.calculator-card{background:var(--bg-card);border-radius:12px;padding:2rem;margin-bottom:2rem;box-shadow:0 4px 6px -1px rgba(0,0,0,.3)}.form-group{margin-bottom:1.5rem}.form-group label{display:block;font-weight:600;margin-bottom:.5rem;color:#e2e8f0;font-size:.95rem}.form-group input[type=date],.form-group input[type=number]{width:100%;max-width:320px;padding:.75rem 1rem;border:2px solid #334155;border-radius:8px;background:#0f172a;color:#f1f5f9;font-size:1rem;transition:border-color .2s ease}.form-group input:focus{outline:0;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-muted)}.form-hint{display:block;margin-top:.35rem;color:#94a3b8;font-size:.82rem}.btn-primary{background:var(--color-primary);color:#0f172a;border:none;padding:.85rem 2rem;border-radius:8px;font-size:1rem;font-weight:700;cursor:pointer;transition:background .2s ease,transform .1s ease}.btn-primary:hover{background:#22d3ee;transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.hidden{display:none!important}.summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin-bottom:2rem}.summary-card{background:var(--bg-card);border-radius:10px;padding:1.25rem;text-align:center;border-left:4px solid var(--color-primary);box-shadow:0 2px 4px rgba(0,0,0,.2)}.summary-card.cycle-day{border-left-color:#8b5cf6}.summary-card.next-ovulation{border-left-color:#f59e0b}.summary-card.fertile-window{border-left-color:#10b981}.summary-card.next-period{border-left-color:#ef4444}.summary-label{display:block;font-size:.82rem;color:#94a3b8;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.5rem}.summary-value{display:block;font-size:1.15rem;font-weight:700;color:#f1f5f9}.summary-sub{display:block;font-size:.85rem;color:#cbd5e1;margin-top:.25rem}.phase-indicator{background:var(--bg-card);border-radius:10px;padding:1.5rem;margin-bottom:2rem;text-align:center}.phase-indicator h3{margin-bottom:1rem;color:#e2e8f0}.phase-badge{display:inline-block;padding:.5rem 1.5rem;border-radius:20px;font-weight:700;font-size:1.1rem;margin-bottom:.75rem}.phase-badge.menstrual{background:rgba(239,68,68,.2);color:#fca5a5;border:1px solid rgba(239,68,68,.4)}.phase-badge.follicular{background:rgba(139,92,246,.2);color:#c4b5fd;border:1px solid rgba(139,92,246,.4)}.phase-badge.ovulation{background:rgba(245,158,11,.2);color:#fcd34d;border:1px solid rgba(245,158,11,.4)}.phase-badge.luteal{background:var(--color-primary-muted);color:#67e8f9;border:1px solid var(--color-primary-muted)}.phase-desc{color:#94a3b8;font-size:.9rem;max-width:600px;margin:0 auto;line-height:1.5}.calendar-section{background:var(--bg-card);border-radius:10px;padding:1.5rem;margin-bottom:2rem}.calendar-section h3{margin-bottom:1rem;color:#e2e8f0}.calendar-nav{display:flex;align-items:center;justify-content:center;gap:1rem;margin-bottom:1rem}.btn-nav{background:#334155;color:#e2e8f0;border:none;padding:.5rem 1rem;border-radius:6px;font-size:1.1rem;cursor:pointer;transition:background .2s ease}.btn-nav:hover{background:#475569}.calendar-month-label{font-size:1.1rem;font-weight:600;color:#f1f5f9;min-width:180px;text-align:center}.calendar-container{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;max-width:500px;margin:0 auto}.calendar-header-cell{text-align:center;font-weight:600;font-size:.8rem;color:#94a3b8;padding:.5rem 0;text-transform:uppercase}.calendar-day{aspect-ratio:1;display:flex;align-items:center;justify-content:center;border-radius:8px;font-size:.85rem;font-weight:500;color:#e2e8f0;position:relative;transition:transform .1s ease}.calendar-day.empty{background:0 0}.calendar-day.normal{background:#1e293b}.calendar-day.period{background:rgba(239,68,68,.25);color:#fca5a5;border:1px solid rgba(239,68,68,.4)}.calendar-day.fertile{background:rgba(16,185,129,.25);color:#6ee7b7;border:1px solid rgba(16,185,129,.4)}.calendar-day.ovulation{background:rgba(245,158,11,.3);color:#fcd34d;border:2px solid rgba(245,158,11,.6);font-weight:700}.calendar-day.luteal{background:var(--color-primary-muted);color:#67e8f9;border:1px solid var(--color-primary-muted)}.calendar-day.follicular{background:rgba(139,92,246,.15);color:#c4b5fd;border:1px solid rgba(139,92,246,.25)}.calendar-day.today{box-shadow:0 0 0 2px #f1f5f9;font-weight:700}.calendar-day:not(.empty):hover{transform:scale(1.1);z-index:1}.calendar-legend{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center;margin-top:1rem;padding-top:1rem;border-top:1px solid #334155}.legend-item{display:flex;align-items:center;gap:.4rem;font-size:.8rem;color:#cbd5e1}.legend-color{width:14px;height:14px;border-radius:4px;display:inline-block}.legend-period{background:rgba(239,68,68,.4);border:1px solid rgba(239,68,68,.6)}.legend-fertile{background:rgba(16,185,129,.4);border:1px solid rgba(16,185,129,.6)}.legend-ovulation{background:rgba(245,158,11,.5);border:1px solid rgba(245,158,11,.7)}.legend-luteal{background:var(--color-primary-muted);border:1px solid var(--color-primary-muted)}.legend-today{background:0 0;border:2px solid #f1f5f9}.predicted-cycles{background:var(--bg-card);border-radius:10px;padding:1.5rem;margin-bottom:2rem}.predicted-cycles h3{margin-bottom:1rem;color:#e2e8f0}.predicted-list{display:grid;gap:.75rem}.predicted-cycle-item{display:flex;align-items:center;gap:1rem;padding:1rem;background:#0f172a;border-radius:8px;border-left:3px solid var(--color-primary)}.predicted-cycle-item .cycle-number{font-weight:700;color:var(--color-primary);min-width:90px}.predicted-cycle-item .cycle-dates{color:#e2e8f0;font-size:.9rem}.predicted-cycle-item .cycle-ovulation{color:#fcd34d;font-size:.85rem;margin-left:auto;white-space:nowrap}.tips-section{background:var(--bg-card);border-radius:10px;padding:1.5rem;margin-bottom:2rem}.tips-section h3{margin-bottom:1rem;color:#e2e8f0}.tips-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem}.tip-card{background:#0f172a;border-radius:8px;padding:1.25rem;border-top:3px solid var(--color-primary)}.tip-card h4{font-size:.95rem;color:var(--color-primary);margin-bottom:.5rem}.tip-card p{font-size:.85rem;color:#94a3b8;line-height:1.55}.disclaimer{background:rgba(245,158,11,.08);border:1px solid rgba(245,158,11,.25);border-radius:10px;padding:1.5rem;margin-bottom:2rem}.disclaimer h3{color:#fbbf24;font-size:1rem;margin-bottom:.75rem}.disclaimer p{color:#d1d5db;font-size:.88rem;line-height:1.6}.site-footer{display:flex;gap:1.5rem;justify-content:center;padding:2rem 0;border-top:1px solid #334155;margin-top:2rem}.site-footer a{color:var(--color-primary);text-decoration:none;font-size:.9rem;transition:color .2s ease}.site-footer a:hover{color:#22d3ee;text-decoration:underline}@media (max-width:600px){.calculator-card{padding:1.25rem}.summary-grid{grid-template-columns:1fr 1fr}.summary-value{font-size:1rem}.calendar-day{font-size:.75rem}.calendar-legend{gap:.5rem}.legend-item{font-size:.72rem}.predicted-cycle-item{flex-wrap:wrap}.predicted-cycle-item .cycle-ovulation{margin-left:0;width:100%}.tips-grid{grid-template-columns:1fr}}