:root{--stamp-green: #4CAF50;--stamp-green-light: #81C784;--stamp-red: #E53935;--stamp-red-light: #EF9A9A;--stamp-white: #FFFFFF;--stamp-yellow: #FDD835;--stamp-yellow-light: #FFF59D;--bg-primary: #FAFAFA;--bg-secondary: #F5F5F5;--bg-card: #FFFFFF;--text-primary: #212121;--text-secondary: #757575;--text-on-dark: #FFFFFF;--border-color: #E0E0E0;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .12);--shadow-md: 0 4px 6px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 25px rgba(0, 0, 0, .15);--accent: #4CAF50;--accent-dark: #388E3C;--danger: #E53935;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 16px;--radius-full: 50%;--nav-height: 60px;--header-height: 56px;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:var(--font-family);background:var(--bg-primary);color:var(--text-primary);line-height:1.5;min-height:100dvh;overflow-x:hidden;-webkit-font-smoothing:antialiased}#app{display:flex;flex-direction:column;min-height:100dvh}.header{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;height:var(--header-height);padding:0 16px;background:var(--accent);color:var(--text-on-dark);box-shadow:var(--shadow-sm)}.header h1{font-size:1.125rem;font-weight:600}.content{flex:1;padding:16px;padding-bottom:calc(var(--nav-height) + 80px);overflow-y:auto}.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:100;display:flex;height:var(--nav-height);background:var(--bg-card);border-top:1px solid var(--border-color);box-shadow:0 -2px 8px #0000000f}.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:6px 0;border:none;background:none;color:var(--text-secondary);font-size:.7rem;font-family:inherit;cursor:pointer;transition:color .15s;-webkit-tap-highlight-color:transparent}.nav-item.active{color:var(--accent)}.nav-item svg{width:24px;height:24px;fill:currentColor}.fab{position:fixed;bottom:calc(var(--nav-height) + 16px);right:16px;z-index:90;width:56px;height:56px;border:none;border-radius:var(--radius-full);background:var(--accent);color:var(--text-on-dark);font-size:1.75rem;cursor:pointer;box-shadow:var(--shadow-lg);display:flex;align-items:center;justify-content:center;transition:background .15s,transform .15s;-webkit-tap-highlight-color:transparent}.fab:active{transform:scale(.92);background:var(--accent-dark)}.card{background:var(--bg-card);border-radius:var(--radius-md);padding:16px;box-shadow:var(--shadow-sm);margin-bottom:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:none;border-radius:var(--radius-sm);font-family:inherit;font-size:.9375rem;font-weight:500;cursor:pointer;transition:background .15s,opacity .15s;-webkit-tap-highlight-color:transparent;min-height:48px}.btn-primary{background:var(--accent);color:var(--text-on-dark)}.btn-primary:active{background:var(--accent-dark)}.btn-secondary{background:var(--bg-secondary);color:var(--text-primary)}.btn-danger{background:var(--danger);color:var(--text-on-dark)}.btn-block{width:100%}.toggle-group{display:flex;flex-wrap:wrap;gap:8px}.toggle-btn{padding:10px 16px;border:2px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-primary);font-family:inherit;font-size:.875rem;cursor:pointer;transition:all .15s;min-height:44px;-webkit-tap-highlight-color:transparent}.toggle-btn.active{border-color:var(--accent);background:var(--accent);color:var(--text-on-dark)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;background:#00000080;display:flex;align-items:flex-end;justify-content:center}.modal-content{width:100%;max-width:480px;max-height:90dvh;background:var(--bg-card);border-radius:var(--radius-lg) var(--radius-lg) 0 0;padding:24px 16px;overflow-y:auto;animation:slideUp .2s ease-out}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.section-label{font-size:.8125rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;margin-top:20px}.section-label:first-child{margin-top:0}textarea{width:100%;padding:12px;border:2px solid var(--border-color);border-radius:var(--radius-sm);font-family:inherit;font-size:.9375rem;resize:vertical;min-height:60px}textarea:focus{outline:none;border-color:var(--accent)}.disclaimer{font-size:.75rem;color:var(--text-secondary);line-height:1.4;padding:12px;background:var(--bg-secondary);border-radius:var(--radius-sm);margin-top:16px}.empty-state{text-align:center;padding:48px 24px;color:var(--text-secondary)}.empty-state h2{font-size:1.125rem;margin-bottom:8px;color:var(--text-primary)}.empty-state p{font-size:.875rem}.stamp{display:flex;flex-direction:column;align-items:center;gap:2px;width:100%}.stamp-circle{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;position:relative;border:2px solid transparent;transition:transform .1s}.stamp-circle:active{transform:scale(.9)}.stamp-green .stamp-circle,.stamp-greenBaby .stamp-circle{background:var(--stamp-green);color:var(--text-on-dark)}.stamp-red .stamp-circle{background:var(--stamp-red);color:var(--text-on-dark)}.stamp-white .stamp-circle,.stamp-whiteBaby .stamp-circle,.stamp-whiteBabyP .stamp-circle,.stamp-whiteBaby1 .stamp-circle,.stamp-whiteBaby2 .stamp-circle,.stamp-whiteBaby3 .stamp-circle{background:var(--stamp-white);border-color:#bdbdbd;color:var(--text-primary)}.stamp-greenBaby1 .stamp-circle,.stamp-greenBaby2 .stamp-circle,.stamp-greenBaby3 .stamp-circle{background:var(--stamp-green);color:var(--text-on-dark)}.stamp-yellow .stamp-circle,.stamp-yellowBaby .stamp-circle{background:var(--stamp-yellow);color:var(--text-primary)}.stamp-baby-dot{position:absolute;bottom:-1px;right:-1px;width:12px;height:12px;border-radius:50%;background:#ff9800;border:1.5px solid var(--bg-card);display:none}.stamp-greenBaby .stamp-baby-dot,.stamp-whiteBaby .stamp-baby-dot,.stamp-whiteBabyP .stamp-baby-dot,.stamp-whiteBaby1 .stamp-baby-dot,.stamp-whiteBaby2 .stamp-baby-dot,.stamp-whiteBaby3 .stamp-baby-dot,.stamp-greenBaby1 .stamp-baby-dot,.stamp-greenBaby2 .stamp-baby-dot,.stamp-greenBaby3 .stamp-baby-dot,.stamp-yellowBaby .stamp-baby-dot{display:block}.stamp-code{font-size:.5625rem;color:var(--text-secondary);white-space:nowrap;max-width:44px;overflow:hidden;text-overflow:ellipsis;text-align:center}.stamp-day{font-size:.625rem;color:var(--text-secondary)}.stamp-intercourse{position:absolute;top:-2px;left:-2px;width:10px;height:10px;border-radius:50%;background:#7b1fa2;border:1.5px solid var(--bg-card);display:none}.has-intercourse .stamp-intercourse{display:block}.stamp-lg .stamp-circle{width:56px;height:56px;font-size:1.25rem}.stamp-lg .stamp-baby-dot{width:16px;height:16px}.stamp-lg .stamp-code{font-size:.8125rem;max-width:80px}.chart-container{overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:8px}.chart-table{border-collapse:collapse;min-width:100%}.chart-header{position:sticky;top:0;z-index:10;background:var(--bg-primary)}.chart-header th{font-size:.625rem;font-weight:600;color:var(--text-secondary);padding:4px 2px;text-align:center;min-width:44px;border-bottom:2px solid var(--border-color)}.chart-header th:first-child{position:sticky;left:0;z-index:11;background:var(--bg-primary);min-width:60px}.cycle-row td{padding:4px 2px;text-align:center;vertical-align:top;border-bottom:1px solid var(--border-color);min-width:44px}.cycle-row td:first-child{position:sticky;left:0;z-index:5;background:var(--bg-card);font-size:.6875rem;font-weight:600;color:var(--text-secondary);text-align:left;padding-left:4px;min-width:60px;white-space:nowrap}.cycle-label{display:flex;flex-direction:column;gap:1px}.cycle-label-num{font-size:.75rem;color:var(--text-primary)}.cycle-label-date,.cycle-label-len{font-size:.5625rem;color:var(--text-secondary)}.chart-empty{background:var(--bg-secondary)}.chart-peak-col{background:#ffeb3b14}.chart-legend{display:flex;flex-wrap:wrap;gap:12px;padding:12px 0;margin-top:8px}.legend-item{display:flex;align-items:center;gap:6px;font-size:.75rem;color:var(--text-secondary)}.legend-dot{width:16px;height:16px;border-radius:50%}.legend-dot-green{background:var(--stamp-green)}.legend-dot-red{background:var(--stamp-red)}.legend-dot-white{background:var(--stamp-white);border:1px solid #BDBDBD}.legend-dot-yellow{background:var(--stamp-yellow)}