:root{--primary-dark:#1e3a5f;--accent:#2b6f9b;--accent-light:#e8f0fe;--bg-soft:#f4f6f9;--surface:#ffffff;--text-main:#1e2b3c;--text-muted:#5f6b7a;--border:#d9e0e8;--white:#ffffff;}body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;background-color:var(--bg-soft);color:var(--text-main);margin:0;line-height:1.6;}header{background-color:var(--primary-dark);color:var(--white);padding:1rem 2rem;box-shadow:0 2px 8px rgba(0,20,40,0.15);}#weeks,#months{border-color:var(--accent);background-color:var(--accent-light);}nav{max-width:1000px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;}.logo{font-size:1.35rem;font-weight:600;letter-spacing:0.5px;color:#ffffff;opacity:0.95;}.nav-links a{color:#b0c4de;text-decoration:none;margin-left:1.8rem;font-size:0.95rem;transition:color 0.2s ease;}.nav-links a:hover{color:var(--white);}main{max-width:1000px;margin:2rem auto;padding:0 1.5rem;}main a{color:var(--accent);text-decoration:none;border-bottom:1px solid transparent;font-weight:500;transition:all 0.3s ease;}main a:hover{color:var(--primary-dark);border-bottom-color:var(--primary-dark);}strong{color:var(--primary-dark);font-weight:600;}.breadcrumb{font-size:0.85rem;color:var(--text-muted);margin-bottom:1.5rem;letter-spacing:0.3px;}.quick-nav{display:flex;gap:0.5rem;margin-bottom:1.5rem;flex-wrap:wrap;border-bottom:1px solid var(--border);padding-bottom:0.5rem;}.nav-tab{padding:8px 16px;font-size:0.9rem;color:var(--text-muted);border-radius:6px;transition:all 0.2s ease;cursor:pointer;text-decoration:none !important;border-bottom:none !important;}.nav-tab:hover{background-color:var(--accent-light);color:var(--accent);}.nav-tab.active{background-color:var(--accent);color:var(--white);font-weight:600;}@media (max-width:480px){.quick-nav{justify-content:center;}.nav-tab{font-size:0.8rem;padding:6px 12px;}}.tool-card{background:var(--surface);padding:2.5rem;border-radius:16px;box-shadow:0 10px 25px -8px rgba(0,30,50,0.15);margin-bottom:2.5rem;border:1px solid var(--border);}.tool-header{text-align:center;margin-bottom:2.2rem;}.tool-header h1{margin:0;color:var(--primary-dark);font-size:1.9rem;font-weight:600;letter-spacing:-0.02em;}.tool-header p{color:var(--text-muted);margin-top:0.6rem;font-size:1rem;}.settings-bar{background:var(--bg-soft);padding:1rem 1.5rem;border-radius:10px;margin-bottom:2rem;display:flex;align-items:center;justify-content:center;gap:1rem;border:1px dashed var(--border);}.settings-bar label{font-weight:600;color:var(--primary-dark);font-size:0.95rem;}.settings-bar input[type="date"]{width:auto;padding:8px 14px;cursor:pointer;}.converter-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;margin-bottom:2rem;}@media (max-width:768px){.converter-grid{grid-template-columns:1fr 1fr;}}@media (max-width:480px){.converter-grid{grid-template-columns:1fr;}.settings-bar{flex-direction:column;align-items:stretch;}}.input-group label{display:block;font-size:0.85rem;font-weight:600;margin-bottom:0.5rem;color:var(--primary-dark);text-transform:uppercase;letter-spacing:0.3px;}input{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:8px;font-size:1.1rem;box-sizing:border-box;background:#ffffff;transition:all 0.2s ease;color:var(--text-main);}input:focus{outline:none;border-color:var(--accent);background:var(--white);box-shadow:0 0 0 4px rgba(43,111,155,0.12);}.result-display{background:var(--accent-light);border-radius:10px;padding:1.8rem;border-left:5px solid var(--accent);display:none;animation:fadeIn 0.3s ease-in-out;}@keyframes fadeIn{from{opacity:0;transform:translateY(-5px);}to{opacity:1;transform:translateY(0);}}.result-display.active{display:block;}.result-line{margin:0.8rem 0;font-size:1.05rem;color:var(--text-main);}.result-line strong{color:var(--accent);background-color:rgba(43,111,155,0.1);padding:2px 8px;border-radius:6px;font-weight:700;letter-spacing:0.5px;}.content-section{background:var(--surface);padding:2.2rem;border-radius:16px;margin-bottom:2.5rem;border:1px solid var(--border);}h2{font-size:1.35rem;color:var(--primary-dark);border-bottom:2px solid var(--bg-soft);padding-bottom:0.7rem;margin-top:0.2rem;font-weight:600;}.step-list{padding-left:1.5rem;}.step-list li{margin-bottom:0.9rem;color:var(--text-main);}footer{text-align:center;padding:3rem 1.5rem;background:var(--primary-dark);color:#9aaec5;font-size:0.9rem;border-top:1px solid rgba(255,255,255,0.05);}.footer-links{margin-bottom:1rem;}.footer-links a{color:#cbd5e1;text-decoration:none;margin:0 12px;transition:color 0.2s;}.footer-links a:hover{color:var(--white);text-decoration:underline;}h3{font-size:1.15rem;color:var(--accent);margin-top:1.8rem;margin-bottom:0.8rem;display:flex;align-items:center;}h3::before{content:"";display:inline-block;width:4px;height:1.2rem;background-color:var(--accent);margin-right:10px;border-radius:2px;}table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:0.95rem;border:1px solid var(--border);border-radius:8px;overflow:hidden;}th{background-color:var(--bg-soft);color:var(--primary-dark);font-weight:600;padding:14px 12px;text-align:left;border-bottom:2px solid var(--border);}td{padding:12px;border-bottom:1px solid var(--border);color:var(--text-main);}tr:last-child td{border-bottom:none;}tr:hover{background-color:var(--accent-light);}.faq-item{margin-bottom:1.5rem;}.faq-item strong{display:block;margin-bottom:5px;color:var(--primary-dark);}@media (max-width:768px){nav{flex-direction:column;gap:1rem;}.nav-links{display:flex;justify-content:center;width:100%;}.nav-links a{margin:0 10px;font-size:0.85rem;}.converter-grid{grid-template-columns:1fr 1fr;}}