter-item:hover{transform:translateY(-4px);box-shadow:0 4px 12px var(--shadow-medium)}.letter-item.best{border-color:var(--wordle-green);background-color:rgba(106,170,100,.1)}.letter-item.recommended{border-color:var(--wordle-yellow);background-color:rgba(201,180,88,.1)}.letter-item .letter{display:block;font-size:2.5rem;font-weight:800;color:var(--wordle-green);margin-bottom:.5rem;text-align:center}.letter-item .frequency{display:block;font-size:1.2rem;font-weight:600;color:var(--text-secondary);margin-bottom:var(--spacing-sm);text-align:center}.letter-item p{font-size:.9rem;color:#888;line-height:1.5;text-align:left}.strategy-note{background-color:var(--bg-secondary);border-left:4px solid var(--wordle-green);padding:var(--spacing-md);border-radius:var(--radius-md);font-size:1rem;line-height:1.7;color:#888}.avoid-letters-compact{background-color:rgba(211,214,218,.3);border-left:4px solid var(--wordle-gray);border-radius:var(--radius-sm);padding:var(--spacing-sm) var(--spacing-md);margin-bottom:var(--spacing-lg);font-size:.95rem;color:#888;display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}.avoid-letters-compact strong{color:var(--text-primary);font-size:1rem}.rare-letters-inline{display:inline-flex;flex-wrap:wrap;gap:.4rem;align-items:center}.rare-letter-inline{display:inline-block;padding:.15rem .5rem;background-color:var(--wordle-gray);color:var(--white);border-radius:var(--radius-sm);font-weight:600;font-size:.85rem}.avoid-note{font-style:italic;opacity:.8;font-size:.9rem}.optimal-combination{background:linear-gradient(135deg,rgba(106,170,100,.1),rgba(106,170,100,.05));border:2px solid var(--wordle-green);border-radius:var(--radius-lg);padding:var(--spacing-md)}.optimal-combination h3{font-size:1.3rem;font-weight:600;margin-bottom:var(--spacing-sm);color:var(--text-primary);text-align:center}.formula-box{background-color:var(--bg-primary);border-radius:var(--radius-md);padding:var(--spacing-md)}.formula-title{font-size:1.1rem;font-weight:700;color:var(--wordle-green);margin-bottom:var(--spacing-sm);text-align:center}.formula-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-sm);margin-bottom:var(--spacing-md)}.formula-item{display:flex;align-items:flex-start;gap:.5rem;padding:.6rem;background-color:var(--bg-secondary);border-radius:var(--radius-sm);border-left:3px solid var(--wordle-green)}.formula-icon{color:var(--wordle-green);font-weight:700;font-size:1rem;flex-shrink:0}.formula-text{font-size:.9rem;color:var(--text-primary);line-height:1.4}.formula-note{font-size:.85rem;color:#888;font-style:italic;line-height:1.5;text-align:center}.statistics-section{padding:var(--spacing-xl) 2rem;background-color:var(--bg-secondary)}.charts-container{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-xl);margin-bottom:var(--spacing-xl)}.chart-card{background-color:var(--bg-primary);border-radius:var(--radius-lg);padding:var(--spacing-lg) var(--spacing-lg) var(--spacing-md);box-shadow:0 2px 8px var(--shadow-light)}.chart-card-full{width:100%;margin-bottom:calc(var(--spacing-xl) * 1.5)}.chart-card h3{font-size:1.3rem;font-weight:600;margin-bottom:var(--spacing-md);color:var(--text-primary);text-align:center}.chart-card canvas{max-height:280px;width:100%!important;height:auto!important}.chart-wrapper{position:relative;min-height:250px;display:flex;align-items:center;justify-content:center}.chart-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:300px;color:var(--text-secondary)}.chart-loading .loading-spinner{width:40px;height:40px;border:4px solid 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svg{width:24px;height:24px}@media (max-width:768px){.back-to-top{bottom:20px;right:20px;width:45px;height:45px}.avoid-letters-compact{font-size:.9rem;padding:var(--spacing-xs) var(--spacing-sm)}.avoid-letters-compact strong{font-size:.95rem;width:100%;margin-bottom:.25rem}.rare-letter-inline{font-size:.8rem;padding:.1rem .4rem}.avoid-note{font-size:.85rem;width:100%;text-align:left;margin-top:.25rem}}.blog-hero-image{text-align:center;margin:var(--spacing-lg) auto;padding:0;display:flex;justify-content:center;align-items:center}.blog-hero-image .hero-image{width:300px;height:300px;object-fit:cover;border-radius:var(--radius-md);box-shadow:var(--shadow-medium);border:1px solid var(--border-color);background:var(--bg-secondary);display:block}.hero-image{text-align:center;margin:var(--spacing-md) auto var(--spacing-sm) auto;padding:0;display:flex;justify-content:center;align-items:center}.hero-image 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