.app-container{background:var(--background);flex-direction:column;width:100%;max-width:1000px;height:100dvh;margin:0 auto;display:flex;position:relative;overflow:hidden}@media (width>=1000px){.app-container{border-radius:var(--radius);border:1px solid var(--border);height:calc(100vh - 4rem);margin:2rem auto;overflow:hidden;box-shadow:0 20px 50px #0000001a}}.header{background:var(--surface);border-bottom:1px solid var(--border);text-align:center;z-index:10;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:rgba(var(--surface-rgb), .8);flex-shrink:0;padding:1.5rem 1rem;position:relative;top:0}.header h1{color:var(--primary);font-size:1.5rem}.main-content{-webkit-overflow-scrolling:touch;flex:1;padding:1.5rem;overflow-y:auto}.nav-bar{background:rgba(var(--surface-rgb), .8);border-top:1px solid var(--border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:10;flex-shrink:0;justify-content:space-around;width:100%;padding:.75rem 1rem;display:flex;box-shadow:0 -2px 10px #0000000d}.nav-item{color:var(--text-muted);cursor:pointer;background:0 0;border:none;flex-direction:column;flex:1;align-items:center;gap:.25rem;transition:all .2s;display:flex}.nav-item span{font-size:.75rem;font-weight:500}.nav-item.active{color:var(--primary)}.nav-item:hover{color:var(--primary);transform:translateY(-2px)}.search-container{background:var(--background);z-index:5;border-bottom:1px solid #0000;gap:.5rem;margin-bottom:1.5rem;padding:1.5rem 0 1rem;transition:border-color .2s;display:flex;position:sticky;top:-1.5rem}.search-input{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);outline:none;flex:1;padding:.75rem 1rem;font-size:1rem;transition:border-color .2s}.search-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.btn-primary{background:var(--primary);color:#fff;border-radius:var(--radius);cursor:pointer;border:none;padding:.75rem 1.5rem;font-weight:600;transition:background .2s}.btn-primary:hover{background:var(--primary-hover)}.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);margin-bottom:1.25rem;padding:1.5rem}.card.interactive{cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1)}.card.interactive:hover{box-shadow:var(--shadow-lg);border-color:var(--primary);transform:translateY(-4px)}.result-header{align-items:flex-start;gap:1rem;display:flex}.char-display{color:var(--text);text-align:center;min-width:3rem;font-size:2.5rem;font-weight:700}.pronunciation-list{flex-direction:column;gap:1rem;display:flex}.pronunciation-item{border-left:3px solid var(--primary);padding-left:1rem}.pronunciation-text{color:var(--primary);margin-bottom:.5rem;font-size:1.25rem;font-weight:700}.explanation-list{flex-direction:column;gap:.25rem;display:flex}.explanation-item{color:var(--text);font-size:1rem}:root{--primary:#36a66d;--primary-rgb:54, 166, 109;--primary-hover:#2d8b5b;--background:#f8fafc;--surface:#fff;--surface-rgb:255, 255, 255;--text:#1e293b;--text-muted:#64748b;--border:#e2e8f0;--radius:12px;--shadow:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a}@media (prefers-color-scheme:dark){:root{--background:#0f172a;--surface:#1e293b;--surface-rgb:30, 41, 59;--text:#f1f5f9;--text-muted:#94a3b8;--border:#334155;--primary:#4ade80;--primary-rgb:74, 222, 128;--primary-hover:#86efac}}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;margin:0;overflow:hidden}body{background-color:var(--background);color:var(--text);-webkit-font-smoothing:antialiased;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5}#root{flex-direction:column;height:100%;display:flex}h1,h2,h3{letter-spacing:-.025em;font-weight:700}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--background)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.3s ease-out forwards fadeIn}