:root{--primary-color: #4a0e4e;--secondary-color: #d4af37;--bg-color: #f5f5f5;--text-color: #333;--card-bg: #ffffff;--font-roman: "Cinzel", serif;--font-ui: "Inter", sans-serif;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05)}@media(prefers-color-scheme:dark){:root{--bg-color: #1a1a1a;--text-color: #f5f5f5;--card-bg: #2d2d2d;--primary-color: #9c27b0}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-ui);background-color:var(--bg-color);color:var(--text-color);line-height:1.6;transition:background-color .3s ease,color .3s ease}#app{max-width:800px;margin:0 auto;padding:2rem;min-height:100vh;display:flex;flex-direction:column}header{text-align:center;margin-bottom:3rem}h1{font-family:var(--font-roman);font-size:3rem;color:var(--primary-color);margin-bottom:.5rem;text-shadow:1px 1px 2px rgba(0,0,0,.1)}nav{display:flex;justify-content:center;gap:1.5rem;margin-bottom:2rem}nav a{text-decoration:none;color:var(--text-color);font-weight:600;padding:.5rem 1rem;border-radius:.5rem;transition:all .2s ease}nav a:hover,nav a.active{background-color:var(--primary-color);color:#fff}.converter-card{background:var(--card-bg);padding:2rem;border-radius:1rem;box-shadow:var(--shadow-lg);border:1px solid rgba(0,0,0,.05)}.input-group{margin-bottom:2rem}label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--text-color)}input{width:100%;padding:1rem;font-size:1.25rem;border:2px solid #ddd;border-radius:.5rem;background:var(--bg-color);color:var(--text-color);transition:border-color .2s ease}input:focus{outline:none;border-color:var(--primary-color)}.result-area{text-align:center;margin-top:2rem;padding-top:2rem;border-top:1px solid #eee}.result-value{font-family:var(--font-roman);font-size:4rem;color:var(--secondary-color);margin:1rem 0;word-break:break-word;line-height:1.2}.error-message{color:#ef4444;font-weight:600;margin-top:.5rem;min-height:1.5rem}.date-inputs{display:flex;gap:1rem}@media(max-width:600px){h1{font-size:2rem}.result-value{font-size:2.5rem}.date-inputs{flex-direction:column}}