.skip-link{position:absolute;top:-40px;left:0;background:#0A4D68;color:#fff;padding:8px 16px;z-index:9999;font-size:14px;border-radius:0 0 4px 0;transition:top .2s;text-decoration:none}.skip-link:focus{top:0}
        :root{--primary:#0A4D68;--primary-dark:#06384d;--accent:#047857;--secondary:#D97706;--bg-body:#FAFAF9;--bg-card:#FFFFFF;--text-main:#1C1917;--text-muted:#57534E;--border-subtle:#E7E5E4;--container-width:1200px;--header-height:90px;--bg-calc-item:#FFFFFF;--border-calc:#E7E5E4}
        [data-theme="dark"]{--bg-body:#0C0A09;--bg-card:#1C1917;--text-main:#F5F5F4;--text-muted:#A8A29E;--primary:#38BDF8;--accent:#34D399;--border-subtle:#292524;--bg-calc-item:#292524;--border-calc:#44403C}
        *{margin:0;padding:0;box-sizing:border-box}body{font-family:'Source Sans 3',sans-serif;background-color:var(--bg-body);color:var(--text-main);line-height:1.7;transition:background-color 0.5s,color 0.5s}
        h1,h2,h3,h4{font-family:'Playfair Display',serif;font-weight:700;color:var(--primary);letter-spacing:-0.02em}
        a{text-decoration:none;color:inherit;transition:0.3s}ul{list-style:none}
        @keyframes rotate-scale{0%{transform:rotate(0) scale(1)}50%{transform:rotate(180deg) scale(1.2)}100%{transform:rotate(360deg) scale(1)}}
        .animate-theme-switch i,.animate-theme-switch svg{animation:rotate-scale 0.5s ease-in-out}
        .container{max-width:var(--container-width);margin:0 auto;padding:0 24px}
        .top-bar{background-color:#0A4D68;color:#fff;padding:8px 0;font-size:0.85rem;z-index:1002}.top-bar .container{display:flex;justify-content:flex-end;gap:20px;padding-right:20px}
        .lang-selector{display:flex;align-items:center;gap:5px}.lang-selector select{background:transparent;color:#fff;border:none;font-size:0.85rem;cursor:pointer;outline:none}.lang-selector select option{color:#000}
        .main-header{background-color:var(--bg-card);border-bottom:1px solid var(--border-subtle);width:100%;z-index:1000;height:var(--header-height);position:sticky;top:0}.main-header .container{display:flex;justify-content:space-between;align-items:center;height:100%;padding-left:40px;padding-right:40px}
        .logo{font-family:'Playfair Display',serif;font-size:2rem;font-weight:700;color:var(--primary);display:flex;align-items:center;gap:12px;letter-spacing:-0.03em}
        .nav-menu{display:flex;gap:32px}.nav-link{font-family:'Source Sans 3',sans-serif;font-weight:600;color:var(--text-muted);font-size:1rem;text-transform:uppercase;letter-spacing:0.05em;position:relative}
        .nav-link::after{content:'';position:absolute;width:0;height:2px;bottom:-4px;left:0;background-color:var(--secondary);transition:width 0.3s}.nav-link:hover::after{width:100%}.nav-link:hover{color:var(--primary)}
        .btn-outline-white{border:1px solid var(--primary);color:var(--primary);padding:8px 24px;border-radius:2px;text-transform:uppercase;font-size:0.85rem;font-weight:600;letter-spacing:0.05em}.btn-outline-white:hover{background-color:var(--primary);color:#fff}
        .tool-hero{background:linear-gradient(135deg,#6d28d9 0%,#4c1d95 100%);color:#fff;padding:60px 0 80px;text-align:center}
        .tool-hero h1{color:#fff;font-size:3rem;margin-bottom:15px}.tool-hero p{max-width:700px;margin:0 auto;opacity:0.9;font-size:1.2rem;font-weight:300}
        .tool-badge{background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.2);padding:5px 15px;border-radius:50px;font-size:0.8rem;text-transform:uppercase;letter-spacing:0.1em;display:inline-flex;align-items:center;gap:8px;margin-bottom:20px}
        .calc-section{padding:60px 0 80px}
        .calc-card{background-color:var(--bg-card);padding:40px;border-radius:8px;box-shadow:0 20px 40px rgba(0,0,0,0.1);border-top:5px solid #7c3aed;max-width:700px;margin:0 auto}
        .inputs-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:20px}
        .input-group{margin-bottom:0}.input-group label{display:block;font-weight:600;font-size:0.9rem;margin-bottom:8px;color:var(--text-main)}
        .form-control{width:100%;padding:14px;border:1px solid var(--border-calc);border-radius:4px;font-size:1rem;background-color:var(--bg-calc-item);color:var(--text-main);transition:border-color 0.3s}.form-control:focus{outline:none;border-color:#7c3aed;box-shadow:0 0 0 3px rgba(124,58,237,0.1)}
        .input-group-full{margin-bottom:20px}.input-group-full label{display:block;font-weight:600;font-size:0.9rem;margin-bottom:8px;color:var(--text-main)}
        .btn-calculate{width:100%;padding:16px;background:linear-gradient(135deg,#7c3aed,#4c1d95);color:#fff;border:none;border-radius:4px;font-size:1.1rem;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:transform 0.2s,box-shadow 0.2s;margin-top:10px}.btn-calculate:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(124,58,237,0.3)}
        .results-container{margin-top:40px}
        .summary-box{background:linear-gradient(135deg,#ede9fe,#f5f3ff);border:1px solid #c4b5fd;border-radius:8px;padding:20px 24px;margin-bottom:30px;display:grid;grid-template-columns:1fr 1fr;gap:12px}
        [data-theme="dark"] .summary-box{background:rgba(124,58,237,0.15);border-color:#7c3aed}
        .summary-item{font-size:0.9rem}.summary-item strong{color:#6d28d9;display:block;margin-bottom:4px}[data-theme="dark"] .summary-item strong{color:#a78bfa}
        .cycles-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
        .cycle-card{border-radius:8px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,0.07)}
        .cycle-card-header{padding:14px 18px;font-weight:700;font-size:0.95rem;color:#fff}
        .cycle-card-header.purple{background:linear-gradient(135deg,#7c3aed,#4c1d95)}
        .cycle-card-body{background:var(--bg-card);border:1px solid var(--border-subtle);border-top:none;padding:16px 18px}
        .cycle-row{margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid var(--border-subtle)}.cycle-row:last-child{margin-bottom:0;padding-bottom:0;border-bottom:none}
        .cycle-row-label{font-size:0.78rem;text-transform:uppercase;letter-spacing:0.06em;color:var(--text-muted);font-weight:600;margin-bottom:4px}
        .cycle-row-value{font-size:0.95rem;font-weight:600}
        .badge-period{background:#e0e7ff;color:#3730a3;padding:3px 10px;border-radius:50px;font-size:0.82rem;font-weight:700}
        .badge-ovulation{background:#fce7f3;color:#9d174d;padding:3px 10px;border-radius:50px;font-size:0.82rem;font-weight:700}
        .badge-fertile{background:#d1fae5;color:#065f46;padding:3px 10px;border-radius:50px;font-size:0.82rem;font-weight:700}
        .disclaimer-box{background:#fef9c3;border-left:4px solid #ca8a04;padding:16px 20px;border-radius:4px;font-size:0.9rem;color:#78350f;margin-top:30px}
        [data-theme="dark"] .disclaimer-box{background:rgba(202,138,4,0.15);color:#fcd34d}
        .info-section{background-color:var(--bg-card);padding:80px 0}
        .info-section h2{font-size:1.8rem;margin-bottom:16px}
        .info-section p{color:var(--text-muted);line-height:1.8;margin-bottom:1.5em}
        footer{background-color:#1C1917;color:#A8A29E;padding:80px 0 0;font-size:0.95rem;border-top:4px solid var(--accent)}
        .footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:40px;padding-bottom:60px}
        footer h4{color:#fff;font-size:1.2rem;margin-bottom:20px;font-family:'Playfair Display',serif}footer h4::after{content:'';display:block;width:30px;height:2px;background:var(--accent);margin-top:8px}
        footer ul li{margin-bottom:10px}footer ul li a{color:#A8A29E;transition:0.2s;display:inline-block}footer ul li a:hover{color:#fff;transform:translateX(5px)}
        .footer-bottom{border-top:1px solid #333;padding:25px 0;text-align:center;font-size:0.85rem;background:#151312}
        @media(max-width:900px){.nav-menu{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}.inputs-grid{grid-template-columns:1fr}.cycles-grid{grid-template-columns:1fr}.summary-box{grid-template-columns:1fr}.main-header .container{padding-left:20px}}